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5 kV and 10 kV lead sets

Insulation resistance testers

  • » Safety Warning must be observed during use.
  • » The circuit under test must be switched off, de-energised, isolated and checked to be safe before insulation test connections are made. Make sure the circuit is not reenergised whilst the instrument is connected.
  • » Circuit connections must not be touched during an insulation test.
  • » After completing a test, capacitive circuits must be completely discharged before disconnecting the test leads. Capacitive charges can be lethal.
  • » Tested items should be firmly shorted out with a shorting link, after discharge, until required for use. This is to guard against any stored dielectric absorption charge subsequently being released thereby raising the voltage to potentially dangerous levels.
  • » Test leads, including crocodile clips, must be in good order, clean, dry and with no broken or cracked insulation.
  • » The leadset should not be used if any part of it is damaged.
  • » These accessories are not designed to provide full levels of safety isolation to the operator if touched. The required physical dimensions would render this impractical. Safe working practices must be used.

Description

Megger provide a range of lead sets and clips of different sizes and electrical characteristics for use with Megger 5 kV and 10 kV insulation resistance testers, enabling the user to choose the most applicable lead set for the work in hand. The design of the lead sets is intended to facilitate connection to a variety of de-energised systems for the purpose of making insulation resistance measurements. In all cases it is the responsibility of the user to employ safe working practices and verify that the system is safe before connection. Even isolated systems may exhibit significant capacitance which will become highly charged during the application of the insulation test. This charge can be lethal and connections, including the leads and clips, should never be touched during the test. The system must be safely discharged before touching connections. These lead sets are suitable for use with all current Megger 5 kV and 10 kV insulation resistance testers except the BM11, BM15 and MJ15.


BM12, MJ10

Mutlivoltage Analogue Insulation and Continuity Testers

  • » Standard d.c. test voltages 100 V, 250 V, 500 V and 1000 V
  • » Guard terminal
  • » Continuity range with polarity reversal
  • » Automatic capacitive circuit discharge facility
  • » Voltage range for indicating an energized circuit and monitoring discharge

Description

The Major Megger® insulation and continuity testers MJ10 and BM12 are modern, portable, self-contained instruments designed to give rapid and accurate measurements. They have four d.c. insulation testing voltages 100 V, 250 V, 500 V and 1000 V, and a single insulation resistance range of up to 2000 MΩ. Similarly, continuity is measured, with either polarity, on a single 0-4 Ω range.

Power for the MJ10 instrument is derived from a low voltage, hand-cranked generator which has been designed to be easy to turn even under full load conditions. The low voltage generator is connected to an electronic inverter to provide a very stable test voltage. Accuracy of measurement is unaffected by variations in the generator cranking speed and the test voltage is maintained at its rated value to as low as 1 MΩ at 1000 V or 0,5 MΩ at 500 V. The BM12 has a similar specification and circuitry to the MJ10 but it is powered by internal, replaceable batteries.

As a safety feature, the a.c. voltage range becomes effective as soon as the instrument is connected to the circuit under test. Thus, a warning is given that the circuit is not deenergized before the instrument is operated. Though calibrated for a.c. voltage, this range also acts as a monitor for the automatic discharge facility, so that after equipment having capacitance, e.g. a cable, has been tested, an indication can be given that the voltage has discharged to a level which is safe for removing the test leads.

Every instrument has a guard terminal which may be used to prevent the effects of surface leakage from influencing the readings. This is achieved by diverting the leakage current through the guard terminal and away from the instrument’s measuring circuit. The continuity measuring function has the facility for reversing the polarity of the test current, without altering the test leads. The operator may then eliminate the effects of standing e.m.fs. etc. by averaging the measurements made with both polarities.

Each instrument is robust, lightweight and built into a strong, polycarbonate case. All readings are given directly on an analogue meter with a white on black scale, an orange ‘dayglow’ pointer. The ranges are selected by a rotary switch and a ‘Test’ push-button is pressed to execute a test. On the MJ10 the button is pressed and the generator handle turned simultaneously. Batteries for the BM12 fit into a compartment accessible from the bottom of the case and a check of the battery condition can be made by operating a second push-button.

The test leads supplied have right angled connectors and, when fitted to the instrument’s recessed terminals, the carrying handle folds down over them. These features help to ensure that the leads are not accidentally pulled out of the terminals during a test.


