PILOTFUF signals are simultaneously activated. Only the output circuit
related to the open phase will be active i.e either MAINFUF or PILOTFUF.
3.
Establish a normal voltage operating condition and observe the corresponding
output signals. MAINFUF or PILOTFUF should change to 0 in about 27 ms.
4. Set normal conditions as mentioned in step 1.
5. Enable the BLOCK binary input and repeat step 2. MAINFUF or PILOTFUF
should not appear.
Checking the operation of MAINFUF and PILOTFUF
1. Simulate normal operation conditions with three-phase voltage on the main
fuse group and the pilot fuse group. Ensure the values are equal to their rated
values.
2. Decrease one of the three-phase voltages on main fuse group or pilot fuse
group. The voltage change must be greater than the set value for
Ud>MainBlock or Ud>PilotAlarm. MAINFUF or PILOTFUF signals are
activated without any time delay.
3. Set normal conditions as mentioned in step 1. MAINFUF or PILOTFUF
signals should reset.
4. Set SealIn to On, UD>MainBlock to 20% of UBase and USealIn to 70% of
UBase.
5. Apply three-phase voltages with the value slightly below USealIn level.
6. Decrease one of the three-phase voltages on main fuse group. The voltage
change must be greater than the set value for Ud>MainBlock. MAINFUF
signal is activated.
7. After more than 5 seconds increase the measured voltage back to the value
slightly below USealIn level. MAINFUF signal should not reset.
8. Slowly increase measured voltage to the value slightly above USealIn until
MAINFUF signal resets.
9. Record the measured voltage and compare with the set value USealIn.
11.9.3.1 Completing the test
GUID-38A57549-E6BF-46CB-ADFB-79305684EB67 v1
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
SEMOD53560-1 v1
11.10.1 Synchrocheck, energizing check, and synchronizing
SESRSYN
M2377-3 v12
This section contains instructions on how to test the synchrocheck, energizing
check, and synchronizing function SESRSYN for single, double and 1½ breaker
arrangements.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
220 Line differential protection RED670 2.2 IEC
Commissioning manual
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