Checking the operation of binary input and output
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. Disconnect one of the phase voltage from the main fuse group or the pilot fuse
group. Observe the binary outputs of the IED. The MAINFUF or the 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
.
10.8.3.1
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.
Section 10
1MRK 511 360-UEN A
Testing functionality by secondary injection
140
Bay control REC670 2.1 IEC
Commissioning manual