Hirschmann 011 A2B

$255.00

Weight 3 lbs
Dimensions 10 x 10 x 4 in

Hirschmann Part # 031-002-060-011

Grove Manitowoc Part # 9333102230

Description

The iSENS HES anti-two block switch by Hirschmann is the most common A2B switch used by the leading Crane and Equipment manufacturers worldwide.  The A2B switch assists in preventing equipment damage due to the hook block contacting the boom tip on cranes and other lifting equipment. The electrical switch element is completely sealed in the housing. The housing is made of a corrosion-proof, light metal alloy and is treated and coated making it resistant to the damaging effects of the environment.

  • Anti-two block switch for winches, lifting • devices, and cranes
  • Accepted as an emergency limit switch • by BIA (professional association for safety standards at work), acceptance test no. A. BIA 964031
  • Fully sealed electrical unit
  • stainless steel traction rope with a tensile strength of ≥5kN
  • funnel-shaped introduction of the actuating rope with low friction surface for safe rope guidance

Hirschmann Standard Anti Two Block Switch DS150, DS350, DS160, iFlex  LMI System.

Hirschmann Standard Anti Two Block Switch for all Hirschmann wired systems.

  • Approved as an emergency limit switch by the Trade Cooperative Institute for Work Safety (BIA)
  • high quality diecast housing, additional surface coating
  • fully cast electrical function unit
  • integrated line monitoring
  • stainless steel traction rope with a tensile strength of ≥5kN
  • funnel-shaped introduction of the actuating rope with low friction surface for safe rope guidance.

PAT Hirschmann Anti Two Block warning systems are used on cranes to halt or caution the operator of unsafe upward movement of the hook. Without anti-two block protection, operators can pull the hook and load through the crane body, damaging the crane or causing safety risks. Essentially, anti-two block systems prevent events caused by unintentional contact between the hook block (ball) and the boom point, often referred to as two-blocking. One type of two- blocking, often described as “booming down into the block,” occurs on cranes because of the location of the hoist drum, which is typically mounted on the revolving superstructure. Through this arrangement, the distance between the hoist drum and the boom tip sheaves increases as the boom is lowered, causing the lower block (hook block) to move closer to the upper block (boom tip sheaves). Sensing and Control An anti-two block system consists of a sliding weight, which hangs on a switch. If the crane’s hook travels too far upward, it pushes up the weight and releases tension on the switch. This ‘change of state’ issues a warning and/or stops the upward movement. Not only is crane operation with an anti-two blocking system safer, it is required by OSHA on cranes dated 1992 or newer, that have previously had an anti-two block system, or are used to lift personnel.

Reviews

There are no reviews yet.

Be the first to review “Hirschmann 011 A2B”

Your email address will not be published. Required fields are marked *