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Voltech AT3600 User Manual

Ac interface fixture
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VOLTECH INSTRUMENTS
AC Interface Fixture
User Manual

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Summary of Contents for Voltech AT3600

  • Page 1 VOLTECH INSTRUMENTS AC Interface Fixture User Manual...
  • Page 2 Voltech Instruments is committed to a policy of continuous product development. Hence product specification and the information given in this manual are subject to change without notice. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by means electronic, mechanical photocopying, recording or otherwise, without prior written permission of Voltech Instruments.
  • Page 3 DANGER OF ELECTRIC SHOCK Only qualified personnel should install this equipment, after reading and understanding this user manual. If in doubt, consult your supplier. Please consult the safety information section of this user manual before installation and use. RISQUE D'ELECTROCUTION L'installation de cet équipement ne doit être confiée qu'à...

  • Page 4: Table Of Contents

    Contents 1. Introduction ................6 1.1. Features & Abilities ............................. 6 1.2. Package Contents .............................. 7 1.3. Choosing an AC Source ............................. 8 1.4. Choosing step-up or step-down Transformer ....................12 1.5. Summary of Advantages & Disadvantages ...................... 16 1.6. Operating Description ............................17 2.
  • Page 5 7.4. Compliance with EN954 ........................... 56 AC I 98-072 - 5 - OLTECH NTERFACE ANUAL PAGE...

  • Page 6: Introduction

    Thank you for choosing to use this Voltech product. If you experience any difficulty during installation or use of the Voltech AC Interface or are unsure of any of its features or abilities, please do not hesitate to contact either your local Voltech supplier or one of our Voltech main service centres.

  • Page 7: Package Contents

    For use during program design, or when the transformer does not have existing fixturing. One black (Voltech# 78-067) and one red (Voltech# 78-068) 4mm safety to 4mm stackable AC test leads For connecting the 'External Source Output' connectors of the Interface to the test fixture.

  • Page 8: Choosing An Ac Source

    (+/-10Vpk) (x 50) A power amplifier is Voltech’s preferred choice of an external AC source to be used with the AT3600/AT5600 transformer tester and the AC Interface. Using a power amplifier, the AT3600/AT5600 will: • Control the ramp-up and ramp-down of voltage to reduce settling time and optimise test speed.
  • Page 9 1.3.1 Worked Example of Chroma 61602 (CT10-20 module not shown fitted, but will be required) AC I 98-072 OLTECH NTERFACE ANUAL PAGE...
  • Page 10 1.3.2 AC Source and STEP-UP UP Transformer combined Note: When using an Amplifier AND an additional external step-up transformer connected to the output of an Amplifier to increase the output voltage, a non-polarised capacitor must be wired in series with the output of the Amplifier and the drive of the step-up transformer due to offsets in the Amplifier which cannot be trimmed.
  • Page 11 1.3.3 Worked Example of Chroma 61602 + Chroma A615003 The same blocking capacitor is also needed , even if using off the shelf solutions. Consider the below example of the Chroma 61602 Amp (0-300V) and the associated A615003 300-600V transformer accessory. In this case, the blocking capacitor is still needed Using 50Hz, 500V, 0.3Amps, as test conditions, and 2:1 for the step-up ratio of the A615003, the capacitor need is 76uF, 50V In this case we have used a general purpose, commonly available KEMET -...

  • Page 12: Choosing Step-Up Or Step-Down Transformer

    A step-up or step-down transformer provides good control but cannot boost the power available from the AT3600/AT5600. Using a good quality toroidal transformer, it may be possible to provide 540V @ 1A or 135V @ 4A, for example, but only at up to 25 W.
  • Page 13 1.4.1 Tip: Using multiple step-up transformers The simplest, easiest choice of step-up transformer is as above – a 1:3 transformer, with a 200 V rated primary, and 600 V rated secondary However, if a 600V rated transformer is not available, it is also possible to use multiple step-up Transformers, with the primaries in parallel or series, and all the secondaries in series.
  • Page 14 Primaries in Series, Secondaries in series 3 off 24 – 230 transformers were used. The 3 x 24 V Primaries are in series, so that the input voltage would be comfortably above 50V, up to a max on 72 Volts The 3 x 230 V secondaries are in series –...
  • Page 15 Primaries in Parallel, Secondaries in series 3 off 110 – 230 transformers were used. The 3 x 110 V Primaries are in parallel, so that the input voltage would be comfortably above 50V, and with 110V max The 3 x 230 V secondaries are in series – giving 690V output This can be considered (and programmed into the editor as “At output + Transformer”) as a 110 –...

