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 25 of 71
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5.4 Earth Continuity Test
Required if: Earth Continuity Protection is enabled.
In order to test that the earth continuity protection is functioning correctly, two tests must be performed:
the series resistance test and the shunt resistance test.
These tests will verify that the earth continuity protection is functioning and is wired correctly, as well as
proving that the K1 output relay trips the main contactor when an earth continuity fault is detected.
EC Series Resistance Test
The EC series resistance trip can be verified by creating an open circuit in the pilot line, or by
temporarily installing a resistor in series with the pilot conductor. If a resistor is used, the value should
be
a minimum of 3Ω above the selected trip level to account for the tripping hysteresis level.
Confirm that the PF1 initiates an earth continuity trip and that the main contactor is opened. The red
“Trip” LED on the fascia of the PF1 should be illuminated.
Figure 5.2: Earth Continuity Series Test Wiring Options
EC Shunt Resistance Test
The EC shunt resistance trip can be verified by creating a short circuit between the pilot line and earth,
or by temporarily installing a resistor between the pilot line and earth. If a resistor is used, the
recommended value is 820
Ω (2W 1%).
Confirm that the PF1 initiates an earth continuity trip and that the main contactor is opened. The red
“Trip” LED on the fascia of the PF1 should be illuminated.
Figure 5.3: Earth Continuity Shunt Test Wiring Options
PF1
RELAY
20
EC Pilot
Test Resistor
(Trip Level + 3Ω)
Series E/C Test
Push Button
Pilot
Series E/C Test Option 1
PF1
RELAY
20
EC Pilot
Series E/C Test
Push Button
Pilot
Series E/C Test Option 2
21
EC Earth
21
EC Earth
PF1
RELAY
20
EC Pilot
Pilot
Shunt E/C Test Option 1
Shunt E/C Test
Push Button
≤ 1kΩ
Test Resistor
PF1
RELAY
20
EC Pilot
Pilot
Shunt E/C Test Option 2
Shunt E/C Test
Push Button
21
EC Earth
21
EC Earth