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I-Gard DSP-OHMNI - User Manual

I-Gard DSP-OHMNI
50 pages
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C-EG30EM Instruction Manual V2, June 2020
DSP-OHMNI

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Summary

About I-Gard

Introduction to High Resistance Grounding

DSP-OHMNI System Overview

Introduces I-Gard's DSP-OHMNI HRG system and its purpose.

Key Features: Fault Location and Trip Modes

Details fault location via pulsing and system trip modes.

DSP-OHMNI System Components

Lists standard and optional modules like DDR2, OHMNI-PM, DSP-DFM, DSP-DRM.

Application of the DSP System

DDR2 Voltage Sensor Unit Types

Details various DDR2 types for system voltage compatibility and certifications.

Installation and Setup

Required and Optional Modules

Lists necessary components and optional modules for system installation.

Module Mounting and Cabling

Covers DIN rail mounting and ribbon cable connections for modules.

Wiring and Connections

Sensor and Communication Wiring

Describes wiring for sensors, DDR2, and serial communications.

Wiring Schematics and Cable Types

Shows wiring diagrams and details ribbon and shielded cable usage.

System Setup and Configuration

Accessing and Navigating Settings

Explains how to access settings via the home screen and user/admin modes.

Communication and Alarm Settings

Covers configuring communication (MODBUS) and NGR/Alarm settings.

System Operation and Status Display

Pulse Setup and Control

Details pulse setup, modes, and frequency for fault location.

System Status and Fault Indication

Covers normal screens, leakage current, feeder statuses, and fault displays.

Alarm Handling and Event Logging

Explains alarm indications, bus faults, event notifications, and fault messages.

DSP-DRM Resistor Monitoring

NGR Monitoring Methods and Installation

Details NGR monitoring modes and the installation of the DSP-DRM module.

NGR Status and Error Indication

Shows NGR status displays and messages for module detection.

DSP-ADM Arc Detection Module

Arc Flash Protection and Sensor Integration

Explains arc flash protection, sensor types, and DSP-ADM installation.

Viewing Arc Detection Module Status

Describes how to view the status of the DSP-ADM channels on the system display.

System Communications

Communication Ports and Protocols

Details RS-485 and Ethernet ports, MODBUS RTU protocol, and wiring.

MODBUS Data Structure and Registers

Explains MODBUS data format, register addresses for various functions.

Technical Specifications

Module Power and Performance Specs

Lists power requirements, ratings, and performance metrics for DSP-DPS, DSP-DFM, DSP-DSM.

DSP-DRM and DSP-ADM Specifications

Details specifications for DSP-DRM and DSP-ADM modules, including general standards.

Outline Dimensions

Module Physical Dimensions and Connections

Shows physical dimensions of modules and connection diagrams for DPS and DM modules.

Installation Connection Diagrams

Provides wiring diagrams for DSP-DRM and DSP-ADM modules.

How-To Video Guides

Video Tutorials for System Setup and Operation

Lists video guides covering setup, configuration, operation, and troubleshooting.

I-Gard DSP-OHMNI Specifications

General IconGeneral
Neutral Grounding Resistor (NGR) MonitoringYes
Ground Fault LocationYes
SensitivityAdjustable
TypeDigital
CommunicationModbus
CertificationsUL

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