Download - Schneider Electric

CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
PROTECTIVE RELAY - MEDIUM VOLTAGE
PART 1 CURRENT OR VOLTAGE INPUT RELAY (SERIES 20)
1.01
1.02
1.03
1.04
1.05
1.06
GENERAL
PROTECTION
MEASUREMENT
DIAGNOSTICS
CONTROL
COMMUNICATIONS
PART 2 CURRENT AND VOLTAGE INPUT RELAY (SERIES 40)
2.01
2.02
2.03
2.04
2.05
2.06
GENERAL
PROTECTION
MEASUREMENT
DIAGNOSTICS
CONTROL
COMMUNICATIONS
PART 3 CURRENT AND VOLTAGE INPUT RELAY (SERIES 80)
3.01
3.02
3.03
3.04
3.05
3.06
GENERAL
PROTECTION
MEASUREMENT
DIAGNOSTICS
CONTROL
COMMUNICATIONS
Page 1 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
PROTECTIVE RELAY - MEDIUM VOLTAGE
PART 1 CURRENT OR VOLTAGE INPUT RELAY (SERIES 20)
1.01 GENERAL
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
O.
The Protection and Control unit shall include an LCD display unit for User Machine Interface (UMI) that indicates:
measurement values, operating messages, and device maintenance messages. The display indication shall be visible
from at least two meters distance. The display unit shall have, as a minimum, 4 lines for clear annunciation of alarm
conditions.
The Protection and Control unit shall include a keypad to select the following operations: display of metering and operating
data, alarm messages, clearing of alarms and resetting, acknowledgement, and access to protection and other relay
settings.
Access to Protection setting mode shall be protected by a personal customized password of at least 4 characters; access
to Parameter setting mode by a second password of 4 characters.
All functions and displays of the UMI shall be remotely accessible (from the most advantageous location for operation and
monitoring).
The Protection and Control unit should be compact - reduced depth (<4 inches) - and easy to install - remote option
modules pre-wired.
The unit shall have screw terminals for connection of wires using ring terminal lugs for all CT (or VT) inputs, control power
input, and trip outputs.
Appropriate software (using standard Windows 95/98/2000/NT/XP operating system) shall allow the collection of:
1. All metering and operating data, alarm messages
2. Fault recording: single or multi-curve display, 2 pointers for differential measurement, zooming, printing.
3. Breaker diagnostics data (cumulative tripping current, operations counter…)
4. Protection and parameter settings;
5. Logic status of inputs, outputs, and signal LEDs. (download to/from the relay)
The Protection and Control unit shall have at least four logic outputs. Extension of the number of logic inputs and outputs
shall be possible up to 10 inputs and 8 outputs.
One analog output and eight temperature sensor inputs shall be available as an extension to the Protection and Control
unit. (Transformer and motor applications).
The Protection and Control unit shall meet the applicable IEEE/ IEC design standards.
The operating temperature range shall be at least -25°C to + 70° C.
The Protection and Control unit range shall be designed to accommodate a wide range of control power supply voltages:
24, 48, 125, 250 Vdc, & 120, 240 Vac without regard to catalog number nor recourse to jumpering.
The Protection and Control unit shall be UL Recognized (UR) in U.S. and Canada..
The design and manufacturing process shall be ISO 9001 certified.
The output relays shall be capable of withstanding steady state current of 8 A at the rated control voltage.
1.02 PROTECTION
A.
B.
C.
The Protection and Control Unit shall contain all the necessary protection functions for the specific application:
1. Substation/Feeder protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable
second harmonic restraint, (46) Unbalance / negative sequence overcurrent, and (79) Recloser (4 steps);
2. Transformer protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (46) Unbalance / negative sequence overcurrent, (49 RMS) thermal overload, (49/63)Thermostat /
Buchholz (gas detection/pressure), and optional (49)Temperature (RTD) monitoring;
3. Motor protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (46) Unbalance / negative sequence overcurrent, (49 RMS) Thermal overload, (37) Phase
undercurrent, (48/51LR) Excessive starting time/ locked rotor, (66) Excessive Starts per hour, and optional
(38/49)Temperature (RTD) monitoring;
4. Voltage network protection (busbar): (27D/47) Positive sequence undervoltage, (27R) Remanent undervoltage, (27)
Phase to Phase undervoltage, (27S) Phase to Neutral undervoltage, (59) Phase-to-Phase overvoltage, (59N) neutral
voltage displacement, (81H) Overfrequency, (81L) Underfrequency.
