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Megger ODEN AT User Manual

Megger ODEN AT
110 pages
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WWW.MEGGER.COM
User’s Manual
Art No.
ZP-BH02E
Doc.
BH0224TE V09a 2018
ODEN AT
High Current System

Table of Contents

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Megger ODEN AT Specifications

General IconGeneral
Test Voltage50 V, 100 V, 250 V, 500 V, 1000 V
Output Voltage1000 V
Insulation Resistance Range0.01 MΩ to 10 GΩ
DisplayLCD
Weight1.5 kg

Summary

Safety

1.1 General

General safety precautions and warnings.

1.2 Precaution level – DANGER

Detailed safety precautions for danger levels.

1.3 Precaution level – WARNING

Detailed safety precautions for warning levels.

1.4 Precaution level – IMPORTANT

Important safety precautions and notes.

Introduction

2.1 General

Overview of ODEN AT, its purpose, applications, and capabilities.

2.2 Fields of application

Primary and other fields where ODEN AT is used.

2.3 Reservations

Specific limitations and reservations for ODEN AT usage.

Control panel

3.1 ODEN AT control panel

Overview of the ODEN AT control panel and its blocks.

3.2 Side panel

Description of the side panel connections and indicators.

Display

4.1 The display

How the ODEN AT display presents information and directional indicators.

Menu options

5.1 General

Explanation of menu options and how to exit them.

5.2 AMMETER, V/A METER and SYSTEM menu options

Details on setting ammeters, voltmeter, and system parameters.

5.3 MEMORY and APPLICATION menu options

Options for saving settings and configuring applications.

How to install ODEN AT

6.1 Safety

Safety precautions specific to the installation process.

6.2 Loading ODEN AT onto a carriage

Instructions for safely loading ODEN AT components onto a carriage.

6.3 Connecting the test object and the current units to each other

Procedures for connecting ODEN AT to the test object and current units.

6.4 Series connection (output HIGH I)

How to connect current units in series for high voltage output.

6.5 Parallel connection (output HIGH I)

How to connect current units in parallel for high current.

6.6 Low-current output (output 0-30V/60V)

Using the low-current output on type X current units.

6.7 Connecting current units to the control unit

How to connect current units to the main control unit.

6.8 Grounding ODEN AT

Procedures for properly grounding the ODEN AT system.

6.9 Connecting ODEN AT to the mains

Instructions for connecting the ODEN AT to the mains power supply.

6.10 Mains power supply

Information on mains voltage, input current, and cables.

6.11 Current cables and conductors

Details on available cable sets and their specifications.

6.12 Standard multi-cable sets

Specifications for standard multi-cable sets by length and configuration.

6.13 Multi-cable sets with customised length

Information on custom length multi-cable sets and impedance calculation.

6.14 How to arrange the cable sets

Techniques for arranging cables to minimize impedance.

6.15 How to arrange bars

Guidelines for using copper bars as current conductors.

6.16 To get equal current from all current units

Methods to ensure even current distribution among units.

6.17 FAQ

Frequently asked questions about ODEN AT installation.

How to use ODEN AT

7.1 General

Introduction to ODEN AT functions and safety precautions.

7.2 How to generate current

Step-by-step guide to generating current with ODEN AT.

7.3 Rules of thumb when generating current

Practical guidelines and tips for current generation.

7.4 Setting the desired current

How to set low and high currents, including the I/30 function.

7.5 Setting times for limited-time generation (MAX TIME)

How to configure timed current generation.

7.6 Continuous current generation

How to generate current continuously until manually stopped.

7.7 Getting maximum current from ODEN AT

Factors limiting maximum current and how to achieve it.

7.8 Improving the resolution of current settings

Tips for improving the accuracy of current adjustments.

7.9 Generating pulse trains

How to generate intermittent current pulses.

7.10 Holding (freezing) measured values

How to freeze measured values using the HOLD function.

