Function Revision History; Verifying The Restrained Protection; Verifying The Unrestrained Protection; Verifying The Directional Unrestrained Protection - ABB Relion 670 Series Commissioning Manual

Section 10
Testing functionality by secondary injection
• Restrained protection
• Unrestrained protection
• Directional unrestrained protection
• Directional sensitive protection
• Differential Alarm
• Blocking functionality
10.3.2.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
10.3.2.2

Verifying the restrained protection

1. Use settings for the installation.
2. Inject currents corresponding to the transformer rated current on both sides so that the
differential current is 0% and the bias current is 100%.
3. Decrease the injected current on one side until TRRES is set, and note the value.
4. Increase the injected current until TRRES is reset, and note the value.
10.3.2.3

Verifying the unrestrained protection

1. Use the settings for the installation.
2. Feed one side of the IED with injected current only, increase the current until TRUNRES is set,
and note the value.
3. Decrease the injected current until TRUNRES is reset, and note the value.
10.3.2.4

Verifying the directional unrestrained protection

1. Use settings for the installation.
2. Inject currents corresponding to the transformer rated current on both sides so that the
differential current is 0% and the bias current is 100%.
3. Decrease the phase angle between the sides slowly from 180 degrees until TRDRUNR is set,
and note the value of the angle between the two sides at the moment of the TRDRUNR
operation.
4. Increase the phase angle back slowly until TRDRUNR resets, and note the value.
70
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 Waveform check made to depend on the level of the fundamental differential current.
2.2.3 -
2.2.4 -
2.2.4 -
2.2.5 -
© 2017 - 2021 Hitachi Power Grids. All rights reserved
1MRK 506 377-UEN Rev. K
GUID-A2277232-DD35-4EF2-858A-AA666A467A2B v2
GUID-2429DE17-A458-4773-9A59-3C0E138B3CDF v2
GUID-F637A553-A3B7-4CA8-A975-29566DAF86B5 v2
GUID-F129A972-AE80-4D19-A6D4-0F5547A4FC8F v2
Railway application RER670
Commissioning manual