Biddle MHP1MHP2_User_Guide 电路图.pdf

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1、Withstand Testers MHP1 to the left provides the unlatched mode, to the right provides the latched mode. Gently pull to remove the link from the terminals, and re-position as required. 6. Interface and Interlock terminals (under cover plate) To gain access to the interface terminals, remove the IEC m

2、ains connector from the instrument. The screw holding the cover in position is then removed and the cover can be swung up out of the way, exposing the interface terminals. The terminals are not suitable for solid core wires. Multi-stranded conductors, 22-16 AWG (1mm2- 1,5 mm2) should be used. The us

3、e of wire ferrules is recommended to eliminate stray strands of wire; recommended insulation strip length is 8 mm. The terminal screws should be tightened securely. On completion, the cover plate should be swung back into position and secured by replacing and tightening the cover plate retaining scr

4、ew. Terminal connections and fuses The interface terminals are in three groups:- i)Relay Terminals The top three terminals are for applications that require an external test status indication. Test Failed and Test OK can be signalled. The maximum current that can be switched is 8 Amp at 250 Volts. 7

5、 When the Failed condition is active, the Common terminal is shorted to the Normally Open (N/O) terminal. When the Failedcondition is active the Common terminal and the Normally Closed (N/C) terminal are open circuited by the instrument. To gain access to the relay terminals, the IEC line connector

6、must be removed from the instrument. The screw holding the cover in position is then removed and the cover can be swung up out of the way, exposing the interface terminals. ii)HV On Terminals Some regulations call for various signalling lamps to indicate hazardous and potential Risk situations. The

7、terminals shown allow for the connection of a Line powered High Voltage On indicator or beacon. See Accessories for Warning beacon. A maximum current of 12Amp can be drawn from these terminals. HV On terminal connections 9 Normal Open Common Phase Neutral Alarm Sounder Common Phase Neutral Normal Cl

8、osed Indicator Lamp Cable gland Cable gland Start mode linkStart mode link HV On HV On Cable gland Start mode link Line voltage at up to Amp 1 /2 iii)HV Interlock Terminals The bottom four terminals enable the HV supply to be safety interlocked. The instrument is supplied without the interlock termi

9、nals connected. The HV interlock terminals must be connected before the instrument will generate High Voltage. The Users HV safety interlock system must conform to National and Local safety codes and be designed in such a way that any contact with live parts is prevented. This is normally achieved b

10、y a solid barrier that must be removed before access can be obtained to the hazardous area. The action of removing the barrier forces the interlock switches to the open position thus interrupting the supply voltage for the HV generation circuit. The interlock connections operate at Line (mains) volt

11、age. All wiring connected to these terminals must rated for Line (mains) use and capable of carrying a current of 3 amps. Interlock connection example 7. Cable entry glands When wiring the safety interlocks, the wires to the terminals must pass through the cable entry glands and then be connected to

12、 the appropriate terminals. Cables of 1 8” to 1 4” (3 mm to 6.5 mm) outer insulation diameter can be used. The glands must be sufficiently tightened, after wiring, so that flexing the external cord does not cause any movement of the wires inside the panel. On completion, the cover plate should be sw

13、ung back into position and secured by replacing and tightening the cover plate retaining screw. Features, Controls and Connections 10 P2 - R Guard Op Optional Ready to ? Test Indicator P1 - S P1 - R P2 - S Cable gland Cable gland ? Line voltage ? on terminals Start mode link Guard in Open Position I

14、nterlock switch (user supplied) Testing Precautions High voltage testing is potentially lethal. Care must be taken at all times to ensure that risks to safety are eliminated. The instruments must only be used by suitably trained and competent persons. The instrument User is responsible for their own

15、 safety and that of others who may come into contact with dangerous voltages as a result of a test. For safety, the instrument must be double grounded (earthed) to known good ground (earth) point. Firstly by the line powercord, and secondly from the rear protective ground (earth) terminal. During th

16、e installation process both ground (earth) connections should be checked to prove their integrity. See Before each testing sequence. Before operating the Line On / Off switch, ensure that the voltage control is set to minimum. If this is not done a voltage transient could occur at the output termina

17、l which could cause damage to the item under test or endanger the user. When making connections to the instrument, and to the device to be tested, ensure the instrument is in a safe condition, with all safety interlocks open. If any part of the instrument is damaged, it should not be used, but retur

