Biddle MHP10_UG 电路图.pdf

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1、Withstand Tester MHP10 User Guide MEGGER RadioFans.CN 收音机爱 好者资料库 Safety Warnings2 General Description4 Features, Controlsand Connections5 Operation Testing Precautions11 Before each testing sequence12 Carrying out a test12 Switched Low Voltage probe LP213 120 k resistance Box14 Specification15 Acces

2、sories16 Repair and Warranty17 Symbols used on the instrument Caution:Refer to User Guide Risk of Electric shock Danger of death Protective Ground (Earth) Terminal Equipment complies with current EU Directives. Contents 2 RadioFans.CN 收音机爱 好者资料库 3 SAFETY WARNINGS High Voltage testing is hazardous. S

3、afety Warnings and Precautions must be read and understood before the instrument is used. They must be observed during use. Testing must only be carried out in a dedicated, demarcated, High Voltage testing area which is clearly marked. National and local safety codes and standards must be observed.

4、For safety, the instruments must be properly grounded (earthed). A separate protective ground (earth) lead must be correctly connected from the Protective ground (Earth) terminal to a reliable ground (earth) before testing. This is in addition to the ground (earth) wire in the power (mains) lead whi

5、ch must also be connected to provide a double level of safety. Suitable external interlocks must be used. The remote control unit is not a safety interlock and must not be used as such. The instrument, HV test probe, Low voltage test lead (or LV probe) and any remotely connected equipment must not b

6、e used if any part is damaged. The HV test probe and Low Return lead (or LV probe) must be confirmed as being in good order, clean, with no broken or cracked insulation before each test sequence. Exposed metal parts, including the HV probe tip, LV probe tip, Low return lead clip and the item under t

7、est must not be touched during testing, or until completely discharged. The High Voltage probe must only be held with the fingers and thumb behind the hand guard. Replacement fuses, parts and accessories must be of the correct type and rating. NOTE THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINE

8、D AND COMPETENT PERSONS RadioFans.CN 收音机爱 好者资料库 The MHP10 is designed for general Withstand (Flash) testing of electrical equipment and insulating materials. The instrument is operated from a nominal 230 V 50/60 Hz mains supply and has a variable output voltage providing up to 3 kV a.c. The instrume

9、nt is self contained in a sheet steel cabinet, with simple to use controls on the front face of the unit. Customer terminals, accessed behind a rear panel, enable connection for external relay control, external indicator beacon and external safety interlocks. An optional remote switch facility is av

10、ailable. The instruments have been designed for indoor use only and as such should not be used in harsh conditions or outside. The instruments are designed for Installation Category II use. Installation Category II relates to transient overvoltages likely to be met on grounded (earthed) receptacles

11、(socket outlets). The instrument is supplied with a 3 wire power cord. The instrument must be used 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 Neutral WhiteBlue Line (Phase)BlackBrown

12、Safety features include:- Interlock terminals enable automatic disconnection of the test voltage when accessing the device under test. High Voltage warning terminals provide a connection for a high visibility beacon. Two methods of control allow the user to select the best method for the type of tes

13、ting undertaken. Two independent methods of grounding (earthing), supply cord ground and an additional protective Ground (Earth) terminal located at the rear of the instrument, both of which must be used. General Description 4 Features, Controls and Connections 5 FAIL VOLTS POWER TRIP mA 0.5 3.5 10

14、20 30 40 50 HI-POT MHP10MEGGER BREAKDOWN BREAKDOWN TRIP/ TRIP STOPSTARTSTOP 0 0 2 1 34 11 9 675 8 1.Illuminated mains On / Off switch 2.Voltage control knob 3. Trip Level Switch Sets the current trip limit when testing with the trip or breakdown/trip mode. This level can be set to: 0.5 mA, 3.5 mA, 1

15、0 mA, 20 mA, 30 mA, 40 mA, 50 mA peak a.c. Warning:- The Trip level Switch does not limit the instantaneous current that can flow from the instrument prior to switchoff. Up to 12cycle delay will occur before switch off. 4.Test mode select switch There are two methods of automatically disconnecting t

16、he supply:- i) Breakdown The test voltage is applied until insulation breakdown (a sharp increase in current independent of continuous leakage current), or user intervention. ii) Breakdown / Trip As for Breakdown above, but the test voltage will also be removed automatically if the leakage current e

17、xceeds the limit set on the Trip Level Switch. iii) Trip The test voltage is automatically removed if the leakage current exceeds the limit set on the Trip Level Switch. Note:-The test voltage will only be removed automatically if the leakage current exceeds the limit set on the Trip Level Switch. 5

18、. Visual Test Fail indicator Illuminates to indicate when test conditions have been exceeded. An internal buzzer will also sound when the visual indication is active. 6. Output volt meter Used in conjunction with the Voltage control to set, and give an accurate indication of output test voltage. 10

19、7. High Voltage indicator When the instrument is generating high voltage the indicator is illuminated. The voltage on the terminals will be indicated on the voltmeter at all times. 8. High voltage a.c. output receptacle The HV receptacles used in the instrument are designed to accept a locking plug.

