Hipot & VLF Testers
High-voltage withstand testing verifies the dielectric integrity of cable insulation, transformer windings, switchgear, and other HV apparatus at commissioning and during periodic maintenance. Green Watt supplies AC hipot, DC hipot, and VLF (Very Low Frequency) test systems — offering the right high-voltage testing tool for every application.
Key Features
- AC Hipot: 5 kV to 100 kV AC output for power-frequency withstand testing
- DC Hipot: up to 80 kV DC with ultra-low ripple for leakage current measurement
- VLF: 0.1 Hz test at up to 72 kV for practical testing of long cable circuits
- Tan delta measurement at VLF frequency for cable condition assessment
- Leakage current profile display and step-voltage test mode
- Automatic pass/fail indication with trip threshold setting
- Built-in automatic discharge with residual voltage indicator
- Single-operator portable design for site use without mains power (VLF)
Applications
- ›Factory and site acceptance testing of HV cables and cable systems
- ›Post-repair hipot testing of cable joints and terminations
- ›Transformer and switchgear withstand testing
- ›Pre-commissioning testing of GIS
- ›Periodic dielectric testing of aged cable circuits
Technical Specifications
| AC Hipot Output | 5 kV to 100 kV AC |
| DC Hipot Output | Up to 80 kV DC |
| VLF Output | Up to 72 kV at 0.1 Hz |
| VLF Frequency | 0.1 Hz sinusoidal / cosine-rectangular |
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