Completing The Test; Fuse Failure Supervision - ABB REG670 Commissioning Manual

Section 13
Testing functionality by secondary injection
13.9.2.6
13.9.3
246

Completing the test

Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were
changed for testing purposes.

Fuse failure supervision

Prepare the IED for verification of settings outlined in Section
verify settings".
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 Vdif Main block or Vdif
Pilot alarm. 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, Vdif Main block to 20% of VBase and VSealIn to 70% of VBase.
5. Apply three-phase voltages with the value slightly below VSealIn level.
6. Decrease one of the three-phase voltages on main fuse group. The voltage change
must be greater than the set value for Vdif Main block. MAINFUF signal is
activated.
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
1MRK 502 073-UUS A
M1405-130 v5
GUID-DCCD4C4A-8335-43BA-A2B2-9994380985B0 v2
"Preparing the IED to
GUID-004BFFE4-B1C1-4C0E-8D7A-ABE7B566AB28 v2
Commissioning manual