BM15 MJ15

Analogue 5 kV Insulation Tester

  • » Four test voltages to 5 kV
  • » Dual power supply option giving the best of both worlds
  • » Resilient mounted analogue scale for robustness
  • » Voltage range to 600 V indicates auto discharge
  • » Pass/fail overlays for rapid testing
  • » Single scale for insulation values to avoid operator error

Description

The Megger® BM15 & MJ15 are compact 5 kV insulation testers. They are very simple to use and provide a quick and accurate reading of insulation resistance. The instruments use an analogue display with a maximum reading of 20 GΩ. The BM15 is powered by batteries. The MJ15 has an additional hand-cranked generator

The instrument operation is extremely simple. A voltage range enables measurement of a.c. or d.c. conductor potential. Four test voltages are available at 500 V, 1 kV, 2,5 kV and 5 kV. A choice of push buttons is supplied; a locking button simplifies long term testing, or a nonlocking version is preferred for maximum safety.

A bezel allows a scale plate overlay to be added with pass/fail bands for go/no go testing. This is particularly useful for less experienced users and enables a rapid decision to be made.

The new instruments have a choice of power source. The BM15 is powered by 8 x LR6 (AA) alkaline cells. The MJ15 comes with a hand cranked generator plus batteries. If the test button is pressed the MJ15 uses battery power. Otherwise the crank handle is turned to save battery power or for use when the batteries are unavailable.

Both units are built into a rugged case designed for outdoor use. The instruments are also supplied with a soft carrying case, a test lead set, test record cards and batteries.

Safety terminals suitable for locking connectors are used for connection to the test piece. An automatic discharge circuit eliminates the voltage on capacitive loads after a test. The decaying voltage can also be viewed on the scale.

Fused test leads are available as an option for voltage measurement. The instruments meet the IEC1010 safety specification and EMC specifications and are fully CE marked.

 

Features

» Large, single scale analog display
» Auto voltage measurement function indicates conductor and auto discharge potential
» Supplied with optional locking test button
» Safety recessed terminals and long connectors
» Four output test voltages
» Simple to use
» CE marked
 
» Dual power supply option on MJ15
» Unique scale overlay for pass/fail bands
» Resilient mounted analogue scale for robustness
» Single scale for insulation values to avoid operator error
» Light weight and rugged
» Range down to 100kΩ ideal for go/no go testing

 


BM5200

Insulation Resistance Tester

  • » 1 TΩ, 1.4 mA, 5 kV digital insulation tester with digital and analogue display
  • » Five test ranges; 250 V, 500 V, 1000 V, 2500 V and 5000 V
  • » Insulation (InS), Polarisation Index (PI) and variable timed test (t) modes
  • » Selectable DC or AC (incl. frequency) voltmeter functions
  • » Guard terminal to shunt surface leakage currents
  • » CATIII 600 V safety rating

Description

The Megger BM5200 tester is a battery powered instrument with digital and analogue arc display, designed for high voltage insulation resistance testing in the maintenance and servicing of cables, rotating plant machinery, transformers, switchgear and industrial installations.

DC insulation tests are performed at 250 V, 500 V, 1000 V, 2500 V and 5000 V. Insulation resistance measuring range is 100 kΩ to 1000 GΩ. Automatic discharge for capacitive circuits under test is provided and decaying voltage displayed.

The guard terminal can be used to minimise the effects of surface leakage and hence erroneous measurements when carrying out insulation resistance tests.

Three insulation resistance (IR) test modes are provided, (InS, PI and t) and available in any IR test range. In IR mode (InS) tests are initiated by pressing and holding down the TEST button for two seconds and terminated by a second press of the TEST button. A Polarisation Index (PI) mode performs a ratio metric test that calculates the ratio of insulation resistance at ten minutes to insulation resistance at one minute. The IR test timer (t) mode facilitates a single fixed time test based on the set time interval t.

For capacitive test objects the instrument will automatically discharge through an internal resistor and indicate voltage across the terminals in the range 25 V to 600 V with higher voltages indicated by ‘>600 V’. This feature will give decaying voltage indication following the testing of reactive loads. When the voltage indicator disappears it is safe for the user to disconnect the test leads.

The BM5200 is powered by eight 1.5 V IEC LR6 (AA) cells. Design safety features include high voltage warning indicator, external voltage display after IR test, automatic discharge of reactive loads and test leads.

