ABB Network Partner AB
Synchronism and energizing
check for single circuit breaker
with voltage selection
Version 1.0-00
1MRK 580 152-XEN
Page 5 - 22
4Testing
At periodical checks, the functions should preferably be tested with the
used settings. To test a specific function, you might need to change some
setting parameters, for example:
• AutoEnerg = On/Off/DLLB/DBLL/Both
• ManEnerg = Off
• Operation = Off, On
The tests explained under the “Synchro-check tests” heading describe the
settings, which can be used as references during testing, are presented
before the final settings are specified. After testing, restore the equipment
to the normal or desired settings.
4.1 Test equipment A secondary injection test set with the possibility to alter the phase angle
by regulation of the resistive and reactive components is needed. Here, the
phase angle meter is also needed. To perform an accurate test of the fre-
quency difference, a frequency generator at one of the input voltages is
needed. You can also perform the tests with computer-aided test system
FREJA
FREJA has a specially designed program for evaluating the synchro-
check function.
Fig. 10 shows the general test connection principle, which you can use
during testing.
This description describes the test of the version intended for one bay.
Fig. 10 General test connection for synchro-check with three-phase
voltage connected to the line side
4.2 Synchro-check tests
4.2.1 Test of voltage
difference
Set the voltage difference at 30% U
r
/sqr3 on the MMI, and the test should
check that operation is achieved when the voltage difference UDiff is lower
than 30% U
r
/sqr3.
Test
equipment
U-Bus
U-Line
N
U-Bus
N
UL1
UL2
UL3
N
Input Phase
L1,L2,L3
L12,L23,L31
UMeasure
Ph/N
Ph/Ph
REx 5xx
(X80152-10)
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