TEFC Flame Proof Motors Exd
An explosive atmosphere is one where a mixture with air under atmospheric conditions of flammable substances in the form of gas, vapour or mist, exists in such proportion that it may explode due to excessive temperature, arcs or sparks. Flameproof motors were once manufactured with an enclosure constructed in such a manner that any explosion inside is not capable of igniting an explosive atmosphere outside the enclosure and the surface temperature is safe enough not to ignite the outside explosive atmosphere.
KEY FEATURES
The winding insulations system is class F in accordance with IEC 85.
All rotors are dynamically balanced with half key to ensure normal class of vibration level as per IEC®* 60034-14.
Motors can be wound for any voltage from up to 6.6KV and for 50 Hz frequency with preferred voltage of 415V, 690V, 3300V, 6600V.
Motors are suitable for operation ±10% voltage variation and ±5% frequency variation with permissible combined variation of 10%.
Noise level for KF series flameproof motors conforms to the requirement of IEC 60034-9.
All standard motors are suitable for withstanding mechanical over speed of 120 % for 2 Minutes.
Specification
Frame: IEC 280 to IEC 450
Power Rating: upto 750 kW
Voltage: 3.3KV / 6.6KV
Frequency: 50Hz +- 5%
Pole: 2 to 8
Application
Mining, Oil & Gas, Compressor Drive, Blower
Non-Sparking Motors Ex 'ec'
High Voltage TEFC Flowpak motors are part of an integrated range of induction machines, manufactured in a modern production facility. Flowpak is a range of totally enclosed fan-cooled cage induction motors available horizontally or vertically mounted for supply voltages up to 6.6 kV, and outputs up to 800 kW. Flowpak range has a frame size with shaft center heights of 280, 315, 355, 400, 450 & 500 mm. Standard designs cover 2 to 10 pole speeds, and all sizes of speeds are available with grease-lubricated bearings.
KEY FEATURES
High efficiency – upto 96%
Low noise level (MSPL) – upto 85 dB (A) at 1 mt. distance with silence arrangements.
Low starting current – upto 550% for 4 Pole.
High torque – 80% Voltage Starting on load “square low” drives.
High flexibility – a detailed study of market requirements
Low Cost – Internationally Competitive.
Specification
Frame: IEC 280 to IEC 560
Power Rating: upto 1.5 MW
Voltage: 3.3KV / 6.6KV / 11KV
Frequency: 50Hz +- 5%
Pole: 2 to 14
Increase safety EX ec /Ex
Application
Pump, Compressor Drive, Fan, blower, Conveyor & dredging application