Information List; Trip Circuit Supervision 74Tc - Siemens siprotec SJ62 User Manual

2 Functions

2.11.1.8 Information List

No. Information
161 Fail I Superv.
Failure Σ I
162
163 Fail I balance
167 Fail V balance
169 VT FuseFail>10s
170 VT FuseFail
171 Fail Ph. Seq.
175 Fail Ph. Seq. I
176 Fail Ph. Seq. V
197 MeasSup OFF
6509 >FAIL:FEEDER VT
6510 >FAIL: BUS VT

2.11.2 Trip Circuit Supervision 74TC

Applications
Prerequisites
193
Type of In-
formation
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
SP
SP
Devices 7SJ62/63/64 are equipped with an integrated trip circuit supervision. Depend-
ing on the number of available binary inputs (not connected to a common potential),
supervision with one or two binary inputs can be selected. If the allocation of the re-
quired binary inputs does not match the selected supervision type, then a message to
this effect is generated („74TC ProgFail").
• When using two binary inputs, malfunctions in the trip circuit can be detected under
all circuit breaker conditions.
• When only one binary input is used, malfunctions in the circuit breaker itself cannot
be detected.
A condition for the use of trip circuit supervision is that the control voltage for the circuit
breaker is at least twice the voltage drop across the binary input (V
Since at least 19 V are needed for the binary input, the supervision can only be used
with a system control voltage of over 38 V.
Comments
Failure: General Current Supervision
Failure: Current Summation
Failure: Current Balance
Failure: Voltage Balance
VT Fuse Failure (alarm >10s)
VT Fuse Failure (alarm instantaneous)
Failure: Phase Sequence
Failure: Phase Sequence Current
Failure: Phase Sequence Voltage
Measurement Supervision is switched OFF
>Failure: Feeder VT
>Failure: Busbar VT
C53000-G1140-C147-A, Edition 07.2015
> 2 · V ).
CTR BImin
SIPROTEC 4, 7SJ62/63/64 Handbuch