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MPR2000
Digital Motor Protection Relay
P&B Engineering
Belle Vue Works
Boundary Street
Manchester
M12 5NG
Tel: 0161 230 6363
Fax: 0161 230 6464
E-mail [email protected]
Issue I
Contents
CONTENTS ...................................................................................................................................................................... 1
1. INTRODUCTION...................................................................................................................................................... 1
2. SUMMARY OF MPR2000 FEATURES.................................................................................................................. 1
2.1 PROTECTIVE FUNCTIONS ........................................................................................................................................ 1
2.2 DISPLAYED DATA ................................................................................................................................................... 2
2.3 FEATURES .............................................................................................................................................................. 2
3. TECHNICAL SPECIFICATION ............................................................................................................................. 3
3.1 TECHNICAL DATA .................................................................................................................................................. 3
3.1.1 AUXILIARY POWER SUPPLY................................................................................................................................. 3
3.1.2 PHASE CURRENT INPUTS ..................................................................................................................................... 3
3.1.3 EARTH FAULT CURRENT INPUTS ......................................................................................................................... 3
3.1.4 LINE VOLTAGE INPUTS ........................................................................................................................................ 3
3.1.5 THERMISTOR/RTD INPUTS (3 OR 5 CHANNEL) ................................................................................................... 3
3.1.6 OVERLOAD ALARM AND TRIP CURVES................................................................................................................ 3
3.1.7 CURRENT UNBALANCE ALARM AND TRIP ........................................................................................................... 3
3.1.8 FAULT TIME DELAYS .......................................................................................................................................... 4
3.1.9 RELAY CONTACTS ............................................................................................................................................... 4
3.1.10 DIELECTRIC STRENGTH ..................................................................................................................................... 4
3.2 MPR2000 IMMUNITY AND EMISSIONS TESTS ............................................................................................ 4
4. MPR2000 SCHEMATIC DIAGRAM ...................................................................................................................... 4
5. MPR2000 MEASURED INPUTS ............................................................................................................................. 6
5.1 POWER SUPPLY ...................................................................................................................................................... 6
5.2 VT INPUTS ............................................................................................................................................................. 6
5.3 CT PHASE INPUTS .................................................................................................................................................. 6
5.4 EARTH FAULT CT INPUTS ...................................................................................................................................... 6
5.5 TEMPERATURE INPUTS ........................................................................................................................................... 6
5.6. POWER. ................................................................................................................................................................. 6
6. MPR2000 CONTROL INPUTS/OUTPUTS ............................................................................................................ 7
6.1 OUTPUT RELAYS .................................................................................................................................................... 7
6.2 CONTROL INPUTS ................................................................................................................................................... 7
6.3 AUTHORISE KEY .................................................................................................................................................... 7
6.4 SERIAL PORT .......................................................................................................................................................... 7
6.5 SPEED SWITCH ....................................................................................................................................................... 7
6.6 EXTERNAL FAULT 2................................................................................................................................................ 7
6.7 EXTERNAL FAULT 3................................................................................................................................................ 7
6.8 EMERGENCY STOP.................................................................................................................................................. 7
7. MPR2000 FACEPLATE FUNCTIONS ................................................................................................................... 8
7.1. LED STATUS PANEL ............................................................................................................................................. 8
8. MPR2000 FUNCTIONAL KEYPAD & DISPLAY................................................................................................. 9
Page 1
9. MPR2000 SETTING AND DATA PAGES ............................................................................................................ 11
9.1 MPR2000 COMMUNICATION SETTINGS ............................................................................................................... 11
9.2 SYSTEM SETTINGS ................................................................................................................................................ 11
9.3 VOLTAGE SETTINGS ............................................................................................................................................. 12
9.4 CURRENT SETTINGS ............................................................................................................................................. 13
9.5 TEMPERATURE SETTINGS ..................................................................................................................................... 16
9.6 TRIPPING/ALARM OPTIONS................................................................................................................................... 16
9.7 MPR2000 SETTING PAGES SUMMARY ................................................................................................................. 17
9.8 MPR2000 DATA PAGES SUMMARY ..................................................................................................................... 19
10. MPR2000 COMMUNICATIONS......................................................................................................................... 19
11. MPRSET SOFTWARE ......................................................................................................................................... 20
12. MPR2000 FLASH/CONSTANT MESSAGES..................................................................................................... 20
13. MPR2000 INTERNAL TEST ROUTINES .......................................................................................................... 20
14. MPR2000 FAULT FINDING ................................................................................................................................ 21
15. MPR2000 THERMAL OVERLOAD PROTECTION........................................................................................ 22
16. MPR2000 INSTALLATION ................................................................................................................................. 26
16.1 CASING............................................................................................................................................................... 26
16.2 MPR2000 TERMINATIONS ................................................................................................................................. 27
17. FAST SCAN ANALOGUE DATA........................................................................................................................ 28
18. CHANGES TO THE MANUAL. .......................................................................................................................... 28
Page 2
1. Introduction
The MPR2000 Motor Protection Relay is a highly sophisticated microprocessor based motor protection relay
specifically designed to be used on motors with full load currents up to 2000 Amps, at any voltage and as an integral
part of any type or manufacture of Motor Control Centre. All of the latest features are included in the MPR2000 to
allow total protection and monitoring of motor starters.
The MPR2000 can be used to protect Direct on Line, Star Delta, Reversing and Two speed motor starters. The
MPR2000 can be used in conjunction with A.C. Variable Speed Drives or Soft Starters without any affect on the
protection performance.
The MPR2000 monitors current, voltage and temperature inputs to provide the most comprehensive motor protection
package ever produced by P & B Engineering. This combined with it's monitoring functions and a high speed
communications facility make the MPR2000 the most attractive Motor Protection device available today.
All MPR2000 setting parameters are programmed independently for each unit via the integral keypad and liquid crystal
display on the front plate or via the RS485 communications port and the IBM PC based MPCSET software package
available with the MPR2000.
During operational conditions the LCD also gives access to accurate running, statistical and fault data such as; Phase
Volts, Phase Amps, Thermal capacity, Time to Trip, Phase unbalance, Motor hours run, No. of starts and many more.
Light Emitting Diodes mounted on the front plate give visual indication of the motor status such as Motor Running,
Motor Stopped, Alarm or Trip conditions etc.
Flexible high speed communications to PLC or DCS systems is obtained through the MPR2000's RS485
communications port, allowing computer access to full monitoring of motor data,
including : running data, motor statistical data and input status.
All MPR2000 protective functions can be individually configured to enable or disable tripping and alarm functions,
enabling protection to be simplified for the very lowest motor ratings. In addition each protective function can be set
to allow self or manual reset after alarm or trip and manual reset can be set to allow resets after an alarm or trip to be
made locally, or remotely via the RS485 port, or by authorised personnel only.
The MPR2000 has Power Indication. This gives Power (Watts and VA) and Power Factor read-outs in the measured
data page. It requires a 3 phase voltage input.
2. Summary of MPR2000 Features
2.1 Protective Functions
Voltage Based:
3 Phase Undervoltage Protection
3 Phase Overvoltage Protection
Phase Sequence Protection
Phase Loss Protection
Current Based:
Motor Starts Limitation
Thermal Overload Protection
Load increase Alarm
Thermal Capacity Pre-Alarm
Locked Rotor/Stall Protection
2 Stage Undercurrent Protection
High Set Overcurrent Protection
Low Set Overcurrent Protection
2 Stage Current Unbalance Protection
2 Stage Earth Fault Protection
Excess Starting Time Protection
Excess No. of Starts Protection
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MPR2000
RTD/Thermistor Based:
3 Channel RTD/Thermistor Temperature Protection
5 Channel RTD/Thermistor Temperature Protection (Optional)
2.2 Displayed Data
Measured Data
Both Phase Volts and Line Volts
Earth Fault Phase Current
Total Real Power
Total VA Power
Power Factor
RTD/Thermistor Channel resistance
Calculated Data
Motor Load - Percentage FLC
Thermal Capacity Used
Time to Trip
Time to Start
Unbalance Current
Logical Input Status
Motor Available Indication
Individual Status of all Input Contacts
Statistical Data
Motor Hours Run
Number of Motor Starts
No.of Motor Trips
Last Start Time
Last Peak Starting Current
Fault Data
Last Fault
Last Alarm
Phase Currents at Time of Trip
Earth Fault Current at Time to Trip
Phase Volts at Time of Trip
2.3 Features
•
•
•
•
•
•
•
LCD Display for Setting Parameters and Displayed Data
Functional Keypad enables settings to be made independent of communications.
