Anti Two Block Limit switch for crawler crane overload protection

GJ-type Limit Switch (hook limit switch) is used for lifting wire rope anti-volume limit an electrical automatic protection switch. It is an appropriate weight of the hammer supporting the use of hook up and down movement to hold up or disconnect or turn-on switch, put down the hammer to achieve the purpose of automatically cut off the hoist power supply connected braking system to limit rope over volume, and reach hook in the purpose of a certain height within the lift.

GJ-1 :to reach the peak normally open ( hook across the boom, loop disconnect)
GJ-3: to reach the peak normally closed (hook met crane, closed loop)

1, applies to DC and AC voltage 12 ~ 380V; Rated current: 5A.
2, rated current: 10A
3, supporting the external hammer weight: ≥ 1.7kg

 Case 1  

Case 2 

Weite Technologies Co.,Ltd

Founded in 2002, it is national hi-tech enterprise located in Yichang, China. It has been focusing on R&D and OEM manufacturing of lifting safety protection devices such as Load Moment Indicator, Safe monitoring systems, overload limiter, Load cell, Anemometers etc.We continuously concentrate on ensuring lifting equipments run safely as long-term pursuing goal. 

"The trusted Safety Partner for Global Top 100 Crane Owning Companies like Tat Hong, Asiagroup, Big Crane and Fortune 500 corps" . Nowadays, WTAU products are widely used in marine industry,electrical, chemical, steel, metallurgy, construction, ports and other industries, and have been wide spreaded to over 30 countries and regions.

1) Is your company well-reputated? How to prove that?

It is a China Top 3 brand focusing on Crane Safety Protection Equipment. We are also Safety Partners for Global Top 100 Crane Owning Companies like Tat Hong(top 9), Asiagroup(top 45), Big Crane(top 94) and Top 500 companies such as ABB, Macgragor,TTS,CNOOC,etc. Products are been sold to over 30 countries and regions globally. 

2) How to assure the quality?

The Product Warranty for the total item is 12 months. Any problem after installation, we will change the new one for free.

3) How to install ?

English User Manual(include all the details of each item) will be offered for installation and trouble shooting(refer to the pic below). Also free Remote Instant Technical assistance would be offered by our english engineers. Or we can send our engineers to assist you locally.