The HT Instruments PV-ISOTEST is a specialized insulation tester designed specifically for photovoltaic (PV) systems. It’s used to ensure the safety and proper functioning of solar installations by assessing the insulation integrity of PV modules, strings, and entire arrays.
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Key Features and Benefits:
Key Considerations:
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Applications:
- Commissioning of PV Systems: Used to verify the insulation integrity of new solar installations.
- Maintenance of PV Systems: Helps identify and locate insulation faults in existing systems to prevent performance issues and safety hazards.
- Troubleshooting PV Systems: Assists in diagnosing insulation-related problems in solar installations.
Key Features and Benefits:
- Insulation Testing up to 1500V DC: It can perform insulation resistance measurements on PV systems with voltages up to 1500V DC, which is crucial for modern high-voltage solar installations.
- Ground Fault Locator (GFL) Function: A unique feature that helps pinpoint the location of insulation faults in a PV string, saving time and effort in troubleshooting.
- Dual Mode Insulation Testing: Offers two modes for insulation testing:
- Verification Mode: Provides a quick pass/fail assessment of insulation resistance.
- Identification Mode: Identifies the insulation resistance of both positive and negative poles, helping to locate the actual fault.
- Timer Mode for Cable Testing: Allows for testing the insulation of cables, including calculating the Dielectric Absorption Ratio (DAR) and Polarization Index (PI) to assess insulation condition.
Continuity Testing: Performs continuity testing of protective conductors with a test current greater than 200mA.
- Voltage Measurement: Measures DC and AC voltages in the PV system.
- No External Devices Needed: Unlike traditional insulation testers, the PV-ISOTEST doesn’t require external devices to short-circuit the PV string during testing, simplifying the process.
- Compliance with Standards: Meets relevant safety and testing standards for PV systems, including IEC/EN62446-1.
Key Considerations:
- Safety: Working with high-voltage PV systems requires proper training and adherence to safety protocols. Always consult relevant safety guidelines and ensure you understand the risks involved.
- Calibration: Regular calibration is essential to maintain the accuracy of the tester. Check with HT Instruments or a qualified calibration service provider for recommended intervals.
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