Biddle MPP1000_UG 电路图.pdf

AVTMMPP Rev A May 2006 MPP1000 Pin Point Locator User Manual M Valley Forge Corporate Center 2621 Van Buren Avenue Norristown, PA 19403-2329 U.S.A. 610-676-8500 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 MPP1000 Pin Point Locator User Manual RadioFans.CN 收音机爱 好者资料库 Copyright 2006 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 of their validity and suitability must be obtained from Megger. Refer to the warranty information below. Specifications are subject to change without notice. WARRANTY Products supplied by Megger are warranted against defects in material and workmanship for a period of one year following shipment. Our liability is specifically limited to replacing or repairing, at our option, defective equipment. Equipment returned to the factory for repair must be shipped prepaid and insured. Contact your MEGGER representative for instructions and a return authorization (RA) number. Please indicate all pertinent information, including problem symptoms. Also specify the serial number and the catalog number of the unit. This warranty does not include batteries, lamps or other expendable items, where the original manufacturers warranty shall apply. We make no other warranty. The warranty is void in the event of abuse (failure to follow recommended operating procedures) or failure by the customer to perform specific maintenance as indicated in this manual. M Valley Forge Corporate Center 2621 Van Buren Ave Norristown, PA 19403-2329 610-676-8500 (Telephone) 610-676-8610 (Fax) AVTMMPP Rev A May 2006 i Table of Contents 1. 1 Introduction. 1 2. 3 Receiving Information. 3 3. 5 Overview. 5 Applications. 6 4. 9 Technical Specifications. 9 5. 11 Safety. 11 Warnings and Safety Precautions. 11 Safety Precautions. 11 6. 13 MPP1000 Operation. 13 Battery Installation. 13 Connectors and Accessories. 14 Input / Output Connectors. 15 MPP1000 Accessories Include:. 17 Interconnect. 18 Assembling the Geophone. 18 Interconnecting the unit. 19 Keypad and Display Functions. 20 Display. 20 Keypad. 21 Special Function. 21 Locating the Fault. 22 Magnetic Only Mode. 22 Probe Mode. 23 Dual Probe Mode. 24 Special Functions. 25 7. 27 Spare Parts. 27 8. 29 Troubleshooting. 29 AVTMMPP Rev A May 2006 ii M AVTMMPP Rev A May 2006 1 1 Introduction Thank you for purchasing the MPP1000 KIT from Megger. This unit will allow you to pin-point the location of flashing faults on underground primary cables. When used with geophones, the MPP1000 amplifies the acoustic emission produced by a surge generator (thumper) allowing you to hear the actual flash over, as well as show the time delay between the magnetic pulse (thumpers pulse) and the acoustic event. This time delay can be displayed in terms of time (milliseconds) or as a relative distance (feet or meters). Direction to the fault can also be determined and displayed by using two geophones. The dual geophone operation will also provide indication when the operator is directly over the fault. This manual will list the specifications as well as the instructions on how to use the Megger MPP1000 Pin Point Locator. If you find any discrepancies in the MPP1000 or have any comments please send them to Megger via fax, e-mail or phone. Megger Valley Forge Corporate Center 2621 Van Buren Avenue Norristown, PA, 19403 Attn: Customer Service Fax: (214) 337 3038 e-mail: Customer service 1-800-723-2861 ext. 3519 For more information please visit our web site at: M AVTMMPP Rev A May 2006 2 M AVTMMPP Rev A May 2006 3 2 Receiving Information Contents of MPP1000 Kit: Ref. No. Qty Part No. Description 1 1 MPP1000 MPP1000 Unit 2 1 6220-780 Carrying Strap 3 0, 1-2 36161 Geophones (1 or 2 units pending if single or dual were ordered) 4 0, 1-2 36063 Geophone Cables (1 or 2 units pending if single or dual were ordered) 5 0, 2-4 36172 Geophone Rods (2 or 4 units pending if single or dual were ordered) 6 0, 1-2 33153-2 Geophone Knob (1 or 2 units pending if single or dual were ordered) 7 0, 1-2 36063 Geophone Spikes (1 or 2 units pending if single or dual were ordered) 8 0, 1 36162 Headphones 9 8 23415 AA Batteries 10 1 AVTMMPP Manual M AVTMMPP Rev A May 2006 4 When your Megger MPP1000 Kit arrives, check the equipment received against the packaging list to ensure that all materials are present. Notify Megger of any shortages. Examine the contents for damage received during 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. AVTMMPP Rev A May 2006 5 3 Overview Specifically designed for service, industrial and power utility companies the Megger MPP1000 pinpoints faults in shielded and direct buried primary cables via a single or dual probe. The unit can successfully detect both the electromagnetic and acoustic pulses emitted from an arcing fault when it is surged. It can also be used with any Megger PFL Power Cable Fault Locating system/surge generator or other supplier. The MPP1000 without any acoustic geophone provides ? Detection of