Biddle MJ159_UG 电路图.pdf

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1、Major MEGGER Insulation Testers MJ159 (212159), MJ160 (212160), MJ359 (212359), MJ459 (212459), MJ559 (212559) User Guide MEGGER RadioFans.CN 收音机爱 好者资料库 Contents 2 Safety Warnings3 General Description4 Operation Testing precautions5 Preliminary checks5 Battery condition check (MJ459 and MJ559)5 Batt

2、ery replacement (MJ459)5 Battery Charging (MJ559)5 Performance checks6 Voltage measurement6 Resistance Measurement6 Insulation testing7 Using the Guard terminal7 Fuse Checking and Replacement8 Specifi cation9 Accessories12 Application Notes Preventive maintenance13 Insulation Testing Concepts14 Repa

3、ir and Warranty15 RadioFans.CN 收音机爱 好者资料库 Safety Warnings Safety Warnings and Testing Precautions must be read and understood before the instrument is used. They must be observed during use. The circuit under test must be switched off, de-energised and isolated before any test connections are made.

4、Test leads, probes and crocodile clips must be in good order, clean and with no broken or cracked insulation. Circuit connections must not be touched during a test. Circuits must be discharged before disconnecting the test leads. Replacement fuses must be of the correct type and rating. When making

5、a voltage measurement, the Test button must not be pressed. The instrument should not be used if any part of it is damaged. U.K. Safety Authorities recommend the use of fused test leads when measuring voltage on high energy systems. Refer to Testing Precautions for further explanations and precautio

6、ns. NOTE THE INSTRUMENTS MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS. 3 RadioFans.CN 收音机爱 好者资料库 General Description 4 Major Megger MJ159, MJ160, MJ359, MJ459, and MJ559testers are compact instruments designed to give rapid, accurate and direct measurement of continuity and insulation

7、 resistance of domestic and industrial wiring, cables, transformers, motors, generators electrical machinery and appliances. Being self-powered, the instruments are suitable for use during installation and commissioning work as well as for service and maintenance applications. Insulation measuring r

8、ange is 0,1 to 2000 M (MJ160 0,1 to 1000 M). Automatic discharge for capacitive circuits under test is provided. A guard terminal can be used to minimise the effects of surface leakage when carrying out insulation resistance tests. In addition each instrument has a 5000 Resistance range making them

9、ideal for testing electrical installations. Nominal test voltages are 100 V, 250 V, 500 V and 1000 volts selectable. (MJ160: 50 V, 100 V, 250 V and 500 volts). All instruments have a mains (line) voltage measuring range of 0 to 600 V. Although calibrated for a.c voltage, this feature will give decay

10、ing voltage indication following the testing of equipment possessing capacitance. The instruments use a moving coil meter with taut band suspension; white scales on a black scale plate and an orange dayglow needle indicates the resistance value being measured. MJ159 and MJ160 are powered by a low vo

11、ltage, hand cranked, brushless a.c generator which is connected, after rectifi cation, to a d.c. to d.c. converter. The generator is designed to be easy to turn even under full load. Dual powered units are mains (line) powered with either an internal hand cranked generator, or battery cells that are

12、 re- chargeable by the instruments internal charger. The MJ359 is dual mains (line) or hand cranked generator powered. The MJ559 is dual mains (line) or rechargeable battery powered. Power for the MJ459 is derived from six 1,5 V (IEC LR6) cells. The cells are connected to a d.c. to d.c. converter to

13、 provide the test voltages. MJ459 and MJ559 are fi tted with a button switch to enable the battery charge to be checked. The case is robust, yet light-weight, made from a strong polycarbonate plastic. Mounted on top of the case is a 5 position, rotary, range selection switch and a Test push button.

14、Three shrouded 4 mm terminal sockets marked -, G and + are provided on the side of the case for test lead connection. Test lead resistance is included in the instrument calibration. For this reason, only the test leads supplied or replacement ones should be used. After the test leads have been conne

15、cted to the instrument terminals, the carrying handle folds down neatly over them. Should the carrying handle accidentally become detached from the case it may easily be sprung back into position. Operation TESTING PRECAUTIONS 1.The instruments must only be used by suitably trained and competent per

16、sons. 2.The instruments can give an electric shock. Highly capacitive circuits (e.g. long lengths of cable) charged to several kV can create a potentially lethal charge. Circuit connections must not be touched when testing. 3.Care must be taken to prevent capacitive circuits becoming disconnected du

17、ring a test, leaving the circuit in a charged state. 4.The voltmeter and automatic discharge feature of the instruments should be regarded as additional safety features and not a substitute for normal safe working practice. 5Fuse replacements must be of the correct type and rating. See Specifi catio

