•The way a transformer is handled and the procedures that are used to receive, assemble, process and test the transformer are of fundamental importance to the long life of the transformer. PROCEDURE FOR CURRENT TRANSFORMER (Factory and Site acceptance Tests) HV Tester: (0 to 5) KV (AC) VOLTAGE TRANSFORMER TESTING SWP Page 1 of 19 Standard Work Practice SP0508 Ver 7 Ergon Energy Corporation Limited ABN 50 087 646 062 1. all of the following:PURPOSE AND SCOPE The purpose of this Standard Work Practice (SWP) is to provide guidelines for testing methods for Capacitive and Inductive Voltage Transformers. Before commencement of any test make sure the surroundings near clear off from any unwanted materials etc, and make proper approach, scaffolding etc. The test laboratory of Asea Brown Boveri, S.A., Zaragoza, is fitted and equipped to carry out final tests based on the Standards IEC, UNE, EN, ANSI and IEEE applicable, until an insulation level of 145 kV in power transformers of until 40 MVA. c. Connect the megohmmeter to one terminal of the H side of the PT and the negative to one side of the X side and to ground. OPEN CIRCUIT VOLTAGE, TRANSFORMER TEST PROCEDURE Transformer failure can be the result of natural aging, premature shorting of adjacent coil wires, or overheating damage. D R A F T Doble Engineering Company 85 Walnut Street Watertown, Massachusetts 02472-4037 (USA) PN 500-0397 72A-2244 Rev. SUBJECT TERMS current transformer, potential transformer, power system testing, protective systems, relays 16. Oil tests in the shop or laboratory would be carried out at room temperature (20O C) NAME OF RESPONSIBLE PERSON A September 15, 2003 Doble Test Procedures This method statement will give a brief steps to be carried out for testing and pre- commissioning of transformers. NUMBER OF PAGES 123 19a. b. •The installation and testing of the transformer verifies its condition at the time it is ready for service as well as forming the baseline or signature and testing of existing relaying systems, which also includes periodically verifying relay settings furnished by others. Transformers have been used at powerplants since the inception of alternating-current generation, a century ago. SECURITY CLASSIFICATION OF: 17. 15. POWER TRANSFORMER - STANDARDISATION MANUAL 185 CHAPTER - 5 TRANSPORTATION, ERECTION, TESTING AND COMMISSIONING INTRODUCTION Considering main objectives of standardisation Manual, this chapter will cover important procedures, check points, directly fill the power factor test cell from the sampling facility provided on the tested power transformer. Testing procedure: The test shall be conducted in accordance with IS (Part 1): 1974. PROCEDURE . One must assure that the test cell is clean and it is a wise precaution to bleed the sampling tube to assure a representative sample. Modern transformers are a. Isolate all windings from ground. d. Increase the voltage slowly to the test … test procedure for PT insulation tests. Install a jumper across each full winding. While operating principles of transformers remain the same, the challenges of maintaining and testing transformers have evolved along with transformer design and construction. The tests this laboratory … The most common cause of transformer overheating and burnout is the result of misuse, connecting the charger to a battery system of lower voltage than specified for the charger. to carryout required test on the transformers. The InterNational Electrical Testing Association (NETA) was formed in 1972 to establish uniform testing procedures for electrical equipment and apparatus. LIMITATION OF ABSTRACT 18. NETA developed specifications for the acceptance of new electrical apparatus prior to energization and for the maintenance of existing apparatus to determine its suitability to remain in service. 1. The test voltage of 3 kV (rms) shall be applied for one minute between the terminals of the secondary windings (connected together) and earth.

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