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 38 of 71
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8
EARTH LEAKAGE: AS/NZS 2081 PROTECTION FUNCTION
The PF1 has a selectable Earth Leakage (EL) protection function, which has been designed in
accordance with AS/NZS 2081: 2011. This function monitors the earth fault current on the protected
outlet via a summation toroid and trips the outlet’s main contactor when the measured current exceeds
the trip limit.
The earth leakage protection function uses a definite time operating characteristic with adjustable trip
sensitivity and an adjustable time delay. When a fault occurs that exceeds the set trip level and time
delay, an earth leakage trip occurs.
When an earth leakage trip occurs, the PF1 will de-energise the K1 output r
elay to trip the outlet’s main
contactor. All earth leakage trips are latching and are required to be reset before the outlet can be
restarted again. Before a reset is performed the source of the earth leakage trip should be found and
rectified.
The PF1 r
elay’s earth leakage protection settings can be configured using the Smart Tools software.
Adjustable settings are: Enabled, Bandwidth Mode, Trip Current, and Trip Time.
Table 13: Earth Leakage Protection - Configuration - via Smart Tools PC Software
Enabled
Bandwidth Mode
Trip Time
Trip Current
Yes
Wide
50 ms
30 mA
No
50Hz
100 ms
100 mA
150 ms
150 mA
200 ms
200 mA
300 ms
250 mA
400 ms
300 mA
500 ms
350 mA
400 mA
450 mA
500 mA
1000 mA
8.1 Earth Leakage Bandwidth Mode
The PF1 has two modes of operation for its earth leakage protection function; 50Hz and Wide mode.
50Hz Mode
When 50Hz mode is selected, the PF1 uses a band pass filter to prevent tripping on earth leakage
currents outside of the 50Hz power frequency range. This is not the preferred mode of operation, as in
this mode the PF1 could filter out potentially harmful “noise” on the mains frequency.
NOTE
The PF1 has been designed with a safety function within the 50Hz
mode that initiates an earth leakage trip if the measured earth leakage
current exceeds 1.1A, even if that current is outside the 50Hz envelope.
Wide Mode
When Wide mode is selected, the PF1 will sense earth leakage currents in the 30 to 500Hz frequency
range.
This is the preferred mode of operation
, as in this mode the PF1 will provide protection
against earth leakage faults across a much wider frequency range.