  • Page 16: Summary Of Advantages & Disadvantages

    Controlled turn-on for reduced inrush current Trimmed output voltage Flexible voltage and frequency Output transformer Simple in use; no set-up errors Power limited to AT3600/AT5600 generator maximum (25 W) Controlled turn-on for reduced inrush current Trimmed output voltage Flexible voltage and frequency...

  • Page 17: Operating Description

    The ’AT Transformer Drive Output’ sockets are used to drive a step-up or step-down transformer when that type of source has been chosen. The cable fitted to the ’AT Peripheral Port’ gland must be fitted to the peripheral port of the AT3600/AT5600. This port supplies power and control signals to the AC Interface.

  • Page 18: Installation

    1. Switch off the AT3600/AT5600 and remove any test fixtures. 2. Read and adhere to the safety information section of this manual. 3. Fit the AC Interface Fixture to the rear of the AT3600/AT5600’s top platter and twist down the locking knobs.

  • Page 19: Power Amplifier Or Source With On / Off Control

    2.2. P OWER MPLIFIER OR OURCE WITH ONTROL 1. Switch off the power amplifier or AC source. 2. Connect the power output of the AC source to the sockets marked 'Input from External Source', using the red and black leads supplied. Observe the polarity of the connections. The source low should be connected to the black socket using the black lead.

  • Page 20: At Output Transformer

    2.3. AT O UTPUT RANSFORMER 1. Connect the primary of the transformer to the sockets marked 'AT Transformer Drive Output', using the red and black leads supplied. 2. Connect the secondary of the transformer to the sockets marked 'Input from External Source', using the red and black leads supplied.

  • Page 21: Connectiosn To The Test Fixture

    Source Output to Fixture' sockets of the AC Interface. These connections will provide the power for testing. Sense connections to nodes on the fixture must also be made, so that the AT3600/AT5600 can measure and trim the voltage at the terminals of the winding under test.
  • Page 22 If you are using the universal fixture (# 91-186) , the AC Interface output leads can be stacked into the sockets on their required nodes Below shows a simple step up with the AC interface connected to the power terminals on nodes 17+19 Kelvin leads are then used to connect to the unit under test.

  • Page 23: Using The At Editor Software

    This source type is a transformer that may be used to boost the voltage or current that is produced by the internal high-power generator of the AT3600/AT5600. For example, a transformer could be used to either step up the AT3600/AT5600’s voltage or provide a higher current at lower voltages.
  • Page 24 1, Enter a friendly name for your AC source in “Source Type” 2, From the ‘Source Type’ drop-down menu, select the appropriate source type = “AT Output + Transformer”. 3, Set the voltage turns ratio of your transformer The turns ratio in the editor program should be roughly accurate but does not have to be exact as the AT will constantly measure the applied output of the AC INTERFACE on the AT Test nodes it is connected to, and constantly trim the input to the step-up transformer during the test to give your requested steady test conditions.
  • Page 25 You can modify the configuration of an existing source by highlighting its name, modifying the configuration details, and clicking ‘Save’ again. To delete a source, highlight its name, and click on ‘Delete.’ Once you have configured your external AC source properly, click on ‘OK' to save your set-up or choose 'Cancel' to discard any changes that you have made.
  • Page 26 The benefits are that: The AT3600/AT5600 will trim the output voltage during testing, so that the voltage across the test piece will always be at the programmed level, even if the gain of the source drifts or the impedances of the test parts are different.
  • Page 27 You can modify the configuration of an existing source by highlighting its name, modifying the configuration details, and clicking ‘Save’ again. IMPORTANT If you are using an Amplifier AND a step-up transformer together (see 1.3.1) then this gain must be the gain of the entire system.

  • Page 28: Current Sense Method

    The AC Interface measures current by using a current sense method. The current is measured via a current transformer, which is fitted to the AC Interface. You may enter the current transformer ratio into the dialogue box, so that the AT3600/AT5600 will report the correctly scaled current.

