Three phase induction motor is one of ac machines family. It converts the ac electrical power input into a mechanical power output. The conversion process takes place through the rotating magnetic field. Its theory of operation is based on the mutual electromagnetic induction between the primary circuit and secondary circuit. Three-phase induction motors are the most widely used electric motors in industry. When fed from constant voltage constant frequency they run at nearly constant speed from no-load to full-load. 3-phase induction motors are simple, rugged, low-priced, easy to maintain and can be manufactured with characteristics to suit most industrial requirements. Nowadays, with the development of power semiconductors, induction motors may be considered as serious rivals to dc motors in many speed control systems.

Product Description

3 Phase Squirrel Cage Induction Motors

Catco Uk Motors are suitable for the most diverse applications. The Motors are available
in the wide range from frame sizes 63 to 355L. These Motors conform to eff1 and eff2 requirements for
efficiency. These motors have a high efficiency and high uptime. Consequently the productivity is higher and
energy consumption lower. The motors have low life cycle costs, hence great saving!!!

Range
These motors are available in Aluminium as well as cast iron motor housing depending on the customers requirement.

Voltage and Frequency
These motors are suitable for 415V ±10%, 50Hz ±5%, combined ±10%, 3 phase AC supply.

Ambient Temperature
All motors in normal design are suitable for an ambient temperature up to 50°C.

Service Factor
All standard motors have a service factor of 1.1, when operating at rated supply conditions, ambient temperature up to 50°C
and altitude up to 1000m, with temperature rise limited to class F limits.

Output
The rated output, as given in the selection and ordering data, is applicable for continuous operation as per IS:325 at
415V, 50Hz supply, ambient temperature up to 50°C and altitude upto 1000m abovemean sea level.
The motors are provided with Class ‘F’ insulation, thermally utilised to Class ‘B’ limits, at rated output and rated voltage /
frequency and with sinusoidal supply. For use of standard motors at ambient temperatures exceeding 50°C and/or altitudes
exceeding 1000m above mean sea level, the multiplication factors as listed in the table below must be applied on the rated output.
By utilising to Class ‘F’ limits, at rated voltage and frequency, the rated output can be derived from these motors even if
the ambient temperature goes upto 55°C.

Overload Capacity
The motors are capable of withstanding 1.5 times the rated current at rated voltage and rated frequency for 2 minutes.

Insulation
Insulation system comprises dual coat enameled wires with a temperature class 200 and widely proven NOMEX based
insulating material combined with alkydbased varnish. The system ensures high thermal, mechanical and electrical
strength and also long life for the motors. The insulation system offers excellent protection for the windings against
corrosive gases, vapours, dust, oil and high humidity, as well as excellent resistance to the normal stresses of vibration.

Standards
Performance conforms to IS:325 and dimensions conform to IS:1231, IS:8223.

Degree of Protection
Motors are designed for degree of protection IP 55 according to IS:4691

Frame design
In Cast Iron motors the housing are of Cast Iron and terminal boxes are of aluminium. For Aluminium body motors, both housing and terminal boxes are of Aluminium. The motors can be offered in foot mounted construction (IMB3, IMB6, IMB7, IMB8, IMV5, IMV6) or in flange mounted construction (IMB5, IMV1, IMV3). Foot cum flange construction B35

Operation with VFD
Operation of the motors with ‘MASTER DRIVES’ – Variable voltage, Variable frequency drives – is possible at voltages < 500V.
It is also possible to use these motors with PWM drive converters with voltage rise times of tS > 0.1μs at the motor terminals.

Cooling Fan and Fan cover
The external cooling fan is of anti-static, thermo-plastic and is suitable for both directions of rotation.
The fan cover is manufactured from corrosion resistant sheet steel.

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