5. Loss of mains protection (busbar): same voltage and frequency elements as Voltage network protection (busbar) plus
(81R) Rate of Change of frequency
Each overcurrent protection device shall have a wide range of time overcurrent protection curve settings, providing a
choice of curve types:
1. IEEE Moderately/Very/Extremely Inverse time;
2. IEC Standard (SIT))/Very (VIT)/Long Time(LTI)/Extremely (EIT) Inverse Time;
3. IAC Inverse(I)/ Very Inverse (VI)/ Extremely Inverse (EI) time;
4. Standard(SIT)/Very(VIT)/Long Time(LTI)/Extremely(EIT) /Rapid (RI) Inverse time
5. Ultra Inverse Time (UIT) – for better fuse co-ordination; and
Definite time (DT) with time delay settings from Instantaneous (50 ms) to 300 s. Overload protection shall use true RMS
current value (up to a minimum 13th harmonic) and will compensate for changes in ambient temperature (optional).
Page 2 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
D.
E.
F.
G.
H.
Alternative overload setting groups will be selectable by logical conditions to adapt operating mode change. Adjustment of
the overload tripping curves will be possible to exactly fit the motor characteristics.
Overcurrent setting shall be made by the direct input of actual primary current values.
Phase overcurrent and ground fault protection shall have an adjustable timer hold (time delay reset) to allow recurring
faults detection. The protection shall also allow a current-dependent time reset to emulate e/m relays.
Ground fault protection shall integrate a second harmonic restraint, which can be inhibited or activated via software.
The unit shall allow for the use of zone-selective protection via logic I/O and settings.
The relay shall allow fast change in protection scheme: 2 groups of 50/51 and 50N/51N settings shall be available with
provision for shifting from one group of settings to the other by a digital input, UMI, and communications.
1.03 MEASUREMENT
A.
B.
Each Protection and Control unit shall perform the measurements needed for operation and commissioning, i.e. at least the
following - for feeder, transformer and motor applications:
1. True RMS 3-Phase current
2. Residual current
3. Maximum phase current demand
4. Fault current in each phase
5. Additional measurements such as unbalance current ratio, thermal capacity used, etc.
If required by the application, the unit shall include voltage and frequency or may be combined with an external Metering
device to allow the following power management features:
1. Real time readings: Amps. Volts, kW, kVAR, kVA
2. Energy readings: kWh, kVARh, kVAh, Accumulated energy
3. Demand, Minimum/maximum readings
4. Frequency for each phase of current/voltage
5. Date/time stamping
6. On-Board Data Logging
1.04 DIAGNOSTICS
A.
B.
C.
D.
An LED and text indicating the cause of the fault shall be located on the front of the device. Nine signal LEDs shall be
available for alarms and status including breaker position (open/close), relay self-test, phase fault and ground fault alarms.
It shall be possible to customize the assignment of the signal LEDs.
Fault recording within the Protection and Control unit shall:
1. Be triggered automatically on event, or manually via communications or from the Protection and Control Unit front
panel;
2. Have each record store data for at least 80 cycles, 12 samples per cycle, with a selectable number of cycles before
the event configurable
3. Include on each record, as a minimum, the date, channel characteristics, 4 current channels (I1, I2, I3, I0) and the
change of status of the digital inputs
4. Be capable of recording a minimum of 2 faults.
The unit shall provide storage of at least 60 events time tagged within an accuracy of 1ms.
The Protection and Control unit shall include:
1. An internal function self-monitoring mechanism, which activates one fail-safe watchdog changeover contact
2. An automatic device for switching to the fail-safe mode, disabling output controls when a major internal failure is
detected
3. Indication of self test status of the device by LED and text.
1.05 CONTROL
A.
