Hioki IR5051-90 – High Voltage Insulation Tester with PV Function and Wireless Adapter

• Measure solar PV system insulation resistance safely and accurately while generating
• Measure insulation of high-voltage equipment (such as transformers, cables, and motors)
• Wide testing voltage range, 250 V to 5000 V DC
• Wide measurement insulation range, up to 10 TΩ
• Includes wireless adapter

The IR5051 is a compact, lightweight, high-voltage insulation resistance tester capable of outputting up to 5 kV. Its unique measurement technology enables stable measurements of up to 10 TΩ. In addition, the IR5051 is capable of testing the insulation resistance of solar PV systems during power generation, and has a CAT III 2000 V safety rating to allow testing of 2000 V PV systems.

Effectively measures 1500 V solar PV systems and is prepared to accommodate systems up to 2000 V as technology advances. Complies with IEC 62446-1 for Category 1 and Category 2 tests, ensuring robust safety and performance

*Note: Model IR5051-90 (this model) includes a wireless adapter. The standard IR5051 does not.

Please see the table below for a summary of the models available in this series.

The CAT III 2000 V and CAT IV 1000 V rated IR5051 can measure insulation resistance and open-circuit voltage in solar power systems up to 2000 V safely.

The IR5051 has a PV insulation resistance measurement function. It features the ability to measure even while PV systems are generating power. This means you don’t have to wait until night for measurement or stop power generation.

The CAT III 2000 V and CAT IV 1000 V rated IR5051 can measure insulation resistance and open-circuit voltage in solar power systems up to 2000 V safely.

1. Use the IR5051’s dedicated PV insulation function to measure the insulation resistance of solar strings during operation and detect faulty strings.

2. Measure the voltage at the disconnect switch and send it to GENNECT Cross; the software will locate the panel with the ground fault. This IR5051 is capable of safely and accurately measuring voltages up to 2,000 V DC.

Easy-to-use insulation resistance meter with intuitive rotary knob operation.

• Selectable output voltage with 5 range settings for insulation resistance testing.
• Adjust the output voltage between 250 V and 5 kV in increments of 10 V or 25 V to accommodate specific testing needs.
• Automatic AC/DC detection for seamless voltage measurement

When a high test voltage is continuously applied to the circuit under test, the insulation may break down. Failures caused by the application of a high voltage can be prevented by keeping the applied voltage as low as possible while testing the insulation.

The IR5051 is equipped with various insulation diagnostic functions, allowing you to choose the optimal measurement method according to the testing application.

After measurement completes, the instrument can display more than just the insulation resistance and leakage current, but also judgement index values of PI, DD, and DAR. It calculates these indexes based on the measured values and displays it as a pass/fail judgment.