Ampcontrol Pty Ltd
– ABN 28 000 915 542
PF1 USER MANUAL
MAG-165 Version 6
– March/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 39 of 71
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8.2 EL Toroid Monitoring
The PF1 generates a CT detection signal continuously to test the integrity of the Earth Leakage circuit.
The CT detection signal tests the toroidal current transformer, the wiring loop to the toroid and the input
to the protection relay as required by AS/NZS 2081:2011.
If the PF1 fails to detect the CT detection signal via the earth leakage toroid, an earth leakage trip will be
initiated, opening the main contactor. This fault must be present for at least 5 seconds to cause a trip.
NOTE
The CT detection wiring must have a
loop resistance below 2
Ω
.
8.3 EL Reset Procedure
To use the reset function the user must connect a switch (normally open momentary pushbutton)
between the Reset input terminal (5) and the VDC digital input supply terminal (4) (refer to Figure 4.4).
The user must manually reset an earth leakage trip after a fault has occurred. The procedure is as
follows:
1. Investigate and rectify the fault as per site procedures.
2. Press the reset button for a minimum of 300ms.
NOTE
Performing a reset operation will reset all of the PF1 r
elay’s latched
trips, provided any fault conditions are no longer present.
