Crane Motors By Delta Electricals

Crane Motors Range: HP : 0.25hp / 0.18kw To 25 hp / 18.2 kw Frame : 63 To 160L RPM : 1500, 1000, 750 Insulation Class : B, E, F Duty : S3S4 Enclosure : TEFC / TESC Protection : IP54, IP55 Note:Motors with other voltage & frequency and higher ambient temperatures (> 40 0C) and suited for wider power supply variations can also be given. Construction:A Brake Motor is an integral combination of an A.C.induction motor and a D.C.disc type, fail safe, electromagnetic brake unit.These motors are either foot, flange or face Mounted or combination of any two. Dimensions are of squirrel cage types are as per IS:1231 (for foot mounting), IS:2223 (for flange mounting), IS: 2253 (For Face Mounting) and enclosure is either totally enclosed fan cooled (TEFC) or Totally enclosed surface cool (TESC) with degree of protection IP54, IP55 as per IS : 4691. It consists of the following: A.C. Sq. Cage Induction Motor. Encapsulated brake coil housed on the non-driving end Endshield. Brake liner mounted on the armature disc. Operation:Under no power condition Brake springs keep the Brake liner which is made out of cork material, pressed against stationery disc of the Brake. This brake liners are mounted on a disc engaged with multi-teeth gear pinion, mounted on the shaft, thereby prevents rotor shaft rotation.When power is switched on,the brake coil gets energized through D.C. rectifier.It instantly attracts armature disc by overcoming the spring force. This action results in releasing of the brake allowing the rotor to rotate freely.When power fails or when it is switched off , the Brake coil gets de-energised.This results in the spring pressing the brake liner against stationery disc of the brake resulting almost instantaneous braking of rotor. Fail safe condition is thus ensured. Special Features: Being simple and rugged-in construction, these motors need very little maintenance. In the rare event of failure, repair is simple and easy. No separate supply is necessary for brake coil energisation, because the brake coils are working on 180Volts D.C. through rectifier unit. Rectifier  unit  is working on  415 or 230 Volt A.C.  Special brake liner is used, Which ensures that, the braking torque Value remains quite stable throughout the use. Compensation for liner wear is easily done by adjusting the gap between liner and coil plate. The design of brake motor facilitates a very easy replacement of armature disc and brake liner assembly. In case of immergency manual release handle is provided at the  rear side of the brake so that material can be unloaded in case of power failure. For crane and hoist duty applications Brake Motors are offered with special rotors.These rotors are specially suited for S3 and S4 duty normally encountered in hoist and crane applications.   Applications:Brake Motors are used for numerous applications. A few of them are listed below: Textile Machinery Machine Tools Printing Machines Cranes and hoists Material Handling Equipments Leather Processing Machines Cable Reeling Drums Lifts & Rolling Mills Paper Industry Sluices & Valve Operation