Functionality A B C D E F
Non-directional earth fault, high-set stage - - ● ● - -
Non-directional earth fault, instantaneous stage - - ● ● - -
Non-directional sensitive earth fault - - ● ● - -
Negative-sequence overcurrent, instance 1 ● ● ● ● ● ●
Negative-sequence overcurrent, instance 2 ● ● ● ● ● ●
Phase discontinuity ● ● ● ● ● ●
Thermal overload ● ● ● ● ● ●
Circuit-breaker failure ● ● ● ● ● ●
Three-phase overvoltage, instance 1 - - - - - ●
Three-phase overvoltage, instance 2 - - - - - ●
Three-phase overvoltage, instance 3 - - - - - ●
Positive-sequence undervoltage - - - - - ●
Negative-sequence overvoltage - - - - - ●
Residual overvoltage, instance 1 - - - - - ●
Residual overvoltage, instance 2 - - - - - ●
Residual overvoltage, instance 3 - - - - - ●
Three-phase undervoltage, instance 1 - - - - - ●
Three-phase undervoltage, instance 2 - - - - - ●
Three-phase undervoltage, instance 3 - - - - - ●
Three-phase inrush current detection ● ● ● ● ● ●
Arc protection with three sensors ￮ ￮ ￮ ￮ ￮ ￮
Control
Circuit breaker control with basic interlocking
1)
● ● ● ● ● ●
Circuit breaker control with extended interlocking
2)
- ● - ● ● ●
Auto-reclosing of one circuit breaker ￮ ￮ ￮ ￮ ￮ ￮
Supervision and monitoring
Fuse failure supervision - - - - ● ●
Current circuit supervision - - - - ● ●
Circuit breaker condition monitoring - ● - ● ● ●
Trip-circuit supervision of two trip circuits ● ● ● ● ● ●
Disconnector position indication - ● - ● ● ●
Earthing switch position indication - ● - ● ● ●
Measurement
Transient disturbance recorder ● ● ● ● ● ●
Three-phase current ● ● ● ● ● ●
Current sequence components ● ● ● ● ● ●
Three-phase voltage - - - - ● ●
Voltage sequence components - - - - ● ●
Residual current ● ● ● ● ● ●
Table continues on next page
1MRS756378 D Section 3
REF615 variants
REF615 29
Application Manual
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