Ampcontrol Pty Ltd
– ABN 28 000 915 542
EFL PROTECTION RELAY USER MANUAL
MAG-178 Version 5
– MARCH/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 15 of 23
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5
COMMISSIONING AND CALIBRATION
Prior to being put into service, the electrical protection system must be correctly commissioned. This
manual does not cover system commissioning; the full scope of commissioning tests should be
determined during the risk assessment or FMEA covering the design of the electrical protection system.
The following tests can provide guidance on checking the correct operation of the EFL Relay during
commissioning. This is not intended to provide an exhaustive commissioning checklist, but should be
considered to be a minimum set of tests.
5.1 Earth Fault Lockout Test
In
order to ensure that the EFL Relay’s earth fault lockout protection is operating correctly, perform the
following test:
1. Open the main contactor that the EFL Relay is protecting.
2. Connect a separate 2.9M
Ω resistor between each outlet phase conductor and earth, on load side
of the Main Contactor.
3. Ensure that the EFL initiates an EFLO trip when each of the resistors are placed on the phase
conductors individually.
4. Confirm that an EFLO trip prevents the main contactor from being closed.
WARNING:
if the outlet is attempted to be started while these resistors are connected, and the EFL
Relay fails, the full system voltage will be applied to the resistors.
NOTE:
If preforming an EFLO t
est with a load connected, a single 0.9MΩ resistor can be connected
between any phase and earth.
5.2 Frozen Contactor Test
In order to ensure that the EFL Relay’s frozen contactor protection is operating correctly, perform the
following test:
1. Open the main contactor that the EFL Relay is protecting.
2. Apply a 25Vac or 60Vdc voltage to the load side of the contactor
3. Wait for the Back EMF timer to end.
4. Ensure that the CBR output de-energises from an Electrical Frozen Contactor (FC) trip, tripping
the upstream circuit breaker.
5.3 Undervoltage Test
In order to ensure that the EFL Relay’s under voltage protection is operating correctly, perform the
following test:
1. Open the main contactor that the EFL Relay is protecting.
2. Using a double poled switch, close the RUN and MCI inputs to the EFL Relay at the same time.
This will indicate to the EFL Relay that the main contactor is closed and is required to be. As the
main contactor remains open, the relay should see no voltage on the load side of the contactor.
3. Confirm that the EFL Relay initiates an undervoltage trip.
4. After an undervoltage trip occurs (which should result in the main contactor opening), if the MCI
input to the EFL Relay does not open within 1 second, a Frozen Contact (FC) trip will occur.