 

Features and Benefits

» Compact, rugged insulation resistance tester
» Easy operation and voltage range selection
» AC and DC voltmeter (25 V - 600 V)
» User settable IR test timer (default 1 min), (max. 19 m 50 s)
» Soft carry case for instrument and leads
» Quick start and full user guide

 


Diagnostic insulation testing digest

Insulation defects are the most common cause of electrical failure or damage. Regular testing of the quality of the insulation is a decisive part of every maintenance program. Only by regular testing can you get the information required to minimize Equipment failure and to plan investments and maintenance programs. Comparing the results of a simple test of the insulation resistance against the limits established for the equipment gives a pass / fails decision. But is a "pass" really a good result? What does fail mean? Where is the problem?
 

Key specification point when selecting an instrument

1. Resistance range and accuracy
  » You cannot analyse infinity or inaccurate readings
2. Test current output
  » Less time to charge capacitance
» Applies higher voltage at lower insulation values
3. Test Voltage
  » Higher voltage means more current to measure, 10kV option can also test to IEEE standard for testing
4. Noise Immunity
  » Important in noisy environments. Induced currents from adjacent powered up equipment can render some test instruments
5. Analogue & Digital display
  » Analogue shows variation, digital precise values.

 


MIT200 Series

Digital/Analog Insulation and Continuity Testers

  • » Insulation testing to 1000 MΩ
  • » Continuity testing at 200 mA down to 0.01 Ω
  • » Live circuit warning (voltage display) and test inhibit
  • » Digital/Analog display
  • » Alkaline or rechargeable batteries
  • » –10ºC to +55ºC operating temperature
  • » CATIII 600 V
  • » Conforms to EN61557-1

Description

The MIT200 is one of the smallest insulation testers available on the market today. With options of one, two and three voltage test voltage instruments, the MIT200 instruments offer a range of safety and operation features.

The display offers a combination of digital readout and analog display, using Megger’s patented DART display technology, which includes the benefits of an LCD display, such as robust, clear and accurate measurement, with an analog pointer response for evaluating circuit charge and discharge characteristics.

The instrument housing is in tough ABS, designed to withstand the rigours of hard use, and is small enough to drop into your pocket when not in use.

Battery requirements are 6 AA batteries of either standard alkaline or nickel metal hydride (NiMH) rechargeable type. A low battery warning indicator gives advanced warning of exhausted batteries.

 

Features and Benefits Summary

» Meets the international EN61557 requirements of the rated test voltage into a 1 mA load.
» Digital display of insulation measurement up to 1000 MΩ on a logarithmic analogue arc and a digital display.
» Continuity range has 0,01 Ω resolution and a short circuit current in excess of 200 mA.
» Automatic continuity testing leaves both hands free. No need to press the test button.
» Automatic power-off if left unattended reduced wasted battery life.
» Automatic voltage detection avoids accidental contact with live circuits.
» Test lead zero allows compensation for test lead resistance.
» Buzzer range operates at <2 Ω.

 


MIT300 Series

Insulation and Continuity Testers

  • » Extremely easy to use
  • » Tough rubber armoured case
  • » Self contained protective cover
  • » Live circuit warning
  • » Weatherproof to IP54
  • » Intelligent Safety System for protection.
  • » Result storage and downloading
  • » Download software included
  • » USB interface

Description

The Megger MIT300 series features:

Digital or Analogue: The Megger MIT300, MIT310 and MIT320 all feature the popular Megger digital/analogue display. Large 20mm high characters provide very clear readout, combined with an analogue arc for the feel of an analogue instrument, with a true analogue response.

The Megger MIT310A has a moving coil display for those who prefer a real moving needle. Black decals on a white background give high contrast, even in poor light conditions.


MIT400 CAT IV

Industrial Insulation Testers

  • » CAT IV 600 V applications
  • » TRMS & DC Voltage measurement
  • » Insulation testing up to 1000 V and 200 GΩ
  • » Continuity testing at 200 mA or 20 mA down to 0.01 Ω
  • » Pass/Fail limit alarms
  • » Combined Analogue and dual digital display
  • » PI/DAR and Timer function
  • » Test result storage (MIT420)
  • » Bluetooth® wireless data transfer (MIT430)

Description

The new Megger MIT400 series insulation and continuity testers has been designed for electrical testing by the utilities, industrial, commercial and domestic electricians. The wide range of features also makes the MIT400 series ideal for the maintenance and service/repair engineer.

