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T&R TPT9000 Operating And Maintenance Manual

Transformer polarity tester
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OPERATING AND MAINTENANCE MANUAL
Product:
Type:
DESIGNED AND MANUFACTURED BY:
T & R Test Equipment Limited
15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom
Telephone: 01483 207428
Email:
sales@trtest.com
Web: www.trtest.com
Transformer Polarity Tester
TPT9000

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Summary of Contents for T&R TPT9000

  • Page 1 OPERATING AND MAINTENANCE MANUAL Product: Transformer Polarity Tester Type: TPT9000 DESIGNED AND MANUFACTURED BY: T & R Test Equipment Limited 15-16 Woodbridge Meadows, Guildford, Surrey, GU1 1BJ, United Kingdom Telephone: 01483 207428 Email: sales@trtest.com Web: www.trtest.com...
  • Page 2 GENERAL SAFETY STATEMENT WARNING The following safety precautions should be reviewed to avoid injury to the user and damage to the product (and other products connected to it). To avoid potential hazards only use this product as specified. • Only suitably qualified personnel should use this equipment.
  • Page 3 Do not operate the unit in an explosive atmosphere. • Warnings from cardiac pacemaker manufacturers state that strong magnetic fields may affect operation. The TPT9000 may induce large magnetic fields in transformers and should therefore not be operated by, or in the vicinity of persons fitted with cardiac pacemakers or any other electronic or electrical medical implants.
  • Page 4 SAFETY TERMS AND SYMBOLS The following safety symbols appear on the equipment: WARNING – Refer to manual Test Button...

  • Page 5: Table Of Contents

    CONTENTS DESCRIPTION OF EQUIPMENT Connections, controls & display 1.1.1 LED messages 1.2.1 Environment 1.2.2 Supply requirements 1.2.3 Connection cable ratings 1.2.3 Overload protection Theory of Operation Main current output APPLICATIONS Transformer Testing 3.1.1 CT Testing 3.1.2 Transformer Testing 3.1.3 High Primary Impedance Transformer Testing MAINTAINANCE Replacing the Battery STANDARD ACCESSORIES...

  • Page 6: Description Of Equipment

    The TPT9000 is designed to be used on ‘dead’ systems (i.e., no externally supplied voltages are present on the test object). Do not connect the TPT9000 to a live system. Always check that the power to the device under test is off and the circuit is isolated before making any connections.

  • Page 7: Connections, Controls & Display

    Connections, controls & display Figure 1.1 TPT9000...
  • Page 8 Error LED Indicates that the test transformer has not been connected properly Test button Switches the unit on and starts a test Magnet For securing the TPT9000 while testing Battery cover Remove cover to replace the battery...
  • Page 9 Figure 1.2 Proving Unit Ref Item Function Polarity Switch Switch test polarity between Forward and Reverse Connectors Connectors to fit the proving unit into the TPT9000 terminals.

  • Page 10: Led Messages

    Figure 1.5 Amber LED 1 second flash The Amber LED light for 1 second when the TPT9000 has carried out a test on the test transformer but no response has been detected on the return connections.
  • Page 11 Note that the TPT9000 cannot test auto transformers. Figure 1.7 Amber LED 1 second flash The Battery Low LED will light up for 1 second when the TPT9000 detects that the internal 9V battery voltage has dropped below a...

  • Page 12: Environment

    Protection rating: IP20 in use 1.2.2 Supply requirements The TPT9000 requires a single PP3 9V battery to operate. The battery level is automatically monitored, the device will not perform a test if the battery voltage has dropped below a useable level.

  • Page 13: Theory Of Operation

    Amber ERROR LED will flash rapidly. If no connection is detected between the two windings the TPT9000 will inject a small pulse of current into the Primary winding. The unit then waits for a resulting pulse on the Secondary winding.
  • Page 14 The function of the TPT9000 can be checked using the included proving unit. Fit the proving unit into the output terminals of the TPT9000. The switch on the front of the proving unit can be set so that it appears as either a forward or reverse connected transformer.

  • Page 15: Applications

    APPLICATIONS This chapter describes how to use the TPT9000 to test different types of transformers. Transformer Testing 3.1.1 CT Testing Figure 2.1 TPT9000 connections to a test CT ▪ Check the CT for Primary polarity markings. If the CT has been marked P1 and P2 or the direction of the current through the CT is known, this should be observed when connecting the TPT9000.
  • Page 16 ▪ Press the test button on the TPT9000. ▪ The TPT9000 will first test to see if the test transformer has been connected correctly. If the Error led illuminates check all the connections to the test transformer are correct.

  • Page 17: Transformer Testing

    Connect the Primary in the correct polarity as shown above. Connect the Brown P1 wire from the TPT9000 to the P1 terminal of the test transformer. Connect the Blue P2 wire from the TPT9000 to the P2 terminal of the test transformer.
  • Page 18 Connect the Secondary in the correct polarity as shown above. Connect the Red S1 wire from the TPT9000 to the S1 terminal of the test transformer. Connect the Black S2 wire from the TPT9000 to the S2 terminal of the test transformer.

  • Page 19: High Primary Impedance Transformer Testing

    3.1.3 High Primary Impedance Transformer Testing Figure 2.3 TPT9000 connections to a test transformer with a high impedance Primary winding Some transformers have a very high primary winding impedance. The voltage of the injected current may be too low to energise the transformer.
  • Page 20 ▪ The TPT9000 will display the result of the test. ▪ The TPT9000 will first test to see if the test transformer has been connected correctly. If the Error led illuminates check if the connections to the test transformer are correct.

  • Page 21: Maintainance

    WARNING removed from its case. Replacing the Battery ▪ Remove the test leads form the TPT9000. ▪ Remove the battery cover from the bottom of the case. ▪ Remove and disconnect the old battery from the unit.

  • Page 22: Standard Accessories

    STANDARD ACCESSORIES Spare fuses supplied a. 4 off T0.5A 20mm lead fuses. Standard accessories supplied a. Proving unit (part number A249-0001). b. 1 off 1m Black fused lead (part number S000-0768). c. 1 off 1m Red fused lead (part number S000-0769). d.

  • Page 23: Revision

    REVISION Product / Type: Transformer polarity tester / TPT9000 File: OM0035-1.docx Author: G. Bond Issue / Date: 1 / 20/07/21 Modified By: Checked By: N. Eldridge Date: 15/12/2021...

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