ABB Relion 630 Series RET630 Product Manual page 6

Transformer Protection and Control
RET630
Product version: 1.1
Table 2. Functions used in preconfigurations. Column 'n' shows the total number of
available function instances regardless of the preconfiguration selected.
Functionality
Protection
Three-phase non-directional overcurrent, low stage (LV side)
Three-phase non-directional overcurrent, low stage (HV side)
Three-phase non-directional overcurrent, high stage (LV side)
Three-phase non-directional overcurrent, high stage (HV side)
Three-phase non-directional overcurrent, instantaneous stage (LV
side)
Three-phase non-directional overcurrent, instantaneous stage (HV
side)
Three-phase directional overcurrent, low stage
Three-phase directional overcurrent, high stage
Non-directional earth-fault, low stage (LV side)
Non-directional earth-fault, low stage (HV side)
Non-directional earth-fault, high stage (LV side)
Non-directional earth-fault, high stage (HV side)
Directional earth-fault, low stage
Directional earth-fault, high stage
Stabilised restricted earth-fault (LV side)
Stabilised restricted earth-fault (HV side)
High-impedance-based restricted earth-fault protection
Negative-sequence overcurrent (LV side)
Negative-sequence overcurrent (HV side)
Three-phase current inrush detection
Three-phase thermal overload for transformers
Three-phase overvoltage (LV side)
Three-phase undervoltage (LV side)
Positive-sequence overvoltage
Positive-sequence undervoltage
Negative-sequence overvoltage
Residual overvoltage
6
1MRS756978 D
Issued: 2011-05-18
A B n
1 1
2
1 1
1 1
2
1 1
1 1
2
1 1
- - 2
- - 1
- 1
2
1 1
- 1
2
1 1
- - 2
- - 1
- 1
2
- 1
- - 2
1 1
4
1 1
- - 1
1 1 1
2 2 2
2 2 2
- - 2
- - 2
- - 2
- - 3
ABB