1MRS751802-MUM
REX 521
35
Protection Relay
Technical Reference Manual, Standard Configurations
3.3. HW version: High/Sensor
3.3.1. Standard configuration H01 (Sensor)
3.3.1.1. Features
• Three-phase directional overcurrent protection with two stages
• Three-phase non-directional overcurrent protection with one stage
• Three-phase transformer inrush and motor start-up current detector
• Directional earth fault protection with three stages
• Phase discontinuity protection for three phases
• Three-phase thermal protection for cable
• Synchro-check/voltage-check function with one stage
• Supervision function for energizing current input circuit
• Supervision function for energizing voltage input circuit
• Current waveform distortion measurement
• Voltage waveform distortion measurement
• Three-phase current measurement
• Neutral current measurement
• Three phase-to-earth voltage measurements
• Residual voltage measurement
• System frequency measurement
• Three-phase power and energy 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
• User-configurable alarm LEDs
The standard configuration H01 is available only with the sensor
HW version.
To Next Page