IBM PC based MPCSET software enables Setting Parameters to be configured via RS485 Port.
All functions operate fully independently of communications
Non Volatile Memory for all setting parameters calculated, statistical and fault data
Full self diagnostics and internal watchdog facility
RS485 port enables full monitoring by remote DCS/PLC systems
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MPR2000
3. Technical Specification
3.1 Technical Data
3.1.1 Auxiliary Power Supply
AC Nominal:
DC Optional
Frequency:
Maximum Power Consumption:
3.1.2 Phase Current Inputs
Method:
Range:
Full Scale
Accuracy:
3.1.3 Earth Fault Current Inputs
Method:
Range:
Full Scale:
Accuracy:
3.1.4 Line Voltage Inputs
Method:
Without VT Transformer
Range:
Accuracy:
With VT Transformer
Range:
Accuracy:
110V AC, Range: 80 - 135V AC
240V AC, Range: 160 - 270V AC
30v DC, 110v DC (other values on request)
45/65 Hz
6 - 8VA
True RMS, Sample time 0.5mS
0.05 to 12 x Phase CT Primary Amps
12 x Phase CT Primary Amps setting
+/- 1.5% for 0.9 to 1.5 x CT Primary
+/- 5% above 1.5 x CT Primary
+/- 3% + 0.02 below 0.9 x CT Primary
True RMS, sample time 0.5mS
0.05 to 1.0 x E/F CT Primary
1.0 x E/F CT Primary Amps Setting
+/- 1.5% of Full Scale
True RMS, sample time 0.5mS
90 - 660V AC
+/- 1.0% of Full Scale
90 - 660V x (VT Primary/VT Secondary)
Limited to 25kV
+/- 1.0% of Full Scale
3.1.5 Thermistor/RTD Inputs (3 or 5 Channel)
Time Delay:
0.5 +/- 0.2 seconds
Thermistor Range:
0.1 - 30 Kilo-Ohms
Accuracy:
+/- 0.1 Kilo-Ohm up to 5 Kilo-Ohm
+/- 3% above 5 Kilo-Ohm
RTD Range:
100 to 240 Ohms
Accuracy:
+/- 3%
Max. Wire Resistance:
25 Ohms
3.1.6 Overload Alarm and Trip Curves
Fault Time Accuracy:
Threshold Current Level:
+/- 1 second up to 10 seconds
+/- 1 second +/- 2% above 10 seconds
Overload Setting +/- 1.5%
3.1.7 Current Unbalance Alarm and Trip
Method:
Unbalance = 100 x (Imax - Imin) / Ir %
Where Imax = max. of 3 phase currents
Imin = min. of 3 phase currents
Ir = Larger of Imax or Motor FLC
Alarm
Threshold Unbalance Level:
50% of Unbalance current +/- 2%
Fixed Time Delay Accuracy:
1.0 +/- 0.5 seconds
Trip Curves
Threshold Unbalance Level:
Unbalance Current Setting +/- 2%
Trip Time Accuracy:
+/- 1 second up to 10 seconds
+/- 1 second +/- 2% above 10 sec.
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MPR2000
3.1.8 Fault Time Delays
Accuracy:
Exceptions
High Set Over-current:
Earth Fault Trip:
Accuracy:
3.1.9 Relay Contacts
Rated Load:
Maximum Operating Voltage:
Maximum Operating Current:
Minimum Permissible Load:
Note:
+/- 0.5 seconds or +/- 2% of time
-0.1 to +0.2 sec. up to 1 second
-0.1 to +0.2 sec. for less than
1 second delay Total Run Time
+/- 2%
8A @ 250V AC/8A @ 30V DC (Resistive)
6A @ 250V AC/3A @ 30V DC (Inductive)
280V AC, 125V DC
8 Amps
5V DC, 100mA
AC Inductive load PF = 0.4
DC Inductive Load L/R = 7mS
3.1.10 Dielectric Strength
2000V AC for 1 minute, between ground and:
* Current Inputs
* Voltage Inputs
* Auxiliary Power Supply,
with 1000pF Suppression Capacitors removed
* Control Terminals,
with 1000pF Suppression Capacitors removed.
3.2 MPR2000 IMMUNITY AND EMISSIONS TESTS
The MPR2000 was successfully tested at the ERA Technology Centre in Leatherhead on the 7th April 1992 to comply
with the European Standards on Emissions (EN50081-1) and Immunity (EN50082-2).
4. MPR2000 Schematic Diagram
The following diagram shows a typical installation schematic diagram of the MPR2000 unit. The following points
should be noted:
Although not shown on the diagram it is recommended that the 3 phase input voltage should be fused after the take off
point from the system voltage or in the case of HV systems where a voltage transformer is used the secondary should
be also be fused.
When using the residually connected Earth Fault scheme it may be necessary to fit a swamping resistor between the
common connection and the earth connection. It is generally advisable to use Core balance ct's whenever possible.
If an externally mounted Emergency Stop push-button is
fitted to the motor starter it may be beneficial, so that the
MPR2000 reads Emergency Stop as a trip, to connect a
contact from the button to the External Emergency Stop
terminals shown on the diagram.
The case earth must be externally grounded to earth. The
terminals 11, 12 and 54 are internally connected and one of
them should be connected to either the case earth or separate
earth if a separate instrument earthing is required. This can
be done as shown in the diagram.
Issue I 29/08/03
Page 4
MPR2000
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OPTIONAL]
INDICATION ONLY
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OVERLOAD TRIP
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NOT IN USE
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ALTERNATIVE RESIDUAL EARTH FAULT CONNECTION
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SWAMPING
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GND
AUTHORISE KEY (CLOSED = AUTHORISED)
?@
AUX 1 RELAY [ALARM]
||
LOGIC SUPPLY
CONTACT SHOWN IN
DE-ENERGISED STATE
EXTERNAL FAULT 2 (NO)
AB
ALT. AUX POWER SUPPLY
EXTERNAL FAULT 3 (NO)
T
T
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P
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-
3
, 2
/ /
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SPEED SWITCH (OPEN = HIGH)
3 RTD OR 3 THERMISTORS
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CHANNEL 2
ON [THERMISTOR]
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CHANNEL 5
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OPTIONAL 2 RTD INPUTS
SCREEN
RS485 SERIAL PORT
EXTERNAL EMERGENCY STOP (NC)
DIP SWITCH SETTINGS
FOR CHANNELS 1,2&3
CHANNEL 4
.
OFF [RTD]
CT2
CT1
CT4
CT3
3
NOTE:
RELAY SUPPLIED AS 1 AMP
OR 5 AMP AS REQUIRED.
MEASURMENT
VOLTAGES
,0
,.
6- 6
,/
6
,
/
,-
.
SHIELD
NOTE TERMINALS 11,12
& 54 ARE INTERNALLY
CONNECTED.
FOR SEPERATE INSTRUMENT
EARTHING TERMINAL 11
MUST BE CONNECTED TO
A SEPERATE EARTH FROM
THE CASE.
OTHERWISE CONNECT TO
THE CASE. (SEE SECTION 4.0)
bc
CHANNEL 3
/ /
P&B ADVISE THAT A SHORTING
LINK BE APPLIED ACROSS THE
INPUT TERMINALS OF EACH
CHANNEL TO PRODUCE A ZERO
READING.
CHANNEL 1
4 0
FOR MOTOR APPLICATIONS
WITHOUT THE USE OF THE
RTD INPUTS:
THE CHANNEL INPUTS ARE
FAIL-SAFE i.e, WHEN 'OPEN'
THE READING WILL BE 'HIGH'
S
AD
AC
AUX 2 RELAY [TRIP]
*+
"'
&
"%
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"(
#
"
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"#
!
MOTOR
Issue H 1/5/98
Page 5
MPR2000
5. MPR2000 Measured Inputs
5.1 Power Supply
The MPR2000 requires a 110v or 240v A.C. voltage to supply the unit and provide the A.C. voltage to the external
inputs.
A DC version (80-265V DC) can also be supplied as an optional extra.
