4 MONITORING, CONTROL AND SUPERVISION
4.1 VOLTAGE TRANSFORMER SUPERVISION
Fast block operation < 1 cycle
Fast block reset < 1.5 cycles
Time delay +/- 2% or 20 ms, whichever is greater
4.2 STANDARD CURRENT TRANSFORMER SUPERVISION
IN> Pick-up Setting +/- 5%
VN< Pick-up Setting +/- 5%
IN> Drop-off 0.9 x setting +/- 5%
VN< Drop-off 1.05 x setting +/-5% or 1 V, whichever is greater
Time delay operation Setting +/-2% or 20 ms, whichever is greater
CTS block operation < 1 cycle
CTS reset < 35 ms
4.3 DIFFERENTIAL CURRENT TRANSFORMER SUPERVISION
Accuracy
I1> Pick-up Setting +/- 5%
I1> Drop-off 0.9 x setting +/- 5%
I2/I1> Pick-up Setting +/- 5%
I2/I1> Drop-off 0.9 x setting +/-5%
I2/I1>> Pick-up Setting +/- 5%
I2/I1 >> Drop-off 0.9 x setting +/-5%
Time delay operation Setting +/-2% or 20 ms, whichever is greater
CTS block diff operation < 1 cycle
CTS reset < 35 ms
4.4 CB STATE AND CONDITION MONITORING
Accuracy
Timers +/- 40 ms or 2%, whichever is greater
Broken current accuracy +/- 5%
Reset time < 30 ms
Chapter 27 - Technical Specifications P543i/P545i
728 P54x1i-TM-EN-1
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