Biddle 656601_UG 电路图.pdf

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1、AVTM656600- 01J Rev A August 2004 Instruction Manual for Cable Route Tracer Catalog No. 656601 Read the entire manual before operating. Antes de operar este producto lea este manual enteramente. M 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

2、 RadioFans.CN 收音机爱 好者资料库 Cable Route Tracer Manual Catalog No. 656601 RadioFans.CN 收音机爱 好者资料库 Copyright 1993 - 2003 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 ar

3、e used for purposes other than those specified herein, confirmation of their validity and suitability must be obtained from Megger. i AVTM656600-01J Rev A August 2004 Table of Contents 1 INTRODUCTION. 1 Receiving Instructions. 1 General Information. 1 2 SAFETY PRECAUTIONS. 3 3 SPECIFICATIONS. 5 4 DE

4、SCRIPTION. 7 General. 7 Function of the Controls:. 9 Principles of Operation:. 10 5 PRELIMINARY PROCEDURES. 13 6 OPERATION. 15 Peaking or Maximizing Technique. 15 Nulling or Minimizing Technique:. 18 Depth Measurement:. 20 Locating Transformers, Splices, and Faults. 23 Underground Transformers . 23

5、T-Splices and Y-Splices. 23 Grounded Faults. 23 Operating Suggestions and Cautions. 24 7 MAINTENANCE. 27 8 TROUBLESHOOTING. 29 9 WARRANTY AND REPAIRS:. 31 WARRANTY. 31 REPAIRS. 31 ii AVTM656600-01J Rev A August 2004 List of Figures Figure 1: Line Drawing of the Cable Route Tracer Cat. No. 656600. 7

6、Figure 2: Line Drawing of the Control Panel. 8 Figure 3: The Peaking or Maximizing Position. 15 Figure 4: Peaking or Maximizing Technique viewed from above. 16 Figure 5: Peaking or Maximizing Technique viewed from the side. 17 Figure 6: Nulling or Minimizing Position. 18 Figure 7: Nulling or Minimiz

7、ing Technique viewed from above. 19 Figure 8: Nulling or Minimizing Technique viewed from the side. 19 Figure 9: Depth Measurement Positions of the Cable Route Tracer. 21 Figure 10: Nulling or Minimizing Technique for Depth Measurement, one side. 21 Figure 11: Nulling or Minimizing Technique for Dep

8、th Measurement, opposite side. 22 Figure 12: Depth Measurement by Surface Distance. 22 Figure 13: Battery Replacement in the Pistol-Grip Handle. 27 1 AVTM656600-01J Rev A August 2004 1 INTRODUCTION Receiving Instructions Check the equipment received against the packing list to ensure that all materi

9、als are present. Notify Megger of any shortage. Telephone (610) 676-8500. Examine the instrument for damage received in transit. If any damage is discovered, file a claim with the carrier at once and notify Megger giving a detailed description of the damage. This instrument has been thoroughly teste

10、d and inspected to meet rigid specifications before being shipped. It is ready for use after it is unpacked and the headphones are assembled. The complete instrument consists of the following items: ? Cable Route Tracer with battery. ? The headphones consisting of two earpieces with connection cord

11、and headholder. General Information The Cable Route Tracer is an electronic instrument designed for locating tracing, and measuring the depth to ac energized underground power cables from the surface. The instrument can also be used to locate underground transformers, T- splices, Y-splices, and grou

12、nd faults on unshielded cable. It is supplied as: Catalog No. 656601 Cable Route Tracer with switchable 60 Hz filter. The unit senses the magnitude and direction of the effective electromagnetic field generated by conductors carrying dc impulses or ac loads up to 1000 Hz. Therefore, these instrument

13、s operate on loaded 50 Hz and 60 Hz single-phase power cables. Three-phase ac power cables, dc power cables, cables surrounded by other 50 Hz or 60 Hz energized cables, and faulted cables can be traced by applying a distinctive audio frequency tone of 1000 Hz or less from a tone generator. M 2 AVTM6

14、56600-01J Rev A August 2004 M 3 AVTM656600-01J Rev A August 2004 2 SAFETY PRECAUTIONS SAFETY IS THE RESPONSIBILITY OF THE USER LA SEGURIDAD ES EL CARGO DEL OPERATOR Since the Cable Route Tracer is used to trace cables which are energized with voltages that are hazardous and potentially lethal, all p

15、ersons making or assisting in tests must use all practical safety precautions to prevent contact with energized conductors, terminals, or other equipment. The Cable Route Tracer and recommended operating procedures have been designed with careful attention to safety. Megger has made formal safety re

16、views of the initial design and any subsequent changes. This procedure is followed for all new Megger products and covers areas in addition to those included in applicable ANSI standards. Regardless of these efforts, it is not possible to eliminate all hazards from electrical test equipment or to fo

17、resee every possible hazard which may occur. It is therefore essential that the user, in addition to following the safety rules in this manual, also carefully consider all safety aspects of the test before proceeding. Safety is the responsibility of the user. M 4 AVTM656600-01J Rev A August 2004 M 5

18、 AVTM656600-01J Rev A August 2004 3 SPECIFICATIONS Catalog No. 656601, Cable Route Tracer FUNCTION: This instrument is used to trace the route of underground cable or pipe when energized from an appropriate source, and to measure the depth below the tracing surface. It is also useful for locating un

