tefc7

e-mail:iec@giaspn01.vsnl.net.in

Kirloskar Electric Motors :

T.E.F.C. Squirrel Cage \| Crane Duty Motors \| Flame Proof Squirrel Cage
	T.E.F.C. SQUIRREL CAGE A.C. INDUCTION MOTORS
		Click Here To Print

SUPPLY CONDITIONS :

Voltage
Frequency
Combined variation
Ambient
Duty
Insulation
Protection (Enclosure)
Cooling

:
:
:
:
:
:
:
:

415 V ± 10%
50 Hz ± 5%
± 10%
50 ^o C
S1
Class “F”
IP 55
IC 0141

Effect of Voltage and Frequency Variation on the Characteristics of the Motor.

A. C. Induction Motors

Characteristics	Voltage		Frequency
	110%	90%	105%	95%
Torque* Starting and Maximum running	Increase 21%	Decrease 19%	Decrease 10%	Increase 11%
Speed ** Synchronous Full Load Percent slip	No Change Increase 1% Decrease 17%	No Change Decrease 1.5% Increase 23%	Increase 5% Increase 5% Little Change	Decrease5% Decrease5% Little Change
Efficiency : Full Load ¾ Load ½ Load	Increase0.5to1% Little Change Decrease 1 to 2%	Decrease 2% Little Change Increase 1 to 2%	Slight Increase -do- -do	Slight Decrease -do- -do-
PowerFactor: Full Load ¾ Load ½ Load	Decrease 3% Decrease 4% Decrease 5 to 6%	Increase 1% Increase 2 to 3% Increase 4 to 5%	-do- -do- -do-	-do- -do- -do-
Current : Starting Full Load	Increase10 to12% Decrease 7%	Decrease10 to12% Increase 11%	Decrease 5 to6% Slight Increase	Slight decrease Slight Increase
Temperature rise	Decrease 3 to 4%	Increase 6 to 7%	-do-	-do-
Maximum overload capacity	Increase 21%	Decrease 19%	-do-	-do-
Magnetic noise	Slight Increase	Slight decrease	-do-	-do-

*The starting and maximum running torque of A.C. induction motors
will vary as the square of the voltage.
** The speed of A.C. induction motors will vary directly with the frequency.

Back	Next
The Indian Electric Co.,Bharat Bhavan, 1360 Shukrawar Peth, Natu Baug, Pune - 411 002 (India) Phone No. : 020-4474303, 020-4473038 Fax No.: 020-4473037, 020-4470807 e-mail : iec@giaspn01.vsnl.net.in	About Us \| Products \| Services \| Stock \| FAQs Feedback \| Search \| Contact Us\|Home