Schneider FUS 800 Safety Switch – 800A Disconnect

The Schneider FUS 800 provides a manual disconnecting means for high-power industrial circuits. This safety switch isolates electrical equipment during maintenance or emergency situations. You can operate the handle from outside an enclosed control panel. The unit handles up to 800 amperes of continuous current.

Electrical Ratings and Performance

The Schneider FUS 800 carries 800 amps without exceeding temperature limits. This safety switch operates at up to 600 volts AC for industrial machinery. Three poles switch all three phases simultaneously. You can open or close this switch under full load conditions.

Physical Dimensions and Weight

This safety switch weighs 8.5 kg for robust mechanical construction. The unit measures 450 mm tall by 250 mm wide. Its depth reaches 160 mm for internal fuse accommodation. You can mount the Schneider FUS 800 vertically on a flat panel or inside an enclosure.

Mechanical Components and Interface

A spring-assisted quick-make/quick-break mechanism ensures positive contact operation. This mechanism includes 28 individual moving and stationary contact parts. The external handle connects through a 300 mm metal linkage rod. You will find three fuse holders accepting Class L or T fuses. A visible blade design confirms open or closed status from a distance.

Energy Storage and Auxiliary Contacts

The Schneider FUS 800 stores no electrical energy internally. Two auxiliary contact blocks provide status feedback to a PLC. Each block contains one normally open and one normally closed contact. These contacts rate at 10 amps at 240 VAC. The main switch does not require any battery or capacitor for operation.

Installation and Wiring Terminals

Each line and load terminal accepts up to 500 MCM copper or aluminum cable. You will find box lugs with captive screws for secure connections. A torque specification of 325 in-lbs applies to all main terminals. The Schneider FUS 800 includes a neutral bar for three-phase four-wire systems. An additional ground lug accepts wire sizes from 6 AWG to 250 MCM.

Safety Features and Operational Use

A padlockable handle accepts up to three 8 mm padlock shackles. This feature locks the switch in the OFF position for worker safety. The cover interlocks prevent opening when the switch remains ON. You can defeat this interlock with a screwdriver for fuse replacement. Transitioning to this switch provides a code-compliant disconnecting means for motors or distribution panels. For best results, install this unit within sight of the equipment it serves.