Surge Protection Device HiSmart NV821730 2‑pole 1000 VDC

HiSmart NV821730 is a 2-pole surge protection device rated for 1000 V DC designed to protect DC power systems, photovoltaic arrays and wind-generation DC equipment from transient overvoltages caused by switching events, induction lightning and direct lightning influence. The device conforms to IEC 61643-1 and CE standards and is intended for installation on the DC side of inverters, string combiners and other DC circuits to reduce equipment damage and downtime.

Advantages

The NV821730 offers Class B protection with a high maximum discharge current up to 100 kA and a nominal discharge current of 60 kA, a fast response time under 25 ns and a voltage protection level of ≤ 5 kV. It supports continuous operating voltages up to 1000 V DC, is rated for a wide operating temperature range (–40 °C to +85 °C) and is designed for DIN-rail (35 mm) mounting with 4–6 mm² conductor connections. Compliance with IEC 61643-1 and CE provides verified safety and performance criteria.

Suitable for

• Photovoltaic (PV) string combiner boxes and DC arrays
• Inverter DC input protection
• Wind power DC systems and other industrial DC installations
• Commercial and residential solar PV systems

Key specifications

• Poles: 2
• Class: B
• Maximum continuous operating voltage (Uc): 1000 V DC
• Nominal discharge current (In): 60 kA
• Maximum discharge current (Imax): 100 kA
• Voltage protection level (Up): ≤ 5 kV
• Response time: < 25 ns
• Frequency: 50/60 Hz
• Operating temperature: -40 °C to +85 °C
• Relative humidity (at 25 °C): < 95%
• Installation: 35 mm DIN rail
• Wire cross-section: 4–6 mm²
• Dimensions: 54 x 90 x 67 mm
• Standards: IEC 61643-1, CE
• Warranty: 24 months

How to use

Mount the HiSmart NV821730 on a 35 mm DIN rail in the DC section of the PV or DC installation, close to the equipment to be protected (for example, string combiner or inverter DC input). Connect the two poles to the corresponding positive and negative DC conductors using appropriate 4–6 mm² wiring and ensure secure terminations. Verify system voltage does not exceed the 1000 V DC rating before energizing. Observe manufacturer and local electrical codes when performing installation and commissioning.

Recommendations

Install surge protection at the DC source and distribution points; periodically inspect connections and the device after severe surge events. Replace the protector if it shows signs of damage or after rated discharge events beyond nominal specifications.