Ampcontrol Pty Ltd – ABN 28 000 915 542
HPB USER MANUAL
HPBB012 Version 9 – March/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
Where these “low voltage” circuits need to connect near the power circuits (e.g. Current transformers,
cable connection module, main contactor auxiliaries etc.), care needs to be taken to ensure that the
circuits are adequately separately and restrained. This ensure that the separation is maintained, even if
a wire termination becomes loose etc.
4.3.8 High Voltage Circuits
The “high” voltage circuits of the HPB are the 110 VAC supply (110V version Pins 30, 31 only) and the
relay contacts. Apart from keeping these separate from other wiring to the relay, there are no special
requirements.
The relay contacts of the HPB Relay must not be used to switch more
than 190 VAC, 5A or 100VA.
4.3.9 Earthing
The HPB has two earth connections. The earth pin 7 is for the communication and pilot circuits. The
earth on Pin 29 connects to the earth shield of the HPB Relay’s internal transformer (110V version
only) and chassis. The CCMB-6.6kV also has an earth connection and the CCMB-22kV has two earth
connection. The CCMB-22kV signal earth should be connected to the HPB pin 7. All other connections
should be run back separately to the main earth point.
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