Cabling - DEMA CPM 310 G User Manual

Cabling

The following pages describe the cabling procedure of DEMA CPM 310 G Digital Overcurrent
Protection Relays. The critical points to be considered about the connections will also be clarified.
CABLING DIAGRAM
The picture below shows the rear view of CPM 310 G, where terminals are located. As shown on the
picture; programmable inputs, RS 485 serial communications port, auxiliary power supply terminals,
inner circuit earthing terminals and secondary current inputs are located on the left terminal group;
trip relay, watchdog relay and programmable output terminals are located on the right terminal group.
Case earthing point is located on the upper side of the case, just above the left terminal group.
Rear View and Terminals Legend
CPM 310 G circuit diagram is located on the right side of the relay case when viewed from the front,
and this diagram is given also in the following pages; on the other hand, the picture above will
provide support for cabling practice by explaining the grouping logic of the terminals. ↺
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