Commissioning Preliminaries
Carefully examine the module and case to ser that no damage has occurred during transit.
Check that the relay serial number on the module, case and cover are identical, and that the
model number and rating information are correct.
Carefully remove any elastic bands/packing fitting for transportation purposes.
Check that the external wiring is correct to the relevant relay diagram or scheme diagram. The
relay diagram number appears inside the case.
Particular attention should be paid to the correct wiring and value of any external resistors
indicated on the wiring diagram/relay rating information.
Note that shorting switches shown on the relay diagram are fitted internally across the relevant
case terminals and close when the module is withdrawn. It is essential that such switches are
fitted across all CT circuits.
If a test block system is to be employed, the connections should be checked to the scheme
diagram, particularly that the supply connections are to the ‘live’ side of the test block.
Earthing
Ensure that the case earthing connection above the rear terminal block, is used to connect the
relay to a local earth bar.
Insulation
The relay, and its associated wiring, may be insulation tested between:
-
all electrically isolated circuits
-
all circuits and earth
An electronic or brushless insulation tester should be used, having a dc voltage not exceeding
1000V. Accessible terminals of the same circuit should first be strapped together. Deliberate
circuit earthing links, removed for the tests, subsequently must be replaced.
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Due to RMS continuous product improvement policy this information is subject to change without notice. User_Guide-4/Iss E/25/08/08