The Protection and Control unit shall include the logic inputs and outputs required for control of the interrupting devices
(circuit-breaker or contactor) and for interfacing with the monitoring or logic process:
1. CB open and close control, whatever the type of shunt trip or undervoltage release coil control
2. ANSI 69 / Inhibit closing
3. Remote tripping
4. As an option, monitoring of the circuit breaker for maintenance statistics purposes: operating time, charging time, trip
circuit supervision (covering power supply, wiring and coil) cumulative total of tripping currents for 5 current ranges,
operation counter, pressure (for SF6 circuit breakers)
5. As an option, monitoring the temperature via RTDs (motors, transformers)
6. Retention of stored information (even during control power supply outages).
1.06 COMMUNICATIONS
A.
The Protection unit shall have optional 2-wire/4-wire RS 485 Modbus Communication electrical interface or
dual 820 nM radial optical fiber interface, up to 38,400-baud speed, allowing access to metering data, protection
settings readouts, and the fault record data. The unit shall be compatible with PowerLogic System Manager TM Software
(SMS) for central management of the electrical power system.
Page 3 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
B.
C.
The response time for control commands shall be less than 15 ms (time from order sent to the unit until order
acknowledgement).
A RS232 connection port shall be available in the front of the relay, allowing communicating between the relay and a PC
with the appropriate software.
Page 4 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
PART 2 CURRENT AND VOLTAGE INPUT RELAY (SERIES 40)
2.01 GENERAL
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
O.
P.
The Protection and Control unit shall include an LCD display unit for User Machine Interface (UMI) that indicates:
measurement values, operating messages, and device maintenance messages. The display indication shall be visible
from at least two meters distance. The display unit shall have, as a minimum, 4 lines for clear annunciation of alarm
conditions.
The Protection and Control unit shall include a keypad to select the following operations: display of metering and operating
data, alarm messages, clearing of alarms and resetting, acknowledgement, and access to protection and other relay
settings.
Access to Protection setting mode shall be protected by a personal customized password of at least 4 characters; access
to Parameter setting mode by a second password of 4 characters.
All functions and displays of the UMI shall be remotely accessible (from the most advantageous location for operation and
monitoring).
The Protection and Control unit should be compact - reduced depth (<4 inches) - and easy to install - remote option
modules pre-wired.
The unit shall have screw terminals for connection of wires using ring-terminal lugs for all CT/VT inputs, main control power
input, and trip outputs.
Appropriate software (using standard Windows 95/98/2000/NT/XP operating system) shall allow the collection of:
1. All metering and operating data, alarm messages
2. Fault recording: single or multi-curve display, 2 pointers for differential measurement, zooming, printing.
3. Breaker diagnostics data (cumulative tripping current, operations counter…)
4. Protection and parameter settings;
5. Logical status of inputs, outputs, and signal LEDs. (download to/from the relay)
The Protection and Control unit shall have at least four logic outputs. Extension of the number of logic inputs and outputs
shall be possible up to 10 inputs and 8 outputs.
One analog output and/or eight temperature sensor inputs (or sixteen temperature sensor inputs) shall be available as an
extension to the Protection and Control unit. (Transformer and motor applications).
It should be possible to withdraw the unit without prior current circuit short-circuiting.
The Protection and Control unit shall meet the applicable IEEE/ IEC design standards.
The operating temperature range shall be at least -25°C to + 70° C.
The Protection and Control unit range shall be designed to accommodate a wide range of control power supply voltages:
24, 48, 125, 250 Vdc, & 120, 240 Vac without regard to catalog number nor recourse to jumpering.
The Protection and Control unit shall be UL Recognized (UR) in US and Canada.
The design and manufacturing process shall be ISO 9001 certified.
The output relays shall be capable of withstanding steady state current of 8 A at the rated control voltage.
2.02 PROTECTION
A.
B.
