Voltech - AT3600 Transformer Tester

The World Leader in Power Analyzers and Transformer Testers

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The AT3600 High Voltage Transformer
Tester

the solution to wound component testing

Superior by design, the AT3600, with its patented digital measurement techniques, has revolutionized transformer testing throughout the world. Only the AT3600 combines high and low voltage testing in one station to provide this combination of speed, accuracy, flexibility and reliability.

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Overview

The AT3600 is the most cost-effective solution for all transformer and wound component testing requirements.

Using techniques patented by Voltech. The AT3600 introduces a fast, reliable and flexible test solution for all small to medium size wound components. Offering 100% testing of production output for 100% of the required functional and safety test, the AT3600 provides complete assurance of zero-defect components. Whether used for testing manually or with automatic handling systems, the AT3600 will guarantee output quality, minimize test times and reduce costs

The unique design of the AT3600 integrates different test single sources, measuring circuits and a 20-node connection matrix together with a versatile fixture system to bring you benefits that no other instrument can offer.

* International patents: UK 2261957B, Europe
0621953B, USA US5500598

Benefits

The voltech integrated test solution saves you time and improves your product’s quality in a variety of ways:

No specialist operator training required
Reduced component handling
Consistent measurements through voltech test Fixturing
Increased test speed
Automatic test results storage
Reduced maintenance and calibration costs
Worldwide technical and service support

Using techniques patented by voltech the AT3600 and ATi introduce a fast reliable and flexible test solution for all small, medium and large wound component manufacturers.

Offering 100% testing of production output for 100% of the required functional and safety tests, the AT3600 and ATi provides complete assurance of zero-defect components.

Whether used for testing manually or with automatic handling systems, the AT3600 and ATi will guarantee output quality, minimize test times and reduce costs.

* International patents: UK 2261957B, Europe
0621953B, USA US5500598

Specification

Test

Measurement
Range
Frequency

User Entered Test Data

Test Signal

Test Frequency (4)

AR(1)

CTY

Continuity

10kΩ to 10MΩ

n/a

DC Resistance

10kΩ to 10MΩ

n/a

0.10%

Inductance (series circuit)

1nH to 1MH

1mV to 5V

20Hz to 3MHz

0.05%

Inductance (parallel circuit)

1nH to 1MH

1mV to 5V

20Hz to 3MHz

0.05%

Quality Factor

0.001 to 1000

1mV to 5V

20Hz to 3MHz

0.50%

Dissipation Factor

0.001 to 1000

1mV to 5V

20Hz to 3MHz

0.50%

RLS

Equivalent Series Resistance

10μΩ to 10MΩ

1mV to 5V

20Hz to 3MHz

0.05%

RLP

Equivalent Parallel Resistance

10μΩ to 10MΩ

1mV to 5V

20Hz to 3MHz

0.05%

Leakage Inductance

1nH to 1kH

20μA to 100mA

20Hz to 3MHz

0.10%

LLO

Leakage Inductance with user offset

1nH to 1kH

20μA to 100mA

20Hz to 3MHz

0.10%

Inter-winding Capacitance

100fF to 1mF

1mV to 5V

20Hz to 3MHz

0.10%

Turns Ratio and Phasing

1:100k to 100k:1

1mV to 5V

20Hz to 3MHz

0.10%

TRL

Turns Ratio by Inductance

30:1 to 1:30

1mV to 5V

20Hz to 3MHz

0.10%

MAGI

Magnetizing Current

1μA to 2A

1V to 270V

20Hz to 1500Hz

0.10%

MAGX

Magnetizing Current

50mA to 10A

5V to 600V

20Hz to 5kHz(2)

0.10%

(External Source)

VOC

Open Circuit Voltage

100μV to 650V(3)

1V to 270V

20Hz to 1500Hz

0.10%

VOCX

O/C Voltage (External Source)

100μV to 650V(3)

1V to 270V

20Hz to 5kHz(2)

0.10%

LVOC

Low Voltage Open Circuit

100μV to 650V(3)

