Megger TRS1 Manuale utente

User Manual

TRS1

Transformer Ratio

Standard

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

TRS1

Transformer Ratio Standard

User’s Manual

NOTICE OF COPYRIGHT & PROPRIETARY RIGHTS

The contents of this manual are the property of Megger Valley Forge. 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 Valley Forge.

Megger Valley Forge 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 Valley Forge. 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 Valley Forgeproducts is strictly prohibited, except as permitted by

written license agreement with Megger Valley Forge.

TRADEMARK NOTICES

Megger® is trademark registered in the U.S. and other countries. All other brand and product names mentioned in this

document are trademarks or registered trademarks of their respective companies.

Megger Valley Forge is certified according to ISO 9001

Contents

Introduction................................................................. 1

1.2 Product overview ..................................................... 1

1.3 Control, input, output ............................................. 1

Safety........................................................................... 2

1.1 Responsible User...................................................... 2

1.2 Symbols................................................................... 2

1.3 General Precautions................................................. 2

Speciﬁcations .............................................................. 3

Perparing to test ......................................................... 4

4.1 Site preparations...................................................... 4

4.2 Connecting to TRS1................................................. 4

Operation .................................................................... 5

Service.......................................................................... 6

6.1 Troubleshooting ....................................................... 6

6.2 Maintenance............................................................ 6

6.3 Calibration............................................................... 6

6.4 Repairs..................................................................... 6

Appendix ..................................................................... 7

A.1 TTRU3 ..................................................................... 7

A.2 TTR 550503 / TTR3XX Series.................................... 7

A.1 550005B (Hand Crank)............................................ 7

1.1 Receipt of product

Prior to operation, check for loosened hardware or

damage incurred during transit. If these conditions are

found, a safety hazard is likely, DO NOT attempt to operate

equipment. Please contact Megger as soon as possible.

1.2 Product overview

The TRS1® is a unit designed to be used with ratio meters

as a high accuracy reference ratio standard. This unique

standard is able to provide ratios in both step down

(traditional ratio test instruments) and step up (Biddle

Hand Crank TTR) test modes. The standard is designed for

use as a laboratory calibration standard, or as a portable

check standard for ﬁeld ratio and phase veriﬁcation of any

ratio instruments.

1.3 Control, input, output

1. Calibration reference

2. H*- Terminal for H1/1U/A lead. P/C = potential/current

3. H- Terminal for H2/1V/B lead. P/C = potential/current

4. Ratio selection switch

Enables different ratios for step down or step up

5. Quick start guide

6. Step down/up toggle switch

Enable excitation from H or X leads (step down/up)

7. X* - Terminal for X1/2U/a lead. P/C = potential/current

8. X- Terminal for X2/2V/b lead. P/C = potential/current

INTRODUCTION

Information subject to change without notice 1

1.1 Responsible User

Only qualiﬁed and trained operators should operate the

TRS1. Operator must read and understand this entire

Instruction Manual prior to operating the equipment.

Operator must follow the instructions of this Instruction

Manual and attend the equipment while the equipment

is in use. In the event of equipment malfunction, the unit

should immediately be de-energized and returned to

Megger for repair. The Safety precautions herein are not

intended to replace your Company’s Safety Procedures.

Refer to IEEE 510 - 1983, IEEE Recommended Practices

for Safety in High- Voltage and High-Power Testing, for

additional information

1.2 Symbols

Caution, possibility of electric shock

Observe the following safety precautions:

n Observe all safety warnings on the equipment.

They identify areas of immediate hazard that

could result in injury or death.

n Use this equipment only for the purposes

described in this manual. Observe strictly the

Warning and Caution information provided in

this manual

n Treat all terminals of the TRS1 and high-

voltage power equipment systems as potential

electric shock hazards. Use all practical safety

precautions to prevent contact with energized

parts of the equipment and related circuits.

n Use suitable barriers, barricades, or warnings to

keep persons not directly involved with the work

away from test activities.

n Never connect the test equipment to energized

equipment.

n Do not use in an explosive atmosphere.

n Use the grounding and connection procedures

recommended in the ratio meter manual. The

ground connection must be the ﬁrst made

and the last removed. Any interruption of the

grounding connection can create an electrical

shock hazard.

n Personnel using heart pacemakers should obtain

expert advice on the possible risks before

operating this equipment or being close to the

equipment during operation

The TRS1 and the ratio meter should both

be considered sources of instantaneously

lethal levels of electrical energy.