The Protection and Control Unit shall contain all the necessary protection functions for the specific application:
1. Substation/Feeder protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable
second harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (67) Directional
overcurrent, (67N/67NC) Directional ground fault, (32P) Reverse real power, (27) Undervoltage (phase-to-phase or
phase-to-neutral), (59) Overvoltage (phase-to-phase or phase-to-neutral), (59N) Neutral voltage displacement, (47)
Negative sequence overvoltage, (81H) Overfrequency, (81L) Underfrequency, and (79) Recloser (4 steps);
2. Transformer protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (67) Directional
overcurrent, (67N/67NC) Directional ground fault, (49 RMS) thermal overload, (27) Undervoltage (phase-to-phase or
phase-to-neutral), (59) Overvoltage (phase-to-phase or phase-to-neutral), (59N) Neutral voltage displacement, (47)
Negative sequence overvoltage, (81H) Overfrequency, (81L) Underfrequency, (49/63) Thermostat / Buchholz (gas
detection/pressure), and optional (49) Temperature (RTD) monitoring;
3. Motor protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (67N/67NC) Directional
ground fault, (49 RMS) thermal overload, (27) Undervoltage (phase-to-phase or phase-to-neutral), (59) Overvoltage
(phase-to-phase or phase-to-neutral), (59N) Neutral voltage displacement, (47) Negative sequence overvoltage, (81H)
Overfrequency, (81L) Underfrequency, (32P) Reverse real power, (32Q/40) Reverse reactive power/ Loss-ofexcitation, (27D) Positive Sequence Undervoltage, (27R) Remanent Undervoltage, (37) Phase undercurrent,
(48/51LR) Excessive starting time/ locked rotor, (66) Excessive Starts per hour, and optional (38/49)Temperature
(RTD) monitoring;
4. Generator protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (49 RMS) thermal
overload, (27) Undervoltage (phase-to-phase or phase-to-neutral), (59) Overvoltage (phase-to-phase or phase-toneutral), (59N) Neutral voltage displacement, (47) Negative sequence overvoltage, (81H) Overfrequency, (81L)
Underfrequency, (32P) Reverse real power, (32Q/40) Reverse reactive power/ Loss-of-excitation, (50V/51V) Voltagerestrained Overcurrent, and optional (38/49)Temperature (RTD) monitoring
Each overcurrent protection device shall have a wide range of time overcurrent protection curve settings, providing a
choice of curve types:
Page 5 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
C.
D.
E.
F.
G.
H.
1. IEEE Moderately/Very/Extremely Inverse time;
2. IEC Standard (SIT))/Very (VIT)/Long Time(LTI)/Extremely (EIT) Inverse Time;
3. IAC Inverse(I)/ Very Inverse (VI)/ Extremely Inverse (EI) time;
4. Standard(SIT)/Very(VIT)/Long Time(LTI)/Extremely(EIT) /Rapid (RI) Inverse time
5. Ultra Inverse Time (UIT) – for better fuse co-ordination; and
6. Definite time (DT) with time delay settings from Instantaneous (50 ms) to 300 s.
Overload protection shall use true RMS current value (up to a minimum 13th harmonic) and will compensate for changes in
ambient temperature (optional). Alternative overload setting groups will be selectable by logical conditions to adapt
operating mode change. Adjustment of the overload tripping curves will be possible to exactly fit the motor characteristics.
Overcurrent setting shall be made by the direct input of actual primary current values.
Phase overcurrent and ground fault protection shall have an adjustable timer hold (time delay reset) to allow recurring
faults detection. The protection shall also allow a current-dependent time reset to emulate e/m relays.
Ground fault protection shall integrate a second harmonic restraint, which can be inhibited or activated via software.
The unit shall allow for the use of zone-selective protection via logic I/O and settings.
The relay shall allow fast change in protection scheme: two groups of 50/51, 50N/51N, 67/67N settings shall be available
with provision for shifting from one group of settings to the other by a digital input, UMI, and communications.
2.03 MEASUREMENT
A.
B.
Each Protection and Control unit shall perform the measurements needed for operation and commissioning, i.e. at least the
following - for feeder, transformer motor and generator applications:
1. True RMS 3-Phase current
2. Residual current
3. Average and Maximum phase current demand
4. Fault current in each phase
5. Measurement of voltage, frequency, power and energy.
6. For power and energy data, the unit shall measure real and reactive values and takes into consideration the direction
of energy flow.
7. Four logic inputs shall optionally allow energy measurement by external impulses
8. Additional measurements such as unbalance current ratio, thermal capacity used, etc.
If required by the application, the unit shall include voltage, frequency and energy measurements or may be combined with
an external Metering device to allow power management features:
1. Real time readings: Amps. Volts, kW, kVAR, kVA
2. Energy readings: kWh, kVARh, kVAh, Accumulated energy
3. Demand, Minimum/maximum readings
4. Frequency for each phase of current/voltage
5. Date/time stamping
6. On-Board Data Logging
2.04 DIAGNOSTICS
A.
