
Insulation Tester
S431
Diagnostic Insulation Tester
Meet the S431, a high-end 10kV insulation resistance tester engineered for precise testing and maintenance of high-voltage electrical systems. Equipped with advanced features such as insulation resistance testing, step voltage testing, and PI & DAR measurement, the S431 delivers accurate results in harsh industrial environments, ensuring optimal performance of critical assets like power cables, transformers, switchgears, and generators. With a CAT IV safety rating, this device is designed to provide safe and reliable measurements, even in the most demanding applications, making it an essential tool for electrical professionals.


Key features
- Advanced Protection: • Automated discharge function for safety • 5mA short circuit current limitation • Noise filtering/rejection for accurate readings in electrically noisy environments
- User-Friendly Operation: • Data save functionality for test records • Continuously recording with laptop • Hold function for convenient reading
- Durable Construction: Shock-resistant and weatherproof design with protective lid, ensuring reliability in harsh industrial conditions and field testing scenarios.
- Superior Measurement Range: Exceptional testing capability from 0.01MΩ to 20.00TΩ with 0.01MΩ resolution, offering precise measurements across a wide spectrum of insulation conditions.
- Versatile Test Voltage Selection: Adjustable test voltages in 10V steps from 50V to 1,000V and in 25V steps from 1,000V to 10,000V, plus preset voltages of 250V, 500V, 1,000V, 2,500V, 5,000V, and 10,000V.
Applications
- Power Generation, T&D: Testing insulation of generators, transformers, and switchgear. Installation, Acceptance, and Maintenance testing of HV & MV cables and other power assets
- Industrial Equipment: Preventive maintenance of motors, pumps, and control systems
- Renewable Energy: Testing of wind turbine and solar farm components
- Oil & Gas, Metallurgy sector: Insulation verification of electrical equipment in the industry
- Railways: Testing of traction motors and power distribution equipment
Advantages
- Extended measurement range ideal for high-voltage equipment testing
- Multiple diagnostic tests in a single instrument for comprehensive insulation health assessment
- Adjustable test voltages for precise application-specific testing
- Robust construction suitable for field and industrial environments
- Advanced noise filtering for reliable measurements in electrically noisy environments
- User-friendly operation with data storage capabilities
- Safety-focused design with automatic discharge and current limitation
Technical Specifications:
- Insulation Resistance Range: 0.01MΩ to 20.00TΩ
- Voltage Output: Up to 10kV
- Resolution: 0.01MΩ
- Test Current: 5mA short circuit current
- Capacitance Range: 0.010μF to 100μF
- Current Measurement: 0.01nA to 1000.0μA
- Power Supply: Rechargeable battery system
- Protection Rating: Shockproof and weatherproof design with CAT IV certificate