Ampcontrol Pty Ltd – ABN 28 000 915 542
IPD USER MANUAL
IPDB014 Version 14 – SEP/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
APPROVED FOR EXTERNAL DISTRIBUTION
– PROPERTY OF AMPCONTROL PTY LTD
– NOT TO BE REPRODUCED IN PART
14.3 Operational Sequence
14.3.1 Starting the Outlet
Before an outlet can be energised the following conditions must apply:
a) No protection faults present
b) Fan interlocking enabled
c) Stop input open
d) Local and remote start inputs closed
e) RTU stop and PTC inputs closed
Once these conditions are obtained a cable fault lock out test is performed automatically. This takes 1
second. If the result of this test is satisfactory the IPD Relay goes into the run mode and the MCR relay
picks up.
The “RUN” LED on the Remote Display Module is illuminated and the open collector output on the
relay is switched on to provide remote monitoring if required.
A time delay of 5 seconds is allowed for the Main Contactor Interlock (MCI) to close. If it does not
close within this time, then the run mode is exited.
The Start input must be held closed whilst the IPD is performing
the initial EFLO test. If the Start input is released prior to the
completion of this test, the start sequence will be aborted.
It should be noted that if the main contactor does not close when the MCR relay closes and the
start/stop conditions are maintained, then the IPD will cycle through the following start sequence:
testing, run, stopped, pause then repeat the sequence while ever the start input is closed.
14.3.2 Stopping the Outlet
If a stop input is closed while the relay is in run mode, the run is cleared, and the MCR relay de-
energises. The event log reads “Stopped”. If a stop input is closed during a cable fault lockout test,
then the test is aborted.
Stop inputs are operational only. Emergency stops must be wired
directly into the pilot circuit.
14.3.3 Uncommanded Open
While the main contactor is closed, the MCI input is continuously monitored. If it opens, the run is
cleared and the MCR relay de-energises. In this case the event log records “MC Opened” which
indicates that the outlet was turned off by something other than the IPD Relay, e.g. open circuited main
contactor coil or control supply.
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