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Section 11
Testing functionality by secondary injection
•
•
•
•
•
2.
Set a constant voltage input of UL1 = 63.5 V at 0° and UL2 = 63.5 V at 180° secondary and a
current signal at IL1 = 1A at 0° and IL2 = 1A at 180°.
3.
Ensure that the P output of CMMXU function has exceeded 10 MW and remains stable.
4.
Change the current signal at IL1= 2A at 0° and IL2= 2A at 180°. Both START and STARTRISE
signals should be active for 100 ms.
5.
Change the current signal at IL1= 1A at 0° and IL2= 1A at 180°. Both START and STARTLOW
signals should be active for 100 ms.
11.9.6.2
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.
11.10
Control
11.10.1
Synchrocheck, energizing check, and synchronizing SESRSYN
This section contains instructions on how to test the synchrocheck, energizing check, and
synchronizing function SESRSYN for single, double and 1½ breaker arrangements.
Prepare the IED for verification of settings as outlined in section
section
At commissioning and periodical checks, the functions shall be tested with the used settings. To test
a specific function, it might be necessary to change some setting parameters, for example:
•
AutoEnerg = Off/DLLB/DBLL/Both
•
ManEnerg = Off
•
Operation = Off/On
•
Activation of the voltage selection function if applicable
The tests explained in the test procedures below describe the settings, which can be used as
references during testing before the final settings are specified. After testing, restore the equipment
to the normal or desired settings.
A secondary injection test set with the possibility to alter the phase angle and amplitude of the
voltage is needed. The test set must also be able to generate different frequencies on different
outputs.
Figure
50
description describes the test of the version intended for one bay.
Figure
51
connected to the line side.
204
Operation = ON
MinStVal = 10
DelSt> = 100
DeltaT = 7
tHold = 100
"Preparing for test"
in this chapter.
The description below applies for a system with a nominal frequency of 50 Hz but
can be directly applicable to 60 Hz. SESRSYN can be set to use different phases,
phase to earth or phase to phase. Use the set voltages instead of what is indicated
below.
shows the general test connection principle, which can be used during testing. This
shows the general test connection for a 1½ breaker diameter with one-phase voltage
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 378-UEN Rev. K
GUID-2FE5E5F0-0E6C-499E-93D2-471C183B89BF v2
"Requirements"
and
Line differential protection RED670
Commissioning manual
SEMOD53560-1 v2
M2377-3 v12
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