Ampcontrol Pty Ltd
– ABN 28 000 915 542
OCS USER MANUAL
MAG-182 Version 5
– FEB/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 20 of 72
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WARNING!
During this test the
Cassette Protection Element will generate up to
2700VDC
from the 24 VDC input supply
and apply this voltage to the
phase conductors
.
5.6 Over Current/Motor Overload Current Injection
Test the Over Current/Motor Overload protection by carrying out secondary/primary injection on the CT
inputs of the Cassette Protection Element.
Inject 2x Full Load Current (FLC) into one of the CT terminals and ensure that all relevant tripping
circuits operate successfully, in the time expected according to the settings employed, and that latched
trips may be reset in the appropriate manner. Repeat on the other CT terminals.
5.7 Short Circuit Current Injection
Test the Short Circuit protection by carrying out secondary/primary injection on the CT inputs of the
Cassette Protection Element.
Inject a current value relevant to the settings employed into one of the CT terminals and ensure that all
relevant tripping circuits operate successfully, in the time expected, and that latched trips may be reset in
the appropriate manner. Repeat on the other CT terminals.
5.8 Main Contactor Fail
While the Cassette Protection Element is stopped (that is, the MCR output is open), apply a voltage on
the load side of the contactor. The voltage must be greater than the selected trip level. Ensure that a
CBR trip is initiated by the Cassette Protection Element.
NOTE
A Main Contactor Fail (MCF) trip can be reset by pressing the MCF
Reset Pushbutton on the front of the OCS Protection Element or
through the communications protocol.
While the Cassette Protection Element is stopped, close the MCI digital input. Ensure that a CBR trip is
initiated by the Cassette Protection Element.
5.9 Voltage Measurement
Validate the voltage measurement function of the Cassette Protection Element by checking the
measured voltages via the PLC when the main contactor is closed.
5.10 RTX
Validate the correct operation of the RTX by making changes to load parameters, moving the machine to
a different outlet and ensuring that the correct settings are available on the new outlet.