18、n. 6.If any part of the instrument is damaged, it should not be used, but returned to the manufacturer or an approved organization for repair. 7.Should the plug on the power cord (MJ359 and MJ559) not be the type for your receptacles (socket outlets) do not use an adaptor. Use a suitable alternative

19、 power cord, or if necessary change the plug by cutting the cord and fi tting a suitable plug. The colour code of the cord is : U.S.A.U.K./ International Ground)GreenYellow/Green Neutral WhiteBlue LineBlackBrown If using a fused plug, a 13 Amp fuse to BS1362 should be fi tted. PRELIMINARY CHECKS Bat

20、tery Condition Check (MJ459 the meter is RMS calibrated and average responding Safety voltage indicator:Indicates the presence of d.c. voltages. Scaling is not the same as the a.c. meter. True d.c. voltage equals scale reading divided by 2,22 Accuracy:2,5% of full scale Power Supplies MJ159 and MJ16

21、0:Low voltage brushless a.c. generator. Cranking speed between 130 rpm and 170 rpm MJ359:Dual operation low voltage brushless a.c. generator or 120 V 50/60 Hz mains (line) supply MJ459:Six IEC LR6 cells (AA) Battery life:not less than 1300 insulation or Resistance range tests MJ559:Dual operation 12

22、0 V 50/60 Hz mains (line) supply and rechargeable battery Six Ni Cad cells (e.g. AA, NEDA 15 NC) Safety:The instruments meet the requirements for double insulation to IEC 1010-1(1995), EN 61010 (1995) to installation Category II, 300 V phase to earth (ground), 600 V installation Category I Flash Tes

23、t:6 kV a.c. r.m.s. 11 Fuses:500 mA (FF) 660 V Ceramic 50 kA HBC 11/4ins x 1/4ins (32 mm x 6 mm) 7A (F) 440 V Ceramic 10kA HBC 114ins x 14ins (32 mm x 6 mm) 100 mA (F) HBC 20 mm x 5 mm (for line protection only) MJ359 and MJ559 only:Power connection plug fuse - 100 mA 240 V HBC 2532ins x 14ins (20 mm

24、 x 6 mm) Mains power cord fused plug (when applicable) 3 A 250 V ceramic H.B.C. fuse to BS1362 114ins x 14ins (32 mm x 6 mm) E.M.C.The instruments meet EN 50081-1 and EN 50082-1 (1992) Operating Temp. Range:32 to 113F (0 to 45C) for battery operated models 14 to 122F (-10 to 50C) Humidity Range Oper

25、ating: 70% RH max. at 68F, (20C) 60% RH max. at 95F, (35C) 50% RH max. at 105F (40C) Storage:95% R.H. max. at 95F (35C) Dimensions Length:180 mm (7 ins) (210 mm 8,3 ins including generator handle) Width:125 mm (4,9 ins) Height:130 mm (5,1 ins) Weight:Approximately 1 kg (2,3lb) Cleaning:Wipe disconne

26、cted instrument with a clean cloth dampened with soapy water or Isopropyl Alcohol (IPA). Accessories 12 SUPPLIED WITH THE INSTRUMENT PART NUMBER User Guide6172-113 Test lead set (3 leads, 3 prods, 3 clips)6220-436 Power cord (Where applicable)25970-002 (U.S.17032) Test Record Card (5 supplied)6172-1

27、11 (U.S. 210949) AVAILABLE AS AN OPTIONAL EXTRA Carrying case 6420-043 (U.S.217740) Test Record Card (Pack of 20)6111-216 Black test lead with large alligator clip6220-295 Red test lead with large alligator clip6220-586 Green test lead with large alligator clip6220-587 Set of test leads with fused p

28、rods (FPK5) - 1000 V a.c. 500 mA fuse 6111-288 Test lead set, 3,6m 12 ft (1 pair)210972 Electrodes (for fl oor testing), 2,25 kg 5lb each (1 pair) 260565 PUBLICATIONS A Stitch In TimeAVTM21-P8B Application Notes Preventive Maintenance The proverb A stitch in time saves nine inspired the title of an

29、AVO INTERNATIONAL booklet on insulation testing, as it neatly sums up the benefits of preventative maintenance. The savings come in fi nancial terms from costly repairs, lost production, lost profi ts and in human terms, from lives saved in the event of dangerous electrical faults. Regular insulatio

30、n testing of electrical equipment can help to detect deteriorating insulation. The effects which cause insulation to deteriorate include mechanical damage, vibration, excessive heat or cold, dirt, oil, moisture and localized voltage stresses - all of which can arise on most industrial or utility equ

31、ipment. Insulation tests are sometimes used in isolation as absolute measures of the quality of the insulation. This is most appropriate when equipment is being installed and checked for compliance with a specifi ed Pass level. For operational equipment the key factors are trends in the insulation r

