Isolator Switch HiSmart NV821839 32A 1000V DC

The HiSmart NV821839 is a DC isolator switch for manual disconnection and control of photovoltaic (PV) and other DC installations. Rated for up to 1000 V DC and 32 A, the device provides a secure isolation point for maintenance and emergency shutdowns. It features a lockable handle, fast arcing time and a weatherproof enclosure with a breather valve; preinstalled MC4 connections simplify installation. The switch is compliant with IEC/EN 60947-1 & 3, AS/NZS 5033:2014, ASA60947.3 and UL508i standards and is suitable for residential and commercial solar PV systems.

Advantages

Four-pole design supporting DC up to 1000 V and rated current of 32 A ensures reliable isolation. The unit is fire retardant and UV resistant, with IP66NW protection for enhanced weather resistance. A lockable handle permits secure locking in the closed position for safety during operation. Rapid disconnection with arcing time under 3 ms reduces risk during fault conditions. Preinstalled MC4 connectors reduce wiring errors and simplify installation.

Suitable for

• Residential solar PV arrays
• Commercial solar PV installations
• Battery banks and DC energy storage systems
• Other DC electrical circuits requiring a manual isolator

Key specifications

• Number of poles: 4
• Rated voltage (Ue): DC 1000 V
• Insulation voltage (Ui): DC 1500 V
• Rated current (In): 32 A
• Maximum current: 32 A
• Rated impulse voltage (Uimp): 8 kV
• Disconnection (arcing) time: < 3 ms
• Mechanical life: 10,000 cycles
• Electrical life: 3,000 cycles
• Connection type: MC4 (preinstalled)
• Protection class: IP66NW, V0
• Dimensions: 180 x 175 x 110 mm
• Operating temperature: -40°C to 85°C
• Standards: IEC/EN 60947-1 & 3, AS/NZS 5033:2014, ASA60947.3, UL508i

How to use

Install the HiSmart NV821839 in the DC circuit following local electrical codes and the PV system design. Connect the DC conductors to the preinstalled MC4 connectors and secure the unit in a suitable location accessible for manual operation. To isolate the circuit, operate the handle to the open position; the handle can be locked in the closed position for safety during authorized operation or maintenance. Verify isolation with appropriate testing equipment before performing any maintenance.

Recommendations

Use the switch within its rated limits (32 A, 1000 V DC) and ensure regular inspections for enclosure integrity, connector condition and correct operation. Only qualified personnel should install or service the isolator, and all work should comply with relevant standards and local regulations.