Visual Inspection; Maintenance Tests - ABB Relion 650 Series Commissioning Manual

1MRK 505 264-UEN A
8.1.3.1

Visual inspection

Prior to testing, the protection IEDs should be inspected to detect any visible damage that
may have occurred (for example, dirt or moisture deposits, overheating). Should burned
contacts be observed when inspecting the IEDs, a diamond file or an extremely fine file can be
used to polish the contacts. Emery cloth or similar products must not be used as insulating
grains of abrasive may be deposited on the contact surfaces and cause failure.
Make sure that all IEDs are equipped with covers.
8.1.3.2

Maintenance tests

To be made after the first half year of service, then with the cycle as proposed above and after
any suspected maloperation or change of the IED setting.
Testing of protection IEDs shall preferably be made with the primary circuit de-energized. The
IED cannot protect the circuit during testing. Trained personnel may test one IED at a time on
live circuits where redundant protection is installed and de-energization of the primary circuit
is not allowed.
ABB protection IEDs are preferably tested by aid of components from the COMBITEST testing
system described in information B03-9510 E. Main components are RTXP 8/18/24 test switch
located to the left in each protection IED and RTXH 8/18/24 test handle, which is inserted in
test switch at secondary testing. All necessary operations such as opening of trip circuits,
short-circuiting of current circuits and opening of voltage circuits are automatically performed
in the right order to allow for simple and safe secondary testing even with the object in
service.
Preparation
Before starting maintenance testing, the test engineers should scrutinize applicable circuit
diagrams and have the following documentation available:
• Test instructions for protection IEDs to be tested
• Test records from previous commissioning and maintenance tests
• List of valid settings
• Blank test records to fill in measured values
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.
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.
Alarm test
When inserting the test handle the alarm and event signalling is normally blocked. This is done
in the IED by setting the event reporting to
Busbar protection REB650
Commissioning manual
Off during the test. This can be done when the test
© Copyright 2011 ABB. All rights reserved
Commissioning and maintenance of the fault clearing system
Section 8
SEMOD56525-5 v2
SEMOD56534-1 v1
SEMOD56528-5 v3
SEMOD56528-10 v2
SEMOD56528-14 v2
SEMOD56528-17 v2
SEMOD56528-20 v3
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