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Lever Limit Switch

Lever Limit Switch
Lever Limit Switch
Product Code : 17
Product Specification

Since 1998, we are a renowned name in the market as a manufacturer and exporter of Lever Limit Switch. These products are made using the best quality materials and duly checked by our team of qualified professionals to ensure zero defect. Our products are extensively used in E.O.T. Cranes and wagon shunting devices in order to avoid over travelling on power and control circuit. These products are available in various enclosures to meet the requirements of our clients. With the help of our skilled C&F agents, we are capable of delivering Lever Limit Switch in the given time frame.

Specifications:

  • Current capacity(maximum) : 40 Amps AC
  • Body Material : Steel Sheet
  • Voltage : 500 Volts
  • Degree of protection : IP-41

Additional Information:

Lever Limit Switch are used for heavy duty E.O.T. Cranes, Wagon shunting devices etc., to prevent over travelling or over traversing on power and control circuit up to 500 volts A.C. 50 cycles / second and 40 amps current rating.

The Crane Control Equipments make Lever Limit Switch normally remains closed and cuts off power to stop the motor of the particulars motion.

The lever Limit switch operates when its lever reaches its pre-determined position and the lever is moved over a projecting member fixed on the Girder.

The Limit Switch contacts are automatically reset when the lever returns to zero position due to spring action.

The Lever Limit Switch is made in IP-41 as well as in IP-54 enclosure.

In case of IP 41 enclosure the housing is made from suitably reinforced sheet steel where as in case of IP-54, the cover is of Cast Aluminum. Also in this case the base and cover have machined surface to protect the Limit Switch against dust.

The cam shaft on which the cams are fitted is mounted in the housing on moulded bushes of synthetic material which are fixed to the front and rear walls by means of screws.

The Cams which are fitted on the cam shaft are moulded from the highest quality synthetic material and are accurately cut to correspond to the switching sequence desired.

The contacts have a maximum continuous Current capacity of 40 amps AC.

The contact tips are made of high grade Silver Cadmium Oxide alloy.

When used for Series operation[ up to 40 Amps maximum], the Contacts are suitable for 720 operations per hour and in case of Shunt operation [ for Control Circuit ] , the Contacts are suitable for 1200 operation per hour.


The same Contacts can be used in Series as well as in Shunt configurations

The switching capacity of the Contacts when used for Shunt operation is 15 amps at 400 Volts, AC on highly inductive load and 2.5 amps at 220 Volts DC .

These switching capacities in fact are far in excess of what is actually required in practise and hence replacement of Contacts for Shunt may not be necessary for a long time.

The body of the Contacts is made of high grade Melamine which is specifically suited for heavy duty operation .The material is non – tracking and is capable of with standing heavy arcing.

INTRODUCTION

Lever ( and weight operated ) typed Limit Switch LL/CWLS operated the control change-over Contacts of motor of an moving equipment when a Cam moving with loads actuates the Lever of limit switch. This turns the cams on a square shaft and operates the NO / NC contacts elements.

Operation

Two or more Contact Elements are operated by respective rotating Cams, which are suitably fixed on a square Cam Shaft turned by a lever or wight. The contacts operate at 14o from central neutral position.

Design

The Sheet Steel body, Lever and Cover of the Limit Switch are finished by powder coating treatment. The Cam Shaft is mounted in the housing on moulded Nylon bushes ( bearing ) and are fixed

Technical Data


Body Material

Powder Coated Sheet

Degree of Protection

IP-41

Mounting Position

Floor Mounting

Cable Entries

Twin. 3/4 BS conduit

No. of contact

2 / 3 / or 4

Wire Connection

Silver-cadmimum

Rated Voltage

500 V ac

Thermal Test Current

10A


 



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