Reinforced 355 Frame, Total Net Weight 1700KG
The 340HP three-phase motor adopts an integrated cast steel reinforced 355 frame structure. The complete machine weighs 1,700 kilograms, featuring excellent bending and compression resistance of the motor body. No casing deformation occurs during long-term full-load operation, making it suitable for heavy-load working conditions in metallurgy and mining industries.
Class H High-Temp Winding Insulation, IP55 Sealed Protection
Our motor stator coils adopt Class F ultra-high temperature resistant insulating materials. Equipped with an integrated sealed end cover, they achieve IP55 dust-proof and splash-proof protection, enabling long-term non-stop operation in high-temperature smelting workshops and dusty open-air factories.
250KW / 340HP High Power Three-Phase Industrial Output
Our AC asynchronous motor has a rated power of 250 kilowatts (340 horsepower) with three-phase power output. It features abundant starting torque reserve, supports the common industrial voltages of 380V/415V, and is compatible with large blowers, screw compressors and heavy-duty lifting equipment.
Ultra-High Efficiency Electromagnetic Design, Lower Energy Loss
The 250kW three-phase electric motor adopts ultra-thin cold-rolled silicon steel sheets and low-loss winding wiring. It can significantly reduce reactive power loss during all-weather continuous factory operation and effectively cut electricity expenses with long-term use.
Double-End Heavy-Duty Spherical Roller Bearings, Strong Anti-Impact Capacity
Larger-sized spherical roller bearings are installed at both ends of the motor, capable of withstanding short-term impact loads and radial eccentric forces. The service life of the bearings is increased by over 60% under working conditions involving frequent start-stop cycles and heavy load fluctuations.
Split Strong Convection Cooling System, Stable Temperature Rise Control
Our three-phase motors adopt an independent axial-radial composite heat dissipation air duct, which greatly expands the heat dissipation area. The temperature rise of the motor body can be controlled during long-term full-load operation, preventing insulation aging caused by high temperatures and extending the overall service life of the motor.
Q: Does this 340HP (250KW) 355 frame motor support dual voltage switching?
A:Standard models support 380V/660V dual voltage wiring switch with two sets of terminals inside terminal box. If your local grid is 415V or 440V for overseas projects, we can customize corresponding windings before delivery without on-site rework.
Q:Does this motor require an extra external cooling fan during long-hour full-load operation?
A:It is equipped with a built-in coaxial centrifugal cooling fan as standard, no extra fan needed for normal 24/7 continuous full-load work. Independent forced cooling fan assembly is optional only for closed unventilated rooms with ambient temperature above 40℃.
Q:What starting methods are available for this 250KW three-phase motor? Can it start with full voltage directly?
A:Four starting modes are available: direct full-voltage start, star-delta reduced voltage start, soft starter and VFD start. Due to high power rating, direct on-line start is allowed only under no-load condition; soft starter is suggested for heavy-load startup to protect power grid.
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