5.2 VT Inputs
The MPR2000 monitors single or three phase voltage, which can be directly connected for voltages up to 660v and via
a suitable voltage transformer for system voltages above 660v . In order that the MPR2000 can measure and display
actual volts, the system volts and VT primary and secondary volts must be set in the 'System Settings' page.
If single phase voltage reference only is available this is connected to L1 and N with L1,L2,L3 commoned. The System
Voltage setting in the 'System Settings' page must then be set to 1.732 x the line voltage. In addition the Phase
Sequence and Phase Loss protective functions must be disabled
5.3 CT Phase Inputs
The MPR2000 can be supplied for use with either 5A or 1A CT secondaries.(To be specified.)
5.4 Earth Fault CT Inputs
The MPR2000 can detect earth faults using either a separate core balance CT or by connecting the 3 phase CT's
residually. Either 5A or 1A CT secondaries must be specified. When residually connected phase CT's are used a
swamping resistor may have to be fitted across the common connection. Please note that the Earth Fault value is not
displayed on the MPR2000 till it reaches a value greater than 50% of the lowest Earth Fault Trip value.Refer to P & B
Engineering for further information.
5.5 Temperature Inputs
Thermistors of either positive or negative temperature coefficients can be directly connected to the MPR2000 by
selecting either PTC or NTC in the default menu. The alarm and tripping range can be adjusted between 100 ohms and
30,000 ohms.
RTD's can also be directly connected to the MPR2000 and selecting between the two inputs is via the front plate
keypad. As the resistance of RTD's is relatively low, the MPR2000 use a three wire measurement system for each
RTD, the third wire is required to compensate for the wire resistances. The alarm and tripping range of the RTD's can
be adjusted between 100 ohms and 240 ohms. Default setting is for RTD inputs.
In addition to selection of Thermistor or RTD temperature inputs via the Temperature setting page, dip switches
located behind the rear cover of the MPR2000 require setting. This can be carried out on site, however it is advisable
to specify the type being used, at the time of order such that the change can be made prior to the unit being despatched.
The earth for the RTD’s are on terminals 11, 12 and 54. These are internally connected so only terminal 11 need be
wired to an external earth if requested. See Section 4. For further details.
As an optional extra a 5 channel version is available, with this version 3 channels have common alarm and trip
settings and 2 channels have individual alarm and trip settings. The 2 channels are always RTD’s but the 3
channels are RTD’s (default) or Thermistors (Optional).
5.6. Power.
The Power applied to a motor is displayed on the MPR2000 and is calculated from the Current and Voltage inputs to
the relay. Please note that due to this calculation the Power and Power Factor is less accurate for Motors with a CT
Primary of less than 10 Amps.
Issue H 1/5/98
Page 6
MPR2000
6. MPR2000 Control Inputs/Outputs
6.1 Output Relays
The MPR2000 has 4 output relays which can be assigned as follows:
Pins 5,7,9
- Overload Trip (Indication)
Pins 6,8,10
- Earth Fault Trip (Indication)
Pin 33,35,37
- Aux. Relay 1 = Alarm con A con B start/run
Pins 34,36,38
- Aux. Relay 2 = Trip (Trip fail safe) cont A Cont B
6.2 Control Inputs
The MPR2000 provides several inputs to provide full protection for the motor. The supply to these terminals is derived
from the Power Supply to the relay. The live side of each inputs is commoned to enable simplified wiring to the unit,
however it should be noted that the common terminals are always live when power is connected to the MPR2000 and
the should always be isolated prior to working on the wiring at the rear of the unit.
The condition of all these inputs can be viewed at any time via the Logic Inputs/Contacts Data page which enables
complete wire checking without the need to disconnect or even gain access to wiring.
6.3 Authorise Key
When this input is open it prevents unauthorised access to alter the parameter settings of the MPR2000. All settings
can be viewed via the LCD display irrespective of the state of this input. However with the input open, an attempt to
adjust a setting will result in the " Unauthorised Access" message being displayed. In addition this input can be used to
restrict fault and alarm reset, if the Auto and Panel reset options of protective functions are disabled a fault can only be
reset from the panel if the authorised input is closed.
6.4 Serial Port
The Serial Port utilises a half duplex RS485 protocol allowing up to 32 MPR2000's to be daisy-chained together with a
single shielded twisted pair cable . Refer to P&B for details on communications.
6.5 Speed Switch
This input is used when the safe stall time of the motor is less than or equal to the normal run up time of the motor, in
which case the thermal overload feature will not provide adequate protection against stalling. Connection of a motor
speed switch, open when at high speed and closed when at low speed or standstill enables the MPR2000 to enable or
disable the locked rotor characteristic which is given under the Stall Time Factor setting.
6.6 External Fault 2
This inputs allows for tripping or alarming of external protective devices or interlocks. When closed the fault is
healthy and when opened a trip and/or alarm occurs depending on the Tripping/Alarm settings. Auto-Reset when
enabled, occurs when the input contact closes.
6.7 External Fault 3
This inputs allows for tripping or alarming of external protective devices or interlocks. When closed the fault is
healthy when opened a trip and/or alarm occurs depending on the Tripping/Alarm settings. Auto-Reset when enabled,
occurs when the input contact closes.
6.8 Emergency Stop
This input allows the MPR2000 to monitor the status and provide indication of the state of any of the external
Emergency Stop buttons which are normally directly wired to the contactor closing circuit. Opening of the input causes
a trip or alarm depending on the Tripping/Alarms Settings.
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MPR2000
7. MPR2000 Faceplate Functions
The MPR2000 Faceplate has been designed to provide all of the required information to the operator for the drive for
which the unit is being used. This is achieved by using a LED Status Panel and a Functional Keypad with a LCD
display.
This eliminates the need for additional indication devices on the front of the motor starter panel such as Lamps,
Ammeter, Voltmeter, Hours Run Indicator, Operations Counter, etc. which helps reduce the cost of the motor starter
panel and gives improved reliability by reduction of separate components.
The following section details the function of the Frontplate devices.
7.1. LED Status Panel
This panel incorporates 9 LED indicators which
provide the main status indications for the Motor
Starter panel
MPR POWER ON
STOPPED
The LED's operate as follows:
STARTING
green
LED
MPR2000 POWER ON This
illuminates when the auxiliary supply voltage to the
MPR2000 unit is connected.
RUNNING
OVERLOAD
EARTH FAULT
This
green
LED
MOTOR STOPPED
illuminates on power up and also when the motor
current is less than 12% of FLC and also when a stop
or fault signal is present.
ALARM
FAULT
INT. RELAY FAULT
MOTOR STARTING This amber LED is
illuminated only when the motor is starting and
remains illuminated providing the average motor
current is 110% or above of the Overload Setting.
This red LED illuminates after a motor has started providing the average motor current has
MOTOR RUNNING
decreased to below 110% of the Overload Setting and is above 12% of FLC
OVERLOAD
This red LED illuminates when a Thermal Overload trip has occurred.
EARTH FAULTThis red LED illuminates when an earth fault trip has occurred.
This red LED indicates that one of the MPR2000 Alarm functions has operated and remains
MOTOR ALARM
lit until the condition no longer exists and a reset has been performed.
This red LED illuminates when one or more of the MPR2000 Fault functions has operated
MOTOR FAULT
and stopped the motor. It remains lit until the condition no longer exists and a reset has been performed.
This red LED illuminates when an internal fault has been detected by the MPR2000
INTERNAL FAULT
watchdog feature and remains lit until the fault condition is no longer present and if required by the Alarm/Tripping
settings, a reset has been performed.
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MPR2000
8. MPR2000 Functional Keypad & Display
The MPR2000 is fitted with a functional keypad and a 32
character Alpha-Numeric LCD (Liquid Crystal Display).
This enables all settings to be viewed and configured on
each individual unit and enables the display of any of the
MPR2000 drive data.
The following pages explain the function of the LCD
display and the function of each key:
TIME TO TRIP
NO TRIP EXPECTED
MOTOR PROTECTION RELAY
Liquid Crystal Display
The MPR2000 has been equipped with a 2 line, 16
character per line liquid crystal display. The display is used
for the following functions:
Viewing and Changing of Setting Parameters
Viewing Data Parameters
Flash and Constant Messages
Any Data parameter can be selected as the default display
by pressing the STORE key whilst displaying the desired
parameter. The MPR2000 will always return to display this
parameter if no key is pressed or no Flash/Constant
Message is displayed for 5 minutes.