18、ned to the manufacturer or an approved organization for repair. Charged Circuit Discharge For d.c. tests and when testing capacitors or equipment containing capacitors, extra care must be taken by the User to ensure that the item under test is fully discharged before handling. The instrument provide

19、s a discharge path which will discharge 0,5 F in 10 seconds. Even a small deflection of the voltmeter may represent a hazardous voltage. Warning:- Care must be taken to prevent capacitive circuits becoming disconnected during a test, leaving the circuit in a charged state. Automatic discharge must n

20、ot be relied upon as an alternative to normal safe working practice. Dielectric Absorption Some capacitive items exhibit an effect called Dielectric Absorption. The dielectric can absorb charge during the test. After the item is discharged, the absorbed charge is released back onto the capacitive pl

21、ates effectively raising the voltage of the item, possibly to dangerous levels. Safe working practice dictates that tested items should be firmly shorted out with a shorting link, after discharge, until required for use. The instrument is supplied with a 3 wire power cord. The instrument must be use

22、d with a grounded (earthed) supply, and all 3 wires must be connected. The colour code of the cord is :- U.S.A.U.K. / International Ground (Earth)GreenYellow/Green NeutralWhite Blue Line (Phase)Black Brown If using a fused plug, a 3 Amp fuse to BS1362 should be fitted. Operation 11 Before each testi

23、ng sequence:- 1. Decide upon the Start mode required, and connect the Start mode link in the appropriate position. 2. Check the condition of the HV probe and test lead (or LV probe) to ensure that they are in good order, clean, with no broken or damaged insulation. A daily Continuity test is recomme

24、nded. To check the HV probe and test lead (or LV probe):- i)Plug the HV probe in the a.c. HV receptacle. ii)Ensure that the Low Return lead (or LV probe) is firmly secured to the Low return terminal. iii)Set the voltage control to minimum. iv)Set the trip mode to TRIP and set the trip current limit

25、to 0.3 mA. v)Switch the instrument on. The switch illuminates. vi)Short the HV probe and the end of the Low Return lead (or LV probe) together. vii)Start the instrument and slowly increase the voltage. 3. The instrument should trip before the voltmeter pointer moves. If the pointer moves, the test l

26、eads are suspect, and must be fully, and properly inspected. 4. Ensure that the voltage control is set to minimum before operating the line power switch. If this is not done a voltage transient could occur at the output terminal which could cause damage to the item under test or endanger the user. 5

27、. Check that all interlocks are fully operational. Carrying out a test 1.Set the required:-i)Test mode (Breakdown - Trip / Breakdown - Trip) ii)Trip level (0.3 mA to 10 mA) 2. Connect the HV probe and the Low Return lead to appropriate points of the device under test. For safety it is advisable to c

28、onnect the HV to the least accessible part of the item under test. 3. Close all interlocks. 4.Switch the instrument on. The switch illuminates. 5. Push the Stop button, followed quickly by the Start button. (Depending on the selected Operation 12 High Voltage testing is hazardous. Safety Warnings an

29、d Testing Precautions must be read and understood. They must be observed during use. High Voltage testing is hazardous. Safety Warnings and Testing Precautions must be read and understood. They must be observed during use. The condition of the HV probe and test lead is critical to overall safety. A

30、faulty or damaged HV probe or test lead must not be used under any circumstances. mode the Start button is released, or held for the duration of the test). 6. Once the HV circuit is energised, adjust the voltage to the test level required. Note:- It is advisable to slowly increase the test voltage f

31、rom a low value, giving the insulation within the device under test, time to react to the stress. This will also reduce false tripping due to switching On at the required test level. This is especially true for d.c. tests. 7.If the test fails, the failed indication will light and the buzzer will sou

32、nd. Repeat the test to confirm the failure. 8. Press the Stop button to switch the High Voltage off and to reset the failure indication. 9. To stop the test after the correct time press, the Stop button (or release the Start button). On completion, open all safety interlocks. Switch the Withstand te

33、ster Off. Note:- When performing an a.c. test, capacitance of the test leads can cause a small leakage current. Typically, this is in the order of 20 A per metre, for each 1000 V of test voltage. This effect is normal, but may cause the instrument to trip at a lower level of leakage than expected. T

34、his effect is most noticeable at the lower trip ranges. It is therefore important to consider this effect before extending the test leads in any way. Switched Low Voltage probe LP2 In conjunction with the HV probe provided, the optional LV probe allows remote activation of the Withstand tester enabl

