Jet Engineering Services
Title : CHECK LIST OF RELAY TESTING
ELECTRICAL RELAY TEST CHECK LIST
PART I
Index no
T-PreCom-1000-R0
Page no
1 of 1
Sr. No
1.
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
2.14
2.15
2.16
DESCRIPTION
Mechanical Checks and Visual Inspections
Check nameplates information (visible location) as per
technical specifications.
Check tightness of all screws.
Check that all grounding is securely connected.
Inspect for physical damage or defects
Checking of display operation
Checking of operation of all buttons / knobs
Ensure that there is no foreign material, moisture, dust,
etc., inside panels and device cases.
Ensure that all relays, relay covers, meters, controls and
test facilities are properly identified as per the approved
drawings and relevant standards and that the
identification does not obscure information displays.
Electrical Tests
Check calibration of leakage current meters.
Insulation resistance test at 1 kV DC.
All protection checking with secondary injection tests
Checking of Relay settings as per chart
Current injection as per IEC curve
Test time recording as per Standard protocol
Independent OC,SC,EF protection testing
Functional test of protection, controls and interlocks.
Functional test of remote alarm and indications.
At each current test facility, confirm current flow and
polarity in the subject phase and neutral as appropriate
and according to the approved schematics. Confirm no
current in the other two phases.
Withdraw each relay in the current circuit one at a time
and confirm that the case shorting facility is working and
that at no time during its withdraw is the current circuit
opened. Check test facility shorting and isolating devices
for proper operation.
Confirm current flow in the relay by opening the case
shorting manually and confirming the meter to read zero.
Confirm that any phase selector switch for metering is
connected in the correct phase being tested. (for each
phase of each current circuit).
A final check of each relay current circuit shall be
conducted by current injection at the source end while
measuring magnitude.
Final calibration test of all protective relays must be
carried out on approved settings with the relays mounted
in their cases, by secondary injection at the front panel
mounted test facilities.
Testing of Pickup and dropout voltage, verification of all
contacts
DONE
REMARKS