Ampcontrol Pty Ltd
– ABN 28 000 915 542
OTS-EL USER MANUAL
MAG-205 Version 3
– DEC/19
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 19 of 23
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5.1 Earth Leakage Protection Function Test
The Earth Leakage test can only be initiated with the outlet energised. When the EL test is initialised, the
OTS-EL will energise the existing external EL test circuit. This simulates an EL current to be detected by
the
outlet’s earth leakage toroid.
NOTE
The OTS itself does not generate the test current; it operates in parallel
to the existing manual EL test circuit.
Once the earth leakage test is initiated, the OTS-EL will measure the time taken for the outlet to open its
contactor or breaking device. In addition, the OTS-EL will also monitor the voltage on the load side of
this breaking device to determine the time that it takes for the back EMF generated by the connected
load to subside to extra low voltage (<50VAC). This represents the true clearing time following an earth
leakage fault.
The magnitude of the current that flows through the earth leakage toroid is determined by the design of
the test circuit installed. It is the responsibility of the installer to ensure that this current is sized to provide
meaningful results when the earth leakage test is conducted by the OTS.
NOTE
The installer is responsible for ensuring that the EL test current is of a
suitable magnitude to provide a meaningful test.
It is recommended that the circuit design is chosen such that the test
current is between 110% and 120% of the trip level of the earth leakage
protection relay (AS/NZS 2081 Appendix E4, AS/NZS 4871.1:2012
Clause 2.6.2.4).