They replace the well-established BM400 insulation tester range, given greater functionality with simplified operation, greater application range and increased safety.

The range
The range consists of five instruments:

MIT400 250 V, 500 V and 1000 V
MIT410 50 V, 100 V, 250 V, 500 V and 1000 V + PI, DAR
MIT420 50 V, 100 V, 250 V, 500 V & 1000 V + PI, DAR and result storage
MIT430 50 V, 100 V, 250 V, 500 V & 1000 V + Bluetooth download
MIT40X 10 V to 100 V in 1 V steps

MIT480 Series

Telecommunications Insulation Testers

  • » Insulation testing from 50 V to 1000 V
  • » Up to 200 GΩ range
  • » 75 V test inhibit
  • » TRMS & DC Voltage measurement
  • » Continuity testing at 200 mA or 20 mA
  • » Capacitance measurement to 10 uF
  • » Cable length by capacitance
  • » Silicone test leads

Description

The Megger MIT480 series instruments have been developed specifically for the telecommunications industry. The insulation and continuity testers combine the latest range of measurement techniques with new instrument design to provide a state-of-the-art tester that is compact and comfortable to hold.

The MIT480 series directly replaces the well-established BM80 product group, given greater functionality with simplified operation and greater application range.

The range

MIT480   50 V, 100 V tester
MIT481   50 V, 100 V, 250 V, 500 V, 1000 V tester
MIT485   As 481 plus downloading results

 

Features and Benefits Summary

» Meets the international EN61557 requirements of the rated test voltage into a 1 mA load.
» Digital display of insulation measurement up to 1000 MΩ on a logarithmic analogue arc and a digital display.
» Continuity range has 0,01 Ω resolution and a short circuit current in excess of 200 mA.
» Automatic continuity testing leaves both hands free. No need to press the test button.
» Automatic power-off if left unattended reduced wasted battery life.
» Automatic voltage detection avoids accidental contact with live circuits.
» Test lead zero allows compensation for test lead resistance.
» Buzzer range operates at <2 Ω.

 


MIT510/2

5 kV Insulation Resistance Tester

  • » CAT IV 600 V
  • » Mains or battery powered
  • » Digital/Analogue backlit display
  • » Selectable test voltage from 250 to 5000 V
  • » Automatic IR test
  • » Measures to 15 TΩ
  • » Complete with calibration certificate

Description

The new 5 kV insulation resistance testers from Megger are designed specifically to assist you with the testing and maintenance of high voltage electrical equipment. The case is incredibly rugged and easy to carry, being made of tough polypropylene and achieving an ingress protection rating of IP65. In addition, the model number is marked on both sides of the case for ease of identification in stores or vehicles.

The instrument has a large easy to read backlit LCD display making it equally suitable for use in both bright sunlight and poorly lit environments. Information displayed includes resistance, voltage, leakage current, capacitance, battery status and time constant. In addition, the elapsed time of the test is displayed constantly removing the need for separate timers.

The instrument can test when being powered by the mains or its internal rechargeable battery, a great benefit when site conditions are unknown or long term testing is required.

The controls of the instrument are clear and unambiguous and a "quick start" guide is included in the lid of the instrument removing the need to carry bulky manuals under site conditions.

The instrument is fitted with a guard terminal to enhance accuracy. The guard test lead is included as standard with the instrument.

To further enhance the flexibility of the instrument the MIT510/2 has the facility to set the test voltage in steps from 250 V to 5000 V avoiding the expense of several insulation resistance testers to meet your application needs.

The IR tester is designed to meet the highest safety standards and meets the requirements of EN61010. In addition, the instrument measures the voltage at the terminals and if this is above 50 V then the instrument will display the high voltage warning and inhibit testing. At the end of the test the instrument will automatically discharge the energy transferred to the equipment during the test phase.

 

Features and Benefits Summary

» Meets the international EN61557 requirements of the rated test voltage into a 1 mA load.
» Digital display of insulation measurement up to 1000 MΩ on a logarithmic analogue arc and a digital display.
» Continuity range has 0,01 Ω resolution and a short circuit current in excess of 200 mA.
» Automatic continuity testing leaves both hands free. No need to press the test button.
» Automatic power-off if left unattended reduced wasted battery life.
» Automatic voltage detection avoids accidental contact with live circuits.
» Test lead zero allows compensation for test lead resistance.
» Buzzer range operates at <2 Ω.

