Dehn 950530 Type 2 Surge Protection Device for 1000V DC Photovoltaic Systems, 3-Pole, 12.5kA

The Dehn 950530 is a high-performance Type 2 surge protection device engineered specifically for photovoltaic systems operating at a maximum voltage of 1000V DC. This 3-pole surge arrester is designed to safeguard sensitive solar power equipment by effectively diverting transient overvoltages caused by atmospheric discharges or switching operations in the electrical grid. By maintaining a stable voltage environment, this device helps prevent damage to solar inverters and modules, thereby extending the operational lifespan of the entire photovoltaic installation.

Advantages

This surge protection device offers robust protection through its advanced internal circuitry, which is optimized for the unique electrical characteristics of DC solar circuits. Its 3-pole configuration ensures comprehensive coverage for the positive and negative conductors relative to the protective earth, providing a reliable barrier against electrical surges. The compact design allows for efficient installation in standard distribution boards, while the high discharge capacity ensures that the device can handle significant energy surges without compromising the safety of the connected equipment. The integrated status indicator allows for quick visual monitoring of the device's operational health, ensuring that maintenance can be performed proactively.

Suitable for

• Photovoltaic systems with a maximum DC voltage of 1000V
• Protection of solar inverters in residential and commercial installations
• Integration into DC combiner boxes for solar arrays
• Shielding sensitive electronic components in renewable energy setups

When it may not be suitable

This device is not intended for use in AC electrical systems or DC systems exceeding the rated voltage of 1000V. It is also not suitable for environments where the expected surge current exceeds the specified discharge capacity of the device, as this would require a higher-rated protection solution.

Key specifications

• Type: Type 2 surge arrester
• Rated voltage: 1000V DC
• Number of poles: 3
• Discharge capacity: 12.5kA
• Voltage protection level: 4kV

How to use

The device should be installed by a qualified electrician in accordance with local electrical safety regulations. It is typically mounted on a standard DIN rail within the DC distribution or combiner box. Ensure that the connections are secure and that the cross-section of the connecting cables meets the manufacturer's requirements for current-carrying capacity. The device should be connected in parallel with the DC circuit, ensuring that the protective earth connection is established with the lowest possible impedance to maximize the effectiveness of the surge protection.

What to consider before purchase

• Verify the maximum open-circuit voltage of your solar array does not exceed 1000V DC
• Ensure the installation environment is protected from direct moisture and extreme environmental conditions
• Check compatibility with your existing DIN rail mounting system
• Confirm that the discharge capacity meets the risk assessment requirements for your specific location

Usage recommendations

Regularly inspect the visual status indicator on the front of the device to ensure it remains in the operational state. If the indicator shows a fault, the surge protection module should be replaced immediately to maintain the safety of the photovoltaic system.