Mersen STPT2-40K1000V-YPV Type 2 PV Surge Protection Device 3P 10kA 1.06kV DC

The Mersen STPT2-40K1000V-YPV is a high-performance Type 2 surge protection device engineered specifically for the rigorous demands of photovoltaic systems. This 3-pole device is designed to safeguard sensitive solar power equipment by diverting transient overvoltages to the ground, thereby preventing damage to critical components such as inverters and solar panels. With a robust construction and precise engineering, it ensures the continuous and reliable operation of DC power installations.

Advantages

This surge protection device offers exceptional reliability in protecting solar energy systems from electrical surges caused by atmospheric discharges or switching operations. Its Type 2 classification makes it ideal for secondary protection, effectively limiting voltage spikes to levels that connected equipment can withstand. The compact 3-pole design allows for efficient integration into existing electrical cabinets, while its high discharge capacity ensures long-term durability even in demanding environmental conditions. By maintaining system integrity, it significantly reduces the risk of downtime and costly repairs for photovoltaic arrays.

Suitable for

• Photovoltaic power generation systems
• Solar inverter protection
• DC power distribution boards
• Residential and commercial solar installations

When it may not be suitable

This device is specifically designed for DC photovoltaic applications and should not be used in AC power circuits. It is intended for Type 2 surge protection and may not provide sufficient protection in areas with extremely high lightning strike frequency where Type 1 protection is required.

Key specifications

• Type: 2
• Poles: 3
• Nominal discharge current: 10kA
• Maximum operating voltage: 1.06kV DC

How to use

The device should be installed by a qualified professional in accordance with local electrical regulations. It is typically mounted on a standard DIN rail within the solar distribution box. Ensure that the connections are secure and that the wiring matches the polarity requirements of the photovoltaic system. The device should be connected in parallel with the DC circuit to be protected, ensuring that the grounding connection is robust and has the lowest possible impedance.

What to consider before purchase

• Verify that the maximum operating voltage of your PV string does not exceed 1.06kV DC.
• Ensure there is sufficient space on the DIN rail within your distribution enclosure.
• Confirm that the system requires a 3-pole configuration for your specific installation layout.

Usage recommendations

Regularly inspect the status indicator on the device to ensure it is functioning correctly. If the indicator shows that the protection module has reached the end of its service life, it must be replaced immediately to maintain system safety.