Chapter 2 – Safety Information
The PCT connection must have low-inductance and be as short as possible. For best EMC
performance, ground the unit using a 10 mm (0.4 inch) wide braided grounding strap.
All connections to the equipment must have a defined potential. Connections that are pre-
wired, but not used, should be earthed, or connected to a common grouped potential.
Pay extra attention to diagrams before wiring the equipment. Always be sure that the
connections are correct before energizing the circuits.
The connections: Console1, Console2, MODEM and Process bus are non-isolated and for
local connection only.
4.5 PRE-ENERGISATION CHECKLIST
Check voltage rating/polarity (rating label/equipment documentation).
Check CT circuit rating (rating label) and integrity of connections.
Check protective fuse or miniature circuit breaker (MCB) rating.
Check integrity of the PCT connection.
Check voltage and current rating of external wiring, ensuring it is appropriate for the
application.
4.6 PERIPHERAL CIRCUITRY
Do not open the secondary circuit of a live CT since the high voltage
produced may be lethal to personnel and could damage insulation. Short
the secondary of the line CT before opening any connections to it.
Reason devices DO NOT feature any automatic CT shorting feature. Therefore external shorting of the CTs is
mandatory. Check the equipment documentation and wiring diagrams carefully.
Where external components such as resistors or voltage dependent resistors (VDRs) are
used, these may present a risk of electric shock or burns if touched.
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