WESTINGHOUSE Three Phase Induction Motors

WESTINGHOUSE Three Phase Induction Motors

Product positioning and core values

The large cast iron frame three-phase induction motor (IEC 280/NEMA 444 and above specifications) launched by TECO Westinghouse is the core power equipment for industrial heavy-duty scenarios, designed specifically for large-scale mechanical drive in industries such as steel, chemical, mining, and power. The product has the core advantages of "high rigidity, high reliability, and strong load adaptability". It adopts a cast iron frame structure and supports various installation methods such as horizontal feet and vertical flanges. It is compatible with transmission forms such as couplings, belts, and gears, and can stably drive heavy-duty equipment such as pumps, fans, compressors, and crushers. Its core value lies in ensuring long-term stable operation in complex industrial environments such as -20~+40 ℃, high humidity, and high dust through "strict manufacturing standards, perfect protection systems, and scientific operation and maintenance norms". At the same time, with precise installation and maintenance requirements, it maximizes the service life of equipment and reduces the risk of industrial production interruption.

Overview of Product Core Technical Parameters

（1） Basic specifications and installation parameters

Framework and Structure: Large cast iron frame with IEC 280 (corresponding to NEMA 444) and above, fully enclosed (TEFC) or semi enclosed (TENV) protective structure, excellent dust and moisture resistance.

Installation method:

Core types: Horizontal Foot Installation (HFM), Vertical Flange Installation (VFM), supporting customized methods such as vertical hollow shaft and end face installation.

Transmission adaptation: compatible with coupling transmission (rigid/flexible), belt transmission (flat belt/V-belt), chain/gear transmission, to meet different equipment connection needs.

Physical and installation dimensions:

The cast iron frame has strong rigidity and can withstand the weight of the motor and the thrust load during operation. The spacing between the bottom bolt holes is standardized and suitable for industrial universal bases.

Key installation tolerances: Coupling installation end face runout ≤ 0.05mm, shaft diameter tolerance according to H6 standard to ensure transmission accuracy.

（2） Electrical and Environmental Parameters

Parameter category specific specifications

Insulation and resistance: Random winding insulation resistance ≥ 5M Ω, formed winding ≥ 100M Ω (calibrated at 40 ℃, measured with a 500VDC megohmmeter); Insulation level F, allowable temperature rise of 105K

Voltage and frequency: The rated voltage is configured according to the order (commonly 380V, 6kV, 10kV), and the voltage fluctuation is allowed to be ± 10%; Rated frequency 50/60Hz, allowable fluctuation ± 5%

Environmental adaptability working temperature: -20~+40 ℃; Storage temperature: -20~+70 ℃;

Humidity: Fully enclosed models ≤ 95% RH (non condensing), semi enclosed models ≤ 80% RH;

Altitude: ≤ 1000m (for use at altitudes exceeding 1000m, a 10% reduction in capacity is required for every 1000m increase);

Vibration tolerance: ≤ 3.8mm/s during operation, ≤ 2.5mm/s during storage

Protection configuration winding overheating protection: alarm threshold 140 ℃, trip threshold 155 ℃;

Bearing temperature protection: sliding bearing alarm 90 ℃, trip 95 ℃, rolling bearing alarm 95 ℃, trip 105 ℃;

Other protections: overload protection (1.15 times rated current, 1-hour trip), single-phase operation protection, ground fault protection

（3） Run restriction parameters

Start frequency: Up to 2 consecutive starts in cold state (motor temperature ≤ ambient temperature+10 ℃), with an interval of ≥ 5 minutes between each start; Hot state (shutdown after operation) only allows one start, and another start requires cooling for 30-60 minutes (60 minutes at full load and 30 minutes at no load).

Starting current: When starting directly, the starting current is 6-8 times the rated current. It is recommended to configure a soft starter or star delta starter device to reduce grid impact.

Load requirements: During operation, the three-phase current imbalance should not exceed ± 5%. Long term loads should not exceed 110% of the rated power, and short-term overloads (≤ 15 minutes) should not exceed 120%.

Key process specifications for the entire lifecycle

（1） Receiving and Inspection Process

1. Core steps of arrival acceptance

Appearance and packaging inspection: The outer packaging is not damaged or deformed. After opening the box, check that the key parts such as the cast iron frame, end cover, and shaft extension of the motor are not bumped, scratched, or corroded. The fan cover and junction box are intact and undamaged.

Parameter and identification verification: The rated power, voltage, frequency, speed, insulation level, protection level and other parameters on the motor nameplate are consistent with the order; The directional arrow, grounding label, and wiring terminal label are clear and accurate.

Attachment and document verification: The supporting accessories (anchor bolts, couplings, wiring terminals, sealing rings) are complete; The product manual, certificate of conformity, testing report, maintenance manual and other technical documents are complete.