Signals; Settings - ABB RELION 620 Series Technical Manual

1MAC504801-IB E
4.2.3.6
4.2.3.7
Table 233: 59G/N Group settings
Parameter Values (Range)
Pickup value 0.010...1.000
Trip delay time 40...300000
Table 234: 59G/N Non group settings
Parameter Values (Range)
Operation 1=enable
5=disable
Reset delay time 0...60000
VG/V0 Select 1=Measured VG
2=Calculated V0
620 series ANSI
Technical Manual
Therefore, this function is often used as a back-up protection or as a release signal for the
feeder ground-fault protection.
The protection can also be used for the ground-fault protection of generators and motors
and for the unbalance protection of capacitor banks.
The ground voltage can be calculated internally based on the measurement of the three-
phase voltage. This voltage can also be measured by a single-phase voltage transformer,
located between a transformer star point and ground, or by using an open-delta connection
of three single-phase voltage transformers.

Signals

Table 231: 59G/N Input signals
Name Type
VG SIGNAL
BLOCK BOOLEAN
Table 232: 59G/N Output signals
Name Type
TRIP BOOLEAN
PICKUP BOOLEAN

Settings

Unit Step
xVn 0.001
ms 1
Unit Step
ms 1
Default Description
0 Ground voltage
0=False Block signal for activating the blocking mode
Description
Trip
Pickup
Default Description
0.1 Pickup value
40 Trip delay time
Default Description
5=disable Operation Disable / Enable
20 Reset delay time
1=Measured VG Selection for used VG/V0 signal
Section 4
Protection functions
285