ABB Relion 650 Series Applications Manual page 115

1MRK 505 287-UUS B
9.2 Breaker close/trip circuit monitoring TCSSCBR
9.2.1 Identification
Function description
Breaker close/trip circuit monitoring
9.2.2 Application
TCSSCBR detects faults in the electrical control circuit of the circuit breaker. The function can
supervise both open and closed coil circuits. This kind of monitoring is necessary to find out the
vitality of the control circuits continuously.
The following figure shows an application of the trip-circuit monitoring function usage. The best
solution is to connect an external R
contact. Although the circuit breaker internal contact is open, TCSSCBR can see the trip circuit
through R
resistance remains small, that is, it does not harm or overload the circuit breaker's trip coil.
Busbar protection REB650
Application manual
Trip circuit supervision generates a current of approximately 1.0 mA through the
supervised circuit. It must be ensured that this current will not cause a latch up of
the controlled object.
To protect the trip circuit supervision circuits in the IED, the output contacts are
provided with parallel transient voltage suppressors. The breakdown voltage of
these suppressors is 400 +/– 20 V DC.
. The R resistor should have such a resistance that the current through the
ext ext
© Copyright 2013 ABB. All rights reserved
IEC 61850 IEC 60617
identification identification
TCSSCBR -
shunt resistor in parallel with the circuit breaker internal
ext
Secondary system supervision
GUID-6D9DE533-EC57-4517-955E-075851E1C89A v1
GUID-C6367ACC-A594-4C2C-B75A-8A62387117BB v5
ANSI/IEEE C37.2
device number
-
GUID-D28727C2-FF93-4E3A-BD92-9B85D1F653DC v10.1.1
Section 9
109