Biddle AVTM6514J_UG 电路图.pdf

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1、AVTM6514J Rev. A March 2003 Instruction Manual AVTM6514J for Impulse Generator Catalog Nos. 651403 and 651404 High- Voltage Equipment Read the entire manual before operating. Aparato de Alto Voltaje Antes de operar este producto lea este manual enteramente. PO Box 9007 Valley Forge, PA 19485- 1007 U

2、.S.A. 610- 676- 8500 Shipping Address: Valley Forge Corporate Center 2621 Van Buren Avenue Norristown, PA 19403 U.S.A. RadioFans.CN 收音机爱 好者资料库 AVTM6514J Rev. A (03/2003) ii Copyright 2003 by Megger. All rights reserved. The information presented in this manual is believed to be adequate for the inte

3、nded use of the product. If the product or its individual instruments are used for purposes other than those specified herein, confirmation of their validity and suitability must be obtained from Megger. Specifications are subject to change without notice. RadioFans.CN 收音机爱 好者资料库 AVTM6514J Rev. A (0

4、3/2003) i Table of Contents SECTION 1. 1 introduction. 1 Receiving Instructions . 1 General Information. 1 SECTION 2. 5 Safety. 5 SECTION 3. 9 Specifications. 9 Electrical. 9 Physical. 9 Environmental. 9 SECTION 4.11 Description.11 Circuit Descriptions.11 Controls And Connectors.13 SECTION 5.15 Setu

5、p .15 SECTION 6.19 Operation.19 Operating Procedure.19 Interpreting The Output Current Meter.19 Shutdown Procedure.20 SECTION 7.21 Operation Notes .21 Theory.21 Impulse Testing .22 Operation With An Electromagnetic Impulse Detector.22 Proof Testing Cable.22 SECTION 8.23 Service.23 Maintenance.23 Per

6、formance Check.24 Troubleshooting And Repair.25 SECTION 9.29 Replaceable Parts List.29 GLOSSARY.31 RadioFans.CN 收音机爱 好者资料库 AVTM6514J Rev. A (03/2003) ii WARRANTY.33 APPENDIX.35 Brief Operating Instructions.35 FIGURE LIST Figure 1: Impulse Generator. 2 Figure 2: Schematic Diagram.12 Figure 3: Typical

7、 Fault Diagram.21 AVTM6514J Rev. A (03/2003) 1 SECTION 1 Introduction RECEIVING INSTRUCTIONS Check the equipment received against the packing list to ensure that all materials are present. Notify Megger of any shortage. Telephone (610) 676-8500. Examine the instrument for possible damage received in

8、 transit. If any damage is discovered, file a claim with the carrier at once and notify Megger or its nearest authorized sales representative, giving a detailed description of the damage. This instrument has been thoroughly tested and inspected to meet rigid specifications before being shipped. It i

9、s ready for use when set up as indicated in this manual. GENERAL INFORMATION This instruction manual describes the operation and maintenance of Impulse Generators having Catalog No. 651403 and 651404. Catalog No. 651403 is the 120 V, 50/60 Hz, 300 VA model, and Catalog No. 651404 is the 240 V, 50/60

10、 Hz, 300 VA model. The Impulse Generator produces periodic pulses up to 15 kV for locating faults in cables by the high-voltage, impulse-tracing method. No larger than a medium-sized suitcase and weighing only 41 pounds, the Impulse Generator is contained in a fiberglass carrying case that is rugged

11、 and durable to withstand transportation from site to site. See Figure 1. The Impulse Generator uses low-voltage storage capacitors on the primary side of a pulse transformer. Every six seconds, a solid-state switch discharges the capacitors into the pulse transformer, which steps the voltage up to

12、the required level. The resultant output is a high-voltage impulse with a steep front and an exponentially decaying tail an ideal waveform for cable fault location. The waveform travels along the cable until it reaches the fault, where a sparkover occurs. High-voltage sparkover causes a significant

13、current to flow, and the fault is located by detecting this current or the noise made by the sparkover. An ammeter on the Impulse Generator displays peak fault current in percentage of the available output. When the meter indicates a cable fault, its location is pinpointed by tracing the fault curre