the presence of the electromagnetic pulse ? Measures the amplitude of that pulse for a rough location. The single probe version provides: ? Detection of the acoustic thump ? Measurement of time delay between acoustic and electromagnetic signals ? Relative distance calculation M AVTMMPP Rev A May 2006 6 The dual probe version provides: ? Detection of the acoustic thump ? Measurement of time delay between acoustic and electromagnetic signals ? Direction and approximate distance to the fault The instruments receiver is contained in a lightweight, compact housing that can easily be carried by a “hands free” adjustable strap around the neck. A convenient hook on the knurled poles also allows for safe cable holding. The detectors durable weatherproof enclosure allows for operation in all weather conditions. A pushbutton controls the volume of the sound in the headphones and can be adjusted for operator comfort. A single mute button is provided to turn off the sound from the detectors. Applications The MPP1000 pinpoints faults while the cable is being surged by a surge generator, or “thumper.” An arc occurs when the high energy surge delivered from the surge generator breaks the cable fault down and a loud acoustic emission is created. Since buried power cables are typically beneath 3 ft (0.9 m) or more of earth or pavement, this acoustic emission can go undetected without the aid of an acoustic amplification device. In many situations, simple acoustic amplification is not enough. Because acoustic emission from an arcing fault occurs at a single point along the cable path, information such as distance and direction to the fault becomes critical for fast, efficient pinpointing. Without this information, the acoustic emission can mislead when pinpointing the fault. If the cable fault is in a duct or conduit, the loudest acoustic emission will be detected either at the conduit end or the conduits actual breaking location. When pinpointing over paving, the loudest sound may be at a crack or seam. Because tree roots tend to carry the sound in all directions, the MPP1000 becomes especially useful. Fast, accurate pinpointing also means less use of the surge generator and thus less stress on service aged cables. The receivers display shows the operator the acoustic signal strength and the time delay between the electromagnetic surge and acoustic event. As the detector is placed closer to the fault, the acoustic signal strength increases while the time difference between surge and acoustic emission decreases. When directly over the fault, the time difference is at a minimum and the acoustic level is at a maximum. The same procedure can be used when placing the detector at a right angle to the cable path. Faults can be located more quickly by using a second detector. When using two detectors, the receivers display will show a direction Glossary AVTMMPP Rev A May 2006 7 arrow; that points to the detector closest to the fault. When the unit is directly over the fault, will appear. The receivers display also provides level of the electromagnetic surge, a measurement of the volume of the acoustic emission, and the time difference between the two events. M AVTMMPP Rev A May 2006 8 M AVTMMPP Rev A May 2006 9 4 Technical Specifications Operating Modes: Electromagnetic Pulse Pickup Single Acoustic Pickup Dual Acoustic Pickups Range: 0 99.9 mS, 0.1 mS resolution Inputs: Two for left and right pickups Output: Stereo Headphones Electromagnetic Gain: Automatic when button depressed to mid scale of bar graph Acoustic Pickup: Geophone, 660 Ohm, 40 Hz, 1.22V/in/sec +/- 10% Acoustic Pass Bands: 125 1000 Hz / 500 1000 Hz Display: LCD with switch able backlight Battery Life: = 65 hours with alkaline batteries, continuous use = 85 hours with lithium batteries, continuous use 200 hours, intermittent, less with backlight enabled Isolation: Electrical isolation between handle and pickup Power: 8, AA alkaline cells Enclosure: IP54, Weather Resistant Ambient Noise Cancellation: Built into headphones provided. Operating Temperature: 14 122 F Storage Temperature: -40 158 F Humidity: up to 95%, non-condensing Meets CE requirements: EN50081-1, EN50081-2 and EN50082-1. Meets IEC Requirements IEC61010 M AVTMMPP Rev A May 2006 10 M AVTMMPP Rev A May 2006 11 5 Safety Warnings and Safety Precautions WARNING! F Death, serious injury, or fire hazard could result from improper use/installation of this instrument. Read and understand this manual before installing this instrument. Installation of this instrument MUST be performed in compliance with the National Electric Code and any additional safety requirements applicable to your installation. Installation, operation and maintenance of this instrument MUST be performed by qualified personnel only. The National Electrical Code defines a qualified person as one familiar with the construction and operation of the equipment and the hazards involved. Safety Precautions The foll