  • Page 29: Selection Of External Ac Source In Pc Editor

    3.3. S AC S PC E ELECTION OF XTERNAL OURCE IN DITOR Finally, before you can use your external AC source with the PC Editor test program, you must select the source that you have configured in the Editor program options. From the ‘Program’...

  • Page 30: Testing The Complete System

    OMPLETE SYSTEM To ensure that your complete test system provides operator safety and protects all components (including the AT3600/AT5600) from damage, it is vital that all source control methods that you have used are working properly. Ensure that all connections are made as specified in this manual.
  • Page 31 4, Add a VOCX test, with the same 19/A and 17/B nodes used for BOTH Energised and Measured terminals In this example we have programmed a sequence of 3 VOCX tests at 200, 400 and 600 Volts 5, Check your AC SOURCE settings in SET UP are correct. 6, Run the program from the AT Editor.
  • Page 32 If you see warning messages on the front panel display of the AT3600/AT5600 (see the safety section of this manual), it is likely that high voltage is present. Do not touch the fixture. Follow the instructions given on the panel. The source controls are not working properly, and you should investigate.

  • Page 33: Use Of X Tests In An At Editor Atp Program

    3.5. U SE OF ESTS IN AN DITOR PROGRAM Once the above tests have passed you can now add the “X tests” (MAGX VOCX WATX and STRX) into a test program. These are programmed in the same way as the “on board” Class- D tests (VOC MAGI WATT STRW) but will allow you to use the higher excitation voltages.

  • Page 34: Integration Of Ac Interface Tests With Ir, Hpdc, Hpac, Dcrt, Acrt, Dcvb, Acvb Tests

    AT tests; IR, HPDC, HPAC, DCRT, ACRT, DCVB, ACVB Tests (High Voltage Tests) IMPORTANT: Voltech AT5600 / AT3600 programs that include any of these tests should be written such that the AC Interface output (and connected winding) is only ever used as the LO terminal on any HI POT test, The AC interface should NEVER be connected to a node that is also used by a test, in the same program, as a HI terminal for a HI POT test.

  • Page 35: Integration Of Ac Interface Tests With Ilk, Surg, Magi, Strw, Watt, Voc Tests

    This applies when writing test programs combining the AC Interface “X” tests with any of the following standard “on board” AT3600 or AT5600 tests; ILK, SURG, MAGI, STRW, WATT, VOC Tests These tests must not be used on any winding on a component to which the AC Interface is attached.

  • Page 36: Technical Information

    True Kelvin leads, 2A rated (Voltech part no. 78-028) • • Flying lead connection post (Voltech part no. 78-026) • Universal lead set (Voltech part no. 78-030), contains ten of each of: True Kelvin leads Flying lead connection post non-Kelvin croc-clip leads Grabber clip leads •...

  • Page 37: Details Of Connector Functions

    These connections are used to supply the signal from the AC Interface to the part under test. Note that when the AT3600/AT5600 runs a hi-pot test as part of a test program, up to 7kV could be present on these connections.
  • Page 38 AT3600/AT5600 is performing high-voltage tests like hi-pot, HPAC. It is normally not necessary to use an external isolator, and users are strongly urged to contact Voltech before doing so. If you do wish to use an external isolating device, then this signal may be used to control that device.
  • Page 39 The diagram above shows the signal levels (high or low) and the times between them from when the AT3600/AT5600 asserts its enable signal. The Enable In (from AT) is not visible on any ACIF ports. It is a control line that comes in from the AT3600/AT5600 peripheral port.
  • Page 40 +15V (Pin 4), -15V (Pin 6) This is a +15V and -15V supply. See note below for full specification. 0V (Pin 5) This is the 0V reference for all other connections on the source control port. Note: The +/-15V supply is intended for use with a current sensing module, e.g., a LEM module, which requires power to deliver current to the measurement device.
  • Page 41 This part of the fixture will have a factory-fitted cable. It is not intended to be replaced by the end-user. This cable has a 15-way D connector on the end that must be plugged into the AT3600/AT5600 peripheral port. All signals to and from the AT3600/AT5600, including the power supply for the AC Interface Fixture’s internal...