35、ing fast, safe probing of the item under test. 1.Refer to Carrying out a test. 2.Connect the probe DIN plug to the R/C socket, and firmly secure the hook terminal to the Low return terminal. Connect the HV probe to the appropriate HV receptacle. 3.Switch the Withstand tester on and set the Test mode

36、, Trip level, and Voltage as required. Check that all safety interlocks are closed. 4.Firmly hold both probes to the item under test. For safety it is advisable to hold the HV probe to the least accessible part of the item under test. 5.Squeeze the LV probe switch to start the test. 6.Release the LV

37、 probe switch to stop the test. 7.As required, move the probe around the item under test, operating the probe switch as appropriate. 8.If the test fails, the Fail indicator will light, and the buzzer will sound. 9.To reset the Withstand tester Fail indicator, disengage the probes, and briefly squeez

38、e the LV probe switch. Repeat the test to confirm a test Fail. On completion, open all safety interlocks. Switch the Withstand tester Off. 13 High Voltage testing is hazardous. Safety Warnings and Testing Precautions must be read and understood. They must be observed during use. 120 k Resistance Box

39、 This optional accessory is used to check that the instrument will operate and indicate correctly, when an item under test has significant insulation leakage current. 1.Refer to Carrying out a test. 2.Firmly connect the supplied lead from the Resistance Box to the instrument Low return terminal. Con

40、nect the HV probe to the appropriate HV receptacle. 3.Switch the Withstand tester on and set the Test mode, Trip level, and Voltage as required. Check that all safety interlocks are closed. 4.Firmly hold the instrument HV probe to the Resistance Box test point stud. The HV probe tip, and the resista

41、nce box must not be touched during the operation. 5.Start the instrument. 6.The instrument should instantly indicate Fail, and sound the buzzer. 7.Press the Stop push to reset the Withstand tester. Repeat the test to confirm a test Fail. On completion, open all safety interlocks. Switch the Withstan

42、d tester Off. Note:- If the instrument does not operate within 5 seconds, Stop the Test (to prevent excess heat damage to the Resistance Box). Operation 14 High Voltage testing is hazardous. Safety Warnings and Testing Precautions must be read and understood. They must be observed during use. MHP1MH

43、P2 Test Voltage:0 - 3 kV a.c.0 - 3 kV a.c. 0 - 4 kV d.c. d.c. ripple content:150 V d.c. pk - pk at 1 mA Display:Analogue movement - Sifam 29W Display Accuracy: 2.5% of full scale deflection Current Trip:Peak or d.c. 0.3 mA, 0.5 mA, 1.0 mA, 2.0 mA, 3.5 mA, 5.0 mA, 10.0 mA Current trip accuracy: 10% o

44、f indicated value - 0.3 mA and 0.5 mA ranges 5% of indicated value - All other ranges Typical Cap. leakage:25 A per 1000 V test voltage - Standard probe (5310-406) Safety:Meets the requirements of IEC 1010-1 (1995) EN61010-(1995) Fuses:2 x T2A HBC 114” x 14” (32 mm x 6,5 mm) Line power cord fused pl

45、ug (when applicable): 3 Amp fuse to BS 1362 EMC:Meets EN50081-1, EN50082-1 (1992). Meets EN61326-1 in the following categories:- IEC10004-2 Cat A; IEC10004-3 Cat A; IEC10004-4 Cat A; IEC10004-5 Cat C; IEC10004-11 Cat A. Temperature: Operating:32 F to 104 F (0 C to 40 C) Storage:4 F to 140 F (-20 C t

46、o 60 C) Humidity: Operation:80% RH at 104 F (40 C) Note:- After storage in high humidity, or moving from a cold to warm environment, allow the instrument to sit for at least 3 hours before use. Dimensions:11” x 1112” x 434” (257 mm x 280 mm x 110 mm) Weight:17. 6 lb (8 kg) Specification 15 Typical d

47、.c. Loading 115 V. instrument230V. instrument 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 repair by suitably trained and qualified p

48、ersonnel. 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 stresses. New Instruments are Guaranteed

49、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 MEGGERInstruments contact :- AVO INTERNATIONAL orAVO INTERNATIONAL or MEGGER SARL Archcliffe Road Valley Forge Corporate Center29 Alle de Villemomble Dover 2621 Van Buren Avenue93340, Le Raincy Kent, CT17 9EN.Norristown, PA 19403Paris EnglandU.S.A.France Tel: +44 (0) 1304 502243Tel: +1 (610) 676-8579Tel: +33 (1) 43.02.37.54 Fax: +44 (0) 1304 207342 Fa