1mV to 5V

20Hz to 3MHz

0.10%

Insulation Resistance

1MΩ to 100GΩ

100V to 7KV

n/a

HPDC

Hi-Pot (DC)

1μA to 3mA

100V to 7KV

n/a

3.20%

HPAC

Hi-Pot (AC)

10μA to 10mA(4)

100V to 5KV

50Hz to 1kHz

3.00%

LSB

Inductance with Bias (Series)

1nH to 1MH

1mV to 5V

20Hz to 3MHz

0.05%

DC Bias

1mA to 400mA

LPB

Inductance with Bias (Parallel)

1nH to 1MH

1mV to 5V

20Hz to 3MHz

0.05%

DC Bias

1mA to 400mA

WATT

Wattage

1mW to 40W

1V to 270V

20Hz to 1500Hz

0.30%

WATX

Wattage

1mW to 6kW

5V to 600V

20Hz to 5kHz(2)

0.30%

SURG

Surge Stress (External Source)

1mVs to 1kVs

100V to 5kV

n/a

3.00%

TRIM

Trimming Adjustment

n/a

STRW

Stress Wattage

1mW to 40W

1V to 270V

20Hz to 1500Hz

STRX

Stress Wattage (External Source)

1mW to 6kW

5V to 600V

20Hz to 5kHz(2)

DC Resistance Match

1:1000 to 1000:1

n/a

0.20%

Inductance Match

1:10000 to 10000:1

1mV to 5V

20Hz to 3MHz

0.10%

Inter-winding capacitance match

1:1000 to 1000:1

1mV to 5V

20Hz to 3MHz

0.20%

GBAL

General Longitudinal Balance

0dB to 100dB

1mV to 5V

20Hz to 3MHz

0.5dB

LBAL

Longitudinal Balance

0dB to 100dB

1mV to 5V

20Hz to 3MHz

0.5dB

ILOS

Insertion Loss

100dB to 100dB

1mV to 5V

20Hz to 3MHz

0.5dB

RESP

Frequency Response

100dB to 100dB

1mV to 5V

20Hz to 3MHz

1.0dB

RLOS

Return Loss

100dB to 100dB

1mV to 5V

20Hz to 3MHz

0.20%

Z, ZB

Impedance,

1mΩ to 1MΩ

1mV to 5V

20Hz to 3MHz

0.20%

Impedance + bias

OUT

Output to User Port

n/a

ANGL

Impedance Phase Angle

-360° to 360°

1mV to 5V

20Hz to 3MHz

0.05°

PHAS

Inter-winding Phase Test

-360° to 360°

1mV to 5V

20Hz to 3MHz

0.05°

ILK

Leakage Current Test

1μA to 10mA

1V to 270V

20Hz to 1MHz

0.50%

Notes:

1. AR = The basic relative accuracy .

2. Depends on external source type.

3. 650 Vrms for AC measurements, or 1000V for DC measurements.

4. Peak value.

5. Where used, the bias current accuracy is +/-10% of the requested value.

Line Frequency Transformers

Switched Mode Power Supplies

Chokes and Inductors

Current Transformers

Communication Transformers

AT3600 - THE automatic transformer tester is
the solution for all your transformer testing
needs.

Click on a solution to learn more...

Chokes and Inductors

Chokes and inductors are used for noise and ripple control in power supplies and other power conversion equipment.
From line chokes operating at 50-60Hz to DC-DC converters working at up to 3MHz, and operating with dc currents from 1mA to 250A, the AT3600 can perform 100% quality checks at rated operational conditions.

What’s needed to test chokes ?

A programmable impedance meter that can measure inductance (L), resistance ( ac and dc ) and Q at different voltages and frequencies.
Compensation for stray impedances.
4-wire (or Kelvin )connections for the most accurate measurements.
Measurements of insulation between windings.
Means or recording results and / or signaling a PASS or FAIL to the operator.

