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 14 of 23
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The CBR relay is intended to be wired into the control circuit for the upstream circuit breaker. The CBR
will energise when the FC is in a healthy state. If an FC trip occurs, the CBR will be de-energised,
tripping the upstream circuit breaker and removing power from the frozen contactor.
4.4.6 Main Contactor Input (MCI) (Terminals 17 & 18)
The main contactor indication terminals should be wired to one of the main contactors normally open
(NO) auxiliary contacts. This provides indication on whether the main contactor is open or closed.
4.4.7 Run Input (RUN) (Terminals 19 & 20)
The run indication terminals should be wired to the contacts of the interposing relay that drives the
main contactor, see Figure 4.6. This provides indication on whether the interposing relay is open or
closed and hence whether the main contactor should be open or closed. The RUN input tells the EFL
what the main contactor should be doing and the MCI input tells the EFL what the main contactor is
doing.
4.4.8 Earth Connection (Terminals 21, 22, 23 & 24)
The EFL Relay is to be earthed to the main earth using at least one 1.5mm
2
earth cable.
4.4.9 Reset (Terminals 25 & 26)
The EFL Relay’s Reset terminals allow a normally open pushbutton or contact to be wired to the EFL
Relay to provide a reset function. Provided that a fault condition is not still present, shorting these two
terminals will reset any EFLO or UV trips on the relay (all FC trips must be reset using the push button
on the fascia of the relay).
4.4.10 Test-Delay Input (Terminals 27 & 28)
This input should be shorted to enable the test delay operation. This typically applies to the use in a fan
starter utilising a Burp sequence. Shorting terminals will inhibit the EFL performing checks during the
burp sequences.
4.4.11 Phase Conductor Connections (Flying Leads)
The EFL Relay interfaces with the phase conductors of the protected outlet via a high voltage barrier.
The EFL can be purchased with an internal barrier, or the EFL Relay and barrier can be purchased as
separate “stand-alone” units. The connection to the phase conductors is made using the three flying
leads (A, B & C phase) that extend from the EFL Relay/Barrier. These leads are each 1.2m long. If the
EFL Relay is purchased with the external barrier configuration, the EFL Relay and the external barrier
will need to be wired together as per Figure 4.6.
