Description
Hioki Clamp On Leak Sensor 9657-10 for Reliable Leak Current Testing
The Hioki Clamp On Leak Sensor 9657-10 is engineered to provide dependable measurement of AC leak currents while also supporting load current testing. This dual capability makes it a practical solution for technicians who need flexibility during inspections without switching sensors. Whether used for routine maintenance or detailed troubleshooting, the sensor delivers consistent and repeatable results.
Insulation Fault Detection
At the heart of the Clamp On Leak Sensor 9657-10 is a high-permeability magnetic core combined with an optimized magnetic shield. This design significantly improves sensitivity to weak currents, allowing early detection of insulation deterioration. With an amplitude accuracy of ±1.0 percent at power line frequencies, the sensor provides the confidence required for safety inspections and preventive maintenance programs.
Leak and Load Current Measurement
Unlike sensors dedicated only to leak current, this model also supports load current measurement up to 30 A continuous input. This capability enables technicians to evaluate normal operating conditions and abnormal leakage using a single sensor. The voltage output of 100 mV per ampere allows easy connection to compatible power quality analyzers, loggers, and recording instruments with voltage input.
Field Applications
The clamp accommodates insulated conductors with a core diameter of 40 mm, making it suitable for use in distribution panels, control cabinets, and industrial equipment. Its robust construction and three-meter cable length provide flexibility in confined spaces while maintaining a safe distance from live components during testing.
Preventive Electrical Maintenance
By accurately capturing leak currents across a frequency range of up to 5 kHz, the Clamp On Leak Sensor 9657-10 supports deeper analysis beyond standard 50 Hz and 60 Hz checks. This helps maintenance teams identify abnormal conditions early, reduce unexpected downtime, and improve overall electrical system safety.
Technical Specifications Table
| Specification | Details |
| Product Name | Clamp On Leak Sensor 9657-10 |
| Measurement Type | AC leak current and load current |
| Rated Primary Current | 10 A AC |
| Max Allowable Input | 30 A continuous |
| Output Signal | AC 100 mV per ampere |
| Amplitude Accuracy | ±1.0 percent rdg ±0.05 percent f.s. |
| Phase Accuracy | ±3 degrees at 50 Hz or 60 Hz |
| Frequency Range | 40 Hz to 5 kHz |
| Measurable Conductor | Insulated conductor |
| Core Diameter | 40 mm |
| Instrument Compatibility | Power quality analyzers with voltage input |
| Dimensions | 74 mm W × 145 mm H × 42 mm D |
| Weight | 380 g |
| Cable Length | 3 m |
| Included Accessories | Instruction manual |
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