Biddle BM15_MJ_15_UG 电路图.pdf

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1、MEGGERBM15/MJ15 Insulation Testers User Guide MeterCenter (800) 230-6008 MEGGER RadioFans.CN 收音机爱 好者资料库 2 Contents Guide de lutilisateur - p.14 Gebrauchsanleitung - s.26 Gua del usuario - p.38 Safety Warnings3 General Description4 Features and Controls5 Working with Capacitive Loads6 Operation Preli

2、minary Checks7 Battery Replacement 7 Voltage Measurement8 Insulation Testing8 Choice of Test Leads8 Using the Guard terminal9 Specifi cation10 Accessories12 Repair and Warranty13 Before using the instrument, follow the separate instructions provided to fi t either the locking or non-locking test but

3、ton. If the locking button is fi tted, extra care must be taken. See page 6. Symbols used on the instruments Risk of electric shock. Caution, refer to accompanying documents Equipment protected throughout by Double Insulation (Class II) Equipment complies with current EU Directives RadioFans.CN 收音机爱

4、 好者资料库 3 Safety Warnings Safety Warnings and Working with Capacitive Loads must be read and understood before the instrument is used. Safety precautions must be observed during use. The circuit under test must be switched off, de-energised and isolated before any test connections are made. Circuit c

5、onnections must not be touched during a test. On completion of a test, decaying voltage across the terminals is indicated on the display. Capacitive load circuits must be discharged to below 60 V before disconnecting the test leads. Capacitive load circuits should be shorted with a shorting link aft

6、er discharge. Remove the test leads from the instrument before opening the battery compartment. Test leads and crocodile clips must be in good order, clean and with no broken or cracked insulation. The instrument should not be used if any part of it is damaged. U.K. Safety Authorities recommend the

7、use of fused test leads when measuring voltage on high energy systems. See Choice of Test Leads. NOTE THE INSTRUMENTS MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS. Note Users of this equipment and or their employers are reminded that Health and Safety Legislation requires them to carr

8、y out valid risk assessments of all electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as from inadvertent short circuits. Where the assessments show that the risk is signifi cant then the use of fused test leads constructed in accordance with

9、 the HSE guidance note GS38 Electrical Test Equipment for use by Electriciansshould be used. See Choice of Test Leads. RadioFans.CN 收音机爱 好者资料库 General Description 4 B M 1 5, and M J 1 5testers are completely self contained instruments designed for high voltage insulation resistance testing in the ma

10、intenance and servicing of rotating plant machinery, transformers, switchgear and industrial installations. Tests can be performed at 500 V, 1000V, 2500 V or 5000 V. Insulation measuring range is 100 k to 20 G and Infi nity. Automatic discharge for capacitive circuits under test is provided and deca

11、ying voltage displayed. A guard terminal can be used to minimise the effects of surface leakage when carrying out insulation resistance tests. Tests are initiated by pressing the BM15 Test button (or by turning the MJ15 generator handle). Releasing the Test button (or ceasing handle rotation) causes

12、 the instrument to default to ac/dc voltmeter mode, with a discharge resistor internally connected across the terminals.This feature will give decaying voltage indication following the testing of equipment possessing capacitance. The moving coil meter operates a black pointer to display the readings

13、 on a single logarithmic black scale on a white scale-plate for clarity of reading. The movement is resiliently mounted for fi eld use. A slide - in Pass Band overlay can be inserted over the display. Appropriate Pass/Fail bands can be marked on these windows with a permanent marker for Go / No Go t

14、esting. BM15 is powered by eight 1,5 V (IEC LR6) cells. Normal power for the MJ15 is by low voltage, hand cranked, brushless a.c generator. Fitting the battery container supplied, with eight 1,5 V IEC LR6 cells gives the instrument a dual (independent) supply capability. Both instruments are fi tted

15、 with a battery check range, operated by pressing the Test push button. Cranking the handle too slowly (180 rev/min. 1) If battery cells are fi tted, switch to Battery Check range and press the Test push button. Confi rm that the pointer settles within the battery symbol portion of the scale. 2) Wit

16、h the test leads disconnected, set the rotary selector switch to the appropriate insulation range, press and hold down the Test button, (or turn the generator handle). The meter pointer should move up the scale briefl y and then return to the (infi nity) position on the scale. This establishes that

17、there is no leakage through the instrument itself. 3) Check that the test leads and crocodile clips are in good order, clean and with no broken or cracked insulation. Connect two of the test leads to the + and - terminals and ensure that their clips are not touching anything. 4) Press the Test butto