32、eadings. It is therefore important that records of insulation readings are kept, relating to each piece of equipment or Asset in your testing regime. AVO INTERNATIONAL supplies test record cards to assist with such record keeping. There are also a number of infl uences on the insulation readings - t

33、emperature, humidity and surface leakage for example and a range of test techniques have been developed to help with the interpretation of your insulation tests. AVO INTERNATIONAL Insulation Test Record Equipment.No. Rating. Location .Date installed . 0.1 1 10 100 1000 10000 100000 1000000 Date M Te

34、st Record Example 15 Application Notes Insulation Testing Concepts Insulation resistance can be considered by applying Ohms Law. The measured resistance is determined from the applied voltage divided by the resultant current, V R = I There are two further important factors to be considered. These ar

35、e: (i) the nature of the current through and/or over the insulation (ii) the length of time for which the test voltage is applied. These two factors are linked. The total current that fl ows is made up of three separate currents:- 1. Capacitance charging current. This current is initially high and d

36、rops as the insulation becomes charged up to the applied voltage. 2. Absorption current. This current is also initially high but drops at a much slower rate than the charging current. 3. Conduction or Leakage current. This is a small steady current that can be sub-divided into two:- (a) A current fl

37、 owing along conduction paths through the insulation material. (b) A current fl owing along conduction paths over the surface of the insulation material As the total current depends upon the time for which the voltage is applied, Ohms Law theoretically applies at infi nite time. The charging current

38、 falls relatively rapidly as the equipment under test becomes charged up. The actual length of time depends upon the size and capacitance of the item under test. Larger items with more capacitance will take longer e.g. long supply cables. The absorption current decreases relatively slowly compared w

39、ith the charging current. In essence it depends upon the nature of the insulation material. The conduction or Leakage current builds up quickly to a steady value and then remains constant for a particular applied voltage under stable conditions. It is this current that is affected by moisture, dirt

40、etc. and the degree to which it fl ows bears a direct relation to the quality of the insulation, and consequently to the value of the insulation resistance measured. An increase in the leakage current is a pointer to possible future problems. 1 0 0 1 0 1 0 . 1 1 1 0 C O R R E N T E Corrente de Absor

41、co Corrente Total Corrente de Carga de Capacitncia Corrente de Conduao ou Disperso 14 The instrument circuit contains static sensitive devices, and care must be taken in handling the printed circuit board. If the protection of an instrument has been impaired it should not be used, and be sent for re

42、pair by suitably trained and qualifi ed personnel. The protection is likely to be impaired if, for example, the instrument shows visible damage, fails to perform the intended measurements, has been subjected to prolonged storage under unfavourable conditions, or has been exposed to severe transport

43、stresses. New Instruments are Guaranteed for 1 Year from the Date of Purchase by the User. Note: Any unauthorized prior repair or adjustment will automatically invalidate the Warranty. Instrument Repair and Spare Parts For service requirements for MEGGER Instruments contact: AVO INTERNATIONALorAVO I

44、NTERNATIONAL Archcliffe Road Valley Forge Corporate Centre Dover 2621 Van Buren Avenue Kent, CT17 9EN.Norristown, PA 19403 England.U.S.A. Tel: +44 (0) 1304 502243Tel: +1 (610) 676-8579 Fax: +44 (0) 1304 207342 Fax: +1 (610) 676-8625 or an approved repair company. Approved Repair Companies A number o

45、f independent instrument repair companies have been approved for repair work on mostMEGGER instruments, using genuine MEGGER spare parts. Consult the Appointed Distributor / Agent regarding spare parts, repair facilities and advice on the best course of action to take. Returning an Instrument for Re

46、pair If returning an instrument to the manufacturer for repair, it should be sent freight pre -paid to the appropriate address. A copy of the Invoice and of the packing note should be sent simultaneously by airmail to expedite clearance through Customs. A repair estimate showing freight return and o

47、ther charges will be submitted to the sender, if required, before work on the instrument commences. Repair and Warranty 15 AVO INTERNATIONAL MeterCenter 2046 W. Peninsula Circle, Chandler, AZ 85240 Telephone +1 480-659-8351 Toll Free (800) 230-6008 Fax: +1 480-659-8361 Email: SalesMeterC Website htt

48、p:/www.MeterC This instrument is manufactured in the United Kingdom. The company reserves the right to change the specifi cation or design without prior notice. MEGGER is a registered Trade Mark of AVO INTERNATIONAL LIMITED. Copyright , AVO INTERNATIONAL LIMITED. Part No. 6172-113 - Edition 7 - Printed in England - 10GG LEET