SET
PAGE
LINE
DOWN
DATA
PAGE
LINE
BACK
VALUE
RESET
TEST
STORE
VALUE
Set Page Key
This key when pressed enables the operator to select a page of the MPR2000 Setting parameters, for convenience the
setting parameters are grouped into logical pages. Each time the key is pressed the LCD display will show one of the
pages titles as follows:
Communication Settings
System Parameter Settings
Voltage Settings
Current Settings
Temperature Settings
Tripping/Alarm Options
Pressing the SET PAGE key again after the Tripping/Alarms Options title has been displayed will result in the display
returning to the Communications Settings title and so on.
Data Page Key
This key when pressed enables the operator to select a page of the MPR2000 Displayable Data. For convenience the
data are grouped into logical pages. Each time the key titles as follows:
Measured Data
Calculated Data
Logical Inputs - Contacts Status
Statistical Data
Fault Data
Pressing the DATA PAGE key again after the Fault Data title has been displayed will result in the display returning to
the Measured Data title and so on.
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MPR2000
Line Down Key
Pressing the LINE DOWN key enables the operator to scroll forward or down the particular page. The display will
move down one item at a time unless the button is held for over half a second in which case the scroll speed will
increase.
Line Back Key
Pressing the LINE BACK key enables the operator to scroll backwards or up the particular page of Settings or Data.
The display will move back one item at a time unless the button is held for over half a second in which case the scroll
speed will increase.
VALUE
Key
Pressing this key enable the operator to increase the value of the parameter displayed. The value will be increased by
one increment every time the key is pressed unless the key is held down for half a second in which case the rate of
change will increase.
If the Authorise input is open and the key is pressed the flash message ' Unauthorised Access' will be displayed and the
setting parameter will not be changed.
VALUE
Key
Pressing this key enable the operator to decrease the value of the parameter displayed. The value will be decreased by
one increment every time the key is pressed unless the key is held down for half a second in which case the rate of
change will increase.
If the Authorise input is open and the key is pressed the flash message ' Unauthorised Access' will be displayed and the
setting parameter will not be changed.
Store Key
This key is used to store a setting parameter to the non-volatile EEPROM memory after a change has been made using
the above mentioned keys. After the key has been pressed the flash message ' DATA SAVED OK' will be displayed. If
for any reason the change has not been correctly stored the message ' WRONG PARAMETER SAVED' will be
displayed
If the STORE key is pressed whilst the display shows a Data parameter then the parameter currently being displayed
will be set as the default display which the MPR2000 will always revert to if no key is pressed for 5 minutes and
provided a flash or constant message is not being displayed.
If the value of a parameter is changed but not stored and the display is scrolled to another page the parameter value
will be returned to the value stored in the EEPROM memory.
Note: It is possible to adjust and store setting parameters at any time , even whilst the motor is running. Changing the
value of a displayed parameter has no effect on the operation of the units until the STORE key is pressed.
After setting parameters have been stored to the EEPROM memory they are kept indefinitely, this feature does not rely
on a battery backup system.
Reset Key
This key enables the operator to reset MPR2000 Fault or Alarm conditions. Pressing of this key can only perform a
reset if the following conditions are met:
1 The Tripping/ Alarm Options for the specific fault or alarm re set to allow panel resets.
2. The condition that caused the Fault or Alarm to occur no longer exists
Providing condition 2 is met an operator can override the settings in the Tripping/Alarm Options by closing the
Authorise input and pressing the reset button. Note if the reset key is pressed and the Authorised input is closed a flash
message 'RESET THERMAL CAPACITY' is displayed and if the RESET button is pressed again whilst the message is
displayed the level of Thermal Capacity will be reset to zero.
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MPR2000
Test Key
The pressing of this key will cause the unit to display the Test/Maintenance menu. Using the LINE DOWN/LINE
BACK keys the following options are displayed
Run Self Test
Program Version
Store Enable Default Settings
Reset Statistical Data
For instructions on the use of these options refer to the Test Maintenance Options section later in this manual
9. MPR2000 Setting And Data Pages
9.1 MPR2000 Communication Settings
Drive Number
This setting range 0-320 with a default setting of 0, identifies the MPR2000 by an overall system number . This does
not affect the communications which uses the Serial Link Number.
Baud Rate
This setting range 110,300,1200,4800,9600 Bits/Second with a default setting of 9600, determines the speed of
communications between the PCX or when directly connected the Host system and the MPR2000. This is normally
set to the highest speed 9600 Bits/Second.
Serial Link No.
This setting range 1-33 with a default setting of 33, identifies the MPR2000 unit to the PCX unit to which the RS485
Data Highway is connected, and is also required to be set if the MPRSET software is to be used .
Fast Scan Anal 1,2 & 3
This setting range 0-201 determines the data that is sent to the PCX regardless of whether it asks for it. The settings
refer to the address's of the data in the software of the relay.
Fast Scan Update.
This setting range 0-30 s, in steps of 1 sec, determines the Fast Scan Update Time, i.e. the timeframe that the PCX asks
for the Fast Scan Data from the MPR2000.
To see the data that can be assigned to the Fast Scan Analogues please refer to section 17.
9.2 System Settings
Line Voltage
This setting range 0-660V in steps of 5v, or 1-22kv in steps of 100v, with a default setting of 415v, enables the
MPR2000 to display the measured voltages in exact volts. When only single phase voltage reference is available this
setting must be set to root 3 times the system voltage in order for the under and over voltage protective functions to
operate correctly.
Primary VT Voltage
This setting, range ‘Not Connected’ or 100V - 22kv in steps of 10v upto 1000v and 100v above 110v, with a default
setting of ‘Not Connected’, allows for systems with voltages above 660V , where the voltage reference to the
MPR2000 must be via a voltage transformer and the VT primary voltage is set with this function.
VT Secondary Voltage
This setti ng, range ‘Not Connected’ or 95V-660V in steps of 5v, with a default setting of ‘Not Conneted’,allows for
systems with voltages above 660V , where the voltage reference to the MPR2000 must be via a voltage transformer
and the VT secondary voltage is set with this function.
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MPR2000
Motor Full Load Current
This setting, range 1-2500 Ams in steps of 1 Amp upto 100 Amps and 5 Amps above, with a default setting of 100
Amps, determines the normal running full load current of the motor and enables protective functions to be set in terms
of percentage FLC and enables the MPR2000 to display running current in terms of percentage FLC.
CT Primary
This setting, range 1-2500 Amps in steps of 1Amp upto 100 Amps and 5 Amps above, determines the primary ratio for
the phase current transformers. When using motors with FLC up to 5 Amps which are direct connected (i.e. without
CT's this setting should be set to 5 Amps).
E/F Primary
This setting, range 1-2500 Amps in steps of 1 Amp upto 100 Amps and 5 Amps above, determines the primary ratio of
the core balance earth fault CT if used. If a residual connection of phase CT's is used this setting must be the same as
for the phase CT primary setting.
Earth Fault Alarm
This setting range 1-100% Inom in steps of 1%, with a default setting of 5%, specifies the level of earth fault current
before an alarm occurs.
Earth Fault Alarm Delay
This setting is used to select the time between an earth fault being registered and an alarm signal being activated.Range
1-60 seconds in steps of 1s with a default setting of 10s.
Earth Fault Trip
This setting range 1-100% Inom in steps of 1% , with a default setting of 10% specifies the level of earth fault current
before an trip occurs.
Earth Fault Trip Delay
This setting is used to select the time between an earth fault being registered and an trip signal being activated. Range
0-2 Seconds in steps of 0.1 Seconds with a default setting of 0.5 seconds.
Current Inhibit
This setting , range Off, or 400-1000% FLC in steps of 10%, with a default setting of ‘off’, determines the level at
which the Earth Fault feature will be inhibited from operating.
Starting Method Not applicable to this “protection only” relay.
Notes
The setting options for Aux 1 and Aux 2 output relays should always be set to alarm and Trip respectively.
