HINDUSTAN ELECTRIC MOTORS
Featured Products
Highest quality standards are achieved through the implementations of latest technology, decades of experience and everlasting moral values , which have helped us to retain our customers as well as multiply them.
Welcome to HINDUSTAN ELECTRIC MOTORS
Brake Motors
Construction:
Brake Motors are used for various applications where instantaneous stopping of the driven load is required. The operation of the brake is “FAIL SAFE TYPE” i.e. normally ON. When the electrical power to the motor is cut–off or the power fails, the brake is applied.
Brake motor is a combination of an A.C. induction motor and an electromagnetic AC or DC brake. The electromagnetic brake is mounted on the non–driving end of the motor.
DC brake motors are provided with a rectifier which provides the required DC voltage to the brake coil which in turn operates the brake. The supply to the rectifier is fed from any two terminals (between any two phases) in the main terminal box of the motor.
General applications of Brake motors are printing machinery, textile machinery, rolling mills, cranes & hoists, material handling equipments, machine tools etc.
Working:
When the power to the motor is switched off, a braking torque is generated which presses the armature plate of the brake against the mounting flange. When the supply resumes, a magnetic field is produced in the brake coil and this pulls the armature plate against the spring force and the shaft is now free to rotate.
Range of Hindustan Brand Brake Motors:
KW : 0.18 to 55.0 kW
Pole : 2P, 4P, 6P & 8P
Mounting : B3, B5, B14 & combinations
Frame : 63 to 250MX
Motor Voltage : 415V±10% or as required
Frequency : 50Hz±5% or as required
Braking torque : Up to 800Nm
Brake coil voltage : 190V DC (Other voltages on request)
Protection : IP54
Duty cycle : S1 – S8
SPECIAL FEATURES:
- The brake motors are simple & rugged & so easy for maintenance.
- No separate DC supply is required as the rectifier is provided which gives the required DC voltage for energisation of the brake.
- The rectifier is mounted inside the main terminal box so no separate terminal box required.
General guidelines for selection of suitable Brake Model:
The Brakes are rated by torque & selection of suitable model can be made by calculating the required torque, rating of the brake & then matching it with static torque.
Torque (Nm) = 9550 x (KW / RPM) x Safety Factor (SF)
where kW-Kilowatts of motor,
RPM-Speed of motor,
SF-Safety Factor depending on type of prime mover & load.
For electric motor, SF = 2 to 3
For diesel engine, SF = 4 to 5
For compressor, SF = 5 to 6.
Cooling Tower Motorstandard And Flameproof
INTRODUCTION
Cooling tower motors are specially designed flange mounted motors in totally enclosed construction to suit air conditioning & refrigeration industries. They are provided with special long shaft construction with external threaded end to directly mount the fan blades. This also helps in the better cooling of the motor. Motors are compact in design & less in weight to facilitate easy maintenance. They are available as standard catalogue designs or as custom built.
RANGE
Power : 0.37 to 37.0 kW
Polarity : 4P, 6P, 8P, 10P & 12P
Mounting : B5 flange mounted
Frame size : 71 to 315
Voltage : 415V ± 10% or as required
Frequency : 50Hz ± 5% or as required
Ambient : 45°C.
Altitude : up to 1000m above msl
Enclosure : Totally Enclosed Non Ventilated (TENV) / TEFC
Protection : IP55
Ins. class : Class F with temp. rise limited to class B.
Duty : S1
Crane Duty Motors
INTRODUCTION:
Crane duty motors are specially designed for frequent starts/stops & reversing required in cranes & lifts of all types. They can also be used in applications such as material handling, weirs & sluices, auxiliary motors in rolling mills or wherever intermittent drives are required.
Range:
KW : 0.18 to 200.0 kW
Pole : 4P, 6P & 8P
Mounting : B3, B5, B14 & combinations
Frame : 71 to 315LX
Voltage : 415V ± 10% or as required
Frequency : 50Hz ± 5% or as required
Ambient : 50°C. (Refer Table 1)
Altitude : up to 1000m above msl (Refer Table 2)
Rotor type : Squirrel cage aluminium die cast
Enclosure : Totally enclosed fan cooled (TEFC)
Protection : IP55
Ins. class : Class F with temp. rise limited to class B
Duty cycle : S3, S4 & S5
Standards : IS/IEC 60034-1, IS 325, IS 1231, IS 2223 & IS 4722
| Table 1 | Table 2 | |||
| Ambient temp.
(°C) |
Deration factor
for Power |
Altitude above
msl (m) |
Deration factor
for Power |
|
| 50°C | 1.00 | 1000 | 1.00 | |
| 55°C | 0.96 | 1500 | 0.97 | |
| 60°C | 0.92 | 2000 | 0.94 | |
| 2500 | 0.90 | |||
| 3000 | 0.86 | |||
Construction:
Castings: Crane duty motors’ housings & end shields are made from high quality castings as per IS 210. All components are machined to correct accuracy & alignment.
Stampings: The stampings are made from low loss high permeability steel.
Terminal Box: Standard location of terminal box is on top. However the terminal box on right or left side can be provided on request. The terminal box can be rotated in steps of 90° in each position. Motors up to 250 frames have aluminium boxes whereas frames 280 & 315 are with cast iron terminal boxes as standard. Cast iron terminal boxes up to frames 250 can also be provided on request.
Winding & Protection: All motors are wound with super enameled dual coat copper wires. This enable motors to be used for inverter applications as well. Features like vacuum pressure impregnation (VPI) & PTC thermisters embedded in stator winding can be provided on request.
Earthing terminals: Two earthing terminals are provided, one in the terminal box & other on the motor body.
Anti-condensation Heater: To avoid moisture accumulation inside the motor, the motor windings can be heated by connecting 4-10% of rated voltage to the motor terminals. This will generate enough heat equivalent to 20-25% of rated current. Alternatively any method as described in IS: 900 can be used. Motor can also be offered with space heaters on request for frames 90 & above.
Motors with integral brakes:
These motors can be supplied with integral electromagnetic DC fail safe brakes with built in rectifiers for frames up to frames 250MX.
| Flameproof motors:
“Hindustan” crane duty motors are also available with flameproof enclosures. Enquiry Details: When placing an enquiry, please furnish the following details;
|
Our Vision
* To embrace new technologies and methods. * To give unsurpassed products and services to the clients. * To constantly look for improvement and changes.
