1MRS751802-MUM
REX 521
21
Protection Relay
Technical Reference Manual, Standard Configurations
Table 2.-5 Condition monitoring functions available in the different standard
configurations of REX 521
Function Description
CB wear Circuit breaker electric wear 1
TCS1 Trip-circuit supervision 1
MCS 3I Supervision function of the energizing current input circuit
MCS 3U Supervision function of the energizing voltage input circuit
TIME1 Operation time counter
Table 2.-6 Power quality monitoring function available in the different
standard configurations of REX 521
Function Description
PQ 3Inf Current waveform distortion measurement
PQ 3Unf Voltage waveform distortion measurement
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