18、n again (or turn the generator handle) and observe the meter pointer. The pointer should rest over the position on the scale. If it does not, the test leads may be faulty and should be inspected more closely for damage. Replace them if necessary. 5) Connect the test lead clips together, press the Te

19、st button (or turn the generator handle) and observe the meter pointer. The meter should read 0 . If it indicates infi nity or a high resistance value the leads may be open circuit and should be inspected further. Replace them if necessary. (Shorting the leads together and obtaining a 0 reading also

20、 indicates that the instrument is working). Battery Replacement The cells are housed in a battery compartment in the base of the instrument. To change the cells, use a screwdriver to remove the battery cover securing screws and lift off the battery compartment cover. Observing the correct polarity a

21、s marked on the battery housing, install 8 replacement IEC LR6 (AA) cells. Replace and secure the battery compartment cover on completion. Warning The battery contacts are not isolated from the test leads. Remove the test leads from the instrument before opening the battery compartment. Operation 8

22、Voltage measurement When switched to the V position, the instrument measures up to 600 V a.c. to the specifi ed accuracy of the instrument. DC voltage is also indicated on the display, but not to the specifi ed accuracy. When not testing (i.e. in standby mode) and connected to a live circuit, the in

23、struments default to voltmeter (0 to 600 Volts a.c. or d.c.) irrespective of the rotary switch position. Any voltage present will immediately be shown. Thus indication is given that the item has not been completely de-energized. The instrument also monitors circuit discharge when the Test button is

24、released following an insulation test on a capacitive item, e.g. a long cable. Insulation Testing After connecting the test leads to the instrument and carrying out the Preliminary Performance Checks: 1) Set the selector switch to the required test voltage. Connect the test leads to the isolated cir

25、cuit to be tested, as follows:- (a) For insulation tests to earth (ground):- Connect either test lead to earth (ground) or the frame of the equipment,and the other lead to that part of the circuit to be tested. b) For insulation tests between wires:- Connect a lead to the core of each of the wires.

26、2) Press the Test button (or turn the generator handle). 3) The meter pointer will indicate the value of insulation resistance on the scale. If a capacitive circuit is tested, the pointer will initially defl ect towards 0 and then gradually rise to its final steady value as the capacitance is charge

27、d up to the output voltage of the tester. If several successive readings of (infi nity) are obtained, connect the two farthest ends of the test leads together and carry out a check on the leads. A 0reading should result which double checks that the leads are not disconnected or broken and therefore,

28、 the insulation resistance readings are correct. Capacitive circuits automatically discharge through the tester when the Test button is released. Decaying discharge voltage will be indicated on the voltage scale. Wait a few moments for the voltage to decay to below 60 V before disconnecting the test

29、 leads. Choice of Test Leads BM15/ MJ15 are supplied with three unfused leads terminated in crocodile clips. These are the best leads to use for insulation tests on non-live circuits. The crocodile clips ensure that any capacitive load remains connected until it is automatically discharged at the en

30、d of a test. GS 38 (UK Safety Authority Guidance Note) advises the use of fused test prods if the instrument is to be used for making voltage measurements on live, high energy circuits. These leads are available as an optional extra. See Accessories. Fused prods must not be used for insulation testi

31、ng. If the fuse should rupture, or the prods lose contact during a test, the system under test would remain charged without any apparent evidence of danger ! Do not forget to release a locked Test button, and discharge any capacitance before touching the item under test, or disconnecting the test le

32、ads. 9 Using the Guard terminal (G) For basic insulation tests and where there is little possibility of surface leakage affecting the measurement, it is unnecessary to use the guard terminal (if the insulator is clean and there are unlikely to be any adverse current paths). However in cable testing,

33、 there may be surface leakage paths across the insulation between the bare cable and the external sheathing due to the presence of moisture or dirt. Where it is required to remove the effect of this leakage, particularly at high testing voltages, a bare wire may be bound tightly around the insulatio

34、n and connected via the third test lead to the guard terminal G. The guard terminal is at the same potential as the negative terminal. Since the leakage resistance is effectively in parallel with the resistance to be measured, the use of the guard causes the current fl owing through surface leakage

35、to be diverted from the measuring circuit. The instrument therefore reads the leakage of the insulator, ignoring leakage across its surface. Operation Block Diagram to -ve terminal Leakage Path Tightly bound bare wire to +ve terminal to G terminal 10 Insulation Range:100 k to 20 G (also 0 and ) Test

