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Inverter Duty Motors with Forced Cooling
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Havells manufactures squirrel cage inverter duty motors which are specially designed for operations requiring wide speed variation through variable speed drives. These motors are generally used when the motor is running for longer duration at speeds below 70% of rated name plate speed.
Inverter duty motors operate at constant torque upto rated design frequency when connected with variable frequency drives.The motors are fitted with separate cooling arrangement which ensures that the motors perform successfully at lower speeds without over-heating of the motor. This also ensures that the loading capacity of the motor is not reduced in this range.All external cooling fans are rated at 3000 rpm which provide excellent cooling to the motors even at lower speed of operation.
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Features
Voltage : 3 Ph., 415 V (Other voltage as per requirement)
Frequency : 50 Hz (Other frequency as per requirement)
Ambient : 50 Deg. C
Ins. Class : F (Temp. rise Class B)
Range : 0.37 kW to 55 kW
Pole : 2, 4, 6 and 8 Pole
Frame : 80 to 250
Frequency Range : 20 to 75 Hz
Mounting : B3, B5, B14 and combination
Cooling : IC 416
Enclosure : Totally Enclosed Separately Cooled
Protection : IP 55
Standards : IS: 325, IS: 1231, IS: 2223 IS: 4722
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| Deration Factor for Higher Ambient |
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Ambient Temp. |
Deration Factor |
55 Deg. C |
0.94 |
60 Deg. C |
0.88 |
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Encoder Mounting
The motors are provided with encoder mounting arrangement as a standard feature which is required by customers for motor control.
While selecting the motor, maximum allowed speed of the motor is also to be considered. For 2 pole motors, the maximum allowed speed is 4000 rpm and for 4 pole motors, it is 3600 rpm.
When the nominal supply voltage of the converter is more than 500 V, it is recommended to use du/dt filters which reduce voltage stresses in the winding by reducing the rate of change of phase and main voltages.
The use of converters with motors also demands extra requirements in terms of cabling and grounding of the drive system. Although asymmetrical cables can be used for the cabling but it is recommended to use shielded symmetrical cables along with EMC glands. |
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Authorised Dealers for : |
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D/1225, 10, Karnik Heritage, 3rd Floor, F.C. Road, Shivaji Nagar, Pune - 41104., Maharashtra, India |
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Tel No.: + 91 020 25511860, 41228330,
Fax No.: + 91 020 25511860,
Mobile No.:+ 91 9423014677, 9552508077 |
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| Email : response@acdrivesindia.co.in |
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