20、 To insert the plug, align the arrows on the plug with the open padlock symbol, push in, and then turn the plug through 90 to align the arrows with the closed padlock symbol. This will now lock the plug into the instrument. To remove, turn the plug to align the arrows with the open padlock symbol an

21、d withdraw. High Voltage probe The High Voltage probe is designed to lock into the High voltage receptacle and is fitted with a hand guard, and a spring loaded electrode cover which retracts as the probe is pressed to the item being tested. See Accessories for replacement probe. Warning:- The probe

22、must not be used in a damaged or dirty state. Do not touch any part of the HV probe in front of the guard or the device under test, until completely discharged. Warning:- Care must be taken not to touch the probe to any adjacent ungrounded (unearthed) metalwork such as pipes, window frames etc. as t

23、his may become hazardous live. 9.Low Return terminal The Low Return lead must be connected to this terminal. The terminal is internally connected to the instrument ground (earth). The Low Return lead is fitted with a hook connector so that it will not pull off the terminal. To check this lead, see B

24、efore each testing sequence. A replacement low voltage lead is available, see Accessories. 10. Start button Controls the high voltage output. Either of two modes of operation can be selected and set using a moveable link situated behind the rear panel cover:- i)The latched mode (link to the right) a

25、llows the user hands free operation. Operation of the Stop button, quickly followed by the Start button causes HV generation until the test fails, or the Stop button is pressed. ii) The unlatched mode (link to the left) requires the Stop button to be pressed, followed quickly by the Start button, wh

26、ich must be held in for the entire test. The test can be stopped at any time by releasing the Start button or by pushing the Stop button. The instrument will halt the test should the test parameters be exceeded. 11. Stop button When pushed the stop button:- Stops the test Resets a failure indication

27、. Initiates a start sequence. To avoid inadvertent test voltage application, the test Start sequence requires the Stop button to be pressed first, followed by pressing the Start button within 1 second. Features, Controls and Connections 6 1. Protective Ground (Earth) terminal For safety, the instrum

28、ents must be properly earthed. A protective ground (earth) lead must be correctly connected from the this terminal to a reliable ground (earth) before testing. Warning:-The IEC power supply cord connection to ground (earth) must not be solely relied upon. If the ground (earth) connection of the IEC

29、lead becomes disconnected, or defective, the metal instrument case could become live rising to the dangerously high output voltage of the instrument. A second ground must be connected to the protective ground terminal on the rear of the instrument. 2. R/C Remote On /Off receptacle The optional AVO r

30、emote On / Off unit RC1 plugs into this receptacle allowing remote activation of the unit (see Accessories). Warning:- The remote On / Off unit is not a safety interlock and must not be used as such. 3. IEC Line connector Provides a means of disconnection from the line supply. To gain access to the

31、line supply fuses, the Start button mode link, and the customer terminals, the IEC line connector 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, Start button mode link, and f

32、uses. 4. Fuse Replacement The fuses provide protection for the user and instrument. To gain access to the fuses, remove the IEC mains 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 fuses. Replacement f

33、uses must be of the correct type and rating. See Specification. 7 RELAY HV ON INTER -LOCK INTER -LOCK R/C 230V 50/60Hz 40VA 2 x T2A HBC IEC 127 LATCHED UNLATCHED N/O COM N/C 250V 8A MAX HV ON HV ON P2 - R P1 - R P1 - S P2 - S INTER -LOCK BLUEBELL PA 19422 DALLAS, TX 75237 - 1017 AVO International MA

34、DE IN UK. DOVER CT17 9EN. UK USA USA 1 2 1 3 Rear Panel 4 On the rear panel, other features of the instrument can be accessed:- Features, Controls and Connections 8 RELAY HV ON INTER -LOCK INTER -LOCK R/C N/O COM 2 x T2A HBC IEC 127 BLUEBELL PA 19422 DALLAS, TX 75237 - 1017 AVO International MADE IN

35、 UK. DOVER CT17 9EN. UK USA USA 230V 50/60Hz 40VA 2 x T2A HBC IEC 127 LATCHED UNLATCHED N/C 250V 8A MAX HV ON HV ON P2 - R P1 - R P1 - S P2 - S INTER -LOCK 5 6 Terminal connections and fuses 5. Start mode link (under cover plate) To gain access to the Start mode link, remove the IEC mains connector

36、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 Start button mode link. The link has two positions; to the left provides the unlatched mode, to the right provides the latched mode. Gently pull to remove the link

37、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 mains connector from the instrument. The screw holding the cover in position is then removed and the cover can be swung up out of the wa

38、y, 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 use of wire ferrules is recommended to eliminate stray strands of wire; recommended insulation strip length is 8 mm. The terminal screws

39、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 screw. Terminal connections and fuses The interface terminals are in three groups:- i)Relay Terminals The top three terminals are for appl

40、ications 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 When the Failed condition is active, the Common terminal is shorted to the Normally Open (N/O) terminal. When the Failedcondition is a

41、ctive 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 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 w

42、ay, exposing the interface terminals. ii)HV On Terminals Some regulations call for various signalling lamps to indicate hazardous and potential Risk situations. The terminals shown allow for the connection of a Line powered High Voltage On indicator or beacon. See Accessories for Warning beacon. A m

43、aximum 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 Closed Indicator Lamp Cable gland Cable gland Start mode linkStart mode link HV On HV On Cable gland Start mode link Line voltage at up t

44、o 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 terminals connected. The HV interlock terminals must be connected before the instrument will generate High Voltage. The Users HV safety inte

45、rlock 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 by a solid barrier that must be removed before access can be obtained to the hazardous area. The action of removing the barrier forces t

46、he interlock switches to the open position thus interrupting the supply voltage for the HV generation circuit. The interlock connections operate at Line (mains) voltage. All wiring connected to these terminals must rated for Line (mains) use and capable of carrying a current of 3 amps. Interlock con

47、nection 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 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 sufficien

48、tly 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 swung back into position and secured by replacing and tightening the cover plate retaining screw. Features, Controls and Connections 10 P

49、2 - R Guard in Open position Optional Ready to Test Indicator P1 - S P1 - R P2 - S Cable gland Cable gland Line voltage on terminals Start mode link Interlock switch (user supplied) Guard in Open Position 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 safety and that of others who may come into contact with dangerous voltages as a result of a