Biddle 220015_UG 电路图.pdf

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1、AVTM22-15Ja Rev A May 2005 15 kV DC Dielectric Test Set Catalog No. 220015 Series HIGH-VOLTAGE EQUIPMENT PLEASE READ CAREFULLY BEFORE OPERATING Safety is the responsibility of the user APARATO DE VOLTAJE ALTO SIRVANSE LEER ESTE LIBRO CON CUIDADO ANTES OE OPERARLO La seguridad es el cargo del operado

2、r M RadioFans.CN 收音机爱 好者资料库 Copyright 1985-2005 by Megger. All rights reserved. The information presented in this manual is believed to be adequate for the intended use of the product. If the product or its individual instruments are used for purposes other than those specified herein, confirmation

3、of their validity and suitability must be obtained from Megger. Specifications are subject to change without notice. M Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown, PA 19403-2329 USA Tel: 610-676-8500 Fax: 610-676-8610 RadioFans.CN 收音机爱 好者资料库 i AVTM22-15Ja Rev. A May 2005 Ta

4、ble of Contents 1 INTRODUCTION.1 2 SAFETY PRECAUTIONS.3 3 RECEIVING INSTRUCTIONS.7 4 SPECIFICATIONS.9 5 DESCRIPTION.15 General.15 Electrical.15 Power Supply Option.17 Overcurrent and Overvoltage Trip.18 6 CONTROL AND CONNECTOR IDENTIFICATION.25 7 SETTING UP.27 Preparation.27 Selection of Location.27

5、 Connections Procedure.28 Clearances.29 Power Supply Option, Catalog No. 220015-47.30 8 OPERATION.35 Test Procedure.35 Breakdown of Test Item.36 Normal Shutdown Procedure.37 Interrupting a Test.37 9 OPERATION NOTES.39 Line Voltage.39 Meter Range Settings During Transit.39 Stabilizing Switch.40 Stabi

6、lizing Switch (-50 Option).40 Use of Guard.41 Voltage Control Scale.41 Use of Regulation Curve (-50 Option).42 Step Voltage Testing.42 Fault Locating (Breakdown Testing).42 External Current Meter.44 RadioFans.CN 收音机爱 好者资料库 M ii AVTM22-15Ja Rev. A May 2005 10 APPLICATION NOTES.47 Theory of Insulation

7、 Testing.47 Applying the Test Set to Grounded Test Object.48 Three-Terminal vs. Two-Terminal Tests.49 Measuring an Ungrounded Test Item.49 Generalized Combined 2 and 3 Terminal Measurement.51 11 ROUTINE MAINTENANCE.53 Introduction.53 Inspection and Maintenance Procedure.53 12 TROUBLESHOOTING AND REP

8、AIR.57 General.57 Case Repairs.58 Repairs to Components of Chassis And Panel.58 Changing Line Voltage Tap (-47 Models Only).59 Replacement of Output Cable W101.59 Replacement of Meters or Meter Amplifier Board.60 Replacement of Current Meter Range Circuit.60 Replacement of Voltmeter Range Circuit.60

9、 Replacement of Stabilizing Switch S1.61 Replacement of Circuit Breakers.61 Replacement of Voltage Control Autotransformer T1.62 Replacement of the K2 Assembly.62 Replacement of Chassis-Mounted Assemblies.62 Replacement of Circuit Card U2.63 Calibration of Voltmeter.63 Calibration of Current Meter.6

10、4 Adjustment of R1 in Stabilization Network (-50 Option).66 Catalog No. 220015-50.66 Catalog No. 220015-47,-50.67 Trouble Location Chart.68 13 PERFORMANCE CHECK.73 14 PARTS LIST.75 15 WARRANTY AND REPAIRS.77 Warranty.77 Repairs.77 iii AVTM22-15Ja Rev. A May 2005 List of Figures Figure a: The Megger

11、Catalog No. 220015 DC Dielectric Test Set.2 Figure 1: Schematic Diagram of Catalog No. 220015.19 Figure 2: Schematic Diagram of Catalog No. 220015-50.20 Figure 3: Schematic Diagram of Catalog No. 220015-42.21 Figure 4: Schematic Diagram of Catalog No. 220015-43.22 Figure 5: Schematic Diagram of Cata

12、log No. 220015-101.23 Figure 6A: Overall View of Catalog No. 220015.25 Figure 6B: Panel View of Catalog No. 220015.26 Figure 7: Testing in a Substation.31 Figure 8: Testing Parking Lot Lighting; the Test Set Shown is Operating from an Inverter.32 Figure 9: Testing Transformer Terminals.33 Figure 10:

13、 DC Motor test setup.34 Figure 11: Generator test setup.34 Figure 12: Regulation Curves with Stabilizer out, 120V Supply, -50 Option.44 Figure 13: Typical Guard Connection to Cable Pothead.45 Figure 14: Guard Connection for a Typical Cable Test.45 Figure 15: Typical Guard Connection for an Oil Circu

