Completing The Test; Underimpedance Protection For Railway Transformers Zgtpdis; Function Revision History; Verifying The Signals And Settings - Hitachi RER670 Commissioning Manual

1MRK 506 377-UEN Rev. L
5. The test points P7 and P9 are intended to test the directional lines of impedance protection and
are used to find the directional accuracy.
6. For each test points, observe that the start output signals, START, STZx and STNDZx are
activated.
7. Trip signals TRIP and TRZx appears after a set delay time of tZx.
10.4.4.3

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to their original values, if they were changed for testing purposes.
10.4.5

Underimpedance protection for railway transformers ZGTPDIS

Prepare the IED for verification of settings outlined in Section
Values of the logical signals for ZGTPDIS are available on the local HMI under Main menu /Tests /
Function status /Impedance /ZGTPDIS (21T, Z<) /ZGTPDIS:x , where x = 1, 2. The Signal
Monitoring in PCM600 shows the same signals that are available on the local HMI.
10.4.5.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
10.4.5.2

Verifying the signals and settings

Keep the current constant while measuring operating characteristics. Keep the current as close as
possible to its rated value or lower. However, make sure it is higher than set minimum operating
current.
If the measurement of the operating characteristics runs under constant voltage conditions, ensure
that the maximum continuous current in an IED does not exceed four times its rated value.
Verifying mho offset characteristic
To verify zone 1 mho offset characteristic, at least two points must be tested.
Railway application RER670
Commissioning manual
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 Addition of one more instance into transformer protection package and setting range
extension for IMin to meet homologation, IEC 61850 LN mapping modification for Str and
Op data objects.
2.2.3 -
2.2.4 -
2.2.4 -
2.2.5 -
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
GUID-5C822F5B-16A3-41A4-8586-53D2A4D3719E v1
GUID-2DE57C53-0D98-4C7D-83F4-FEA15C369A55 v2
"Preparing the IED to verify
GUID-70204B53-E684-46FC-BD5E-7EB9EDBE4E4A v2
GUID-9545E35A-2419-4353-8165-97329B804BB3 v2
GUID-03EB19A6-A130-41E8-A8FF-D47C38BCF931 v2
Section 10
settings".
97