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Electric Motors - SHARP SQUIRREL CAGE INDUCTION MOTORS

Sharp TEFC Squirrel Cage Induction Motors are designed, manufactured and tested to meet the latest British and international standards. Their proven high quality and rugged cast iron construction backed by a 12 month warranty make the Sharp Squirrel Cage Induction Motors ideally suitable for all industrial applications.

Rating and Standards

Electric Supply:

Three Phase motors are suitable for 415V ± 10%, 3 Phase, 50 Hz ± 5% supply. For combination of voltage and frequency maximum variation of 10% is allowed.

Single Phase motors are suitable for 220V ± 10%, 50Hz ± 5% supply. For combination of voltage and Frequency maximum variation of 10% is allowed.

Motor of variable voltage and dual voltages can be supplied on specific order / request.

Enclosure:

The standard protection is IP 54/IP 55.

Insulation:

All motors are of Class ‘F’ insulation with temperature rise restricted to Class ‘B’ limits, ensuring reliability and long life.

Duty Rating:

All motors are continuously maximum rated type S1 as per DIN EN 60034-1 at 50Hz, 40ºC and 1000 m. Motors of other duty conditions (S2, S3 etc) can be offered on request.

Ambient:

Standard Motors are designed to operate in an ambient temperature of -20ºC (-4ºF) to 45ºC (113ºF).

Altitude:

Standard motors are designed for operation at an altitude not exceeding 3300 feet (1000 meters) above, sea level. For higher altitudes derating of output kW may be necessary.

Mounting:

Motors are available in foot mounted and flange mounted designs confirming to IEC 72 (Dimensions only)/DIN 42673/ISI231 and IEC 72 (Dimensions only)/DIN 42677/IS 2223 standards respectively

Construction

Frames and Endshields:

Stator frames and end shields are made from high grade cast iron for exceptional strength and corrosion resistance. They are accurately machined to close tolerance in order to ensure rigid alignment and minimum vibration.

Cooling system:

Cooling fins are cast integrally with Stator frame and endshields. High airflow external fans with stator frames of deep fins construction ensure adequate cooling of the motor. Ensuring extended motor life.

Fan and Fan Cowl:

Polypropylene fans are fitted for effective cooling. Fan cowls are of heavy gauge pressed steel, construction, securely bolted to the motor endshield.

Stator Assembly with Winding:

The integral system of wire, slot and phase insulation and the overall varnish impregnation provide superior winding rigidity capable of withstanding vibration limits.

Bearing:

Standard motors are fitted with high quality double side sealed, C3 Clearance ball/bearings with pre-packed lubricants.

Rotor Assembly:

The rotor core consists of annealed and insulated laminations with a pressure die-cast high conductivity aluminium cage. Integrally cast with the cage are wafter blades and balance weight supports. The whole assembly is dynamically balanced to ensure quiet and vibration free operation.

Terminal Box:

Terminal boxes are rotatable 4 x 90 degree increments. Permitting the cable entry from any direction.

The terminal box is well sealed and located at the right hand side of the frame. Earthing terminal is provided in all motors.

Hardware:

All hardware is electro zinc plated for better corrosion resistance.

Finish:

All inside exposed surfaces are cleaned and sprayed with a corrosion inhibiting coating. All components are mechanically or chemically cleaned prior to the application of a phenolic rust proof primer giving excellent corrosion protection. The assembled motor is finished in a super enamel grey lacquer.

Testing:

Each motor undergoes a full program of tests during manufacture and prior to despatch as per IEC 34-1 /DIN EN 60034-1/IS 325 standard.

Range:

KW – 0.18 kW to 15 kW.
Speed – 750/ 1000/ 1500/3000 rpm
Special Motors – As per customer’s requirement.

Selection chart and Electrical Data of single phase
Standard Squirrel Cage Motors 240V – 50 Hz TEFC Class F Insulation