1.3 General Precautions

SAFETY

2 TRS1 User Manual

Physical Data

Dimensions 5.6875 H x 12 W x 10.625 D in

(144 H x 304 W x 270 D mm)

Weight 12lbs (5 kg)

Electrical

Input Frequency 50 to 240 Hz

Step Down Voltage Input < 275V AC

Step Up Voltage Input < 8V AC

Max Loading < 5VA

Regulatory

Safety IEC 61010

Vibration/Drop/Shock MIL-STD-810G

Environmental

Operating Temperature Range 14°F to 122°F (-10°C to 50°C)

Storage Temperature Range -22°F to 158°F (-30°C to 70°C)

Relative Humidity 0 to 90% Noncondensing

IP Rating 54

Ratios

From Calibration Report @ Max V

Mode Ratios Ratio Accuracy Phase Accuracy

Down 1:1, 2:1, 4:1, 8:1, 16:1, 32:1, 64:1, 128:1 ±0.0125% ±3 minutes

256:1, 512:1, 1024:1, 2048:1 ±0.0125% ±10 minutes

Up 1:1, 2:1, 4:1, 8:1, 16:1, 32:1 ±0.0125% ±3 minutes

3SPECIFICATIONS

Information subject to change without notice 3

PREPARING

FOR TEST

4.1 Site Preparation

Choose a location that meets the following conditions:

N The location is as dry as possible

N There is no ﬂammable material stored in the

vicinity

N The test area is adequately ventilated

N The test area is ﬂat surface

N Be sure all equipment is de-energized. Erect

suitable safety barriers to protect the operator

from trafﬁc hazards and to prevent intrusion by

unauthorized personnel. User provided Warning

lights are recommended

N Verify that the Local station ground is intact and

has impedance continuity to earth

4.2 Connecting to TRS1

See Appendix for instrument speciﬁc connections

Connections should be made in the order listed below:

1. Turn off the ratio meter intended to measure the TRS1

2. Disconnect leads from the ratio meter

3. Place the TRS1 in an upright position on a ﬂat surface

and open the lid

4. Connect leads to TRS1

5. Connect H1 (or equivalent) to TRS1 H

6. Connect H2 (or equivalent) to TRS1 H

7. Connect X1 (or equivalent) to TRS1 X

8. Connect X2 (or equivalent) to TRS1 X

9. Connect the leads to the ratio meter

For Kelvin leads, connect potential to P and Current

to C. For non-Kelvin leads, connect clamp across both

terminals.

4 TRS1 User Manual

1. Use the toggle switch to select Step Down or Step Up

operation (available for TRS1+)

2. Use the ratio selection switch to select the ratio for the

ratio meter to measure

3. Following the manual for the ratio meter, execute a

single phase ratio test

Ensure the ratiometer is not applying

voltage to the TRS1

1INTRODUCTION

PREPARING

FOR TEST 5OPERATION

Information subject to change without notice 5

6.1 Troubleshooting

The Troubleshooting Guide is arranged to help you

evaluate the reasons for TRS1 malfunction. The possible

test set malfunctions and causes are listed below.

Electronic circuit repairs should not be attempted in the

ﬁeld. Refer to Repair section.

Unit is not providing Step Down Ratios

n Toggle switch in incorrect position

n Ratio meter leads incorrectly connected

n Ratio meter sourcing more than 300VAC

n Problem with ratiometer

Unit is not providing Step Up Ratios

n Toggle switch in incorrect position

n Ratio meter leads incorrectly connected

n Ratio meter sourcing more than 8VAC

n Problem with ratiometer

6.2 Maintenance

Maintenance should be performed only by qualiﬁed

persons familiar with the hazards involved with

highvoltage test equipment. Read and understand Sections

1, 2, 3, 4, and 5 before performing any service.

The TRS1 requires only periodic inspection. Inspect all

hardware items to ensure all are in good condition.

The TRS1 may be cleaned periodically. In so doing, do

not allow water to penetrate panel holes. An allpurpose,

household spray cleaner can be used to clean the panel.

Polish with a soft, dry cloth. Clean the cables and mating

panel receptacles with isopropyl or denatured alcohol

applied with a clean cloth.

6.3 Calibration

A complete performance and calibration check should be

made at least once every year. This will ensure that the

TRS1 is functioning properly over the entire measurement

range. The TRS1 calibration is performed on each new or

repaired unit before sending it to a customer.

6.4 Repairs

Any service or repair of this equipment should be

performed only by qualiﬁed persons who are aware of

electrical hazards and the necessary precautions required

to prevent injury.

Megger offers a complete Repair and Calibration Service

and recommends that its customers take advantage of

this service for routine maintenance or in the event of any

equipment malfunction.

In the event Service is required, contact your Megger

representative for a product Return Authorization (RA)

number and shipping instructions.

Ship the product prepaid and insured and marked for

the attention of the Megger Repair Department. Please

indicate all pertinent information, including catalog

number, serial number, and problem symptoms.

6SERVICE

6 TRS1 User Manual

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