24kV Four Position Oil Loadbreak Switch 1P MBB

The 24kV Four Position Oil Loadbreak Switch (1P MBB) is a specialized medium-voltage switching device designed for oil-filled distribution transformers requiring high operational safety and flexible circuit control. The unit integrates a four-position switching mechanism with a 1-pole make-before-break (MBB) structure, enabling controlled transfer between circuits without power interruption risk.

This design is widely used in modern transformer systems where continuity, safety, and compact internal configuration are essential.

Features

Four Position Functional Control

The switch provides multiple operating states for transformer operation and maintenance:

• Line connection
• Load switching
• Isolation state
• Grounding or test mode

Cutting-Edge Technology For 1P MBB (Make-Before-Break)

• Ensures continuous current transfer during switching
• Prevents momentary open-circuit conditions
• Improves system stability during load transition
• Reduces electrical stress on transformer windings

Designed and developed by Wenzhou Best engineer team, features a semi-circular structure for the moving contact component, including the contact plate and the connecting block. The end of the contact plate is embedded within the connecting block. During installation, only a hole needs to be drilled in the middle of the connecting block, and then the switch shaft can be inserted into the connecting block to achieve the fixation of the switch shaft and the moving contact component. At this point, no additional positioning pins, fixing bolts, or other connecting components are required, resulting in low installation accuracy and simple processing technology. Moreover, the overall integrity of the load switch after assembly is excellent, with high working stability and long mechanical life.