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DEMA DPM 400 D - User Manual

DEMA DPM 400 D
118 pages
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DPM 400 D
DIRECTIONAL PROTECTION RELAY
USER GUIDE

Table of Contents

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Summary

Introduction to DEMA 400 Series Relays

General Characteristics of DEMA 400 Series Relays

Physical Properties - Case and LEDs

3.1 Case and Construction

Describes the relay's stainless steel case, PVC coating, terminal blocks, and earthing provisions.

3.2-3.5 Relay Status LEDs

Details the function and behavior of Phase Fault, Earth Fault, Trip, and Alarm LEDs.

Physical Properties - Front Panel Interface

3.6-3.8 LEDs, Ethernet Port & Front Cover

Covers Power/Error LEDs, Ethernet port, and IP52 front cover.

3.9-3.14 Display, Buttons and Unit Lock

Describes the TFT display, multifunctional/reset buttons, and the internal unit lock mechanism.

Physical Properties - Labels and Connectors

3.15-3.18 Device Label, Earthing, Terminals & Coating

Explains device labels, earthing screws, terminal blocks, and special case coating.

Physical Properties - Internal Unit and Mounting

3.19-3.22 Circuit Diagram, Internal Unit & Mounting Tracks

Details the circuit diagram, internal unit design, and mounting tracks for the relay.

Physical Properties - Protection and Locking

3.23-3.24 Case Earthing Contact & Faraday Cage

Covers case earthing continuity and the Faraday cage for internal component protection.

Physical Properties - Locking Mechanisms

3.25-3.29 Unit Terminals, Locking & Handles

Describes terminal blocks, unit tracks, locking mechanisms, and handle/trigger functions.

Physical Properties - Case Mounting

3.30-3.33 Cover Screws, Plugs & Mounting Holes

Details cover mounting screws, terminal plugs, lock pivots, and mounting holes.

Main Menu Overview

4.1 Informations

Displays device-specific data like serial number, firmware version, and hardware details.

4.2 Measurements

Provides real-time monitoring of voltage, current, power, and frequency measurements.

4.3 Protection Settings

Allows configuration and adjustment of various protection functions and their parameters.

4.5 System Settings

Manages device language, date-time, display settings, and other system configurations.

4.6 Configuration

Enables field installation setup, phase rotation, blocking modes, and communication settings.

DEMA DPM 400 D Specifications

General IconGeneral
Amperage10A
Contact TypeSPDT
Rated Current10A
Contact Configuration1 Form C (SPDT)
Mechanical Life10, 000, 000 operations
Protection DegreeIP40
Coil Voltage24V DC
Electrical Life100, 000 operations
Voltage250V AC/30V DC
Rated Voltage250V AC/30V DC

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