Fuse Switch-Disconnector 400 A

Wöhner 33202 is a heavy-duty NH2 fuse switch disconnector (Quadron Volbreaker), designed for secure switching and protection of high-current circuits in low-voltage power distribution systems.

Key Features

• Product Type: NH2 Fuse Switch Disconnector (Quadron Volbreaker)

• Number of Poles: 3-pole (panel mounting)

• Rated Operational Voltage:

  • IEC: 690 V AC / 440 V DC

  • UL: 600 V AC

• Rated Current: 400 A (IEC and UL)

• Short-Circuit Strength:

  • With fuses (AC): 50 kA at 690 V

  • UL SCCR: 100 kA at 600 V

• Rated Isolation Voltage:

  • AC: 800 V

  • DC: 500 V (max. permitted DC voltage: 800 V for use as isolator only)

• Utilisation Categories:

  • AC: AC-23B (400 V), AC-22B (690 V), AC-21B (690 V), AC-20B (1000 V)

  • DC: DC-22B (440 V), DC-21B (440 V), DC-20B (1000 V)

  • Note: Above 690 V AC or 440 V DC, use only as an isolator (not for load switching)

• Fuse Size: For NH fuses size 2 (DIN 43620), up to 34 W permitted power dissipation per fuse

• Terminals: Screw connection, M10 (tightening torque 30–35 Nm)

• Mounting: Panel mounting (mounting plate), screw fastened

• Dimensions (WxHxD): 210 × 288 × 128 mm

• Weight: 3.62 kg per unit

• Protection:

  • Front: IP30

  • Terminal area: Depends on installation

• Safety Features:

  • Arc chambers for safe disconnection

  • Two-piece shock protection for safe conductor connection

  • Self-closing inspection holes in the cover

• Standards: IEC 60947-1:2020, IEC 60947-3:2020 (AC ratings), UL 4248-1

• Approvals: IEC (CB), UL, CCC, DNV GL