  • Page 42: Using A Current Transformer

    RANSFORMER The Voltech CT10-20 Current Transformer The CT10-20 is a current transformer module that is supplied with the Voltech AC Interface Fixture to enable current measurements to be made with the AT3600/AT5600. The name is derived from its basic specification of 10Arms and a ratio of 1:20.
  • Page 43 A CT has a proportion of the primary current flowing in the secondary that is defined by the CT turns ratio. The Voltech CT10-20 has a ratio of 1:20, so whatever current flows in the primary, 1/20 of that current must flow in the secondary.

  • Page 44: Choosing An At Output Transformer

    RANSFORMER A step-up or step-down transformer can be used as an AC source in conjunction with the AC Interface. The transformer can be used to either increase the voltage or the current available from the AT3600/AT5600's own internal generator. This is an extremely versatile method to use for testing transformers, providing good control and optimum test speed.

  • Page 45: Specification

    AC I ESTS VAILABLE FOR SE WITH THE NTERFACE The following tests are available for use with an external AC source, when a Voltech AC Interface is used in combination with an AT3600/AT5600: Test User Entered Test Data Measurement Range...

  • Page 46: Magx - Magnetising Current

    (Hz) is the measured current (A) During a MAGX test, the AT3600/AT5600 automatically applies the test voltage to the part under test and checks that the voltage has stabilized before recording measurements. The time that the voltage takes to stabilize will vary with the source type used and the nature of the part under test.

  • Page 47: Vocx - Open Circuit Voltage

    (Hz) is the measured voltage (V) During a VOCX test the AT3600/AT5600 automatically applies the test voltage to the part under test and checks that the voltage has stabilized before recording measurements. The time that the voltage takes to stabilize will vary with the source type used and the nature of the part under test.

  • Page 48: Strx & Watx - Stress Wattage & Wattage

    (W) is the product of MAGX and VOCX results When performing either of these tests, the AT3600/AT5600 automatically applies the test voltage to the part under test and checks that the voltage has stabilized before recording measurements.

  • Page 49: Typical External Ac Source Specification

    20Hz to 1.5 kHz. 5.6. G ENERAL Size: 290mm x 110mm x 32mm Weight: Approx. 750g Power supply: Powered by the AT3600/AT5600 Operating temperature: 0 to 40°C Storage temperature: –40 to 70°C Humidity: 10 to 90% RH, non-condensing AC I...

  • Page 50: Emc Compliance

    Declares that the product:'AC Interface' conforms with the following product specifications, when used with a Voltech AT3600/AT5600 Transformer Tester: Safety: IEC 61010-1:2010 (3 Edition) EMC: IEC 61326-1:2012, Class A, Table 1 Signed for on behalf of Voltech Instruments Dr John Ford, Managaing Director 26 June 2018 AC I 98-072 OLTECH...

  • Page 51: Emc Precautions

    AT3600/AT5600 transformer tester. Immunity The AT3600/AT5600 and AC Interface Fixture may be susceptible to fast electrical transients on the power line and electrostatic discharges, which may disrupt the operation of the unit. In the event of such an occurrence, to return the system to normal operation: Switch off the power to the AT3600/AT5600.

  • Page 52: Warranty & Service

    Voltech is not responsible for any lost profits or revenue, loss of use of software, loss of data, cost of substitute software, claims by third parties, or for other similar costs. In no case shall Voltech's liability exceed the amount of the license fee.

  • Page 53: Safety Information

    Voltech’s AC Interface Fixture can pass voltages of up to 600VRMS and 10ARMS during testing. It is essential that an approved safety interlock system, such as the Voltech light curtain, is installed and maintained in accordance with the guidelines given in the AT3600/AT5600 user manual.

  • Page 54: Error Messages

    A fault has occurred with the external source. Please check the status of the external source interface and refer to user manual. Should this error occur, check the operation and installation of the safety light curtain (see AT3600 user manual).
  • Page 55 DO NOT TOUCH THE PART UNDER TEST OR THE FIXTURE. b. Switch off the AC source. c. Switch off the AT3600. d. Check to make sure the part under test is safe to touch before removing it and powering on the AT3600 and AC source.
  • Page 56 As an extra precaution in this case, if the system is rendered unsafe, there must be a high probability that the user can avoid the hazard. The Voltech AC Interface will always meet category 3, if connected correctly to an external AC source, as described in this manual.

This manual is also suitable for:

At5600

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