The AT3600 Solution

An AT3600 transformer tester coupled to a DC1000 bias unit provides:

A 0.05%, 3MHz laboratory grade LCR meter.
Up to 250A of smooth dc bias current with the DC 1000.
4-wire connections throughout
Insulation resistance tests.
PASS / FAIL indicators.
Optional PC results storage and analysis
A fast, accurate, reliable and easy-to-use test station !

Additionally, using the AT3600 with a DC1000 DC Bias unit will provide 100% testing at working conditions plus measurements of surge and Hi-pot. Plot inductance Saturation Curves using the free DC1000 PC Software.

Communication Transformers

The accuracy and high frequency performance of the AT3600 it ideal for testing audio transformers and telecommunications transformers used in modems, Ethernet adaptors and DSL filters.

What’s needed to test audio and telecom transformers ?

Making accurate measurements at high frequency
Controlling the source and load impedances
Compensation for stray impedances
Calculation of results in dB to the reference international standard

The AT3600 Solution

Fully programmable sources which provide accurate measurements up to 3MHZ
Laboratory LCR meter grade measurements (0.05% basic accuracy).
Control both source and load impedances by automatic and repeatable fixture connections.
Calculates and presents results in accordance to formulae as defined by current international standards.

Current Transformers

The AT3600 is ideal for testing current transformers because it contains an AC source that will generate a programmable constant as current to energize the CT while the AT3600 measures the open circuit voltage.

Tests up to 270V, 2A can be conducted as standard with the AT3600 or up to 600V, 10A with the AC Interface. For higher VA testing an external source can be connected and directly controlled by the AT3600.

Test Requirements

Standards such as IEC60404-2 are that measurements of core losses are made under4 constant AC current test conditions.
Voltages are often measured as a rectified mean (not rms) .
Ideally, current transformers will also be tested with constant AC current drive.

The AT3600 Solution

Constant current is fully programmable for amplitude and frequency
Simultaneous measurement of rms or rectified mean (rms scaled ) voltage
Current carefully ramped up and down under software control for optimum speed.
DC resistance, inductance, leakage inductance and Q measurements built in !
AC interface allows primary currents of up to 10A with a simple step-down transformer.

Additionally, using the AT3600 with a DC1000 DC Bias unit will provide 100% testing at working conditions plus measurements of Surge and Hi-Pot. Plot inductance Saturation Curves using the free DC1000 PC Software.

Line Frequency Transformers (laminates)

The AT36000 is perfect for testing laminate or iron-cored transformers because it has a built-in, fully programmable AC source. This allows the AT3600 transformer tester to measure magnetizing current and multiple open circuit voltages quickly and accurately.
The AT3600 can perform test of up to 270V, 2A as standard. Using the AC Interface with your AT3600, the test range can be extended up to 600V, 10A.

What’s needed to test Laminate Transformers ?

Measurements need to be carried out at the functional operating point of the transformer (e.g.110V, 60Hz) because of non-linear core characteristic (tech note library )
Switch-on surge can be large, requiring over-size source or the careful ramp-up of both current and voltage sources.
Multiple windings require connections to be moved from winding to winding for voltage measurements.
Safety Hi pot test are often required on line-frequency transformers.
The operator should be protected from the high voltages present during test.

Switched Mode Power Supply Transformers

Ferrite cored switched mode power supply transformers are used for power conversion and control in a wide variety of equipment such as power supplies, lighting ballasts, invertors and UPS. All of which demand a broad range of different tests, often carried out at different voltage and frequencies.
The AT3600 is a superb test solution for these transformers not just because of the vast range of tests that can be applied quickly and accurately, but also because it can be configured to test a completely different batch of transformers within minutes.

What’s needed to test switched mode power supply transformers ?

A programmable impedance meter that can measure inductance (L), resistance (ac and dc) and Q at different voltages and frequencies.
Multiple meters (or multiple connections ) to measure turns ratio between windings.
Means to short-circuit windings so that leakage inductance can be measured.
Compensation for stray impedances.
4-wire (or Kelvin ) connections for the most accurate measurements.
Measurements of insulation between windings.
Means of recording results and / or signaling a PASS or FAIL to the operator.

