Backed by experience and expert team we are offering Crane Duty Motors, available with us in different technical specifications as per the specifications laid down by our clients, we offer this motor in various range and at most reasonable price to our clients.Specification:
- Frame 71- 160
- kW/Hp 0.37 - 15 / 0.5 - 20
- Pole 4-8 pole
- Voltage 415 ± 10% Volts
- Frequency 50 ± 5 % Hz
- Combined ± 10 %
- Ambient temperature 450 C
- Altitude up to 1000 m above mean sea level
- IS: 325 Three phase induction motors specification
- IS: 1231 Dimensions of three phase foot mounted induction motors
- IS: 2223 Dimensions of flange mounted induction motors
- IS: 4722 Rotating electrical machines specification
- IS: 4691 Degree of protection for rotating electrical machines
- IS: 6362 Designation of methods of cooling of rotating electrical machines
Intermittent Duty Application:
The motors are designed for intermittent duty operations and different starts/stops per hour as shown in the rating charts. The frame selections are based considering load GD2 values referred to motor shaft are less than or equal to motor GD2 values. Various intermittent duty types are explained below.
Short Time Duty:
The motor operates at constant load for a given duration which is less than that required to reach thermal equilibrium and is followed by a rest or de-energized period such that the motor cools down to close to ambient temperature.
Crane duty motors are available in aluminium / cast Iron frames. Frames 80 & 90 shall also be available in cast iron on request. For higher frames, kindly refer to nearest branch office.
All motors are totally enclosed fan cooled (TEFC) as per IS 4691 and are suitable to operate in both outdoor and indoor applications.
The motors are designed with IC0141 method of cooling as per IS 6362 which provides excellent heat dissipation of the motors and ensures longer life of the motor.
Degree of Protection:
Degree of protection for machines are designated in accordance with IS 4691 by letter IP followed by two characteristic numerals corresponding to protection from dust and water. All motors are provided with IP55 degree of protection as a standard and are suitable for operation in dusty and humid environment conditions. Bearing Details all motors are fitted with deep groove ball bearings with C3 clearance and greased for life ensuring longer trouble free operation.