Megger TTRU3 Manuel utilisateur

TTRU3

True 3Ø Transformer Turns Ratiometer

USER MANUAL

2 TTRU3 User Manual us.megger.com

Information subject to change without notice 3

TTRU3

True 3Ø Transformer Turns Ratiometer

User 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 repro-

duced 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 infor-

mational 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 men-

tioned in this document are trademarks or registered trademarks of their respective companies.

Megger Valley Forge is certiﬁed according to ISO 9001

Address:

Megger Valley Forge

2621 Van Buren Ave

Norristown, PA 19403 USA

T +1 610 676 8500 sales@megger.com

F +1 610 676 8610 www.megger.com

Document Version: TTRU3_UG_EN_v01

Contents

4 TTRU3 User Manual us.megger.com

Contents

1 Introduction....................................................6

1.1 Receipt of product .........................................6

1.2 Product overview ...........................................6

1.3 Step Up vs Step Down ...................................6

1.4 Model Variation & Accessories .......................7

1.5 Top Panel.......................................................8

1.6 Side Panel......................................................9

1.7 Quick Start & Feet..........................................10

2 Safety..............................................................12

2.1 Responsible User............................................12

2.2 Symbols.........................................................12

2.3 General Precautions.......................................12

2.4 Input Power Precautions ................................13

3 Speciﬁcations .................................................14

4 Preparing for test...........................................14

4.1 Site preparations............................................16

4.2 Making Circuit Connections...........................17

4.3 PC Software Installation.................................18

4.4 PC Software Update ......................................19

4.5 PowerDB Installation......................................19

5 Operation .......................................................20

5.1 Initialization & Interface .................................20

5.2 Options..........................................................20

5.3 Conﬁrm/Cancel..............................................20

5.4 Menu Bar.......................................................20

5.5 Home Screen .................................................21

5.6 Help Screen ...................................................21

5.7 Settings Screen ..............................................23

5.8 Measurement & Limits ...................................24

5.9 Transformer Nameplate..................................24

5.10 Regional ......................................................27

5.11 Display.........................................................28

5.12 OLTC ...........................................................29

5.13 Administrative Settings ................................30

5.14 Quick Test Setup ..........................................30

5.15 Test in Progress ............................................31

5.16 Test Failed ....................................................31

5.17 Test Success .................................................32

5.18 OLTC Tap Change Home Screen...................34

5.19 New Test Plan ..............................................36

5.20 Auto OLTC Test in Progress...........................40

5.21 Test failed ....................................................41

5.22 Test plan results ...........................................42

Information subject to change without notice 5

Contents

5.23 Magnetic Balance Test Setup........................44

5.24 Results.........................................................48

5.25 Simulation Mode .........................................51

5.26 PowerDB 3Ø Form ......................................52

6 Service.............................................................54

6.1 Troubleshooting.............................................54

6.2 Maintenance..................................................55

6.3 Calibration.....................................................55

6.4 Repairs...........................................................55

1INTRODUCTION

6 TTRU3 User Manual www.megger.com

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 TTRU3 ratio meter test set is a fully automatic,

self-checking, menu-driven turns ratiometer. The

test set measures the turns ratio, vector relationship,

excitation current as well as transformer diagnostic

health indicators of power, distribution, and instru-

ment transformers. The design of this instrument is

such that it operates properly, independent of line

voltage quality and frequency. This allows use of any

generator driven power source of 500W or higher.

The test set is a lightweight portable instrument

housed in a sturdy plastic case and comes complete

with a canvas carrying bag to hold all accessories.

The test set can be used to test single-phase and

three-phase transformers, both with and without

taps in accordance with the requirements of the IEEE

C57.12.90 – 2013 and IEC 60076-1 standards. For

three-phase measurements, the test set is connected

to all three phases of the transformer to be tested.

The TTRU3 applies all three phases simultaneously

which permits automatic measurement of all phases

without changing connections. The TTRU3 is also

designed to operate single phase on three phase

transformers to help isolate transformer phase re-

lated issues. The TTRU3 measures turns ratio, phase

deviation and excitation current readings which

are displayed on the built in 7 inch color display or

customer PC.

1.3 Step Up vs Step Down

Unlike other transformer ratiometers, the TTRU3

operates in both step up and step down ratio mode.

Step down ratio excites the primary and measures

the induced voltage on the secondary, while step

up excites the secondary and measures the induced

voltage on the primary.

The advantage to step up ratio testing is the ability

to overcome voltage dependence exhibited by large

transformers. As transformers grow in size, more

voltage is required to generate ﬂux. The TTRU3

manages this electrical phenomenon by using the

transformers construction to achieve sufﬁcient ﬂux.

