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Insulation Resistance Tester MIT520/2

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The Megger MIT520 insulation resistance tester os designed specifically to assist the user with the testing and maintenance of high voltage equipment. The instrument has a maximum reading of 10-kV and is designed in a user-friendly landscape style.
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Insulation Resistance Tester

 

MIT520/2

Megger MIT520/2 Resistance Tester Applications

The MIT520/2 is designed for testing the insulation of high-voltage electric equipment. The wide voltage range also allows applications for low-voltage equipment. Generators, motors, transformers, cables and switchgear all require effective maintenance. The test techniques on the instruments provide valuable diagnostic information. The MIT520/2 tests the insulation resistance of:

  • High-voltage power cables and high-voltage buses
  • Large motor/generator windings
  • Line and substation transformers

The MIT520/2 also performs spot tests, step-voltage tests, dielectric discharge tests and dielectric absorption tests for the following applications:

  • Acceptance testing at installation to check conformance to specifications
  • Routine preventive/predictive maintenance testing after installation
  • Quality assurance testing as part of the manufacturing process
  • Diagnostic testing to isolate faulty components for repair

Features

  • Part number MIT520/2
  • Manufactured by Megger
  • Accuracy at 23ºC
    • ±5% to 1 TΩ
    • ±20% to 10 TΩ
  • 50V to 5000V voltage range
  • 15 TΩ max reading
  • RS232 or USB download of results
  • 3 mA short circuit current
  • Line supply or battery operated
  • Digital/analog backlit display
  • Ingress protection to IP65
  • CAT IV 600 V safety rating

Specifications

Voltage input range 95-240 V ±10% rms 50//60 Hz and DC
Battery life 8 hours continuous testing at 5kV
Test voltages 50 to 1Kv in 10V steps
1Kv to 5kV in 25V steps
Accuracy (23°C) ±5% to 1TΩ; ±20% to 10TΩ
Guard 2% error guarding 500kΩ leakage with 100MΩ load
Display range Digital display 10kΩ to 15TΩ;
Analogue display 100kΩ to 1TΩ
Short circuit/charge current 3mA
Capacitor charge time ≤5 seconds per μF at 3mA
Capacitor discharge time
Capacitance measurement 10nF to 50μF (dependant on measurement voltage); ±5% ±5nF
Voltage output accuracy (0°C to 30°C) ±4% ±10V of nominal test voltage at 1GΩ load;
±25V for test voltages less than 500V
Current measurement range ±0.01nA to ±5mA ; ±5% ±0.2nA
Display Analogue/Digital 3 digits
Interference rejection 2mA rms @ 200VB and above
Timer range Counts up to 99 minutes from start of test
Dimensions 305 x 194 x 360 mm
Weight 7.1 kg
 
 
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