B.
C.
D.
E.
An LED and text indicating the cause of the fault shall be located on the front of the device. Nine signal LEDs shall be
available for alarms and status including breaker position (open/close), relay self-test, phase fault and ground fault alarms.
It shall be possible to customize the assignment of the signal LEDs.
Fault recording within the Protection and Control unit shall:
1. Be triggered automatically on event, or manually via communications or from the Protection and Control Unit front
panel;
2. Have configurable record storage of data from 15 records of at least 1 second each to 1 record of 8 seconds, 12
samples per cycle, with a selectable number of cycles before the event configurable;
3. Include on each record, as a minimum, the date, channel characteristics, 4 current channels (I1, I2, I3, I0), 3 voltage
channels, and the change of status of the digital inputs and base digital outputs;
4. Be capable of recording a minimum of 16 seconds at 60 Hz.
The unit shall provide storage of at least 200 events time tagged within an accuracy of 1ms.
The Protection and Control unit shall include:
1. An internal function self-monitoring mechanism, which activates one fail-safe watchdog changeover contact;
2. An automatic device for switching to the fail-safe mode, disabling output controls when a major internal failure is
detected;
3. Indication of self test status of the device by LED and text.
The protection and control unit shall include VT and CT circuit supervision.
2.05 CONTROL
A.
The Protection and Control unit shall include the logic inputs and outputs resources required for control of the interrupting
devices (circuit-breaker or contactor) and for interfacing with the monitoring or logic process:
1. CB open and close control, whatever the type of shunt trip or undervoltage release coil control
2. ANSI 69 / Inhibit closing
3. Remote tripping
4. Modification of the control logic program by using logic equation editor;
Page 6 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
5.
6.
7.
As an option, monitoring of the circuit breaker for maintenance statistics purposes: operating time, charging time, trip
circuit supervision (covering power supply, wiring and coil) cumulative total of tripping currents for 5 current ranges,
operation counter, pressure (for SF6 circuit breakers)
As an option, monitoring the temperature via RTDs (motors, transformers)
Retention of stored information (even during control power supply outages).
2.06 COMMUNICATIONS
A.
B.
C.
D.
The Protection unit shall have optional 2-wire/4-wire RS 485 Modbus Communication electrical interface or
dual 820 nM radial optical fiber interface, up to 38,400-baud speed, allowing access to metering data, protection
settings readouts, and the fault record data. The unit shall be compatible with PowerLogic System Manager TM Software
(SMS) for central management of the electrical power system.
The response time for control commands shall be less than 15 ms (time from order sent to the unit until order
acknowledgement).
A RS232 connection port shall be available in the front of the relay, allowing communicating between the relay and a PC
with the appropriate software.
Remote control orders shall be carried out in two modes: Direct mode or "SBO" (select before operate) mode.
Page 7 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
PART 3 CURRENT AND VOLTAGE INPUT RELAY (SERIES 80)
3.01
GENERAL
A. The Protection and Control unit shall include an LCD display unit for User Machine Interface (UMI) that indicates:
measurement values, operating messages, and device maintenance messages. The display indication shall be visible
from at least two meters distance. The display unit shall have, as a minimum, 4 lines for clear annunciation of alarm
conditions.
B. The Protection and Control unit shall include a keypad to select the following operations: display of metering and operating
data, alarm messages, clearing of alarms and resetting, acknowledgement.
C. All functions and displays of the UMI shall be remotely accessible (from the most advantageous location for operation and
monitoring). For some applications, the possibility to view status of system devices on an animated mimic and vector
diagram (via software or UMI) and to control locally the closing and the opening of these system devices shall be possible
D. The Protection and Control unit should be compact - reduced depth (<8.5 inches) - and easy to install - remote option
modules pre-wired.
E. The unit shall have screw terminals for connection of wires using ring-terminal lugs for all CT/VT inputs, main control power
input, and trip outputs.