9.3 Voltage Settings
Undervoltage Setting
This setting range 50-95% in steps of 1% with default setting of 80% of line voltage determines the pick up level of the
Undervoltage protection. When the measured voltages reaches this level for the period equal to the Undervoltage
Delay period a trip will be performed, unless the Undervoltage Restart feature is selected.
Undervoltage Delay
This setting range 0.2 - 10 seconds in steps of 0.1s with a default setting of 5s determines how long an Undervoltage
condition must be, before a trip occurs.
Overvoltage Alarm
This setting range 100-120% in steps of 1%, with a default setting of 115% of line voltage determines the pick up
voltage for the Overvoltage alarm function. When the measured voltage reaches this level and remains for 1 second an
alarm will occur.
Overvoltage Trip
This setting range 100-120% in steps of 1%, with a default setting of 120% of line voltage determines the pick up level
for the Overvoltage trip function. When the measured voltage reaches this level and is maintained for the Overvoltage
Trip Delay a trip will occur.
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MPR2000
Overvoltage Trip Delay
This setting range 1-100 seconds in steps of 1 second, with a default setting of 1 second determines how long an
Overvoltage must be present before a trip will occur.
9.4 Current Settings
Maximum Start Time
This setting with a range of 1 to 250 seconds in steps of 1 s with a default setting 10 seconds determines the time that
the motor is allowed to take to complete it's starting sequence.
Number of Starts
The number of starts the motor will make can be limited by the MPR2000 from anywhere between the range 1 to 10 in
steps of 1, with a default setting of 10.
Start Period
This specifies the time, within which the number of motor starts will be allowed to occur. Should the number of starts
selected be exceeded the motor will be inhibited from starting for a pre-selected time specified by the Start Inhibit
Time value. The start period can be between the range of 1 to 60 minutes in steps of 1 minute, with a default setting of
15 minutes.
Start Inhibit Time
This details the time that must elapse before the motor can be restarted after previously exceeding the number of starts
set within the start period. This is adjustable between the range of 1 to 60 minutes in steps of 1 minuts, with a default
setting of 15 minutes.
Undercurrent Alarm
If current falls the MPR2000 will sense this and an alarm will be signalled at a set percentage of FLC. This setting has
a range 10 - 90% in steps of 1% of FLC, with a default setting of 50%.
Undercurrent Alarm Delay
Linked to the undercurrent alarm this function can be pre-set to determine how long an undercurrent below the setting
can occur before an alarm will be signalled. It may be set between the range of 1 and 60 seconds in steps of 1s, with a
default value of 2 seconds.
Undercurrent Trip
This setting specifies below what undercurrent level the unit will trip. It is adjustable between the range of 10 and 90%
of FLC in steps of 1%, with a default value of 40% of FLC.
Undercurrent Trip Delay
This sets a time between the unit registering an undercurrent level and the actual tripping of the unit. Adjustable by the
user between the range of 1 and 60 seconds in steps of 1s, with a default setting of 5 seconds.
Load Increase Alarm
Should the load on the motor increase during operation the MPR2000 can sense this and signal an alarm. The pick up
level is adjustable between the range of 60 and 150% of FLC and has a default setting of 120% of FLC, with a fixed
time delay of 5 seconds.
Low Set Overcurrent
This setting is not in service during starting. It can be set between the range of 100 and 500% in steps of 10% of FLC
to afford the user a faster tripping time for overcurrent conditions than that available from the overload curve. The
default for this etting is 400% of FLC. This feature can also used to provide a fast operating definite time stall
protection after the motor is running.
Low Set Delay
This setting determines the time of the delay between the unit registering a low set overcurrent to it's alarm or trip
point. The setting is adjustable between the range of 0.5 and 10 seconds in steps of 0.5s, with a default setting of 2.0
seconds.
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MPR2000
High Set Overcurrent
This feature is normally enabled when the motor is being controlled by a circuit breaker rather than a fuse contactor.
The High Set Overcurrent unit can be set between the range of 400 and 1200% in steps of 10% of FLC, with a default
value of 800%.
High Set Delay
User set from the keypad, this setting determines the time between registering a High Set Overcurrent and an alarm or
trip being signalled. Adjustable between the range of instantaneous to 4 seconds in steps of 0.1s with a default setting
of 'Instantaneous'.
Overload Setting
Pre-settable overload setting range 60 to 130% in steps of 1% of FLC, with a default and P&B Engineering's
recommended setting of 105% of FLC. For further information refer to section 'MPR2000 Thermal Overload
Protection'
Thermal Capacity Alarm
User settable to specify a thermal capacity alarm value between the range of 50 and 99% in steps of 1% of capacity,
with a default setting of 80%.
t6x Time
This setting specifies the time the MPC2000 will take to trip at 6 times FLC and determine the basic thermal
characteristic. This time range 0.5 and 120 seconds, with a default setting of 10 seconds. For further information refer
to section 'MPR2000 Thermal Overload Protection'
Hot/Cold Ratio
Adjustable between 20 and 100% in steps of 1%, with a default setting of 50%. For further information refer to section
'MPR2000 Thermal Overload Protection'
Cool Time Factor
This setting specifies the time factor at which the running motor will cool down once it has been stopped. Adjustable
between the range of 1 to 15 in steps of 1 times the heating constant with a default setting of 5. For further information
refer to section 'MPR2000 Thermal Overload Protection'.
Stall Time Factor
To cater for stalling on starting particularly when the motor locked rotor characteristic is close to that normally seen
during a start. To achieve adequate protection the thermal characteristic may be switched to a lower value. The feature
is activated by connecting a speed switch between terminals 32 and 9 which enables or disables the stalling
characteristic which is adjustable between the range of 20 and 100% in steps of 1% of the thermal trip times, with a
default setting of 50%.
Overload Reset Method
With the exception of the Thermal Overload Protection all of the MPR2000 protective functions can be disabled.
When set to Auto the Overload trip will be self-reset when the thermal capacity has cooled to below 50% of the motor
capacity without the need for an operator reset. When set to Hand the fault will not reset until an operator reset is
performed but only if the thermal capacity used has reduced to 50%.
Aux 1 Designate, Alam, Contactor A, Contactor B, Run.
Aux 2 Designate Trip, Trip Fail Safe, Contactor A, Contactor B.
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MPR2000
Unbalance Current
This user adjustable setting allows the specifying of the amount of current unbalance that the motor can tolerate. This
can be set between the range of 10 and 40% in steps of 1% of FLC, with a default setting of 15%.
Current Unbalance Time Constant
This setting determines the time that the current may be unbalanced before a trip is initiated. The setting is adjustable
via the keypad. The value To has the range 20 - 120 seconds in steps of 1 second, the default value being 30 seconds,
and it refers to the inverse slope of the time verses %unbalance characteristic which has a reference point
corresponding to an Unbalance of 10%.
The unbalance trip function is an inverse-time characteristic of the form
T = 100 To
(uB)2
where
To = time constant setting
uB = The unbalance in %.
However the minimum trip time is 1 second and the minimum pick up is the same as the setting “unbalance Current”
above.
LOWER
LIMIT
UPPER
LIMIT
EXAMPLE
20 %
5%
40%
120
70
To=20
To=70
20
10
To=120
1
0.1
5
10
20
30
40
50
100
200
% UNBALANCE
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MPR2000
9.5 Temperature Settings
RTD/Thermistor
This determines whether Resistance Temperature Detectors or Thermistor are being used for temperature monitoring.
In addition to this setting a change in the setting of an internal group of dip switches is required, refer to notes given in
the MPR Measured Inputs section.
Thermistor Type
This setting, range PTC or NTC is only applicable if Thermistor is set above. It determines whether positive or
negative coefficient Thermistor are being used.
Channel 1 Alarm
This determines the resistance level at which an alarm will occur.
Channel 2 Alarm
This determines the resistance level at which an alarm will occur.
Channel 3 Alarm
This determines the resistance level at which an alarm will occur.
Channel 1 Trip
This determines the resistance level at which an trip will occur.
Channel 2 Trip
This determines the resistance level at which an trip will occur.
Channel 3 Trip
This determines the resistance level at which an trip will occur.
9.6 Tripping/Alarm Options
This page contains the following settings for each protective function incorporated in the MPR2000.
Trip
This determines whether operation of the protective function cause a trip to the motor or not. This can be applied to
an alarm such that an alarm can be made to trip.