The AT3600 Solution

One integrated test station means accuracy, speed and reliability without compromise :

A 0.05%, 3MHz laboratory grade LCR meter
A20-way switching matrix.
4-wire connections throughout
An insulation resistance tester
PASS / FAIL indicators
Optional PC results storage and analysis

In addition to the following accessories, the AT3600 can be fitted with a variety of Fixtures, either custom or standard.

AC Interface Fixture

Extend the range of wound components that may be tested by the at 3600

Learn More

PC Cables

Used to connect your AT series transformer tester’s auxiliary part to a PC running the AT Editor software.

Learn More

Transit case

This high-quality, durable case will provide years of protection during movement and shipment of your AT3600. Comes with custom cut foam inserts.

Learn More

Footswitch

Minimize user fatigue, and increase efficiency with this footswitch to start each test process.

Learn More

Safety light curtain

Protect operators and reduce fatigue with this safely light curtain.

Learn More

Leadsets

A range of leads and connectors for easy connection to your AT3600.

Learn More

Test

Description

Main Application

Winding Tested

Reason for Test

CTY

Continuity

All transformers

Properly installed fixture

DC Resistance

All transformers

All windings

Properly installed fixture Correct wire used Integrity of terminations

Inductance (Series circuit)

Most transformers But usually not line frequency transformers

One winding usually the primary

Correct primary turns Right grade of core material Core correctly assembled

Inductance (Parallel circuit)

Quality Factor

Right grade of core material Core correctly assembled Check for shorted turns

RLS

Equivalent Series Resistance

RLP

Equivalent Parallel Resistance

Dissipation Factor

Leakage Inductance

SMPS transformers Communication transformers Other as applicable

Select windings

Check windings have been installed in the correct position relative to the core

LLO

Interwinding capacitance

High frequency transformers Isolating transformers

Check winding positioning Check insulation thickness between windings

Turn Ratio and Phasing

Most transformers, but usually not line frequency transformers

All winding

Check winding has correct turns and phasing

TRL

Turn Ratio by Inductance

As with Turns Ratio but used where three is poor flux linkage between windings.

All windings

Check windings have correct turns and phasing

MAGI

Magnestising Current

Usually line frequency transformers

One winding usually the primary

Correct primary turns Correct core material properly assembled

MAGX

MAGI (External Source)

VOC

Open Circuit Voltage

All other windings

Correct Secondary turns Correct phasing

VOCX

VOCX (External Source)

Insulating Resistance

All transformers

Between selected windings

Winding isolation check where safety is not involved

HDPC

Hi-Pot (DC)

All transformers especially those used for safety insulation

Between selected windings usually primary or secondary, screen and core

High voltage safety insulation

HPAC

Hi-Pot (AC)

LSB

Inductance with Bias Current(Series Circuit)

Transformers for use in application passing significant dc bias current is part of the normal operat

One winding

Correct number of turns Right grade of core material

LPB

Inductance with Bias Current (Parallel Circuit)

WATT

Wattage

50Hz Iron core transformers

One winding

Correct core material Properly assembled

WATX

Wattage (External Source)

50Hz Iron core transformers

One winding

Correct core material Properly assembled

SURG

Surge Stress Test

All transformers, especially those using fine wire

Selected winding

To identify shorted turns

TRIM

Trimming Adjustment

Transformers with variable / trimmable component

To adjust transformer to give specific measured values

OUT

Output to User Port

Allows to AT to perform external switching as part of the test program.

