Ground/Insulation Resistance Tester

LQ-5kV Megohmmeter - 10mA High-Capacity Insulation Tester for Substations & Cables

The LQ-5kV Megohmmeter delivers 0.1-5kV adjustable output with 10mA short-circuit current for testing large transformers and buried cables without lead disconnection.

US$1.00; Negotiated Price
Lead time: 30days

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Product Details

Product Tags

LQ-5kV Megohmmeter: Heavy-Duty Insulation Testing for Power Infrastructure

The LQ-5kV Megohmmeter combines 10mA output current and 0.1-5kV adjustable voltage to test insulation resistance in 500kV substations, power plants, and underground cables. Its 2mA (50Hz) anti-interference capability enables accurate measurements without disconnecting live systems.

Product Parameters

Technical parameters

Measurement voltage range	0.1kV、0.25kV、0.5kV、1kV、2.5kV、5kV
Measurement voltage accuracy	±(5%＋10V)
Short circuit current	10mA

Measurement range and accuracy

Measurement range	Resistance measurement range	Accuracy
20MΩ	0.01～19.99MΩ	±(5%+3d)
200MΩ	5.0～199.9MΩ	±(5%+3d)
2000MΩ	50～1999MΩ	±(5%+3d)
20GΩ	0.5～19.99GΩ	±(5%+3d)
200GΩ	5.0～199.9GΩ	±(10%+3d)
2000GΩ	50～1999GΩ	±(20%+10d)

Basic parameters

Anti-electric field interference ability	2mA(50/60Hz)
Time and alarm functions	maximum value of stopwatch is 19 minutes and 59 seconds. 20 minutes for a cycle. The stopwatch will tell the time at these time points: 15 seconds, 60 seconds and every 60 seconds.When telling time, resistance readings hold for 3 seconds.If the measured resistance is below the lower limit of range, the reading is invalid and the instrument will continuously sound to give an alarm.
Display	three and a half bits LCD digital meter (three), respectively show test voltage, test resistance, test time.
Power supply	DC: rechargeable lithium battery, DC15V power supply. With AC (50 / 60Hz) special adapter access port to charge the battery.
Operating Conditions	Temperature：-20℃～+40℃；Relative humidity：20%～90%
Dimensions	315×240×180mm³
Weight	5.5kg

Industry Challenges Solved

Large Capacitance Equipment: 10mA current charges 1000μF+ windings/cables
Field Interference: Tests accurately in 500kV substations (2mA noise rejection)
Remote Testing: Portable design for buried cable diagnostics