Electro-Meters: Megger MIT520 & MIT1020 series, Insulation Testers


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Megger ^® Megger MIT510, MIT520 & MIT1020 Series 5kV and 10kV InsulationTesters


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Megger MIT510, MIT520 and MIT1020 Insulation Testers

Characteristics:

Mains or battery powered
Digital/analog backlit display
Variable test voltage from 50 to 5000 V
Automatic IR, PI, DAR, SV and DD tests
Measures to 15 TΩ (5 kV) and 35 TΩ (10 kV)
RS232 and USB download of results

Product 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 IP54. 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. 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.

General Information:

MIT510
- Increased measurement range to 15 TΩ, replacing the umbiguous "infinity" reading with an actual number that can be used for predictive/preventitive trending.
- Expanded test voltage range from 50V to 10kV, in 10V increments to 1kV and 25V above 1kV
- Additional automated standardized tests to include Step Voltage, Dielectric Absorption Ratio and Dlielectric Discharge tool
- Capability to measure capacitance of test item from 1 nf to 50µF, providing the operator with an additional analytical tool
- Testing is inhibited above 50V of external voltage, for redundant safety

MIT520 (same as above with further flexibility)
- Test voltages can be set in any 10V increment from 50V to 1kV, and above 1kV in 25V increments
- RS232 and USB to download results
  - 5 industry-standard tests
  - Insulation Resistance (IR)
  - Dielectric Absorption Ratio (DAR)
  - Polarization Index (PI)
  - Dielectric Discharge (DD)
MIT1020
- Increased measurement range to 35 TΩ, in order to provide trending values for the best insulating materials and highest capitalequipment.
- Expanded test voltage range from 50V to 10kV, in 10V increments to 1kV and 25V above 1kV
- Additional automated standardized tests to include Step Voltage, Dielectric Absorption Ratio and Dlielectric Discharge tool
- Capability to measure capacitance of test item from 1 nf to 50µF, providing the operator with an additional valuable tool
- RS232 and USB to download results

Specifications:

Insulation Ranges	MIT510 & MIT520	MIT1020
Test Voltages:	50 V to 1 kV in 10 V steps, 1 kV to 5 kV in 25 V steps	50 V to 1 kV in 10 V steps, 1 kV to 10 kV in 25 V steps
Insulation Resistance Range:	Digital display: 10 kΩ to 15 TΩ (MIT520) to 35 TΩ (MIT1020) analog display: 100 kΩ to 15 TΩ (MIT520) to 35 TΩ (MIT1020)
Accuracy	±5% to 100 GΩ ±20% to 15 TΩ (MIT520) to 35 TΩ (MIT1020)
Short Circuit Current	3 mA
Voltage	MIT510 & MIT520	MIT1020
Accuracy:	±2% ±1 V of nominal test voltage at 100 MΩ load ±25 V for test voltages less than 500 V
Voltage input range:	85-260 V, 50/60Hz
Current
Range :	±0.01 nA to ±5 mA
Accuracy:	±5% ±0.2 nA at all voltages
Capacitance	MIT510 & MIT520	MIT1020
Capacitor discharge time:	≤5 seconds per µF to discharge from 5000 V to 50 V	≤5 seconds per µF to discharge from 10000 V to 50 V
Capacitor charge time:	≤5 seconds per µF at 3mA
Capacitance measurement:	1 nF to 50 µF (measured with test voltage ≥200 V)
Accuracy:	±5% ±5 nF