DC Resistance Match

SMPS, audio & telecom

All windings

Check matching between windings

Inductance Match

SMPS, audio & telecom

All windings

Check matching between windings

Capacitance Match

SMPS, audio & telecom

All windings

Check correct winding position on bobbin

GBAL

General Longitudinal Balance

Audio & telecom

Selected windings

Check common mode rejection ration

LBAL

Longitudinal Balance

Audio & telecom

Select windings

Check common mode rejection ration

ILOS

Insertion Loss

Audio & Telecom

Selected windings

Checks losses within the transformers

RESP

Frequency Response

Audio & Telecom

Selected windings

Checks losses over a range of frequencies

RLOS

Return Loss

Audio & Telecom

Selected windings

Checks losses returned by transformer

Impedance

Audio & Telecom

Selected windings

Checks impedance at given frequency

Impedance + Bias

Audio & Telecom

Selected windings

Checks impedance at given frequency

STRW

Stress Wattage

Line frequency & high frequency

One winding

Checks integrity of inter-turn insulation the magnetic material and joints

STRX

STRW (External Source)

ANGL

Impedance Phase Angle

Audio & telecom

Selected windings

Finds phases shifts between Voltage and Current on a winding

PHAS

Interwinding Phase

Test Audio & telecom

Selected windings

Measures phases shifts between a pair of windings.

ILK

Leakage Current

Medical Application

Between primary and secondary windings

Checks for a common mode current due to capacitance.

LSBX*

Induction with External Bias (Series Circuit)

Wound components that usually carry a significant DC Bias current in normal operation

Selected windings

Checks number of turns, right grade of correctly assembled core material where bias current is greater than LSB test can handle.

LPBX*

Induction with External Bias (Parallel Circuit)

Wound components that usually carry a significant DC Bias current in normal operation

Selected windings

Checks number of turns, right grade of correctly assembled core material where bias current is greater than LSB test can handle.

ZBX*

Impedance with External Bias

Audio & Telecom

Selected windings

Checks impedance at a given frequency, while applying a greater bias current than is possible with ZB test.

ACRT

Hi-Pot Ramp (AC)

All transformers especially those used for safety insulation

Between selected windings usually primary to secondary, screens and core

High voltage safety insulation

DCRT

Hi-Pot Ramp (DC)

All transformers especially those used for safety insulation

Between selected windings usually primary to secondary, screens and core

High voltage safety insulation

* These tests require the use of one or more Voltech DC1000 Precision DC Bias Current Sources.

Editor Software

Version: 3.26.21 Release Date : May, 2008

Easily design your own test programs for your AT3600 transformer tester

Learn More

Server Software

Version: 3.24.05 Release Date : May, 2008

Server software for your AT3600 that allows you to store and manage test results

Learn More

Database Connectivity Software

Version: 2.0.0 Release Date : May, 2008

Easy statistical results analysis of your AT3600 test results presented in real time

Learn More

AT3600 Firmware

Version: 3.1.6 Release Date : July, 2008

Firmware for your AT3600 transformer tester. Click learn more to see the latest features of this firmware and to download the latest version.

Learn More

Brochures and Manuals

PM6000 Brochure

1007.12 KB

Download

PM6000 Brochure

1007.12 KB

Download

AT series tests application note

3.34 MB

Download

Fixture Construction Manual

2.22 MB

Download

AC Interface User Manual

885.27 KB

Download

Safety Interlock Cable

1.18 MB

Download

AT3600 User Manual

18.02 MB

Download

AT3600 Brochure

1.65 MB

Download

Quick Start Guides

Application Notes

Turns Ratio Measurements

1 MB

Download

Turns Ratio Measurements

1 MB

Download

Transformer Basics

672 KB

Download

Transformer Basics

672 KB

Download

Database connectivity application note

928 KB

Download

Laminate Transformer Testing

1 MB

Download

Ferrite Transformer Testing

4 MB

Download

Ferrite Transformer Testing

4 MB

Download

HiPot Declaration

433 KB

Download

Shorted Turns Detection

444 KB

Download

Leakage Inductance

1 MB

Download

User Port Operation

2 MB

Download

Relay Matrix

1 MB

Download

Kelvin Connections

1 MB

Download

Server Access Queries

2 MB

Download

Constant Current Testing

751 KB

Download

Telecom / Audio Transformer Testing

402 KB

Download

Technical Library

Voltech also has an extensive technical library available to you. If you can’t find what you need here, please search our library.