Table 2: Standard configurations
Description Std. conf.
Non-directional overcurrent and directional earth-fault protection A and B
Non-directional overcurrent and non-directional earth-fault protection C and D
Non-directional overcurrent and directional earth-fault protection with phase-voltage based measurements E
Directional overcurrent and earth-fault protection with phase-voltage based measurements, undervoltage and overvoltage
protection F
Table 3: Supported functions
Functionality A B C D E F
Protection
Three-phase non-directional overcurrent, low-set stage ● ● ● ● ● -
Three-phase non-directional overcurrent, high-set stage, instance 1 ● ● ● ● ● -
Three-phase non-directional overcurrent, high-set stage, instance 2 ● ● ● ● ● -
Three-phase non-directional overcurrent, instantaneous stage ● ● ● ● ● ●
Three-phase directional overcurrent, low-set stage, instance 1 - - - - - ●
Three-phase directional overcurrent, low-set stage, instance 2 - - - - - ●
Three-phase directional overcurrent, high-set stage - - - - - ●
Directional earth-fault, low-set stage, instance 1 ● ● - - ● ●
Directional earth-fault, low-set stage, instance 2 ● ● - - ● ●
Directional earth-fault, high-set stage ● ● - - ● ●
Non-directional (cross country) earth fault, using calculated Io ● ● - - ● ●
Transient/intermittent earth fault ● ● - - ● ●
Non-directional earth fault, low-set stage - - ● ● - -
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 - - - - - ●
Table continues on next page
1MRS756378 D Section 2
REF615 overview
REF615 17
Application Manual
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