HT PV-ISOTEST: Essential Safety Tester for 1500V PV Systems

The HT PV-ISOTEST is a dedicated safety tester designed for verifying the insulation resistance and protective conductor continuity in photovoltaic installations up to 1500V DC. It meets the requirements of IEC/EN62446 and IEC/EN61557 for insulation and continuity testing, making it a core tool for commissioning and maintenance of solar PV systems.

Comprehensive Insulation Testing

Ensure the integrity of your DC circuits with multiple test modes, as detailed in the product datasheet:

• Test Voltages: Selectable 250V, 500V, 1000V, and 1500V DC to suit various system requirements.
• DUAL Mode: Measures insulation resistance between positive/negative conductors and earth simultaneously.
• TIMER Mode: Performs a timed insulation test (3s to 999s) for specific diagnostic procedures or testing unearthed metal masses.
• High Resistance Range: Measures insulation resistance up to 100 MΩ.

Ground Fault Locator (GFL) Function

A standout feature for efficient troubleshooting:

• Pinpoint Faults: The GFL function helps locate the position of a low insulation fault within a single string (disconnected from the inverter and earth connections).
• Reduces Downtime: By identifying the approximate location of the fault (accuracy ±1 module according to the datasheet), technicians can target repairs more effectively, saving time and reducing system downtime which impacts returns associated with different energy tariffs.
• Conditions: Requires specific test conditions, including Vtest ≥ Vnom and a single fault < 0.23 MΩ, for optimal results.

Continuity of Protective Conductors (RPE)

Verify the effectiveness of your earthing system:

• IEC/EN62446 Compliant: Performs continuity tests with a test current >200mA DC, as required by the standard.
• Wide Range: Measures continuity resistance from 0.00Ω up to 1999Ω.
• Cable Compensation: Although not explicitly stated for this model in the provided datasheet snippet, similar testers often include cable resistance compensation for accurate low-ohm readings (verify in full manual if needed).

Why Evergy Recommends This Product

The PV-ISOTEST is a robust and reliable tester focused on the critical safety aspects of high-voltage PV installations.

• 1500V Capability: Designed for modern, high-voltage solar arrays.
• Essential Safety Tests: Covers the crucial insulation and continuity tests required for compliance and safe operation.
• GFL Fault Location: A significant time-saver for troubleshooting insulation issues, getting systems back online faster.
• Ease of Use: Features a clear graphic display and straightforward operation.

Technical Highlights

Based on the product datasheet:

• Insulation Test Voltages: 250, 500, 1000, 1500V DC
• Insulation Resistance Range: Up to 100 MΩ (Mode dependent)
• Continuity Test Current: >200mA DC (up to 5Ω)
• Continuity Resistance Range: 0.00Ω - 1999Ω
• Safety Category: CAT III 1500V DC / CAT III 1000V AC

Please refer to the datasheet tab for full specifications.

Connectivity

Features an optical/USB port for PC connection, allowing data download (max 999 tests stored) for reporting and analysis, likely using HT software.

Ensure the Safety of Your High-Voltage PV Systems

The HT PV-ISOTEST provides the necessary insulation and continuity verification for 1500V systems, enhanced with the GFL troubleshooting feature. A vital tool for installers and maintenance teams working on large-scale solar projects. Also explore our ranges of solar mounting and solar batteries. Need advice? Contact Evergy.