HIOKI L9787 Insulation Tester Test Lead | With alligator clip, 1.2 m long, CAT III 600 V, 10 A, standard with IR4056-20／IR4053-10

HIOKI L9787 Insulation Tester Test Lead: With Alligator Clip, CAT III 600V, Standard with IR4056-20／IR4053-10

Overview

In high-voltage panel maintenance, solar PV system acceptance and motor insulation testing, insulation resistance tests often apply DC test voltages as high as 1000V. Using third-party test leads with non-conforming specifications or insufficient voltage rating can cause reading errors from high-voltage leakage and poses serious risks of electric shock and equipment short circuits. The genuine authorized HIOKI (Japan) product L9787 insulation tester test lead (a complete set with ground-side and line-side leads) is the standard accessory for high-voltage insulation testing.

The set uses high-grade, high-voltage double-insulated wire with strong resistance to pulling and oil contamination. With a fine, highly conductive probe and an alligator clip, it grips ground terminals and busbars of various sizes securely. Whether for routine safety testing or solar plant acceptance, the L9787 provides dependable protection and stable measurements.

Key Technical Specifications

High-Voltage Insulation and Safety Design

• Double-insulated wire rated for high-voltage pulses: Flexible, highly insulated genuine HIOKI wire withstands the high-voltage test current from a megohmmeter, guarding against high-voltage leakage and shock hazards.
• Strong-grip alligator clip and precision probe: The ground side has a high-tension spring alligator clip that holds ground busbars and metal enclosures firmly; the line-side probe tip conducts well, and its insulating sleeve guards against accidental contact with nearby live parts.

Compatible Models

• Compatible with HIOKI insulation resistance testers (megohmmeters):
• Standard with: IR4056-20, IR4053-10 (also previously standard with the discontinued 3490 and IR4016).
• Optional or replacement for: IR4057-50, IR4059.

• Rating: CAT III 600V／CAT II 600V, 10 A, 1.2 m long.

Applications

• Insulation testing of high- and low-voltage panels and transformers: Checking phase-to-phase and phase-to-ground insulation resistance with HIOKI insulation testers.
• Solar PV plant and inverter acceptance: Quick spot checks of high-voltage insulation resistance on PV arrays.
• Preventive maintenance of motors and electromechanical equipment: Winding-to-ground insulation tests to rule out leakage hazards.