7.11 Measuring phase angle and polarity

How to measure phase angle and polarity.

7.12 Measuring Z, P, R, X, S, Q and power factor (cos φ)

Measuring various electrical parameters using the voltmeter.

7.13 Reading maximum current at an operation

How to display and read the maximum current value during an operation.

7.14 Measuring operating limits

Methods for measuring operating limits (pick-up/trip).

7.15 Measuring tripping/operation times

How to measure tripping and operation times.

7.16 Instantaneous trip unit measurement

Testing instantaneous trip pick-up and time.

7.17 Selecting ODEN AT configuration and current cables

Guidance on choosing the right ODEN AT system and cables.

7.18 How to succeed in selecting a suitable ODEN AT system

Procedure for selecting an appropriate ODEN AT system and cables.

7.19 Examples

Practical examples of using ODEN AT for specific tests.

Application examples

8.1 Testing a low-voltage breaker

How to test low-voltage circuit breakers, including tripping limits and times.

8.2 Testing the ratio of a current transformer

Procedure for testing current transformer ratios using ODEN AT.

8.3 Measuring the polarity of a current transformer

How to conduct a polarity test on a current transformer.

8.5 Testing a direct acting automatic recloser

Steps for testing direct acting automatic reclosers.

8.6 Testing a sectionalizer

Procedure for testing sectionalizers using ODEN AT.

8.7 Testing a ground grid

How to test the integrity of a ground grid using the High Current Method.

Troubleshooting

General

Common problems and their remedies for ODEN AT.

Error messages

Explanation of error messages and how to resolve them.

Measurement errors

Common measurement issues and their solutions.

Calibration

10.1 General

Overview of calibration procedures for ODEN AT instruments.

10.2 Calibration of offset

How to calibrate the zero-offset for ammeters and voltmeter.

10.3 Calibration of scale factor, ammeter 1

Steps to calibrate the scale factor for Ammeter 1.

10.4 Scale factor for the I/30-function

Calibrating the scale factor for the I/30 function.

10.5 Calibration of scale factor, ammeter 2

Steps to calibrate the scale factor for Ammeter 2.

10.6 Calibration of scale factor, voltmeter

Calibrating the scale factor for the voltmeter.

10.7 Resetting to preset (standardized) calibration values

How to reset calibration values to default settings.

Specifications

11.1 General

General specifications for the ODEN AT system.

11.2 Output specifications for 240 V ODEN AT systems at 50 Hz

Output voltage and time-on specs for 240V/50Hz systems.

11.3 Load curves

Load curves for ODEN AT systems at 240 V.

11.4 Output specifications for 400 V ODEN AT systems at 50 Hz

Output specifications for 400V/50Hz ODEN AT systems.

11.5 Load curves

Load curves for ODEN AT systems at 400 V.

11.6 Output specifications for 480 V ODEN AT systems at 60 Hz

Output specifications for 480V/60Hz ODEN AT systems.

11.7 Load curves

Load curves for ODEN AT systems at 480 V.

11.8 Ammeter 1

Specifications for Ammeter 1, including ranges and resolution.

11.9 Stop input

Specifications for the stop input parameter.

Appendix 1

A1.1 Transferring test data to a PC or a printer

How to transfer test data from ODEN AT to a PC or printer.

A1.2 How to connect via Win 7, 8 or 10

Connecting ODEN AT to a PC using Windows 7, 8, or 10.

A1.3 How to connect via Win 2000/XP using the Hyper Terminal program

Connecting ODEN AT via Hyper Terminal on Win 2000/XP.

A1.4 Transfers in ”NORMAL USE”

Data transfer format in normal use mode.

A1.5 Transfers in applications ”TEST RECLOSER” and ”SECTIONALIZER”

Data transfer format for recloser and sectionalizer applications.

Appendix 2

A2.1 Resistance measurement accuracy

Factors influencing resistance measurement accuracy and estimation.

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