14、nt with a detector carried along the cable path. Two such detectors are available from Megger: AVTM6514J Rev. A (03/2003) 2 Figure 1: Impulse Generator AVTM6514J Rev. A (03/2003) 3 Catalog No. 653000 Surge Detector (for direct buried cable) Catalog No. 651113 Electromagnetic Impulse Detector (for du

15、cted and buried cable) A rotary switch allows the selection of 3, 6, 9, 12, or 15 kV. The switch also has a ZERO START position which discharges the capacitors and provides a zero-voltage start-up for safety. Input and output cables are permanently attached; storage for cables is provided in the lid

16、 of the carrying case. An integral fan provides cooling. AVTM6514J Rev. A (03/2003) 4 AVTM6514J Rev. A (03/2003) 5 Section 2 Safety This equipment and the cable to which it is connected are sources of high-voltage electrical energy. All persons performing or assisting in tests must use all practical

17、 safety precautions to prevent contact with energized parts of the test equipment and related circuits. Persons actually engaged in the test must stand clear, by at least 3 ft (0.91 m), of all parts of the complete high-voltage circuit unless the system is de-energized and all parts of the test circ

18、uit are grounded. Persons not directly involved with the work must be kept away from test activities by suitable barriers, barricades or warnings. Be aware that impulses applied to the cable will be present at the remote end(s) and any other exposed part of the cable, usually out of sight of the ope

19、rator. To avoid inadvertent contact with hazardous live parts, always ensure that access to all exposed parts of the cable or connected equipment is restricted, by using suitable barriers or barricades. ? Safety is the responsibility of the user. ? Misuse of this high-voltage equipment can be extrem

20、ely dangerous. ? The purpose of the test equipment is limited to use as described in this manual. Do not use the equipment or its accessories with any device other than specifically described. ? Never connect the test equipment to energized equipment. ? Never use the test equipment if there is any p

21、ossibility that the test equipment or cable under test is in an explosive atmosphere. ? A qualified operator should be in attendance at all times while the test equipment is in operation. ? The safety ground jumpers and surge ground must be properly connected (refer to Section 5). ? Refer to IEEE 51

22、0-1983 IEEE Recommended Practices for Safety in High- Voltage and High-Power Testing, and follow the applicable safety recommendations. ? Observe the safety warnings marked on the equipment. Treat all terminals of high-voltage power equipment as a potential electric shock hazard. There is always the

23、 potential of voltages being induced at these terminals because of proximity to energized high-voltage lines or equipment. Always use a safety grounding stick to ground the high-voltage conductor. A safety ground jumper must then be installed between the high-voltage conductor and ground of the cabl

24、e under test. The ground connection must be the first made and the last removed. AVTM6514J Rev. A (03/2003) 6 Systems of this type should not be used to locate faults on direct-buried unshielded or secondary cable. Dangerously high differences in potential may be developed in the current return path

25、 to the system. Systems of this type should not be used to locate faults on any cable that is likely to be near enough to an energized cable to allow a burn through of the insulation of the energized cable. This situation may occur when the cables are located in a common trench, duct, or tray. On co

26、mpletion of a test, even after power has been removed from the system, energy can still be stored in the impulse capacitor and cable under test. To discharge the cable and capacitor, immediately after use, set the OUTPUT KILOVOLTS switch to ZERO START. This places a solid ground on the output cable,

27、 power supply, and impulse capacitor. F WARNING Never assume that the coaxial output cable or the cable under test is completely discharged, even after following the above procedures. Always use a safety grounding stick to ground any conductive part of the circuit and then apply safety ground jumper

28、s before touching any connections. This system operates from a single-phase power source. It has a three-wire power cord and a two-pole, three-terminal grounding type connector. The voltage to ground from either pole of the power source must not exceed the maximum rated operating voltage, 120 V ac f

29、or Catalog No. 651403 and 240 V ac for Catalog No. 651404. Before making connection to the power source, determine that the system is suitable for the voltage of the power source, and has a suitable two-pole, three-terminal grounding type connector. The power source must have a high rupture fuse or circuit breaker rated no higher than 15 A. The power input plug must be inserted only into a mating receptacle with a ground contact. Do not bypass the grounding connection. Any interruption of the grounding connection can create an electr