F. Appropriate software (using standard Windows 95/98/2000/NT/XP operating system) shall allow the collection of:
1. All metering and operating data, alarm messages
2. Fault recording: single or multi-curve display, 2 pointers for differential measurement, zooming, printing.
3. Breaker diagnostics data (cumulative tripping current, operations counter…)
4. Protection and parameter settings;
5. Logical status of inputs, outputs, and signal LEDs. (download to/from the relay)
G. Access to Protection setting mode shall be protected by a personal customized password of at least 4 characters; access to
Parameter setting mode by a second password of 4 characters.
H. The Protection and Control unit shall have at least five logic outputs. Extension of the number of logic inputs and outputs
shall be possible up to 42 opto-isolated logic inputs and 23 relay outputs
I. One analog output and/or eight Resistance Temperature Detector (RTD) inputs (or sixteen RTD inputs) shall be available as
an extension to the Protection and Control unit. (Transformer, generator, and motor applications).
J. It should be possible to withdraw the unit without prior current circuit short-circuiting. In case of product servicing, it will be
possible to transfer customer applications and event log on the new product without any additional downloading
K. The Protection and Control unit shall meet the applicable IEEE/ IEC design standards.
L. The operating temperature range shall be at least -25°C to + 70° C.
M.The Protection and Control unit range shall be designed to accommodate a wide range of control power supply voltages: 24,
48, 125, 250 Vdc without regard to catalog number nor recourse to jumpering.
N. The Protection and Control unit shall be UL Recognized (UR) in US and Canada.
O. The design and manufacturing process shall be ISO 9001 certified.
P. The output relays shall be capable of withstanding steady state current of 8 A at the rated control voltage.
3.02
A.
PROTECTION
The Protection and Control Unit shall contain all the necessary protection functions for the specific application:
1. Substation/Feeder protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable
second harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (49 RMS) thermal
overload, (67) Directional overcurrent, (67N/67NC) Directional ground fault, (32P) Reverse real power, (37P)
Directional active underpower, (25) Synch-check, (27) Undervoltage (phase-to-phase or phase-to-neutral), (27D)
Positive sequence undervoltage , (27R) remanent undervoltage, (59) Overvoltage (phase-to-phase or phase-toneutral), (59N) Neutral voltage displacement, (47) Negative sequence overvoltage, (81H) Overfrequency, (81L)
Underfrequency, (81R) Rate of change of frequency (df/dt), and (79) Recloser (4 steps);
2. Transformer protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (67) Directional
overcurrent, (67N/67NC) Directional ground fault, (32P) Reverse real power (49 RMS) thermal overload, (24)
Volts/Hertz, (25) Synch –check, (27) Undervoltage (phase-to-phase or phase-to-neutral), (27D) Positive sequence
undervoltage , (27R) remanent undervoltage, (59) Overvoltage (phase-to-phase or phase-to-neutral), (59N) Neutral
voltage displacement, (47) Negative sequence overvoltage, (81H) Overfrequency, (81L) Underfrequency, (64 REF)
restricted earth fault (87T) 2 windings current differential, (26/63) Thermostat / Buchholz (gas detection/pressure), and
optional (38/49T) Temperature (RTD) monitoring;
3. Motor protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (67N/67NC) Directional
ground fault, (49 RMS) thermal overload, (27) Undervoltage (phase-to-phase or phase-to-neutral), (59) Overvoltage
(phase-to-phase or phase-to-neutral), (59N) Neutral voltage displacement, (47) Negative sequence overvoltage, (81H)
Overfrequency, (81L) Underfrequency, (32P) Reverse real power, (32Q/40) Reverse reactive power/ Loss-ofexcitation, (40) Field Loss (underimpedance), (27D) Positive Sequence Undervoltage, (27R) Remanent Undervoltage,
(37) Phase undercurrent, (48/51LR) Excessive starting time/ locked rotor, (66) Excessive Starts per hour, (12/14)
Over/Under Speed, (78) Pole Slip, (87M) current differential and optional (38/49)Temperature (RTD) monitoring;
4. Generator protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second
harmonic restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (67) Directional
overcurrent, (67N/67NC) Directional ground fault, (49 RMS) thermal overload, (40) Field Loss (underimpedance) , (24)
Page 8 of 10
CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
B.
C.
D.
E.
F.
G.
H.
