Before Testing; Safety; Sequence Of Tests - Siemens Reyrolle 7SR45 Argus Device Manual

6.2

Before Testing

Safety

6.2.1
NOTE
i
i
The commissioning and maintenance of the relay should only be carried out by skilled personnel trained in
protective relay maintenance and capable of observing all of the safety precautions and regulations appro-
priate to this type of relay and also the associated primary plant.
The following saftey procedures should be followed
•
The integrity of any protective conductor connection shall be checked before carrying out any other
actions.
•
The relay ratings, operating instructions, and installation instructions must be checked before the
commissioning or maintenance.
•
Ensure that all of the test equipment and leads have been correctly maintained and are in good condi-
tion.
•
Siemens recommends connecting all power supplies of the test equipment via a residual current relay
(RCD) which must be located as close to the supply source as possible.
•
The selection of test instrument and test leads must be appropriate to the application.
•
The selection of an inappropriate range on a multi-range instrument could lead to a dangerous flashover.
Therefore, fused instrument leads must be used when measurements of power sources are involved.
•
The failure or blowing of an instrument fuse or the operation of an instrument cut-out could cause the
secondary winding of the current transformer (CT) to become open circuit. Therefore,fused test leads
should not be used where the measurement of a CT secondary current is involved
•
Open circuit secondary windings on energized current transformers are a hazard that can produce high
voltages that are dangerous to personnel and damaging to equipment. Thus, test procedures must be
devised as to eliminate this risk.
6.2.2

Sequence of Tests

NOTE
i
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When testing other relays at the same time, coordinate with such testing to avoid danger to personnel and
equipment.
•
When cabling and wiring are complete, carry out a comprehensive check of all terminations for required
torque and compliance with the approved diagrams.
•
This is followed by the insulation resistance tests, which if satisfactory allows the wiring to be energized
by either the appropriate supply or test supplies.
•
When primary injection tests are completed satisfactorily, all remaining systems can be functionally
tested before the primary circuit is energized.
•
Some circuits can require further tests before being energized.
•
Protection relay testing requires access to the protection-system wiring diagrams, relay configuration
information, and protection settings.
•
The subsequent sequence of tests is based on the arrangement of the relay menu structure.
•
A test log is based on the actual tests completed and must be recorded for each relay tested.
Reyrolle, 7SR45, Device Manual
C53000-G7040-C101-2, Edition 09.2020
Functional Tests
6.2 Before Testing
105