Recording - ABB RET670 Commissioning Manual

1MRK 504 154-UUS B
13.2.2.2

Recording

It is of utmost importance to carefully record the test results. Special test sheets covering the
frequency of test, date of test and achieved test values should be used. IED setting list and
protocols from previous tests should be available and all results should be compared for
differences. At component failures, spare equipment is used and set to the requested value. A
note of the exchange is made and the new measured values are recorded. Test records for several
years of testing should be stored in a common file for a station, or a part of a station, to give a
simple overview of the period of testing and achieved test values. These test records are valuable
when analysis of service disturbances shall be done.
13.2.2.3 Secondary injection
The periodic maintenance test is done by secondary injection from a portable test set. Each
protection shall be tested according to the secondary injection test information for the specific
protection IED. Only the setting values adopted shall be checked for each protection function. If
the discrepancy between obtained value and requested set value is too big the setting should be
adjusted, the new value recorded and a note should be made in the test record.
13.2.2.4 Alarm test
When inserting the test handle of RTXP or using FT plugs, the alarm and event signalling is
normally blocked. This is done in the IED by setting the event reporting to
This can be done when the test handle is inserted or the IED is set to test mode from the local HMI.
At the end of the secondary injection test it should be checked that the event and alarm signalling
is correct by activating the events and performing some selected tests.
13.2.2.5 Self supervision check
Once secondary testing has been completed, it should be checked that no self-supervision signals
are activated continuously or sporadically. Especially check the time synchronization system, GPS
or other, and communication signals, both station communication and remote communication.
13.2.2.6 Trip circuit check
When the protection IED undergoes an operational check, a tripping pulse is normally obtained on
one or more of the output contacts and preferably on the test switch. The healthy circuit is of
utmost importance for the protection operation. If the circuit is not provided with a continuous
trip-circuit supervision, it is possible to check that circuit is really closed when the test-plug handle
has been removed by using a high-ohmic voltmeter and measuring between the plus and the trip
output on the panel. The measurement is then done through the trip coil of the circuit breaker and
therefore the complete trip circuit is checked.
Commissioning manual
Note that the breaker must be closed.
Commissioning and maintenance of the fault clearing system
Disabled during the test.
Section 13
SEMOD56528-14 v2
SEMOD56528-17 v2
SEMOD56528-20 v4
SEMOD56528-23 v4
SEMOD56528-26 v5
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