Megger Frax 99 Manuel utilisateur

Released in 2011-06-01

FRAX User's Manual

Version 2.5

Notice of copyright & proprietary rights

The contents of this manual for FRAX 2.5.2272 are the property of Megger Sweden AB. No part of this work may be

reproduced or transmitted in any form or by any means, except as permitted in written license agreement with Megger

Sweden AB. Megger Sweden AB has made every reasonable attempt to ensure the completeness and accuracy of this

document. However, the information contained in this manual is subject to change without notice, and does not

represent a commitment on the part of Megger Sweden AB. Any attached hardware schematics and technical

descriptions, or software listings that disclose source code, are for informational purposes only. Reproduction in whole or

in part to create working hardware or software for other than Megger Sweden AB products is strictly prohibited, except as

permitted by written license agreement with Megger Sweden AB.

TRADEMARK NOTICES

FRAX is a trademark of Megger Sweden AB. All other brand and product names mentioned in this document are

trademarks or registered trademarks of their respective companies.

Megger Sweden AB, Eldarvagen 4, SE-187 75 TÄBY, Sweden

Tel: +46 8 510 195 00, Fax: +46 8 510 195 95

E-mail: seinfo@megger.com Internet: www.megger.com

USER'S MANUAL

for

Sweep Frequency Response Analyzer

FRAX 99, 101 and 150

IContents

Table of Contents

1FRAX 1

................................................................................................................................... 11.1 Safety First

................................................................................................................................... 21.2 FRAX Technical Specifications

................................................................................................................................... 31.3 Instrument Panels

................................................................................................................................... 71.4 Bluetooth Communication (only FRAX-101)

................................................................................................................................... 91.5 Built-in Battery Pack and Charger

................................................................................................................................... 101.6 Sweep Frequency Response

................................................................................................................................... 111.7 Calibration

................................................................................................................................... 111.8 Disposal

2Quick Start Tutorial 11

................................................................................................................................... 112.1 Saftey First

................................................................................................................................... 122.2 Preparatory Procedures

................................................................................................................................... 122.3 Start Up FRAX and Establish Communication

................................................................................................................................... 132.4 Create a New Test

................................................................................................................................... 142.5 Test Lead Connection

................................................................................................................................... 162.6 Test System Verification

................................................................................................................................... 192.7 Start Measurement

................................................................................................................................... 202.8 View Data

................................................................................................................................... 202.9 Export Data

3Installing FRAX Software 20

................................................................................................................................... 213.1 PC Requirements

................................................................................................................................... 213.2 Welcome Screen

................................................................................................................................... 213.3 License Agreement

................................................................................................................................... 213.4 Already Installed

................................................................................................................................... 223.5 Installation Location

................................................................................................................................... 233.6 Shortcuts Screen

FRAX User's ManualII

................................................................................................................................... 233.7 Installation Progress

................................................................................................................................... 243.8 Installation Complete

4FRAX Software 24

................................................................................................................................... 264.1 File Menu

................................................................................................................................... 394.2 Edit Menu

................................................................................................................................... 404.3 Configuration Menu

................................................................................................................................... 564.4 Windows Menu

................................................................................................................................... 574.5 Action Buttons

................................................................................................................................... 594.6 Legend

................................................................................................................................... 624.7 Views

5Appendices 64

................................................................................................................................... 645.1 Appendix A: Calibration Instruction

................................................................................................................................... 705.2 Appendix B: Optional Active Probes

................................................................................................................................... 715.3 Appendix C: Adjusting Output Voltage

................................................................................................................................... 725.4 Appendix D: Sweep Name Settings

................................................................................................................................... 765.5 Appendix E: FRAX cables and clamps

FRAX

1FRAX

Congratulations to your choice of FRAX Sweep Frequency Response Analyzer by Megger. We

at Megger have done our best and will continue do our best to satisfy our customers. Please

visit our home page at www.paxdiagnostics.com and do not hesitate to contact us directly.

Most dielectric and mechanical failures in large power transformers are preceded by

mechanical changes in the winding structure. These displacements in the winding structure

may be the result of transportation damage, short circuit forces, or natural aging effects on

the insulating structures used to support the windings. Detection of these displacements

before dielectric failure reduces maintenance costs, and improves system reliability.

FRAX Sweep Frequency Response Analyzer (SFRA) is designed to detect winding

displacements in power transformers or faults in the magnetic core. The system provides

attenuation signature curves that can easily be compared for deviations which indicate:

Core movements

Winding deformations and displacements

Faulty core grounds

Partial winding collapse

Hoop buckling

Broken or loosened clamping structures

Shorted turns and open windings

Unique features of FRAX:

High accuracy

Small size and low weight

Powerful analysis tools that are intuitive and easy to use

Wireless, Bluetooth, communication between laptop an instruments allows flexibility in the

field (FRAX-101 only)

Galvanic isolated USB interface for personnel and equipment safety

More safety and technical details are given in the following sections:

Safety First

FRAX Technical Specifications

Instrument panels: Front, Rear

Sweep Frequency Response

Test System Verification

Calibration

Disposal

1.1 Safety First

FRAX is a Sweep Frequency Response Analyzer designed for measuring of power transformers

in the field and at manufacturing sites.

Always follow local safety regulations.

Make certain that all personnel working with FRAX instrument have been trained in its use

and that all applicable safety precautions are taken.