Alarm
The option, whether the protective functions cause an alarm to occur and is applicable to both alarm and trip protective
functions.
Auto Reset
This allows self resetting of a fault or alarm once the fault is no longer present. In the case of Thermal Overload or Too
Many Starts faults the self reset will not occur until the capacity has cooled to 50% or the Starts inhibit period has
passed.
Panel Reset
This allows reset of a latched fault by pressing the reset button on the MPR2000 functional keypad, irrespective of the
state of the Authorise input. If this feature and the Auto Reset functions are disabled the only way to reset the fault
locally is by use of the Reset button when the Authorise input is closed.
The above options are provided individually for all of the MPR2000 protective functions:
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MPR2000
9.7 MPR2000 Setting Pages Summary
The diagrams that follow summarise all of the MPR2000 Setting and Data pages and gives the factory default setting
for all settings.
COMMUNICATION SETTINGS
SETTING RANGE
DEFAULT
Drive Number
Baud Rate
Serial Link No.
Fast Scan Anal 1
Fast Scan Anal 2
Fast Scan Anal 3
Fast Scan Update
1 - 320
110,300,1200,2400,4800,9600
1 - 33
0 - 201
0 - 201
0 - 201
0-30s
0
9600
33
0
1
2
0
100v-22kv
Not Connected, 100v-22kv
"
" ,
95-660v
1-2500A
1-2500A
1-2500A
1-100% Inom
1-60 Sec
1-100% Inom
0-2 Sec
off, 400-1000% FLC
Momentary, Maintained
DOLNR,Star/Delta,Reversing
2 Speed,Valve Control
1-60 Sec
0.05-2.0 Sec
75-200% FLC
1-2500A
0.5-120Sec
Alarm,Contactor A, Contactor B, Run
0-120 Sec
Trip, Trip Fail Safe, Contactor A,
Contactor B
0-120 Sec
Yes
415v
Not Connected
"
"
100A
100A
100A
5% Inom
10 sec
10% Inom
0.5 Sec
off
Momentary
DOLNR
50-95%
0.2-10 Sec
Yes,No
0.2-120 Seconds
100-120%
100-120%
1-100 Sec
80%
5 Sec
No
SYSTEM PARAMETER SETTINGS
Line Voltage
VT Primary
VT Secondary
Motor FLC
CT Primary
E/F CT Primary
Earth fault Alarm
"
"
" Delay
Earth Fault Trip
"
" " Delay
Current Inhibit
Start/Stop Signal
Starting Method
Max Time in Star
Transition Time
Star to Delta at
Low Speed FLC
Low Speed t6X
Designate Aux 1
Aux 1 Delay
Designate Aux 2
Aux 2 Delay
Protection Only
10 Sec
0.2 Sec
150% FLC
10A
10 Sec
Alarm
0
Trip
0
Yes
VOLTAGE SETTINGS
Undervoltage Setting
Undervoltage Delay
Undervoltage Restart
Undervoltage Restart Delay
Overvoltage Alarm
Overvoltage Trip
Overvoltage Trip Delay
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Page 17
115%
120%
1 Sec
MPR2000
CURRENT SETTINGS
Maximum Start Time
Number of starts
Start Period
Start Inhibit Time
Undercurrent Alarm
Undercurrent Alarm Delay
Undercurrent Trip
Undercurrent Trip Delay
Load Increase Alarm
Low Set Overcurrent
Low Set Overcurrent Delay
High Set Overcurrent
High Set Overcurrent Delay
Overload Setting
Thermal Capacity Alarm
t6x Time
Hot/Cold Ratio
Cool Time Factor
Stall Time Factor
Overload reset Method
Unbalance Current
Current Unbalance Time Constant
1-250 Sec
1-10
1-60 Min
1-60 Min
10 Sec
10
30 Min
30 Min
TEMPERATURE SETTINGS
SETTING RANGE
DEFAULT
RTD/Thermistor
Thermistor Type
Channel 1 Alarm
Channel 2 Alarm
Channel 3 Alarm
Channel 1 Trip
Channel 2 Trip
Channel 3 Trip
RTD/Thermistor
PTC,NTC
0-200 deg C or 100-240 or 100-30,000 ohm
0-200 deg C or 100-240 or 100-30,000 ohm
0-200 deg C or 100-240 or 100-30,000 ohm
0-200 deg C or 100-240 or 100-30,000 ohm
0-200 deg C or 100-240 or 100-30,000 ohm
0-200 deg C or 100-240 or 100-30,000 ohm
RTD
TRIPPING/ALARM OPTIONS
Function
T
10-90% FLC
1-60 Sec
10-90% FLC
1-60 Sec
60-150% FLC
100-500% FLC
0.5-10 Sec
400-1200% FLC
Inst-4 Sec
60-130% FLC
50-99%
0.5-120 Sec
20-100%
1-15
20-100%
Auto,Hand
5-40
20-120 Sec
A
AR
2 Sec
40$
5 Sec
120%
400$
2.0 Sec
800%
Inst
105%
80%
10 Sec
50%
5
50
Hand
15%
30 Sec
PR
Maximum Start Time
D
E
D
E
Too Many Starts
D
D
D
E
Undercurrent Pre-Alarm
D
E
D
E
Undercurrent Trip
D
D
D
E
Load Increase Alarm
D
E
D
E
Low Set Overcurrent
E
E
D
E
High Set Overcurrent
D
D
D
E
Thermal Pre-Alarm
D
E
D
E
Thermal Trip
E
E
D
E
Unbalance Alarm
D
E
D
E
Unbalance Trip
E
E
D
E
Undervoltage Trip
D
E
D
E
Overvoltage Pre-Alarm
D
E
D
E
Overvoltage Trip
E
E
D
E
Phase Loss
E
E
D
E
Phase Sequence
E
E
E
E
Temp 1 Channel Pre-Alarm
D
D
D
E
Temp 1 Channel Trip
D
D
D
E
Temp 2 Channel Pre-Alarm
D
D
D
E
Temp 2 Channel Trip
D
D
D
E
Temp 3 Channel Pre-Alarm
D
D
D
E
Temp 3 Channel Trip
D
D
D
E
Earth Fault Pre-Alarm
D
E
D
E
Earth Fault Trip
E
E
D
D
Serial Port Failure
D
D
E
E
Internal Relay Failure
D
E
D
D
Emergency Stop
D
D
D
E
Control Circuit Open
D
D
D
E
Welded Contactor
D
D
D
E
External Fault 2
D
D
D
E
External Fault 3
D
D
D
E
E=Enabled D=Disabled, T=Trip, A=Alarm, AR=Auto-Reset, PR=Panel Reset, R=Remote Reset
Issue I 29/08/03
Page 18
50%
140 deg C
140 deg C
140 deg C
150 deg C
150 deg C
150 deg C
R
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
D
E
D
E
E
E
E
E
MPR2000
9.8 MPR2000 Data Pages Summary
The following menus can be displayed by the Data Page Key. Under each menu title is data displayed on the MPR2000
on that data page. These are seen by pressing the Line Up and Line Down Keys.
MEASURED DATA
VP1, VP2, VP3
VL1, VL2, VL3
I1, I2, I3
E/F Current
R1, R2, R3
T1, T2, T3
Volts
Volts
Amps
Amps
Ohms
RTD
Total Real Power
Total VA Power
Power Factor
Watts
VA
%
CALCULATED DATA
Motor Load
Thermal Capacity
Time to Trip
Time to start
Unbalance Current
%
%
Min then Sec
Min then Sec
%
LOGICAL INPUTS
Drive Status
Speed Switch
Authorise Key
Emergency Stop
External Fault 2
External Fault 3
Available/Unavailable/Running
Open=high speed/closed=low speed
Open=locked/closed=unlocked
Closed=run enable/open=stop
" " " " "
" " " " "
STATISTICAL DATA
Total Run Time
Total # of starts
Total # of Trips
Last ST. Period
Last ST. Peak I
Hours
Secs
Amps
FAULT DATA
LAST TRIP
LAST ALARM
FAULT I1,I2,I3
Fault IO
Fault V1,V2,V3
Description
Description
Amps
Amps
Volts
10. MPR2000 Communications
The MPR2000 in addition to its very comprehensive protection has been equipped with a very powerful data
communications system. The relay provides high speed data acquisition to supervisory computers to form a complete
motor management system. Each MPR2000 can be connected to an isolated data highway using RS485
communications. Up to 32 MPR2000 units can be connected to each data highway.
