U-Bus1
U-Line1
N
Test
equipment
IED
U-Bus1
N
IEC11000273-2-en.vsd
N
UMeasure
Ph/N
Ph/Ph
U-Bus2
U-Line2
U-Bus2
U-Line2
U-Line1
IEC11000273 V2 EN
Figure 20: General test connection for a 1½ breaker diameter with one-phase
voltage connected to the line side
6.9.1.1 Testing the synchronizing function
This section is applicable only if the synchronizing function is included.
The voltage inputs used are:
U-Line
UL1, UL2 or UL3 line 1 voltage inputs on the IED
U-Bus Bus voltage input on the IED
Testing the frequency difference
The frequency difference is in the example set at 0.20 Hz on the local HMI, and the test
should verify that operation is achieved when the FreqDiffMax frequency difference
is lower than 0.20 Hz. The test procedure below will depend on the settings used. Input
STARTSYN must be activated during the test.
1. Apply voltages
1.1. U-Line = 100% GblBaseSelLine and f-Line = 50.0 Hz
1.2. U-Bus = 100% GblBaseSelBus and f-Bus = 50.2Hz
2. Check that a closing pulse is submitted at a closing angle less than 2 degrees from
phase equality. Modern test sets will evaluate this automatically.
3. Repeat with
Section 6 1MRK 502 049-UEN A
Testing functionality
100
Commissioning manual
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