DEMA CPM 310 G User Manual

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DIP-SWITCH SETTINGS
DEMA CPM Series Overcurrent Protection Relays are equipped with dip-switches to provide
compatibility with various kinds of protection current transformers. By employing appropriate dip-
switches;
 Acquisition of phase and earth current values from X / 1 A or X / 5 A current transformer,
 Acquisition and processing of phase current within the range of (0.1-40) I
n
,
 Acquisition and processing of earth current within the range of (0.1-40) I
en
or (0.02-5) I
en
,
 Using X / 1 A or X / 5 A CTs,
 evaluation, visualization and taking action for phase current at (0.1-40) I
n
range,
 evaluation, visualization and taking action for earth current at (0.1-40) I
en
, (0.02-5) I
en
range.
Current transformers play a critical role in secondary protection systems, as they generate the signals
essential for the systems. Inappropriate selection and use of current transformers may result in:
 reduced performance of secondary protection systems,
 total loss of protection, or
 loss of primary supply continuity.
To ensure the reliability secondary protection system,
 selection of current transformers must be done considering the engineering principles, and
 use of secondary protection relays with standards compliant characteristics is required.
With respect to the principles hereby mentioned, the settings of CPM 310 G dip-switches must be
done considering the instructions given in the following pages and with great care.
Localization of Dip Switches on the Internal Unit
Instructions are given in the following pages and are supported by pictures and figures. Examine them
thoroughly. 

DEMA CPM 310 G Specifications

General

Brand	DEMA
Model	CPM 310 G
Category	Relays
Language	English