Why Choose the Wöhner 33731 QUADRON 185Power Fuse Disconnector?
The Wöhner 33731, manufacturer part number 33731 000A, is a heavy-duty QUADRON 185Power double in-line fuse disconnector designed for high-current electrical distribution systems. Rated at 1250 A, this three-pole switchable unit provides reliable isolation and fuse protection for industrial switchboards, power distribution panels and low-voltage busbar installations.
Designed for the Wöhner 185Power system, the 33731 combines two vertically arranged NH size 3 fuse positions with robust switching and connection technology. Its double-width construction supports demanding power distribution applications where high current capacity, dependable circuit isolation and efficient use of panel space are essential.
The unit features an M12 screw connection, bottom connection arrangement and an included terminal compartment cover. It is suitable for busbars measuring 30, 40, 60, 80, 100 or 120 mm wide by 10 mm thick. Self-closing inspection holes support convenient testing, while the cover can be locked in the closed position to help prevent unauthorised access.
Key Advantages
- Heavy-duty 1250 A double in-line fuse disconnector for high-current distribution systems.
- Three-pole simultaneous switching provides controlled isolation of all three phases.
- Designed for the modular Wöhner 185Power busbar system.
- Compatible with NH size 3 fuse links manufactured to IEC / HD 60269-2.
- Included terminal compartment cover improves protection around the connection area.
- Self-closing inspection holes allow convenient electrical testing.
- Lockable closed cover helps prevent unauthorised operation or access.
- Integrated current transformers can be installed for power monitoring applications.
Key Features
- Wöhner QUADRON 185Power series.
- 1250 A IEC rated current.
- 800 V AC rated operational voltage.
- 1000 V AC rated insulation voltage.
- 8 kV rated impulse withstand voltage.
- Three-pole switchable operating mechanism.
- Designed for NH size 3 gG fuse links.
- M12 screw terminals with a recommended tightening torque of 24 to 36 Nm.
- Bottom connection configuration for structured switchboard installation.
- IP20 front protection and IP10 protection when open.
- Halogen-free construction.
- Terminal compartment cover supplied as standard.
Reliable Protection for High-Current Power Distribution
Fuse disconnectors combine circuit isolation with the short-circuit and overload protection provided by replaceable fuse links. The Wöhner 33731 enables all three phases to be disconnected together, providing a clear and controlled means of isolating downstream equipment during inspection, maintenance or fuse replacement.
Its 185 mm busbar mounting format makes the device suitable for compact, modular power distribution assemblies. The high 1250 A current rating supports substantial industrial loads, while the included terminal cover, lockable design and inspection openings assist with safe installation and routine servicing.
Typical Applications
- Main low-voltage power distribution boards.
- Industrial switchgear and switchboard assemblies.
- High-current feeder and outgoing circuit protection.
- Manufacturing and process automation facilities.
- Commercial building power distribution systems.
- Data centre and infrastructure distribution panels.
- Motor control centres and machinery power systems.
- Renewable energy and energy-storage installations.
