Table 1. Supported functions, continued
Functionality
CTs & VTs
Disconnector position indication, instance 1
●
1)
Disconnector position indication, instance 2
●
1)
Earthing switch position indication, instance 1
●
1)
Disconnector position indication, instance 3
●
2)
Disconnector position indication, instance 4
●
2)
Earthing switch position indication, instance 2
●
2)
Synchronism and energizing check
●
1)
Tap changer position indication
●
Tap changer control with voltage regulator
○
2)
Load shedding and restoration, instance 1
●
1)
Load shedding and restoration, instance 2
●
1)
Load shedding and restoration, instance 3
●
1)
Load shedding and restoration, instance 4
●
1)
Load shedding and restoration, instance 5
●
1)
Load shedding and restoration, instance 6
●
1)
Condition monitoring
Circuit-breaker condition monitoring, instance 1
●
1)
Circuit-breaker condition monitoring, instance 2
●
2)
Trip circuit supervision, instance 1
●
1)
Trip circuit supervision, instance 2
●
2)
Current circuit supervision, instance 1
●
1)
Current circuit supervision, instance 2
●
2)
Advanced current circuit supervision for transformers
●
Fuse failure supervision
●
1)
Measurement
Three-phase current measurement, instance 1
●
1)
Three-phase current measurement, instance 2
●
2)
Sequence current measurement, instance 1
●
1)
Sequence current measurement, instance 2
●
2)
Residual current measurement, instance 1
●
1)
Residual current measurement, instance 2
●
2)
Three-phase voltage measurement
●
1)
Residual voltage measurement
●
1)
Sequence voltage measurement
●
1)
Three-phase power and energy measurement
●
1)
Frequency measurement
●
1)
Transformer Protection and Control
1MRS757846 A
RET620
Product version: 2.0
ABB
7