Download Protection components

Protection components
Characteristics :
pages 28301/2, 28301/3 and 28306/3
References :
page 28306/4
Scheme, dimensions :
page 28306/5
Measurement and control relays
3-phase supply control relays RM3-TG2
General
Functions
This device monitors the rotational direction of the phases in a 3-phase supply and detects the complete failure of one
or more of the phases.
Applications :
i Connection of moving equipment :
- site equipment (cranes, pumps, conveyors, etc.),
- agricultural equipment,
- refrigerated trucks.
i Protection of persons and equipment against the consequences of reverse running :
- lifting, handling, elevators, escalators, etc.
i Control of sensitive 3-phase supplies.
RM3-TG2
Presentation
Width 22.5 mm
R Yellow LED : indicates relay state.
Te
RM3 TG2
L1
L2
L3
16
15 18
26
25 28
R
Operating principle
The voltage of the supply to be monitored, connected to terminals L1, L2, L3 of the relay, also provides its power supply.
Monitoring rotational direction of phases :
In normal operation, the output relay is energised, the yellow LED is on. If a fault occurs - reversal in rotational direction
of phases, the relay is de-energised (or cannot energise at switch-on) and the yellow LED goes out.
Detection of phase failure :
The RM3-TG2 continually measures each voltage between the terminals L1L2, L2L3 and L1L3. In the event of 2 or 3
phases failing, the output relay de-energises (or cannot energise at switch-on) and the yellow LED goes out.
In the event of 1 phase failing, a voltage greater than the detection threshold (60 V) can be generated back through the
control circuit thus preventing detection of the phase failure. For this reason, it is recommended that RM3-TA or RM3TAR relays be used for detection of a single phase failure.
Functional diagram
L1, L2, L3
L1, L2, L3
11/15-14/18
11/15-12/16
Relay
21/25-24/28
21/25-22/26
28306/2
Te
L1, L3, L2
L1, L2, L3
L2, L3
L1
Protection components
General :
page 28306/2
References :
page 28306/4
Scheme, dimensions :
page 28306/5
Measurement and control relays
3-phase supply control relays RM3-TG2
Characteristics
Control and supply circuit characteristics
Rated supply voltage (Un)
c 50-60 Hz
V
200...500
Average consumption at Un
Phases L1, L2 c
VA
2.2…12.5
Output relay and operating characteristics
Number of C/O contacts
2
Output relay state
Energised during fault free operation
De-energised or unable to energise on detection of rotational direction fault or
phase failure
Rated operational voltage
(switching)
V
250
Conventional thermal current
A
4
A
1.5
Rated breaking capacity
AC-15, 220 V
Time delay
Operating status indication
None
Yellow LED on
Relay energised
Te 2 8 3 0 6 / 3
Protection components
General :
page 28306/2
Characteristics :
pages 28301/2, 28301/3 and 28306/3
Scheme, dimensions :
page 28306/5
Measurement and control relays
3-phase supply control relays RM3-TG2
References
Time delay
Reference
s
Control and
supply voltage
c 50-60 Hz
V
None
200...500
RM3-TG201MS7
Accessory
RM3-TG2
LA9-RE02
28306/4
Te
Weight
kg
0.165
(to be ordered separately)
Description
Reference
Weight
kg
Sealing cover
width 22.5 mm
LA9-RE02
0.003
Protection components
General :
page 28306/2
Characteristics :
pages 28301/2, 28301/3 and 28306/3
References :
page 28306/4
Measurement and control relays
3-phase supply control relays RM3-TG2
Scheme, dimensions, setting-up
28
18
15
L2
L3
25
26
16
21/25
L1
24/28
22/26
12/16
L1
14/18
11/15
L3
L2
L1
Scheme, connection
RM3-TG2
L2
L3
22/26 21/25 24/28
12/16 11/15 14/18
From
November 1998
L1, L2, L3
Supply voltage
Connection and voltage values to be controlled
L1, L2, L3
3-phase voltages to be controlled
(see table opposite)
RM3-TG2
L1-L2-L3
200…500 V (50-60 Hz)
st
11/15-14/18
11/15-12/16
1 C/O contact of output relay
21/25-24/28
21/25-22/26
2nd C/O contact of output relay
77,5
Dimensions
100
22,5
Setting-up
For a voltage equal to or greater than 415 V, a minimum distance of 10 mm must be left between relays if several are mounted side by side.
Te 2 8 3 0 6 / 5