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General Specifications & Advantages
DEMA proudly presents the users and modern networks a solid alternative for overcurrent protection
with CPM 310 G; with the state-of-art electronic, physical and functional technology for use with (X/5)
A or (X/1) A conventional type current transformers. As a DSP
1
based digital multi-function protection
& control relay with 3 phase & earth overcurrent protection, DEMA CPM 310 G is tested to fulfill
international standards requirements; and provides the users numerous assembly, commissioning and
service advantages.
DEMA CPM 310 G Digital Overcurrent Protection Relays are type tested in internationally accredited
laboratories to comply with IEC 60255, IEC 60529, IEC 60695 and IEC 60068 standards, and have
been introduced into service under the guarantee of ISO9001:2008.
The general specifications of CPM 310 G are listed below to create a common sense for the product.
All functions CPM 310 G offers will be examined thoroughly throughout this manual.
Function
ANSI Code CPM 310 G
Phase Overcurrent – Instantaneous Trip
50
3 thresholds
Phase Overcurrent – Delayed Trip
51
3 thresholds
Earth Overcurrent – Instantaneous Trip
50N
3 thresholds
Earth Overcurrent – Delayed Trip
51N
3 thresholds
Restricted Earth Fault Protection
64N
3 thresholds
Thermal Overload Protection
49
2 thresholds
Undercurrent Protection
37
1 threshold
Negative Sequence Overcurrent Protection
46
2 thresholds
Latching
86
Circuit Breaker Failure Detection
50BF
Auto-reclosing
79
4-shot
Broken Conductor Detection
46 BC
Temperature / Buchholz Protection
26 / 63
Cold Load Pickup Function
Settings Groups
2 groups
Trip Circuit Supervision
TCS
Circuit Breaker Supervision and Control
Blocking Logic Selectivity
Delaying Logic Selectivity
On Screen CB ON / OFF commanding
Optic-coupled Inputs
7
Outputs (Total / SPDT / SPST)
8 / 4 / 4
Disturbance Waveform Recording
5 x 3 s
Event and Fault Records
150 records
Communication Ports
USB + RS485
(X/1) A & (X/5) A CT compatibility
Frequency and Current Measurements
Thermal Image Measurements
Positive and Negative Sequence Current Measurements
Auto-recloser Measurements
Watchdog
Self-Function-Testing
1
DSP: Digital Signal Processor.
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...