Frame Size	Output		Rated Current at 220V (Amps)	Speed (rpm)	Power Factor	Efficiency %	Starting Current (% of Full Load Current)	Starting Torque (% of Full Load Torque)
Frame Size	(kW)	(HP)	Rated Current at 220V (Amps)	Speed (rpm)	Power Factor	Efficiency %	Starting Current (% of Full Load Current)	Starting Torque (% of Full Load Torque)
63*	0.18	0.25	1.4	1440	0.9	70	430	16
71*	0.25	0.33	2.0	1440	0.9	70	450	33
71*	0.37	0.50	2.5	1440	0.92	72	400	40
80*	0.55	0.75	3.0	1440	0.92	72	470	41
90S*	0.75	1.0	6.0	1440	0.94	75	450	30
90L*	1.10	1.5	8.0	1440	0.94	78	400	30
90L*	1.50	2.0	10.0	1440	0.95	78	400	30
63*	0.18	0.25	1.40	2880	0.9	70	430	33
71*	0.37	0.5	2.4	2880	0.9	70	420	33
80*	0.75	1.0	6.0	2880	0.92	75	450	28
90S*	1.10	1.5	8.0	2880	0.92	75	450	27
90L*	1.5	2.0	10.0	2880	0.95	78	400	30
71**	0.18	0.25	2.4	1440	0.6	60	420	180
80**	0.25	0.33	3.6	1440	0.62	62	420	200
80**	0.37	0.50	4.7	1440	0.65	68	425	280
90S**	0.55	0.75	6.0	1440	0.68	68	400	190
90L**	0.75	1.0	8.0	1440	0.70	70	420	200
100L**	1.10	1.5	10.0	1440	0.72	71	400	200
112M**	1.5	2.0	15.0	1440	0.75	72	400	200
71**	0.18	0.25	2.5	2880	0.6	60	400	200
80**	0.37	0.50	4.7	2880	0.62	62	530	200
90S**	0.75	1.0	7.5	2880	0.65	65	400	200
100L**	1.10	1.5	10.0	2880	0.68	68	500	200
112M**	1.50	2.0	15.0	2880	0.70	70	500	200

*Capacitor Start and run type
**Capacitor Start and Induction run type

Selection chart and Electrical Data of 3 phase
Standard Squirrel Cage Motors 415V – 50 Hz TEFC Class F Insulation

Frame Size	Output		Rated Current at 415V (Amps)	Speed (rpm)	Power Factor	Efficiency %	Starting Current (% of Full Load Current)	Starting Torque (% of Full Load Torque)
Frame Size	(kW)	(HP)	Rated Current at 415V (Amps)	Speed (rpm)	Power Factor	Efficiency %	Starting Current (% of Full Load Current)	Starting Torque (% of Full Load Torque)
80	0.25	0.33	1.0	680	0.59	61	3.2	1.7
90S	0.37	0.50	1.4	680	0.60	62	3.5	1.8
90L	0.55	0.75	1.9	680	0.60	67	3.5	1.8
100L	0.75	1.0	2.2	700	0.68	70	4.2	1.9
100L	1.1	1.5	3.2	700	0.67	72	4.2	1.9
112M	1.5	2.0	4.0	710	0.69	75	4.5	1.9
132S	2.2	3.0	5.3	720	0.72	80	4.8	1.8
132M	3.7	5.0	8.5	720	0.75	81	4.8	1.8
71	0.18	0.25	0.75	900	0.60	55	250	200
71	0.25	0.33	0.96	900	0.64	54	250	200
80	0.37	0.50	1.30	910	0.66	60	350	200
80	0.55	0.75	1.60	920	0.68	70	350	220
90L	0.75	1.00	2.00	920	0.72	72	450	220
90L	1.10	1.50	2.80	920	0.73	75	450	240
100L	1.50	2.00	3.80	925	0.73	76	450	250
112M	2.20	3.00	4.80	925	0.79	80	500	250
132S	3.70	5.00	7.80	940	0.79	83	500	210
132M	5.50	7.50	11.5	950	0.79	85	500	220
63	0.18	0.25	0.60	1330	0.71	59	300	220
71	0.25	0.33	0.80	1350	0.70	62	350	210
71	0.37	0.50	1.05	1370	0.72	68	380	200
80	0.55	0.75	1.50	1400	0.75	68	400	200
80	0.75	1.00	1.80	1400	0.80	73	450	250
90S	1.10	1.50	2.60	1410	0.78	75	450	250
90L	1.50	2.00	3.50	1400	0.78	76	450	250
100L	2.20	3.00	4.60	1420	0.83	80	500	230
112M	3.70	5.00	7.50	1420	0.83	83	550	250
132S	5.50	7.50	10.50	1440	0.86	85	500	250
132M	7.50	10.00	14.5	1440	0.85	85	500	260
63	0.18	0.25	0.55	2650	0.79	58	400	210
71	0.25	0.33	0.76	2750	0.78	57	400	210
71	0.37	0.50	1.05	2780	0.78	63	450	200
80	0.55	0.75	1.35	2780	0.79	72	450	230
80	0.75	1.00	1.80	2800	0.79	73	500	220
90S	1.10	1.50	2.60	2800	0.79	75	500	220
90L	1.50	2.00	3.20	2800	0.83	79	500	230
100L	2.20	3.00	4.50	2820	0.83	82	500	250
100L	3.70	5.00	7.30	2840	0.86	82	500	250
132S	5.50	7.50	10.00	2860	0.88	87	500	250
132M	7.5	10.00	15.00	2870	0.88	87	500	260

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