Volts/Hertz, (25) Synch-check, (27) Undervoltage (phase-to-phase or phase-to-neutral), (59) Overvoltage (phase-tophase or phase-to-neutral), (59N) Neutral voltage displacement, (27D) Positive sequence undervoltage , (27R)
remanent undervoltage, (47) Negative sequence overvoltage, (81H) Overfrequency, (81L) Underfrequency, (32P)
Reverse real power, (32Q/40) Reverse reactive power/ Loss-of-excitation, (37P) Directional Active Underpower, (21G)
Backup underimpedance, (50V/51V) Voltage-restrained Overcurrent, (12/14) Over/Under Speed, (50/27) Inadvertent
energization, (64G /27TN )100% stator earth fault, (78) Pole Slip, (64 REF) restricted earth fault, (87M) current
differential, (26/63) Thermostat / Buchholz (gas detection/pressure), and optional (38/49)Temperature (RTD)
monitoring.
5. Bus protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable second harmonic
restraint, (50BF) Breaker failure, (46) Unbalance / negative sequence overcurrent, (25) Synch-check, (27)
Undervoltage (phase-to-phase or phase-to-neutral), (27D) Positive sequence undervoltage , (27R) remanent
undervoltage, (59) Overvoltage (phase-to-phase or phase-to-neutral), (59N) Neutral voltage displacement, (47)
Negative sequence overvoltage, (81H) Overfrequency, (81L) Underfrequency.
6. Capacitor bank protection: (50/51) Three Phase overcurrent, (50N/51N) Ground fault (or neutral) with selectable
second harmonic restraint, (50BF) Breaker failure, (51C) Capacitor bank unbalance, (46) Unbalance / negative
sequence overcurrent, (49RMS) Thermal overload for capacitors, (25) Synch-check, (27) Undervoltage (phase-tophase or phase-to-neutral), (27D) Positive sequence undervoltage , (27R) remanent undervoltage, (59) Overvoltage
(phase-to-phase or phase-to-neutral), (59N) Neutral voltage displacement, (47) Negative sequence overvoltage, (81H)
Overfrequency, (81L) Underfrequency.
Each overcurrent protection device shall have a wide range of time overcurrent protection curve settings, providing a
choice of curve types:
1. IEEE Moderately/Very/Extremely Inverse time;
2. IEC Standard (SIT))/Very (VIT)/Long Time(LTI)/Extremely (EIT) Inverse Time;
3. IAC Inverse(I)/ Very Inverse (VI)/ Extremely Inverse (EI) time;
4. Standard(SIT)/Very(VIT)/Long Time(LTI)/Extremely(EIT) /Rapid (RI) Inverse time
5. Ultra Inverse Time (UIT) – for better fuse co-ordination;
6. Custom curve family, user-defined by up to 30 coordinate points, and
7. Definite time (DT) with time delay settings: Instantaneous; from 50 ms to 300 s.
Overload protection shall use true RMS current value (up to a minimum 13th harmonic) and will compensate for changes in
ambient temperature (optional). Alternative overload setting groups will be selectable by logical conditions to adapt
operating mode change. Adjustment of the overload tripping curves will be possible to exactly fit the motor characteristics.
Overcurrent setting shall be made by the direct input of actual primary current values.
Inverse TOC Phase settings shall be from 5 to 240 % of CT primary (5 to 2400% for definite time phase)
Inverse TOC Ground settings shall be from 1 to 100 % of CT primary (1 to 1500% for definite time ground)
Minimum primary ground fault current shall be 0.1 A.
Phase overcurrent and ground fault protection shall have an adjustable timer hold (time delay reset) to allow recurring
faults detection. The protection shall also allow a current-dependent time reset to emulate e/m relays.
Ground fault protection shall integrate a second harmonic restraint, which can be inhibited or activated via software.
The unit shall allow for the use of zone-selective protection via logic I/O and settings.
The relay shall allow fast change in protection scheme: two groups of 50/51, 50N/51N, 67/67N settings shall be available
with provision for shifting from one group of settings to the other by a digital input, UMI, and communcations.
3.03 MEASUREMENT
A.
B.
