Standard Configuration B02; Features - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
3.1.2.
3.1.2.1.
20
Protection Relay
Technical Reference Manual, Standard Configurations

Standard configuration B02

Features

• Three-phase non-directional overcurrent protection with three stages
• Three-phase transformer inrush and motor start-up current detector
• Non-directional earth-fault protection with three stages
• Phase discontinuity protection for three phases
• Three-phase thermal protection for cables
• Supervision function for the energizing current input circuit
• Current waveform distortion measurement
• Three-phase current measurement
• Neutral current measurement
• Calculation of the accumulated electric breaker wear of the circuit breaker (CB)
• Transient disturbance recorder
• Trip-circuit supervision
• Delayed trip output for the circuit-breaker failure protection (CBFP) function
• Automatic reclosing 1...5 shots
• Circuit breaker control with indication
• Lockout function
• Object indication
• Logic control position selector
• User-configurable I/Os
• Interlocking
3I > 50/51
I >
50N/51N
0
3I >
68
2f
I > 46
3 49F
79
0
I
CBFP 62
LO 86
REX 521 B02
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MCS 000
TCS
CBCM 0
I
R
3I~harm
I
3I
0
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