Model Code Definition

Structural Features

● For this series isolators: models rated at 200A & 400A adopt single-blade contact structure, while 600A~1500A adopt double-blade design. Leaf springs are mounted on both sides of each blade to generate required contact pressure. All contacts and blades are tin-plated to improve surface protection and reduce contact resistance.

● Equipped with central insulated cover operating handle to prevent operators from accidental contact with live parts during operation.

● Built-in locking latch mechanism: the latch securely holds the isolator in closed position against unintended opening even under short-duration surge current; unlocking is mandatory before any opening operation to avoid false tripping.

● LX19B limit switch is fitted on the isolator mounting base; its contact status is controlled by open/closed position of the insulating cover. Mechanically, the normally closed contact of the limit switch opens prior to main contact separation and closes after main contact reclosure. When wired to the coil circuit of contactors or moulded case circuit breakers, interlock control for isolator switching can be realized.

Main Technical Specifications

Overall & Mounting Dimensions

HD11FA-□□/38□ Series (Front Wiring Type)

HD11FA-□□/39□ Series (Rear Wiring Type)