19、derground transformers, T-splices, Y-splices, and grounded faults on unshielded cable. TYPE: Electromagnetic detector of ac voltage or dc impulses, with either peaking or null indications according to the orientation of a tracing coil. INPUT SIGNALS: a. Load-carrying 50 Hz or 60 Hz power line curren

20、t at any voltage. b. Other impressed ac voltage up to 1000 Hz. c. Impulses generated from a capacitance discharge cable fault locator. OUTPUT: Audible and/or visual indication of relative input signal level. SENSITIVITY: Readily detects 1 ampere ac at a depth of 6 feet under the surface in the absen

21、ce of adjacent metallic conductors. GAIN: Four overlapping switched sensitivity positions and a continuous 10-turn control provide an overall adjustment range of about 1000:1 at the meter output. ACCURACY OF LOCATIONS 3 inches at depth of 6ft. in absence of adjacent metallic conductors. (Vertical an

22、d horizontal.) M 6 AVTM656600-01J Rev A August 2004 INPUT SELECTOR: Switchable filter to reject interfering 50 Hz/60 Hz power line frequencies from adjacent load-carrying circuits when tracing from impressed ac voltage or capacitance impulses. STYLE: Portable, battery operated, with pistol grip and

23、battery test means. CONSTRUCTION: All transistorized electronic circuitry, enclosed in cast aluminum housing with swivel mounted tracing coil for peaking, nulling and depth measurement positions. BATTERY: 9-volt transistor radio NEDA 1604, Eveready 216, Burgess 2U6, RCA VS323. Battery life 150 hours

24、 or more in normal use. SIZE: 26 (66 cm.) overall, excluding headphones.; NET WEIGHT: 2 lbs. (1.1 kg.) SHIPPING WEIGHT: 8 1/3 lbs. (3.8 kg.) 7 AVTM656600-01J Rev A August 2004 4 DESCRIPTION General Structurally, the Cable Route Tracer consists of a control box fastened to a pistol-grip handle, and c

25、onnected through an extension arm to a swivel-mounted detection rod as shown in Figure 1. By turning the swivel, the detection rod can be set into detecting positions either parallel to the telescoping arm, perpendicular to it, or inclined at 45 degrees to it, (see Figures 3, 6, and 9). The control

26、box contains-and shields the electronic circuitry; on its face are mounted a gain control, a selector switch, a phone jack, and a meter as shown in Figure 2. The pistol-grip handle not only serves as a means of grasping the instrument but also houses its 9 volt battery in an easily removable clip, s

27、ee Figure 13. A set of high-impedance headphones completes the instrument. Figure 1: Line Drawing of the Cable Route Tracer Cat. No. 656601 M 8 AVTM656600-01J Rev A August 2004 Figure 2: Line Drawing of the Control Panel. Electrically, the detection rod is inductively influenced by the electromagnet

28、ic field associated with the current which is flowing through a cable. The signal thus received by the detection rod is amplified by the circuitry in the control box. With the gain control and the selector switch, the operator can vary the amount of amplification over a wide range, can adjust the de

29、gree of meter sensitivity, and can also test the state of the battery at any time. The amplified signal is heard at the headphones and is indicated visually by the meter. DESCRIPTION 9 AVTM656600-01J Rev A August 2004 Function of the Controls: Gain Control: The gain control shown in Figure 2 on page

30、 8 is a multi-turn potentiometer which provides a smooth and continuously variable adjustment of the amplifier gain. Selector Switch: The selector switch at the right of the panel as shown in Figure 2 has six positions 1. In the Off position, the battery is disconnected and the entire circuit is tur

31、ned off. 2. In the Batt Test position, the meter needle will indicate the condition of the battery; if the meter needle deflects into the green area at the right of the scale, the battery is good. If the meter needle falls to the left of the green area, the battery should be replaced. 3. The other f

32、our positions of the selector switch adjust the sensitivity of the meter response. The second position provides the lowest level of meter sensitivity, the fifth position provides the highest level of meter sensitivity, and the third and fourth positions provide intermediate levels. Because experienc

33、e proves that the lower levels of meter sensitivity are more useful for operating in the maximizing technique (explained below) while the higher levels of meter sensitivity are more useful for operation in the minimizing technique, the second and third positions of this switch have been labeled peak

34、 and the fourth and fifth positions have been labeled null. M 10 AVTM656600-01J Rev A August 2004 Principles of Operation: In searching for buried cables, the Cable Route Tracer is always carried and operated vertically: the operator grasps the instrument by the pistol-grip handle and holds it so th

35、at the detection rod is close to the earth. The signal sensed by the detection rod is amplified by the circuitry in the control box. By adjusting the gain control, the operator can regulate the amplification of the signal. He should always adjust the gain to produce a response level at meter and hea

36、dphones that is strong enough to be observed but not so strong as to saturate the circuit thereby rendering imperceptible the variations that may occur in the sensed signal. What the detection rod senses is the electromagnetic field propagated from the energized cable. The strength of the signal sen

37、sed at the detection rod, therefore, depends primarily on three factors: 1. on the amount of current flowing through the cable, 2. on the distance between the detection rod and the cable, and 3. on the position in which the detection rod is oriented with respect to the cable. a. The greater the current through the cable, the stronger will be the signal sensed by the detection rod. However, if the amount