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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.
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Summary of Contents for CPM 310 G
Page 1: ...CPM 310 G Digital Overcurrent Protection Relay User Application Manual vEN 2016 03...
Page 2: ...2...
Page 6: ...6 ABOUT DEMA...
Page 11: ...11 INTRODUCTION...
Page 32: ...32 PACKING LABELING INFORMATION...
Page 34: ...34 OPERATING MANUAL...
Page 53: ...53 RELAY MENUS MANUAL...
Page 55: ...55 The Menu Tree...
Page 56: ...56...
Page 57: ...57...
Page 58: ...58...
Page 59: ...59...
Page 60: ...60...
Page 61: ...61...
Page 128: ...128 DIGICONNECT PC PROGRAM MANUAL...
Page 189: ...189 APPLICATION DIAGRAMS...
Page 191: ...191 Sample Power Transformer Protection Application Diagram...
Page 193: ...193 FUNDAMENTAL CABLING DIAGRAM...
Page 203: ...203 APPLICATION DIAGRAM NO 10 RS485 Cabling...
Page 204: ...204 TECHNICAL DATA...
Page 220: ...220 GLOSSARY...