Table 2. Supported functions
Functionality
A
B
C
D
N
Protection
Three-phase non-directional overcurrent, low stage
1
1
1
1
1
Three-phase non-directional overcurrent, high stage
2
2
2
2
2
Three-phase non-directional overcurrent, instantaneous stage
1
1
1
1
1
Three-phase directional overcurrent, low stage
2
-
-
-
2
Three-phase directional overcurrent, high stage
1
-
-
-
1
Non-directional earth fault, low stage
-
1
-
1
1
Non-directional earth fault, high stage
1
1
1
1
1
Non-directional earth fault, instantaneous stage
-
1
-
1
1
Directional earth fault, low stage
2
1
3
-
3
Directional earth fault, high stage
1
-
1
-
1
Transient/intermittent earth fault
1
-
-
-
1
Negative-sequence overcurrent
2
2
2
2
2
Three-phase thermal overload for feeder
1
1
1
-
1
Phase discontinuity
1
1
1
-
1
Three-phase current inrush detection
1
1
1
1
1
Three-phase overvoltage
-
-
3
-
3
Three-phase undervoltage
-
-
3
-
3
Positive-sequence overvoltage
1)
-
-
-
-
2
Positive-sequence undervoltage
1)
-
-
-
-
2
Negative-sequence overvoltage
1)
-
-
-
-
2
Residual overvoltage
-
-
3
-
3
Frequency gradient
-
-
-
-
5
Overfrequency
-
-
-
-
5
Underfrequency
-
-
-
-
5
Load shedding
-
-
-
-
6
Fault locator
1)
-
-
-
-
1
Circuit-breaker failure
1
1
1
1
2
Autoreclosing
1
1
1
-
2
Tripping logic
1
1
1
1
2
Feeder Protection and Control
1MRS756380 A
REF630
Product version: 1.0
Issued: 15.09.2009
6
ABB
Summary of Contents for REF630
Page 1: ...Relion 630 series Feeder Protection and Control REF630 Product Guide ...
Page 78: ...78 ...
Page 79: ......