Caution:
Use a locknut or similar mechanism to ensure the integrity of stud-connected
PCTs.
Caution:
The recommended minimum PCT wire size is 2.5
mm² for countries whose
mains supply is 230 V (e.g. Europe) and 3.3 mm² for countries whose mains
supply is 110 V (e.g. North America). This may be superseded by local or
country wiring regulations.
For P60 products, the recommended minimum PCT wire size is 6 mm². See
manual for details.
Caution:
The PCT connection must have low-inductance and be as short as possible.
Caution:
All connections to the equipment must have a defined potential. Connections
that are pre-wired, but not used, should be earthed when binary inputs and
output relays are isolated. When binary inputs and output relays are connected
to a common potential, unused pre-wired connections should be connected to
the common potential of the grouped connections.
4.7 PRE-ENERGIZATION CHECKLIST
Caution:
Check voltage rating/polarity (rating label/equipment documentation).
Caution:
Check CT circuit rating (rating label) and integrity of connections.
Caution:
Check protective fuse or miniature circuit breaker (MCB) rating.
Caution:
Check integrity of the PCT connection.
Caution:
Check voltage and current rating of external wiring, ensuring it is appropriate for
the application.
MiCOM P747 Chapter 2 - Safety Information
P747-TM-EN-1 19
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