Crane Power Circuit Limit Switches

Prod Model:	LX-33

Product Description

Crane Power Circuit Limit Switches are mounted on a crane trolley to prevent over travel of the crane hook when hoisting. These enclosed switches are available as single and duplex types from 50-500 hp. Power Circuit Limit Switches utilize double pole - double-throw power circuit contacts to disconnect the main power to the hoist motor. On dc applications, a resistor is required with the limit switch to provide dynamic braking.

Features
 
  • NEMA 3R weather-resistant enclosure with U-shaped cover allows for easy access to mechanism.
  • Moving and stationary contacts are common to C80 mill duty DC contactors eliminating additional      spares.
 
Options
 
  • Auxiliary contact
 
Control Limit Track Type Control
 
Control limit tack type switches operate at 600 V maximum, ac or dc. Types of operators for these switches are Roller lever - 460 FPM, Standard fork lever - 700 FPM, Heavy-duty fork lever - 340 FPM, and counter weight with reset for over-hoist applications. Standard spring return switches operate in one direction only (contacts change state when lever is moved in one direction from center).
 
Features
 
  • Spring return operation, maintained operation, or contact configuration can easily be field converted  minimizing down time and inventory requirements.
  • Double shaft extension provides flexibility of mounting operating lever on either side of switch.
 
Options
 
  • Operation of spring return contacts in either direction