No
.
Command
Relay
(CR)
CB AuxCon1 AuxCon2 BI 1 BI 2 Dynamic State Static State
4 Closed OFF Open Closed L H CR successfully activated the circuit
breaker
With the Alarm delay parameter, you can set the time delay. After fixing the fault in the trip circuit, the
failure indication will automatically expire after the same time.
If the binary input signals
>Trip relay
or
>CB auxiliary contact
are not routed on the binary inputs
of the device, then the
Input sig. not routed
indication is generated and the Trip-circuit supervision
function is not in effect.
The following figure shows the logic diagram of the trip-circuit supervision with 2 binary inputs.
[lotcs2be-260912-01.tif, 1, en_US]
Figure 8-29 Logic Diagram of Trip-Circuit Supervision with 2 Binary Inputs
Trip-Circuit Supervision with 1 Binary Input
When using 1 binary input, you will not identify any disruptions on the circuit breaker. The binary input is
connected in parallel with the respective command relay of the protection device. The circuit-breaker auxiliary
contact is bridged with a high-resistance equivalent resistance R.
The following figure shows the principle of the trip-circuit supervision with 1 binary input.
8.3.11.4
Supervision Functions
8.3 Supervision of the Secondary System
970 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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