Insulation Resistance Tester

This product series enables comprehensive quality inspection testing and quality control for electric motors. The system utilizes an industrial computer for centralized control, completing all test items with a single wiring connection, and automatically analyzes, judges, statistics, stores, and prints the test results (printer to be provided by the buyer). All user parameters can be preset for invocation during testing.

Test Items: DC Low Resistance, Insulation Resistance, Electric Strength (Leakage Current Test), Interturn Impulse Test.

Technical Parameters:

1、Winding DC Low Resistance

Apply DC to both ends of the winding, measure the temperature and winding resistance under the current environment, and convert to the resistance value at a specified temperature (20°C or 25°C), with judgment for resistance value and resistance unbalance.

Test Range 5mΩ～20000Ω

Measurement Accuracy ±（0.2% reading + 5 digits）

Temperature Measurement（0.0～60.0）℃，Accuracy：±0.5℃

Three-Phase Resistance Unbalance Rate 0.0％～99.9％

2、Insulation Resistance (Winding to Casing)

Test Condition DC 200V～1000V

Accuracy ±（0.5% set value + 10V）

Resistance Range 1MΩ～2000MΩ

Accuracy 1～100MΩ，±（0.5％×display value + 5 digits）

100-1000MΩ，±（0.5％×display value + 5 digits）

Test Time 0.0-999.9S

3、 AC Withstand Voltage (Winding to Casing)

Test Condition 300～3000V AC

Voltage Accuracy ±（0.5% reading + 3V）

Current Range 0.10～5.00mA

Current Accuracy ±（0.5% reading + 5 digits）

Test Time 0.0-999.9S

Arc Detection 1-30 levels, 0 for off

4、 Interturn

Apply an impulse voltage of a certain amplitude and waveform to both ends of the winding, compare the oscillation waveform with the standard waveform, and assess the degree of difference between the waveforms.

Interturn waveform comparison requires two methods: 1. Comparison with sampled waveforms. 2. Mutual comparison between two windings.

Pulse Voltage Peak 500～3000V

Voltage Accuracy ±（0.5% reading + 5V）

Wavefront Time ≤0.5µs

Waveform Acquisition Sampling Frequency: 5kHz~20MHz, Resolution: 8-bit AD

Storage Depth: 1k bytes, Multiple Tests: (1~30) times continuous

Discrimination Method Area, Difference Product