Settings; Operation Principle - Hitachi Relion 650 Series Technical Manual

Section 8
Secondary system supervision
8.1.5

Settings

Table 24: TCSSCBR Non group settings (basic)
Name
Operation
tDelay
tReset
8.1.6

Operation principle

The TCSSCBR function expects the logical state of the supervised control circuit at its TCS_STATE
input: 0 indicates intact circuit, whereas 1 indicates a circuit fault (short circuit or open circuit).
Activating TCS_STATE (input value changed to 1) starts an internal operation timer. This timer
continues counting even if TCS_STATE is deactivated again. When the operation timer has reached
the limit set by tDelay and TCS_STATE is 1, the ALARM output is activated. It remains active for as
long as both conditions are fulfilled.
Deactivating TCS_STATE starts an internal reset timer. This timer is reset whenever TCS_STATE is
activated. When the reset timer has reached the limit set by tReset and TCS_STATE is still 0, it
resets the operation timer. This can be used to suppress short spikes in the supervision signal.
Activation of the BLOCK input deactivates the ALARM output and resets the internal timers.
66
Values (Range) Unit
Off -
On
0.020 - 300.000 s
0.020 - 60.000 s
© 2021 Hitachi Energy. All rights reserved.
Step Default
- On
0.001 3.000
0.001 0.500
1MRK 511 557-UEN Rev. A
GUID-958B656D-96BB-491A-8D43-78C352D37207 v1
PID-1837-SETTINGS v14.1.1
Description
Operation Off/On
Operate time delay
Reset time delay
GUID-08631276-DABF-4F7D-8B47-E19B66FBE286 v1
Technical Manual