Megger MIT 525 Offers Many Great Features for Your Insulation Test Needs

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Megger-MIT1525The Megger MIT525 5-kV Insulation Resistance Tester can conduct automatic Step Voltage, Ramp and Dielectric Discharge tests quickly and easily. Generators, motors, transformers, cables and switchgear all require effective maintenance, and the test techniques on the Megger MIT525 provides valuable diagnostic information.

Megger MIT525 5-kV Insulation Resistance Tester.features:

• Analog and Digital display
• Operation through batteries or through AC mains
• Variable voltage from 50 Volts to 1 kiloVolts at 10 Volts increments
• Variable voltage from 1 kiloVolts to 5 kiloVolts at 25 volts increments
• Measurement of voltage, capacitance, time constant and leakage current
• Automatic Insulation Resistance, Polarization Index, Ramp, Step Voltage, Dielectric Discharge  and Dielectric Absorption Ratio testing
• Built-in timer control and display
• 3 milliampere test current
• Measurement of resistance from 10 kΩ to 10 TΩ
• USB and RS232 ports
• Real time clock
• Alarm limit mode

Megger MIT525 5-kV Insulation Resistance Tester.Specifications:

Insulation Range, Analog

100 kΩ to 10 TΩ

Insulation Range, Digital

10 kΩ to 10 TΩ

Test Voltages

250 V, 500 V, 1000 V, 2500 V, and 5000 V

User Defined Test Voltages

100 V to 1 kV in 10 V steps,
1 kV to 5 kV in 25 V steps

Accuracy (23º C)

±5% to 1 TΩ, ±20% to 10 TΩ

Voltage Output Accuracy (0ºC to 30ºC)

+4% -0% ±10 V of nominal test voltage at 1 GΩ load

Voltmeter Range

30 to 660 V ac or dc, 50/60 Hz

Short Circuit Current

3 mA nominal, max. power on all loads outperforming many 5 mA testers

Insulation Alarm

100 kΩ to 1 GΩ

Current Measurement

Range: 0.01 nA to 6 mA
Accuracy: ±5% ±0.2 nA at all voltages

Capacitance Range (above 500 V)

10 nF to 25 µF (dependent on measurement voltage);
Accuracy (23ºC): ±10% ±5 nF

Capacitor Charge

<3 s per µF at 3 mA to 5 kV

Capacitor Discharge

<250 ms/µF to discharge from 5000 V to 50 V

Timer Range

Up to 99 minutes, 15 seconds minimum setting

Memory Capacity

5-1/2 hours continuous logging every 5 s.
or 33 logged PI tests
or 350 logged IR tests

Industry-Standard Tests

IR, IR(t), DAR, PI, SV, DD, Ramp Test


USB type B (device)

Real Time Output

USB, 1 reading/second (voltage, current and resistance)

Interference Rejection

1 mA per 250 V up to a maximum of 3 mA

Guard Terminal

2% error guarding 500 kΩ leakage with 100 mΩ load

Voltage Input Range

85 to 265 V, 50/60 Hz, 60 VA

Battery Type

Lithium-ion, 11.1 V, 5.2 A hour, meets IEC 62133:2003

Battery Life

Typical capacity 6 hours continuous at 5 kV with a 100 MΩ load

Ingress Protection

IP65 (lid closed); IP40 (lid open)


3000 m, CAT rating maintained >2000 m (test load connected)

Each Protec office maintains a full complement of electrical test and measurement equipment. Offering equipment from all of the premiere manufacturers for rent, lease or purchase, Protec has the electrical testing equipment you need to get the job done.

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