 


MIT520 and MIT1020

5 kV and 10 kV Insulation Resistance Testers

  • » Mains or battery powered
  • » Digital/analogue backlit display
  • » Variable test voltage from 50 to 5000 or 10,000 V
  • » Automatic IR, PI, DAR, SV and DD tests
  • » Measures to 15 TΩ (5 kV) and 35 T½ (10 kV)
  • » RS232 and USB download of results to Megger Download Manager
  • » On board memory for results storage

Description

The new 5 & 10 kV insulation resistance testers from Megger are designed specifically to assist you with the testing and maintenance of high voltage electrical equipment. IEEE 43-2000 recommends the use of 10 kV for motor windings rated above 12 kV and the Megger MIT1020 facilitates this. The case is incredibly rugged and easy to carry, being made of tough polypropylene and achieving an ingress protection rating of IP65. In addition, the model number is marked on both the top and side of the case for ease of identification in stores or vehicles.

The instruments have a large easy to read backlit LCD display making it equally suitable for use in both bright sunlight and poorly lit environments. Information displayed includes resistance, voltage, leakage current, capacitance, battery status and time constant. In addition, the elapsed time of the test is displayed constantly, removing the need for separate timers. Adjustable timers and limit alarms are included.

The instrument can test when being powered by the mains or its internal rechargeable battery, a great benefit when site conditions are unknown or long term testing is required.

The controls of the instrument are clear and unambiguous and a "quick start" guide is included in the lid of the instrument removing the need to carry bulky manuals under site conditions.

The instrument is fitted with a guard terminal to enhance accuracy. The guard test lead is included as standard with the instrument.

To further enhance the flexibility of the instruments both have the facility to set the test voltage in steps from 50 V to the maximum output voltage avoiding the expense of several insulation resistance testers to meet your application needs.

These IR instruments are designed to meet the highest safety standards and meets the requirements of EN61010. In addition, the instrument measures the voltage at the terminals and if this is above 50 V then the instrument will display the high voltage warning and inhibit testing. At the end of the test the instrument will automatically discharge the energy transferred to the equipment during the test phase.

The MIT520 and MIT1020 are equally suited to routine testing and diagnostic regimes being pre-programmed with IR, PI, DAR, SV and DD profiles.

 

Features and Benefits Summary

» Meets the international EN61557 requirements of the rated test voltage into a 1 mA load.
» Digital display of insulation measurement up to 1000 MΩ on a logarithmic analogue arc and a digital display.
» Continuity range has 0,01 Ω resolution and a short circuit current in excess of 200 mA.
» Automatic continuity testing leaves both hands free. No need to press the test button.
» Automatic power-off if left unattended reduced wasted battery life.
» Automatic voltage detection avoids accidental contact with live circuits.
» Test lead zero allows compensation for test lead resistance.
» Buzzer range operates at <2 Ω.

 


WM6

Insulation and Continuity Tester

  • » Pocket-sized, self-powered instrument - no battery maintenance problems
  • » Tests at 500 volts d.c.
  • » Powered by an easy-to-turn, low-voltage, ac brushless generator

Description

The Megger® WM6 tester is a self-contained instrument designed to give rapid and accurate resistance measurements. The hand-operated generator is coupled with the latest electronic technology, thus allowing the WM6 to test insulation at 500 V d.c. up to 200 MΩ.

A low-voltage, hand-cranked, a.c. brushless generator, which is easy to turn by hand, is the power source. It is connected to a stabilized electronic invertor to provide the test voltage. All resistance readings are given directly on a moving-coil meter with a rugged taut-band suspension movement, a white-on-black scale and an orange “dayglow” pointer. This gives goodlegibility in most lighting conditions.An electronic circuit is used to give a four-decade resistance scale for insulation measurement.

There is a slider switch for selection of either the insulation resistance or continuity functions, and the strong ABS plastic case has a recess to accommodate the foldedaway generator handle for compactness. Two 4-mm terminal sockets are fitted into the side of the case for connecting the test leads.

 

Features

» Pocket-sized, self-powered instrument — no battery maintenance problems.
» Tests at 500 V d.c..
» Powered by an easy-to-turn, low-voltage, a.c. brushless generator.
» Stabilized electronic invertor.
» Resistance readings given directly on a moving-coil analogue meter.
» Simple, two-position function selector switch.
» Robust ABS plastic case.


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