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 41 of 71
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Table 14: Earth Continuity Protection - Configuration - via Smart Tools PC Software
Enabled
Yes
No
Trip Latching
Remote Start
Yes
Yes
No
No
Trip Resistance:
Series (Maximum)
10
Ω
15
Ω
20
Ω
30
Ω
45
Ω
Healthy Hysteresis:
Series
Trip Resistance:
Shunt (Minimum)
Healthy Hysteresis:
Shunt
Trip Time
-3
Ω
1250
Ω
+100
Ω
50 ms
100 ms
200 ms
300 ms
400 ms
500 ms
9.1 EC Series Resistance Monitoring
The PF1 measures the series resistance of the pilot-earth loop by applying a positive voltage to the pilot
conductor and measuring the pilot current. If the measured series resistance is above the trip setting for
a period of time that exceeds the set trip time, the PF1 de-energises the K1 output relay to trip the
outlet’s main contactor.
The fault must be cleared before the PF1 will allow the outlet to be restarted.
In non-latching mode, the PF1 will automatically reset after the fault has been cleared.
In latching mode, the PF1 must be reset after the fault has been cleared, before the outlet can be
started.
The EC series resistance monitoring function has a built in hysteresis that prevents an earth continuity
trip from being reset if the measured resistance is hovering around the trip level. The resistance must fall
below the trip level minus the hysteresis amount before an earth continuity fault can be reset. The earth
continuity series hysteresis has a default setting of 3
Ω. This value is fixed in this version of the PF1.
9.2 EC Shunt Resistance Monitoring
The PF1 measures the shunt resistance (pilot to earth) by applying a negative voltage to the pilot
conductor and measuring the pilot current. If the shunt resistance is detected to be below 1.25
kΩ for a
period of time that exceeds the set trip time, the PF1 de-energises the K1 output relay
to trip the outlet’s
main contactor.
The fault must be cleared before the PF1 will allow the outlet to be restarted.
In non-latching mode, the PF1 will automatically reset after the fault has been cleared.