For further information on the communication of the MPR2000 phone us for our booklet at
Manchester 0161-230-6363.
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MPR2000
11. MPRSET Software
.
All of the MPR2000 setting parameters mentioned above can be viewed and changed through the use of the MPRSET
Software offered by P & B Engineering. It is designed to configure large numbers of units quickly as well as storing
and printing the MPR2000 setting parameters.
For further information on the communication of the MPR2000 phone us for our booklet at
Manchester 0161-230-6363.
12. MPR2000 Flash/Constant Messages
The following Flash and Constant messages are displayed by the MPR2000 LCD :
DATA SAVED OK
to the EEPROM memory
This Flash message is displayed after a setting parameter has been correctly stored
If an attempt is made to change or store a setting parameter whilst the Authorise
UNAUTHORISED ACCESS
input is open this Flash message is displayed. This message will also be displayed if an attempt is made to reset a fault
for which the panel reset has been disabled.
This Flash message is displayed when the reset key is pressed if the
RESET THERMAL CAPACITY ???
Authorised input is closed and if the reset button is pressed whilst the message is displayed the Thermal Capacity will
be set to Zero.
THERMAL CAPACITY RESET PERFORMED
operation has been successfully performed.
This Flash message is displayed
after the above
SELF TEST PASSED This Flash message is displayed if the 'Run Self Test' function of the Test/Maintenance
Options is successfully performed.
This Flash message is displayed if an error has been found
SELF TEST FAILED ERROR CODE 32
during the operation of the 'Run Self Test' function in the Test/Maintenance Options.
This is a constant message which identifies which Alarm has operated and is displayed
ALARM 'XXXX'
when the Alarm LED is illuminated.
This is a constant message which is identifies which Fault has operated and is displayed
Fault 'XXXX'
when the Fault LED is illuminated.
13. MPR2000 Internal Test Routines
In addition to conventional hardware and software watchdog routines, the MPR2000 has been designed to include its
own internal test routines and watchdog. When the Test key is pressed the Test/Maintenance Menu will be displayed:Run Self Test
Program Version
Store Enable Default Settings
Reset & Store Statistical Data
These functions can only be performed if the Authorise input is closed, and operate as follows:
Run Self Test This option checks all the monitored hardware and software routines displaying the message "SELF
TEST PASSED" when completed successfully. Should this check fail then the message "SELF TEST FAILED" will
be displayed including an error code. The Internal Error LED will be illuminated and if enabled in the Tripping/Alarm
Options the unit will trip or alarm. The error code should be noted down and reported to P&B Engineering before
returning the unit for repair. A minimum period of 20 seconds should be allowed after aux power is applied before
carrying out a self test.
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MPR2000
Program Version
correspondence.
This gives the version of the software employed in your unit and should be quoted in all
Store Enable Default Settings
This will allow the user to reset the unit to the original factory set default settings
before any customer changes were made. This option should be used with care as all previous data will be lost.
Pressing of the STORE and SET PAGE keys simultaneously will affect this procedure.
Reset & Store Statistical Data
This allows the user to reset all statistical data and store at the reset value. Care
must also be taken when using this option, as all previous statistical data will be lost when reset. Pressing of the DATA
PAGE and RESET keys simultaneously will affect this procedure.
14. MPR2000 Fault Finding
This procedure details some of the more common faults which may cause the MPR2000 to not operate as required.
This is usually due to incorrect settings or logic and will hopefully assist to rectify the situation.
Check all connections at the rear of the unit have been made correctly.
Switch on the MPR2000 and ensure that the 'Power On' LED is illuminated. If not check the customer system.
If the motor starts but the MPR2000 alarms immediately, check the following:Ensure 'System Parameter Settings' and 'Tripping/Alarm Options' are correct.
Ensure correct temperature measurement device has been selected, i.e. Thermistor or RTD.
Ensure that the RTD inputs have been earthed. These are terminals 11, 12 and 54.(See Section 4.)
When selecting RTD PT100 the 100 Ohm resistance refers to the resistance at zero temperature. Ensure the
normal working temperature figure is added to this value. Usual setting approximately 140 Ohm.
•If selecting Thermistor set correct type, i.e. +ve or -ve.
•Check that the unit passes the 'Self Test Program'.
•When using the MPR2000 with a single phase input; special care needs to be given to the System Parameter Settings
to obtain correct results. In particular the Line Voltage parameter should be set at 1.732 times the expected line
voltage, e.g.
11KV system; set line voltage at 11Kv x 1.732 = 19KV
The VT Primary and VT Secondary values are set normally, i.e. VT Primary = 11KV VT Secondary =
110V
For Low Voltage systems, using for example a 240V phase to neutral input, the line voltage should be set to
415V.
If the unit still will not operate or still keeps alarming and has passed its self test, then seek further assistance from our
application help desks at Manchester 0161- 230-6363.
Issue I 29/08/03
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MPR2000
15. MPR2000 Thermal Overload Protection
MPR2000 Thermal Operating Curves
200
The curves shown are the time/current operating
characteristics for the MPR2000 Thermal Overload
protection.
100
t
Curve 1 :Cold Curve
Overload Setting =105%
Curve 2 :Hot Curve
Overload Setting =105%
Running From 100% FLC
Hot/Cold Ratio = 80%
20
10
Curve 3 : Hot Curve
Overload Setting:=105%
Running From 100% FLC
Hot/Cold Ratio = 50%
Curve 4 : Hot Curve
Overload Setting:=105%
Running From 100% FLC
Hot/Cold Ratio = 20%
2
1
Explanation
The MPR2000 simulates the thermal condition of the
motor by means of a thermal register. The heating of the
register is related to the square of the largest of the three
line currents. The rate of cooling of the thermal register
is directly related to the rate of heating. The value of
the thermal register is called thermal capacity and it is
used to simulate motor temperature.
0.2
0.1
100 percent thermal capacity means the motor
temperature has reached the maximum allowed and is
the level at which an overload trip will occur.
When the motor is stopped for a long period of time the
thermal capacity used is zero, this is known as the 'cold
condition', and the motor has 100 percent of it's thermal0.02
capacity available for heating before a trip will occur.
0.01
1
2
3
4
5
6 7 8 9 10
15
Multiples of FLC
When a motor starts and is running it's temperature
increases, after running at normal FLC for a period of time the motor will have reached a hot condition and a
lower value of thermal capacity will be available.
The Hot/Cold Ratio setting determines the amount of available thermal capacity for a motor running at FLC i.e. hot
condition, this is set as a percentage ratio of the amount of thermal capacity available at the cold condition which is
always 100%.
The thermal capacity available for a motor running at normal FLC i.e. Hot condition is the Hot/Cold Ratio setting. For
example if the Hot/Cold ratio setting is 60% and the motor has been running at normal FLC for some time the amount
of thermal capacity available is 60% then the amount displayed by the MPR2000 is the amount used which is 100 - 60
= 40%.
Providing the motor running current does not exceed the overload setting ( 105% FLC default) the thermal capacity
used will never reach 100% and therefore will never trip on overload
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MPR2000
When the running current exceeds the overload setting the thermal capacity will eventually reach 100% and trip the
motor. The time taken depends on the present value of thermal capacity used and the t6x setting, which is set as the
time to trip for a motor in a cold condition when the current is at 6 times the motor rated FLC. The heating constant is
equal to t6x setting x 32 seconds.
The expected 'Time To Trip' is the time it will take to reach 100% thermal capacity at the present running current level
is calculated and can be displayed by the MPR2000.
If a motor speed switch is installed and connected to the MPR2000 it is then possible to decrease the thermal trip time
in the range of 20-100% of the set hot & cold curve operating times when the motor stops rotating, i.e. stalled.
After a thermal overload trip it is not possible to reset the fault and restart the motor until the amount of thermal
capacity available has reduced to 50%.
The cooling time constant of a motor, i.e. the time taken for its temperature to drop is usually much longer than the
heating constant. The Cool Time Factor setting determines the rate of cooling and is set as a ratio of the heating time
factor between 1 and 15 times the heating factor. The higher the value of this setting the longer it will take for the
thermal capacity to reduce to the 50% level required to enable a restart.