1.4 Model Variation & Accessories

The TTRU3 is available with different hardware

and software conﬁgurations. Verify the model you

received is the model that was ordered by observing

the labels on the outside of the instrument and the

version information displayed on the Help screen.

Use the ordering information table below to conﬁrm

that all included accessories, optional accessories,

and required accessories were delivered with your

TTRU3.

ORDERING INFORMATION

Item (Qty) Cat. No. Item (Qty) Cat. No.

3Ø Transformer Turns Ratio Test Set

TTRU3-EXP

TTRU3-PRO

TTRU3-ADV

ADV/PRO Software Options

TTRU3-EXP includes all software options and will receive

automatic activation of new features upon their release

Included Accessories All Automation SW SW-AUTOKIT

AC Adapters & Power Cord - 2.5m (8ft) 2009-874 PowerDB Control SW-POWERDB

USB 2.0 Cable CA-USB Auto OLTC SW-AUTOOLTC

OLTC Tap Changer cable - 9m (30ft) 1011-622 Custom App Control SW-CUSTOMAPP

Cable bag - backpack 2012-180 All Versatile SW SW-VERSATILEKIT

Ground Cable - 5m (16ft) 1011-352 Phase Shifting SW-PHASESHIFT

Thumb Drive 1011-585 Magnetic Balance SW-MAGNETICBAL

Triple Function Pen 2011-538 Optional Hardware Accessories

Required Lead Accessories 1:1 Test Jig 2005-249

Lead P/Ns 2008-XXX-XX (8 total) can be used with the TTRU3 and qual-

ify as required accessories Safety Beacon – 18m (60ft) 1004-639

3Ø universal shielded test lead sets compatible with MTO3XX,

MWA3XX, TTRU3 instruments (up to 10A max), complete with

color-coded Kelvin Clamps: Choose Kit or mix & match H & X

Transit Case (for instrument) 2012-236

TRS1+ Calibration Standard TRS1PLUS

5m (15ft) H & X 2008-15KIT2 TRS1D Calibration Standard TRS1D

9m (30ft) H & X 2008-30KIT2 Calibration Certiﬁcate CERT-NIST

18m (60ft) H & X 2008-60KIT2 USB Printer 90029-573

30m (100ft) H & 18m (60ft) X 2008-100KIT2 USB Printer Paper (x48 rolls) 90029-573-P

5m (15ft) H 2008-300-15 OLTC Tap Changer cable

adapters 1011-622-A

5m (15ft) X 2008-301-15 Optional Lead Accessories

9m (30ft) H 2008-300-30 9m (30ft) H extensions 2008-300-30X

9m (30ft) X 2008-301-30 9m (30ft) X extensions 2008-301-30X

18m (60ft) H 2008-300-60 9m (30ft) H &

9m (30ft) X extensions 2008-30XKIT2

18m (60ft) X 2008-301-60

30m (100ft) H 2008-300-100

Introduction

Information subject to change without notice 7

6. Fan

Automatically enabled when internal tempera-

ture exceeds factory limit.

7. Warning Indicator

Indicates when voltage is applied to test leads.

8. Manual OLTC Control Switch

Controls connected OLTC tap changer up/down.

Requires OLTC cable connected to transformer.

9. Touchscreen

Primary GUI control interface. Designed for out-

door (1100 NITS) and industrial environments.

10. Rotary and Directional Control Knob

Supplemental GUI control interface.

1.5 Top Panel

1. Speaker

Used for sounding countdown for test.

2. AUX Port

Used for connecting auxiliary equipment.

3. USB On the Go

TTRU3 appears as a thumb drive containing PC

SW, user manual, and data sheet.

Enables PC Control after PC SW Installed.

4. USB A

Print, export

5. Emergency Stop

Used to immediately interrupt voltage output.

Prevents tests from starting if engaged.

Rotate clockwise to disengage.

Introduction

8 TTRU3 User Manual us.megger.com

Information subject to change without notice 9

15. Beacon Connection

Optional accessory

Functions similar to Warning Indicator

16. Side panel reference

Quick reference for the various connections

1.6 Side Panel

11. Power Input

IEC 320 interface to mains power.

Integrated fuse holder and ﬁlter.

O = Off

I = On

12. OLTC Connection

Used in conjunction with Manual OLTC Control

13. Ground

14. Lead Connections

Latching connectors (press tab to release)

Color coded windings

silver/black for primary/secondary

Color coded phases

red, gold, blue, white

Introduction

18. Feet

Rotate out to provide a better viewing angle.

17. Quick Start Guide

Safety and connection reference in lid.

1.7 Quick Start Guide

Introduction

10 TTRU3 User Manual us.megger.com

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