Each Protection and Control unit shall perform the measurements needed for operation and commissioning, i.e. at least the
following - for feeder, transformer motor and generator applications:
1. True RMS 3-Phase current
2. Residual current
3. Average and Maximum phase current demand
4. Fault current in each phase
5. Measurement of voltage, frequency, power and energy. For power and energy data, the unit shall measure real and
reactive values and takes into consideration the direction of energy flow.
6. Four logic inputs shall optionally allow energy measurement by external impulses
7. Additional measurements such as unbalance current ratio, thermal capacity used, etc.
8. Total harmonic Distortion (THD) factors for current and voltage.
If required by the application, the unit shall include voltage, frequency and energy measurements or may be combined with
an external Metering device to allow power management features:
1. Real time readings: Amps. Volts, kW, kVAR, kVA
2. Energy readings: kWh, kVARh, kVAh, Accumulated energy
3. Demand, Minimum/maximum readings
4. Frequency for each phase of current/voltage
5. Date/time stamping
6. On-Board Data Logging
3.04 DIAGNOSTICS
A.
An LED and text indicating the cause of the fault shall be located on the front of the device. Nine signal LEDs shall be
available for alarms and status including breaker position (open/close), relay self-test, phase fault and ground fault alarms.
It shall be possible to customize the assignment of the signal LEDs.
B. Fault recording within the Protection and Control unit shall:
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CSI Specification Number: 26 09 13.70
Product Name: PROTECTIVE RELAYS - MEDIUM VOLTAGE
1.
C.
D.
E.
Be triggered automatically on event, or manually via communications or from the Protection and Control Unit front
panel;
2. Have configurable record storage of data from 17 records of at least 1 second each to 1 record of 9 seconds at 12
samples per cycle(3 sec at 36 samples per cycle), with a selectable number of cycles before the event configurable(up
to 90 cycles);
3. Include in each record, as a minimum, the date, channel characteristics, 8 current channels (I1, I2, I3, I0), 4 voltage
channels, and the change of status of the digital inputs and digital outputs;
4. Be capable of recording a minimum of 18 seconds at 60 Hz.
The unit shall provide storage of at least 200 events time tagged within an accuracy of 1ms.
The Protection and Control unit shall include:
1. An internal function self-monitoring mechanism, which activates one fail-safe watchdog changeover contact;
2. An automatic device for switching to the fail-safe mode, disabling output controls when a major internal failure is
detected;
3. Indication of self test status of the device by LED and text.
The protection and control unit shall include VT and CT circuit supervision.
3.05 CONTROL
A.
The Protection and Control unit shall include the logic inputs and outputs resources required for control of the interrupting
devices (circuit-breaker or contactor) and for interfacing with the monitoring or logic process:
1. CB open and close control, whatever the type of shunt trip or undervoltage release coil control
2. ANSI 69 / Inhibit closing
3. Remote tripping
4. Adaptation of predefined control and monitoring functions, or programming specific control and monitoring functions
5. As an option, monitoring of the circuit breaker for maintenance statistics purposes: operating time, charging time, trip
circuit supervision (covering power supply, wiring and coil), cumulative total of tripping currents for 5 current ranges,
operation counter, pressure (for SF6 circuit breakers)
6. As an option, monitoring the temperature via RTDs (motors, transformers)
7.
B.
C.
Retention of stored information (even during control power supply outages).
Predefined control and monitoring functions shall be adapted by using a boolean editor including timers, counters
For some needs (complex applications like specific automatic transfer functions, motor starting sequences….), a ladderlanguage programming software shall be used to program specific control and monitoring functions
3.06 COMMUNICATIONS
A.
The Protection unit shall have optional 2-wire/4-wire RS 485 Modbus Communication electrical interface or
dual 820 nM radial optical fiber interface, up to 38,400-baud speed, allowing access to metering data, protection
settings readouts, and the fault record data. The unit shall be compatible with PowerLogic System Manager
(SMS) for central management of the electrical power system.
TM
Software
B. The response time for control commands shall be less than 15 ms (time from order sent to the unit until order
acknowledgement).
C. Relay shall be able to connect to Ethernet gateway.
D. A RS232 connection port shall be available in the front of the relay, allowing communicating between the
relay and a PC with the appropriate software.
E. Remote control orders shall be carried out in two modes: Direct mode or "SBO" (select before operate) mode.
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