14、it Breaker.46 Figure 16: Typical Guard Connection for Transformer Test.46 Figure 17: Two-Winding Transformer in Three-Terminal Form.50 Figure 18: Interior Views.70 Figure 19: Connections for Calibration of Voltmeter.71 Figure 20: Connections for Calibration of the Current Meter.71 M iv AVTM22-15Ja R

15、ev. A May 2005 List of Tables Table 1: Minimum Air Clearances.29 Table 2: Measurements of Resistance.50 Table 3: Trouble Location.68 1 AVTM22-15Ja Rev. A May 2005 1 INTRODUCTION This instruction manual is intended as a guide to the operation and maintenance of the portable Dielectric Test Set, Megge

16、r Catalog No. 220015 series.* References in this manual to optional functions and equipment may be disregarded when such information does not apply to the Test Set in use. The instructions and suggestions provided in this manual anticipate the normal use of the Dielectric Test Set for testing electr

17、ical insulation systems on such equipment as motors, generators, bushings and cables. These tests which are based on measurement of the applied dc voltage, the resulting current and the manner in which current varies with time, provide data that indicate the condition of the insulation system of the

18、 unit being tested. When these data are recorded on graph paper, such as Megger Kilovolt-Megohm Paper (Part No. 220000), the shape of the curve made by connecting the plotted points will aid in evaluating the conditions of the insulation system. Information on the interpretation of observed data and

19、 guides for test voltage and time are given in Section 10 of this manual. The basic available options covered by this manual are: -42 Adjustable overcurrent trip setting on microammeter. -43 Adjustable overvoltage trip setting on kilovoltmeter. -47 Operation from input line voltage other than nomina

20、l 115 volts (Specify voltage from 100 to 240 volts). -50 Internal voltage stabilization circuits to suppress input transient voltages. * This manual is intended for use with sets manufactured after January 1985. M 2 AVTM22-15Ja Rev. A May 2005 Figure a: The Megger Catalog No. 220015 DC Dielectric Te

21、st Set 3 AVTM22-15Ja Rev. A May 2005 2 SAFETY PRECAUTIONS SAFETY IS THE RESPONSIBILITY OF THE USER LA SEGURIDAD ES LA RESPONSABILIDAD DEL OPERADOR The Test Set and the equipment to which it is connected are a source of high-voltage electrical energy. All persons performing or assisting in the tests

22、must use all practical safety precautions to prevent contact with energized parts of the test equipment and associated circuits. Persons actually engaged in the test must stand clear of all parts of the complete high- voltage circuit unless the Test Set is de-energized and all parts of the test circ

23、uit are grounded. Persons not directly associated with the work must be kept away from test activities by suitable barriers, barricades or warnings. The Test Set panel must be connected to a reliable local ground to prevent possible shock danger to the operator. Since the energized test setup may in

24、duce a static voltage charge on nearby insulated objects, including people, all insulated objects must be grounded or kept at least two feet (61 cm) from the energized structure. G CAUTION! Never connect the Test Set to energized equipment or use the Test Set in an explosive atmosphere. All apparatu

25、s to be tested should be bonded to ground except during the actual test. Note that even isolated conductors may develop static voltage with respect to ground due to nearby electric fields, wind friction or passing electrified clouds. Test connections should be made with the ground bonds in place. M

26、4 AVTM22-15Ja Rev. A May 2005 At the completion of a test, after the power source has been shut down and the Test Set kilovoltmeter reads zero, all energized parts of the test setup must be short-circuited by means of a safety grounding stick (hot stick). Ground bonds should then be applied to the e

27、quipment that was tested. These bonds should be left in place until access to the equipment is again required. If the Test Set is operated in accordance with the safety precautions noted above and in Sections 7 and 8, and if all grounds are correctly made, rubber gloves are not necessary. As a routi

28、ne safety procedure however, some users require that rubber gloves be worn not only when making connections to the high-voltage terminals, but also when manipulating controls. Megger considers this an excellent safety practice. Megger strongly recommends the general safety practices contained in IEE

29、E Std. 510 IEEE Recommended Practices for Safety in High-Voltage and High-Power Testing as a guide for all high-voltage testing. Do not, however, use this standard to reduce any of the precautions given in this manual. HEART PACEMAKERS High-voltage discharges and other sources of strong electric or

30、magnetic fields may interfere with the proper functioning of heart pacemakers. Personnel using heart pacemakers should obtain expert advice on the possible risks before operating this equipment or being close to the equipment during operation. OTHER PRECAUTIONS ? Be especially careful when testing a

31、pparatus having high capacitance such as cables. These items store a dangerous charge, even at low voltage. ? Identify apparatus terminals and verify apparatus ground prior to making connections. SAFETY PRECAUTIONS 5 AVTM21-415Ja Rev. A May 2005 F WARNING! Do not use the Cat. No. 220015 Series Test Set for any purpose not described in this Instruction Manual, and do not use accessory items (cables, grounding sticks, etc.) for any purpose except with the specified equipment. ? Read and