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.
Timer
Once activated, the timer runs until the set value tDelay is elapsed. The time
characteristic is according to DT. When the operation timer has reached the maximum
time value, the ALARM output is activated. If a drop-off situation occurs during the
operate time up counting, the reset timer is activated.
The binary input BLOCK can be used to block the function. The activation of the
BLOCK input deactivates the ALARM output and resets the internal timer.
9.3.7 Technical data
Table 164: TCSSCBR Technical data
Function Range or value Accuracy
Operate time delay (0.020 - 300.000) s ± 0,5% ± 110 ms
1MRK 511 287-UEN A Section 9
Secondary system supervision
207
Technical manual
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