Counter Weight Gravity Limit Switch

Gravity Limit Switch for Industrial Cranes & Hoists Machinery.

Reliably Prevent Over Hoisting with Anand Limit Switches.

Sheet Metal & Aluminium Die Cast Enclosures available.

Gravity Limit Switch

ANAND Gravity Limit Switches are designed from the ground up for harsh Industrial Use.

Many Different models are available

CWLS/1/SH/1   1 way,Contacts-1no
CWLS/1/SH/2 1 way,Contacts-2nos
Die Cast Gravity Limit Switch Assembly

Working principle of Counter weight limit switch

At the center of the lever a Shaft is present with attached Coaxial cams .The lever shaft and cams , all rotate simultaneously at the same angle.
These cams are responsible for changing the state of electrical contacts position, placed inside the limit switch enclosure. Electrical Output wire is fed to crane control panel.

The suspended weight is directly connected to the hoist wire rope (as shown in Above Animation ) at the predetermined point where it prevents the hoist from reaching the upper block and rope drum.

Suspended weight is a little heavier than the counter weight ,so due to gravity effect suspended weight wire become stiff and it makes counter weight lift upward.During normal operation the limit switch normally remains closed.A gravity limit Switch will not have a spring return mechanism .

Gravity limit switch operates when the hoist reaches its predetermined point. In this condition the suspended weight rests on the surface of the hoist and suspended weight wire sags and counter weight changes the position and electrical contactor cut off power to stop the hoist motor.

Gravity limit switches can be used parallelly with rotary limit switch in a vertical type motion such as hoisting .

If the rotary limit switch fails to activate at the correct number of turns, the gravity limit switch will be operated to provide an emergency stop .

Die Cast Gravity Limit Switch Die Sheet Metal Gravity Limit Switch

Applications of Counter Weight Limit Switch

Counter weight Limit Switches are used whenever you need to prevent over hoisting.

EOT Cranes

Electric Hoists

Gantry Cranes

Goliath Cranes

Mobile Cranes

Tower Cranes

Image Description
Image Description

ANAND FG Rotary Geared Limit Switch Technical Data Specifications

modular busbars
Body Cast Iron / Cast Aluminum main casing with cover
Protection Degree IP54/IP41:Dust ingress and protect against low pressure water jet from any direction.
Cable Entries 2, 3/4" Conduit
Continuous Current 40 Amp
Max No. Contacts 2 [1NO 1NC] 2NO or 2NC
Rated Voltage Insulation 500 VAC.
Thermal Test Current 10Amps
Wire Connection Screw Terminal
Mode of Operation 1 Way Self Resetting