Testing; Test Equipment; Synchro-Check Tests; Test Of Voltage Difference - ABB REC 561 User Manual

1MRK 580 167-XEN
Page 5 - 40

4 Testing

4.1 Test equipment

4.2 Synchro-check tests

4.2.1 Test of voltage
difference
Synchronism and energizing
check for double circuit breakers
and voltage selection
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.
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. 8 shows the general test connection principle, which you can use dur-
ing testing.
This description describes the test of the version intended for one bay..
U-Bus
Test
equipment
U-Line
N
Fig. 8 General test connection for synchro-check with three-phase
voltage connected to the line side
Set the voltage difference at 30% U
check that operation is achieved when the voltage difference UDiff is lower
than 30% U /sqr3.
r
ABB Network Partner AB
REx 5xx
U-Bus
N
UL1
Input Phase
UL2
L1,L2,L3
UL3
L12,L23,L31
N
/sqr3 on the MMI, and the test should
r
Version 1.0-00
UMeasure
Ph/N
Ph/Ph
(X80167-8)