480 Volt 3 Phase 400 Amp Fused Disconnect Switch

The 480 volt 3 phase 400 amp fused disconnect switch plays a critical role in electrical circuits. By combining the functions of a fuse and a knife switch, it offers both protective capabilities and convenient operation. Thanks to its unique mechanical design and precise operation, the 480 volt 3 phase 400 amp fused disconnect switch has become an indispensable component in modern electrical systems.

1.During normal operation, the disconnect switch controls the connection and disconnection of power, ensuring smooth circuit continuity. When maintenance is required, the fused disconnect switch provides a clear physical disconnection point, safeguarding personnel and equipment.

2.In the event of an overload or short circuit, the fuse element within the switch melts quickly, interrupting the fault current and protecting both the circuit and connected devices from damage.

Product Parameter:

the Front Type

the Aside Type

Product Maintenance:

1.Before being put into normal service, the 480 volt 3 phase 400 amp fused disconnect switch must be mounted in a vertical position and the cover plate should be removed.

2.To ensure proper short circuit breaking capacity and current limiting performance, the 480 volt 3 phase 400 amp fused disconnect switch must be fitted with fuses of the correct rating.

3.When replacing a fuse link, the load circuit must first be disconnected and the disconnect switch cover opened or removed. The fuse can then be released by gently pressing the spring clip beneath the retaining plate. A new fuse is installed by sliding it down along the guide slot into place.

4.Although the arc chamber can be inserted or withdrawn easily from the upper socket, unnecessary removal should be avoided. During installation, it should be handled carefully and inserted slowly until it is fully seated.

5.To keep the contacts of the 480 volt 3 phase 400 amp fused disconnect switch in good condition, regular inspection and cleaning of dust, oil, or other deposits is required. In addition, lubrication should be applied periodically to the moving parts of the operating mechanism to maintain smooth operation and extend service life.