The MPR2000 calculates the expected 'Time To Restart' and displays this value within the 'Calculated Data' page.
For testing purposes the resetting of the thermal capacity register to 0% can be manually performed only if the
'Authorise Key' input is enabled, and by pressing the Reset key which will cause the display to show 'Reset Thermal
Capacity ???'. If the Reset key is pressed again whilst this message is displayed i.e. within 1 second the register will be
reset to 0%.
The settings for 'Thermal Overload', 't6x', 'Hot/Cold Ratio' and 'Cool time Factor' should be established from data
obtained from the motor manufacturer however should it not be possible then the default settings for these are typical
settings for normal induction motors and may be used at the users own risk. The t6x setting can be set to 10% above
the normal run up time, which can be established after the unit is installed by starting the motor and noting the 'Last
Start Time' available in the MPR2000 'Statistical Data page.
The present value of thermal capacity is stored in the EEPROM non-volatile memory during a failure or disconnection
of the auxiliary supply. Upon restoration of the supply the former value will be maintained.
Referring to the MPR2000 Thermal Operating curves shown, the operating time at a certain multiple of motor FLC can
be calculated for a particular motor by multiplying the corresponding time taken from the vertical scales by the setting
of t6x.
Example Application
As an example of applying the MPR2000 Thermal Overload protection to a motor let us establish the settings for a
particular motor having the following characteristics:
Rating:
System Volts
FLC:
CT ratio
Starting
Start Time
Cold Withstand
Hot Withstand
100Kw
415 Volts
180 Amps
200/5 Amps
DOL
8 sec @ 6xFLC
22 Seconds
11 Seconds
The figures for Line Voltage, Motor FLC and CT Primary should be entered. For the Overload setting we will use the
default setting of 105%.
The t6x setting must now be calculated. This is set as the time taken to trip at 6 x FLC for the Cold Starting condition
and is set in conjunction with the Hot/Cold Ratio setting.
For the above typical motor the Hot Withstand time is 11 seconds, the Cold Withstand is 22 seconds, therefore the
Hot/Cold ratio is calculated as 11/22 x 100 = 50%.
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MPR2000
As a general rule the relay should be set to trip at no closer than 80% of the Thermal withstand Time, which in this
case is 80% x 22 sec = 17.6 secs. Therefore set t6x = 17 secs and set Hot/Cold Ratio = 50%
From the standard MPR2000 Thermal Operating Curves the Cold curve trip times can be calculated by multiplying the
setting t6x and the factor 't' for various multiples of FLC i.e.:
Multiple of FLC
Trip time (secs)
1.5
366
2.0
175
3.0
71
4.0
39
5.0
24
6.0
17
From the Hot Curve for Hot/Cold Ratio =50% trip times can be calculated as follows:
Multiple of FLC
Trip Time (secs)
1.5
230
2.0
102
3.0
40
4.0
22
5.0
14
6.0
9.5
The curves shown on the right are the
actual curves for the calculated figures
and show that the setting has been
chosen to provide close protection to
take advantage of the motors capability
and allow the possibility of an
immediate restart from the Hot
condition. However alternative settings
can be made to provide faster tripping
limited by the conditions of ensuring
the motor can run up speed under
healthy conditions without tripping.
If the Hot to Cold ratio is set to a figure
other than the 3 standard curves drawn,
then either the formula quoted below
can be used or an approximation of the
Hot curve can be drawn to calculate trip
times.
(Starting/Cold Condition)
tc = 32.a.loge
( p2 )
-------p2 - s2
where 'p' is multiple of motor FLC (per
unit value)
's' is overload setting in per
unit value e.g. 105%
'a'
is setting of t6x in seconds
't
c is the operating time in seconds
(Running/Pre-load Condition)
tc = 32.a.loge
( p2 - (1-H/C)(IL)2 )
-------------------p2 - s2
where 'I
L'is the steady state load prior to overload condition divided by motor FLC, e.g. if motor is running at FLC,
IL=1.
'H/C' is the hot/cold ratio in per unit value e.g. 40% hot to cold ratio = 0.40.
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MPR2000
The cool Time Factor is factory set at 5 unless specific information is available from the motor manufacturer to
calculate the actual setting it is recommended that the default setting is used.
With regard to current unbalance protection the pick up time default setting is 15% and trip time is 30 seconds. This
figure should be set to the motor requirements if the Negative Phase Sequence withstand can be obtained. Formula for
calculating the unbalance setting can be obtained from P & B Engineering on request.
Further help on the application of thermal overload protection by ringing P & B Engineering at Manchester on 061 230
6363.
Issue I 29/08/03
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MPR2000
16. MPR2000 Installation
16.1 Casing
The MPR2000 is supplied in a UK manufactured industry standard drawout case for flush mounting on the front of the
motor starter or circuit breaker cubicles.
96
102
156
45
2
23
10
4 HOLES 4.3mm DIAMETER
168
158
PANEL CUT OUT FLUSH
MOUNTING FIXING DETAILS
202
Min
28
NOTE Minimum gap between vertical
spacing is required in order to
PUSH BUTTON
PROJECTION 10mm
withdraw relay from the case above.
Clearance
166.25
40
178.5
208
155.5
178
M4 STUDS
Required to open case
Issue I 29/08/03
25 min
Page 26
NOT SHOWN TO SCALE
MPR2000
16.2 MPR2000 Terminations
All terminations to the MPR2000 are situated to the rear of the unit, and are suitable for use with standard crimped
connectors.
The rear terminal block accepts both pre-insulated screw and push-on blade type connectors. Each terminal has 1
screw type and 2 blade type connectors.
Screw:
Each connection uses a 4mm (M4) screw outlet and accepts standard L-shaped ring
type connectors designed for 4mm screws.
Blade:
Each connection facilitates 2 pre-insulated push-on blades 4.8mm wide 0.8mm thick
complying with BS5057.
Combinations:
Each terminal will accept either;
2 ring type connectors
or
2 push-on blade type connectors
or
1 ring type connector & 1 push-on blade type connector
The following diagram shows the position of the terminals.
Earth
Each terminal
1
2 29
30
3
4 31
32
5
6 33
34
7
8 35
36
9
10 37
38
11
12 39
40
13
14 41
42
15
16 43
44
17
18 45
46
19
20 47
48
21
22 49
50
23
24 51
52
25
26 53
54
27
28 55
56
1 screw &
2 spade
Rear terminal block connections.
All information subject to change without notice
Publication number MPR2000 Issue H
Issue I 29/08/03
Page 27
MPR2000
17. Fast Scan Analogue Data
The Fast Scan Analogue 1,2 and 3 can have the following data assigned to them to be read back to the PCX:Address
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
23
24
25
26
Data Represented.
Current in I1
Current in I2
Current in I3
Current in I0
Voltage in VP1
Voltage in VP2
Voltage in VP3
Voltage in VL12
Voltage in VL23
Voltage in VL31
Drive Status
Trips
Alarms
Time to trip
Time to start
Average RMS current
Motor load
Unbalance
Alarm fault number
Frequency
Resistance(4)
Phase Sequence
Control Input 1
Control Input 2
Control Input 3
Address
27
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
70
71
86
92
93
94
Data Represented.
Hardwire Command
Total run time
Total starts
Total trips
Thermal capacity
Trip fault number
Logic status
Pre trip I1
Pre trip I2
Pre trip I3
Pre trip I0
Pre trip VP1
Pre trip VP2
Pre trip VP3
Last start period
Last start peak current
Pre trip Power
Fault status
RTD4
RTD5
Dip Switch
Average Power
Power Factor
Power VA
18. Changes To The Manual.
From Issue G.
Undercurrent is clarified, a new lower limit of 5%.
From Issue F.
Earth Fault Display lower range is noted. (Section 5.4.)
Accuracy of Power for small motors is noted. (Section 5.6.)
Fast Scan Update Time Added. (Section 9.1.)
From Issue E
Clarification of the external instrumental earthing inputs on pins 11,12,54. Notes are changed in section 4., 5., and 14.
From Issue D
FLC changed to Inom with respect to Earth Fault Trip and Alarm
Power Indication is now no longer an option.
5th RTD channels Pin Out Numbers changed from 52, 53 and 51 to 53,51 and 52.
Issue I 29/08/03
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MPR2000