Insulation Testers
Insulation resistance testing is one of the most fundamental preventive maintenance checks on electrical equipment. A drop in insulation resistance gives early warning of moisture ingress, contamination, ageing, and physical damage. Green Watt supplies a range of insulation testers covering standard electrical equipment, solar PV systems, and high-resistance applications.
Key Features
- Test voltages: 250 V, 500 V, 1000 V, 2500 V, 5000 V (model dependent)
- Measurement range: up to 10 TΩ
- PI (Polarisation Index) and DAR automatic calculation
- Step voltage and ramp voltage test modes
- Solar PV bipolar insulation measurement without disconnecting arrays
- Temperature-compensated readings (PV models)
- Auto-discharge circuit after testing — safe for operators
- Data logging with USB download and CAT IV safety rating
Applications
- ›Motor and generator winding insulation assessment
- ›Power cable and cable joint insulation testing
- ›Transformer winding insulation before energisation
- ›Solar PV system commissioning per IEC 62446
- ›Switchgear and busbar insulation checks
Technical Specifications
| Test Voltages | 250 V to 5000 V DC |
| Measurement Range | Up to 10 TΩ |
| PV Test Voltage | Up to 1500 V DC (PV models) |
| Safety Rating | CAT IV |
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