Always connect the instrument to protective earth/ground using the separate earth/ground

cable. The earth/ground cable should be the first connection made and the last removed.

Do not use any accessories that are not intended for use together with the FRAX.

Refer all servicing to qualified personnel.

2FRAX User's Manual

1.2 FRAX Technical Specifications

General

FRA Method:

Sweep frequency (SFRA)

Frequency Range:

1 Hz - 10 MHz, user selectable

Extended Frequency Range:

0.1 Hz - 25 MHz, user selectable

Number of Points:

User selectable, maximum 32,000

Points Spacing:

Logarithmic, linear or combination of both

Dynamic Range/Internal Noise:

Dynamic Range/Internal Noise: >130dB (FRAX-99

>115dB). Extended range >110dB

Accuracy:

±0.5 dB (FRAX-99 ±1 dB) down to -100dB

IF Bandwidth/Integration Time:

User selectable

Software:

FRAX for Windows 2000/XP/Vista

PC Communication:

Bluetooth (FRAX-101) and galvanic isolated USB

Calibration Interval:

Maximum 3 years

Standards:

Fulfill requirements in CIGRE Brochure 342,

Mechanical Condition Assessment of Transformer

Windings using FRA and Chinese standard DL/T

911-2004, FRA on Winding Deformation of Power

Transformers

Analog Output

Channels:

Compliance Voltage:

0.2 - 20 V peak-to-peak

Measurement Voltage at 50 Ohm

0.1 - 10 V peak-to-peak

Output Impedance:

50 Ohms

Protection:

Short-circuit protected

Analog Inputs

Channels:

Sampling:

Simultaneously, 100MS/s

Input Impedance:

50 Ohms

Physical

Instrument Weight

1.4 kg/3.1 lsb, 1.9 kg (FRAX-101 with Battery)

6 kg (13 lb) (FRAX-150)

Dimensions

250 x 169 x 52 mm (9.84 x 6.65 x 2.05 in.)

305 mm x 194 mm x 360 mm (12 in. x 7.6 in. x

14.2 in.) (FRAX-150)

Input Voltage

90-135VAC and 170-264VAC, 47-63 Hz

Environmental

Operating Ambient Temperature:

-20° to 50°C (-4 to 122°F), Bluetooth 0° to 50°C

-5° to 50°C (23 to 122°F) for FRAX-150

Operating Relative Humidity:

< 90% non-condensing

Storage Ambient Temperature:

-20° to 70°C

Storage Relative Humidity:

< 90% non-condensing

CE Standards:

IEC61010 (LVD) EN61326 (EMC)

PC requirements

FRAX

Operating System

Windows 2000, Windows XP or Windows Vista

Processor

Pentium 500 MHz or higher

Memory/Hard Drive

256MByte / 30MByte free or more

Interface

Bluetooth (FRAX-101 only) and USB

Specifications are subject to change without notice.

1.3 Instrument Panels

1.3.1 FRAX-101/FRAX-99

1.3.1.1 Front Panel

Left-hand side, top down:

On/Off:

On/Off-switch, to turn the instrument On/Off, Switch labeled

I (On) and 0 (Off).

DC Input:

DC-input, to connect the AC/DC adapter.

USB:

USB-connector type B, to connect a USB cable to PC

Antenna (only FRAX-101):

Bluetooth module, enables Bluetooth communication

Right-hand side, top

down:

Generator (Yellow):

Generator output connected to Reference at Red Clip

Reference (Red):

Reference input connected to Generator at Red Clip

Measure (Black):

Measure input Connected to Black Clip

4FRAX User's Manual

Protective Earth/Ground

symbol and Protective

Earth/Ground connector

Always connect the instrument to station earth/ground using

the separate earth/ground cable. The separate earth/ground

wire should be the first connection made and the last

removed.

Probe

Connector for active probes. Optional and available on order.

Caution, risk of danger

symbol

Refers to follow instructions stated in User's Manual to ensure

safety. See Safety First.

1.3.1.2 Rear Panel

Left-hand side, top down:

Informative text

Serial number

Right-hand side, top

down:

DC input

DC-input, to connect the double insulated AC/DC adapter.

DC symbol. Polarity Symbol.

CE-mark

Megger guarantee that this product complies with relevant

CE directives and corresponding standards.

Calibration date

FRAX

1.3.2 FRAX-150

Left-hand side, top down:

USB:

USB-connectors

Network:

For connecting the FRAX-150 to LAN

Serial port:

For serial communication.

Right-hand side, top

down:

Protective Earth/Ground

connector

Always connect the instrument to station earth/ground using

the separate earth/ground cable. The separate earth/ground

wire should be the first connection made and the last

removed.

Power connector

Generator (Yellow):

Generator output connected to Reference at Red Clip

Reference (Red):

Reference input connected to Generator at Red Clip

Measure (Black):

Measure input Connected to Black Clip

Below the screen is a standard qwerty keyboard containing some special keys.

Tab

Backspace (or with shift) Delete

Shift key

On the right of the screen are some function buttons. They are

6FRAX User's Manual

Power down. Shuts down the FRAX-150 computer.

Home (not used)

Help

Information (not used)

Page Up

Page Down

On the right you will find the navigation panel.

In the middle of the navigation panel you will find the controls for the pointer and buttons

for left (top) and right click (bottom). The navigation panel also contains:

Test button. Press this to start a new test or measurement. This button has the

same functionality as the "Start" button on the FRAX-150 screen.

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