Disconnector Switches Load Break | 160A-800A | AC-23A & DC-21B | Panel Mount DIN Rail

Fuse-Switch Combination Main Incoming Unit

A factory main switchboard or photovoltaic system uses a UKP or UKGD disconnector switch as the incoming device, with upstream protection providing overcurrent and short-circuit protection. The disconnector switch provides local isolation and operational switching: plant electricians can isolate the switchboard for maintenance by switching the device to OFF and padlocking the handle. The AC-23A rating for AC or DC-21B rating for DC allows the switch to break full loads during controlled shutdowns. The visible isolation gap provides positive confirmation before work begins.

Dual-Supply Bus-Coupler Application

A dual-supply switchboard uses a UKP disconnector switch as the bus-coupler between busbar sections. During normal operation, the bus-coupler is open, and each supply feeds its own section. If one supply fails, the affected incomer is opened, the bus-coupler is closed, and the load is supplied from the remaining source. The AC-23A rating ensures safe closing onto busbars where motors and transformers draw inrush currents. Door interlocks and padlocks allow maintenance teams to lock the bus-coupler securely.

Motor Control Center Incoming Disconnector

A motor control center serving a production line uses a UKP disconnector switch as the main incoming device, with upstream fuses providing overcurrent protection. The disconnector provides single-point isolation for the entire MCC, allowing safe de-energization for maintenance. Auxiliary contacts signal the PLC that the supply has been disconnected, preventing motor starters from attempting to close. The AC-23A rating ensures reliable switching without contact welding.

Capacitor Bank Switching Application

Power factor correction capacitor banks use UKP disconnector switches as incoming devices, with AC-23A ratings covering capacitive load switching requirements. Spring-assisted quick-make mechanisms ensure contacts close at full speed through the pre-arcing region, minimizing contact erosion from capacitive inrush currents.

Generator Incomer and Photovoltaic DC Isolation

Standby generator installations and photovoltaic systems use UKP AC or UKGD DC disconnector switches to provide reliable isolation during maintenance and operational switching for system testing. The UKGD series is specifically engineered for photovoltaic applications up to 1500V DC in compliance with UL98B standards. These switches provide visual contact technology and robust mechanical performance to ensure safety before supply restoration or system servicing.

Integrate Disconnector Switches into Your Switchboard

• Application Engineering: Our switchboard engineers specify the UKP and UKGD rating, configuration, and mounting for your single-line diagram.
• Type-Test Package: Obtain complete test documentation for your switchboard IEC 61439 verification.
• OEM Supply: Source UKP and UKGD switches pre-assembled with handles, interlocks, and auxiliary contacts for your switchboard production line.