Protection Relays

CPM 311

Digital Multifunction Modular Type Current Protection Relay

DEMA proudly presents the users and modern networks a solid alternative for overcurrent protection with CPM 311; 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 based digital multi-function protection & control relay with 3 phase & earth overcurrent protection, DEMA CPM 311 is tested to fulfill international standards' requirements; and provides the users numerous assembly, commissioning and service advantages.

CPM 311 comprises a main unit, a control unit and an interconnection cable. The unique design of the product eliminates the need to extend the CT secondary, command and control cabling to the panel door - instead, the product utilizes a communications cable with RJ45 termination to provide communication between the main unit and control unit for the first time in the world; enabling easy and fast relay cabling.

  • General Features
  • Documents
  • 360 View
  • Softwares
Application Areas

MV

HV

Specifications
  • Wide range IEC, ANSI and Special curves

  • 5 Input, 4 Output

  • 8 Programmable Virtual Led

  • 9 INFO LED

  • Visualisation of activated functions on main screen (2 Group)

  • Function Test without using Relay Test Set

  • Visibility of R-S-T-N currents from 1,5 - 2 m distance thanks to the large LCD Screen (128 x 64 px)

  • 1-5 A Current transformer flexibility in usage

  • Blocking Selectivity by delaying previous breaker

  • Electro-magnetic compatibility tested for IEC directives,

  • Temperature/Buchholz/Pressure Protection

  • Remote or local Alarm-Reset

  • SCADA ready

  • Displaying Alarm and Fault Records with one click

  • Circuit Breaker trip/close

  • RS485 communication

    ­ - MODBUS RTU

    ­ - IEC60870-5-103

  • USB (front port) communication

  • IP52 and IP20 protection for front and rear panel respectively

ANSI Code

FUNCTION

ANSI CODE

CPM 311

Phase Overcurrent

50/51 P

3 thresholds

Earth Overcurrent

50/51N

3 thresholds

Negative Sequence        

Overcurrent Protection

46

2 thresholds

Undercurrent Protection

37

1 thresholds

Thermal Overload Protection

49

2 thresholds

Automatic reclosing

79

4 shot

Broken Conductor Detection

46BC

Breaker Failure Settings

50BF

Cold Load Pickup

CLPU-50/50N

Latching

86

Trip Circuit Supervision

74TCS

Blocking Relay

68

Measurements / Records
  • RMS Current Measurement

  • Max Rms Current Meas.

  • Fundemental Current Meas.

  • P/N Sequences Current Meas.

  • Thermal (θ) Measurements

  • Circuit Breaker Monitoring

  • Automatic reclosing Meas.

  • Event Records

  • Fault Records

  • Alarm Records

  • Comtrade Waveform Records

Communication
  • RS485 communication

    ­ - MODBUS RTU

    ­ - IEC60870-5-103

  • USB (front port) communication

Brochures
Leaflet
English / 21.09.2022 / 734.39 KB / PDF
Technical Brochure
English / 21.09.2022 / 2.9 MB / PDF
Quick Guide
English / 21.09.2022 / 911.28 KB / PDF
User Manual
English / 21.09.2022 / 23.43 MB / PDF
Test Reports
MODBUS Map
English / 21.09.2022 / 1.83 MB / PDF
EMC Test Report
English / 21.09.2022 / 19.7 MB / PDF
No Content Found
Digiconnect Relay Management Software v3.10
22/08/2022 13:48:26 / exe
Drivers for Digiconnect
22/08/2022 15:20:00 / exe