ABB RET630 - Supported Functions

Table 2. Supported functions
Functionality A B N
Protection
Three-phase non-directional overcurrent, low stage, LV side 1 1
2
Three-phase non-directional overcurrent, low stage, HV side 1 1
Three-phase non-directional overcurrent, high stage, LV side 1 1
2
Three-phase non-directional overcurrent, high stage, HV side 1 1
Three-phase non-directional overcurrent, instantaneous stage, LV side 1 1
2
Three-phase non-directional overcurrent, instantaneous stage, HV side 1 1
Three-phase directional overcurrent, low stage - - 2
Three-phase directional overcurrent, high stage - - 1
Non-directional earth fault, low stage, LV side - 1
2
Non-directional earth fault, low stage, HV side 1 1
Non-directional earth fault, high stage, LV side - 1
2
Non-directional earth fault, high stage, HV side 1 1
Directional earth fault, low stage - - 2
Directional earth fault, high stage - - 1
Stabilised restricted earth fault, LV side - 1
2
Stabilised restricted earth fault, HV side - 1
High-impedance–based restricted earth-fault protection - - 2
Negative-sequence overcurrent, LV side 1 1
4
Negative-sequence overcurrent, HV side 1 1
Three-phase inrush-current detector - - 1
Thermal overload for transformers 1 1 1
Three-phase overvoltage, LV side 2 2 2
Three-phase undervoltage, LV side 2 2 2
Positive-sequence overvoltage
1)
- - 2
Positive-sequence undervoltage
1)
- - 2
Negative-sequence overvoltage
1)
- - 2
Residual overvoltage - - 3
Frequency gradient - - 6
Overfrequency - - 3
Transformer Protection and Control 1MRS756788 A
RET630
Product version: 1.0 Issued: 15.09.2009
6 ABB