Ampcontrol Pty Ltd
– ABN 28 000 915 542
IPM V2 USER MANUAL
IPM2B003 Revision 15
– MAY/18
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 14 of 83
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trip is initiated. In typical installations the CBR output is used to trip a circuit breaker upstream from the
outlet‟s contactor.
For detailed information on the operation of the Short Circuit protection function, refer to Section 7.2.
3.1.7 Pump Snore Function
The IPM relay has a Pump Snore function that provides additional control functionality for pump
installations. The Snore function automatically stops the output upon detection of a low current
condition, avoiding damage to the pump components due to overheating. The outlet will be restarted
after a fixed or automatically adjustable time delay.
For detailed information on the operation of the Pump Snore function, refer to Section 11.
3.1.8 Fan Burp Function
The IPM relay has a Fan Burp function that provides additional control functionality for fan installations.
The Burp function allows for the progressive inflation of ventilation bags (tubes) by pulsing the motor
contactor controlling a ventilation fan, several times at start-up.
For detailed information on the operation of the Fan Burp function, refer to Section 10.
3.2 Accessories
The IPM relay requires a number of accessories to perform its protection functions. These accessories
will be introduced in the following subsections. Some accessories are marked as optional and are not
required for the IPM to perform its basic protection functions. Purchasing these optional items will,
however, expand the capabilities of the installation.
3.2.1 Insulation Test Module (ITM)
The IPM is connected to the outlet‟s phase conductors via a high
impedance Insulation Test Module (ITM). This allows the IPM to perform a
high voltage DC insulation test prior to the closing of the outlet‟s contactor.
The IPM also uses the ITM to monitor the magnitude of the phase
voltages. This is used during the frozen contactor testing to ensure that
when the outlet‟s contactor opens, voltage is removed from the outlet. The
ITM is available in a 415V model or a 1kV model.
3.2.2 Phase Current
Transformers (CTs)
The IPM relay measures the
phase currents from all three of the outlet‟s phases. Using
these measured current values, the IPM is able to implement
its overload and short circuit protections functions. The IPM
requires three (3) current transformers to measure the phase
currents. The phase current transformers are available in two
standard sizes: 45mm inner diameter (1000:1 & 500:5) and
88mm inner diameter (1000:1 only). The current transformers
are panel mounted units.
Figure 3.4: Phase Current Transformers
Figure 3.3: Insulation
Test Module