Surge Protection Device HiSmart NV821723 1P 1000 VDC

Surge Protection Device HiSmart NV821723 is a single-pole (1P) DC surge protector rated for 1000 VDC. It is designed to protect DC power systems, photovoltaic arrays, battery installations and other industrial DC equipment from transient overvoltage caused by induction, nearby lightning strikes or direct lightning influence. The unit meets IEC 61643-1 and CE standards and features a compact housing for DIN-rail mounting.

Advantages

The HiSmart NV821723 provides high discharge capability with a maximum discharge current of 100 kA and a nominal discharge current of 60 kA, ensuring effective diversion of large surge events. Its fast response time (under 25 ns) and a voltage protection level up to 5 kV help limit overvoltage stress on connected equipment. The device supports wide operating temperatures (-40 °C to +85 °C) and simple installation on a 35 mm DIN rail.

Suitable for

• Photovoltaic (PV) arrays and solar inverter DC inputs
• Battery banks and DC distribution systems
• Wind power DC equipment and industrial DC power supplies
• Protection of sensitive DC electronics against transient overvoltage

Key specifications

• Number of poles: 1P
• 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
• Wires cross-section: 4–6 mm²
• Dimensions: 27 × 90 × 67 mm
• Warranty: 24 months

How to use

Install the HiSmart NV821723 on a standard 35 mm DIN rail inside the DC distribution panel. Connect the device in series with the DC line to be protected according to the system wiring diagram and applicable electrical standards. Ensure correct conductor size (4–6 mm²) and secure terminal connections. After installation, verify proper grounding and check that the maximum continuous operating voltage does not exceed 1000 VDC.

Recommendations

For reliable protection, combine the NV821723 with appropriate upstream and downstream protective devices as required by system design, and perform periodic visual inspections. Replace the unit if it shows signs of damage or after a major surge event to maintain continued protection of DC equipment.