36、 Voltages (d.c.):500 V, 1000 V, 2500 V & 5000 V Test Voltage Accuracy:5% of nominal test voltages on 20 M load Test Voltage Stability:1% (180 r.p.m. to 240 r.p.m. MJ15) Insulation Accuracy (at 0 - 30C):2,5% of scale Short Circuit Current: 1,5 mA 0,5 mA Maximum capacitance of load:5 F Interference Re

37、jection:1 mA rms at 50 to 60 Hz Discharge Resistor:500 k Voltage Range: 0 to 600 V a.c. indication of d.c. Accuracy: 2,5% f.s.d.(with rotary switch in the V position) d.c. unspecifi ed General Overload rating:720 V a.c. or d.c. Scale Length:72 mm (96) Power Supply: BM158 x LR6 (AAalkaline or recharg

38、eable) cells MJ15Low voltage brushless Generator or 8 x LR6 (AA alkaline) cell battery Battery life: Typically 2000 fi ve second tests at 5 kV on 100 M load Battery Indicator:Loaded battery test Specifi cation 11 Safety:Meets the safety requirements for double insulation to IEC 1010-1 (1995) EN61010

39、 (1995) to installation Category III*, 300 Volts phase to earth (ground) or 600 Volts Category I* Non replaceable Fuse:1 Amp, 250 V, HBC type (F) (20 mm x 5 mm) to IEC 127/1 This fuse protects the instrument against any faults occurring when using rechargable batteries. E.M.C:Meets EN 50081-1 and EN

40、 50082-1 (1992) with a maximum error of 5% f.s.d. in areas of high R . F. Temperature Range: Operating: 0C to 30C (32F to 86F) at full specifi cation Operating:-20Cto 50C (-4F to 122F) to temperature coefficient 0,1% / C Storage:-25C to 65C (-13F to 149F) Humidity:90% RH maximum at 40C (104F) Dimens

41、ions:220 mm x 160 mm x 115 mm (8,9 in x 6,3 in x 4,5 in) Weight:BM15Approx 1.2 kg MJ15Approx 1,6 kg, or 1,8 kg with battery holder and cells. Cleaning:Wipe the disconnected instrument with a clean cloth dampened with soapy water or Isopropyl Alcohol (IPA) *Relates to transient overvoltage likely to

42、be found in fi xed installation wiring. *Relates to transient overvoltage likely to be found in special equipment or parts of equipment, telecommunication, electronic etc. Note: MJ15 will operate as normal by generator at full temperature range BM15 will require new healthy battery cells to operate

43、as normal at -20C Accessories 12 SUPPLIED WITH THE INSTRUMENT PART NUMBER User Guide6172-209 Battery of 8 x 1,5 V LR6 (AAAlkaline) cells Test lead set (3 x 3 m test leads) 6121-403 Test Record Card (5 supplied)6172-111(U.S. 210949) Carrying case with lead storage6420-117 Slide in Pass Band overlay (

44、5 supplied)6121-401 AVAILABLE AS AN OPTIONAL EXTRA 5 kV Fused Prod Set6320-240 5 kV Calibration Box - CB1016311-077 Test Record Card (Pack of 20)6111-216 PUBLICATIONS A Stitch In TimeAVTM21-P8B Lowdown on HV d.c. TestingAVTM22P-1 13 Repair and Warranty The instrument circuit contains static sensitiv

45、e 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 repair by suitably trained and qualifi ed personnel. The protection is likely to be impaired if, for example, the instrument shows visi

46、ble damage, fails to perform the intended measurements, has been subjected to prolonged storage under unfavourable conditions, or has been exposed to severe transport stresses. New Instruments are Guaranteed for 1 Year from the Date of Purchase by the User. Note: Any unauthorized prior repair or adj

47、ustment will automatically invalidate the Warranty. Instrument Repair and Spare Parts For service requirements for MEGGER Instruments contact: AVO INTERNATIONALorAVO INTERNATIONAL Archcliffe Road Valley Forge Corporate Center Dover 2621 Van Buren Avenue Kent, CT17 9EN.Norristown, PA 19403 England.U.

48、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 of independent instrument repair companies have been approved for repair work on mostM E G G E R instruments, using genuine MEGGER spa

49、re 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 Repair 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 other charges will be submitted to the sender, if required, before work on the instr