WESTINGHOUSE MAX-VH ™/ MAX-VHP ™ Series vertical hollow shaft induction motor

WESTINGHOUSE MAX-VH ™/ MAX-VHP ™ Series vertical hollow shaft induction motor

Brand positioning and core product values

TECO Westinghouse, as a globally renowned electrical brand with a century of technological accumulation, has launched the MAX-VH ™/ MAX-VHP ™ The series of vertical hollow shaft squirrel cage induction motors are specially designed for industrial heavy-duty scenarios, with a core positioning of "high reliability, strong load adaptation, and high-efficiency energy-saving" power solutions. The product covers a power range of 7.5-1000 HP, suitable for low voltage (230V/460V) and medium voltage (2300V/4000V) power supply, with synchronous speeds covering 900/1200/1800 RPM. It is widely used in industrial equipment such as pumps and compressors that require direct coupling transmission. Its core value lies in stable operation in environments ranging from -15 ° C to 40 ° C, high humidity, and even hazardous environments (Class 1, Div 2) through "high rigidity structural design, F-class insulation system, and multi protection level adaptation". At the same time, with excellent performance such as a 1.15 service factor and 125% overspeed tolerance, it ensures industrial production continuity. Coupled with a 36 month warranty, it provides users with long-term and worry free power support.

Overview of Product Core Technical Parameters

（1） Basic specifications and certification standards

Category specific specifications

Product series MAX-VH ™ (Standard efficiency) MAX-VHP ™ (NEMA High Efficiency Level)

Motor type: squirrel cage induction motor (SCIM)

Power range: Low voltage: 7.5-800 HP; Medium voltage: 200-1000 HP

Voltage adaptation for low voltage: 230V/460V (compatible with 208V), only 460V for 150 HP and above;

Medium voltage: 2300V/4000V

Frequency adaptation 60 Hz (compatible with 50 Hz for low-voltage models)

Synchronous speeds of 900 RPM, 1200 RPM, 1800 RPM

Service coefficient of 1.15 (sine wave power supply, continuous operation); 1.0 (PWM power supply)

Weather Protected Type 1: IP23;

TEFC type (Completely Enclosed Fan Cooled): IP55

Certification standard design standards: NEMA MG-1, MG-13;

Test standard: IEEE-112 (Method B/F);

Hazardous environment certification: CSA Class 1, Div 2, Group B, C, D (Temp T3)

Warranty period of 36 months (from production date)

（2） Structure and material parameters

Category specific specifications

Core structure rack/flange bracket/upper bracket: high-grade cast iron;

Shaft system: 1045 carbon steel hollow shaft (high strength, high wear resistance);

Core: C5 grade cold-rolled insulated electromagnetic steel plate;

External components: aluminum alloy external fan, steel plate vertical splash cover

Winding and insulated stator winding: Low voltage is high pulse withstand polyester enameled copper wire+mica insulation, medium voltage (449TP and above) is mica+glass insulation formed coil;

Insulation level: F-class insulation system (Class B temperature rise);

Immersion treatment: Low pressure phenolic alkyd resin paint (2 immersion baking+1 spraying), medium pressure VPI epoxy paint

Rotor structure 449TP and below: aluminum conductor squirrel cage type (end ring and fan blade integrated casting);

5000 frames and above: copper or copper alloy bar squirrel cage type

Surface treatment: Phenolic anti rust primer+clear coat surface coating, standard color: RAL 7032 textured powder coating

Installation method: flange installation (IM3011), matched with P-Base base (compliant with NEMA MG1-18-238 standard)

（3） Key performance parameters

Category specific specifications

Temperature rise resistance method measurement: ≤ 105 ℃ at S.F.1.15; S. F.1.0 ≤ 80 ℃

Tolerance for overspeed: 125% synchronous speed (lasting for 2 minutes);

Overturn: 160% rated torque (lasting for 15 seconds);

Variable frequency adaptation: 10:1 variable torque (inverter operating condition)

Low voltage startup methods: direct startup, star delta startup, partial winding startup, VFD startup;

Medium voltage: direct start, VFD start

Low voltage models with power factor (FL PF): 81.0% -90.7%; Medium voltage models: 75.6% -87.3%

Full load efficiency (FL EFF) MAX-VH ™： 88.5%-95.4%； MAX-VHP ™： 91.0% -96.2% (NEMA High Efficiency)

Downward thrust 2600 LBS-33800 LBS (graded by power and frame number)

Product System and Core Series Detailed Explanation

（1） Low voltage series (230V/460V)

1. MAX-VH ™  Standard Efficiency Series (VH Model)

Power coverage: 7.5-400 HP (1800 RPM), frame number 213TP-449TP.

Example of core parameters:

VH0754FP (75 HP): Full load efficiency 94.1%, power factor 84.5%, 460V full load current 88.5A, downward thrust 6000 LBS, transport weight 989 LBS.

VH4004FP (400 HP): Full load efficiency 95.4%, power factor 88.5%, 460V full load current 444A, downward thrust 13200 LBS, transport weight 3818 LBS.

Applicable scenarios: General industrial scenarios with moderate energy efficiency requirements, such as ordinary water pumps and fan drives.

2. MAX-VHP ™  Efficient series (VHP/VHTP models)

Power coverage: 7.5-800 HP (1800 RPM), frame number 213TP-5810P, including customized fire pump models (compliant with ANSI/UL 1004-5).

Example of core parameters:

VHP1504 (150 HP): Full load efficiency 95.8%, power factor 86.0%, 460V full load current 171A, downward thrust 10700 LBS, transport weight 1815 LBS.

VHTP8004 (800 HP): TEFC protection, full load efficiency of 96.2%, power factor of 86.0%, 460V full load current of 904A, downward thrust of 10100 LBS, transport weight of 9220 LBS.

Core advantages: NEMA high-efficiency certification, lower energy consumption, suitable for industrial scenarios with strict energy efficiency requirements (such as data centers and high-end manufacturing).

（2） Medium voltage series (2300V/4000V)

1. VHKP high thrust series

Power coverage: 200-1000 HP, speed 1200/1800 RPM, frame number 449TP-5810P.

Example of core parameters:

VHKP5004 (500 HP, 1800 RPM): Full load efficiency of 95.0%, power factor of 87.6%, downward thrust of 30900 LBS, transport weight of 3980 LBS.

VHKP10004 (1000 HP, 1800 RPM): Full load efficiency of 95.0%, power factor of 87.3%, downward thrust of 30100 LBS, transport weight of 6510 LBS.

Applicable scenarios: heavy-duty equipment such as large industrial pumps and compressors that require high thrust and high voltage power supply.

2. VHKTP TEFC high thrust series

Power coverage: 200-700 HP, speed 1200/1800 RPM, frame number 449TP-5810P.

Core features: IP55 protection, suitable for harsh environments, with a maximum downward thrust of 22300 LBS, designed specifically for medium voltage heavy loads and high protection requirements.

Core structure and key component design

（1） Bearing and lubrication system

1. Bearing configuration (graded by frame number)

Frame number range thrust bearing (upper) guide bearing (lower)

213TP-286TP grease refillable angular contact bearing, filled with Polyrex EM grease pre filled grease double shielded rolling bearing

324TP-5810P oil lubricated angular contact/spherical bearing with oil level sight glass (maximum 300% thrust adaptation) bracket installation vacuum degassing open bearing, with grease release valve

2. Requirements for lubricating media

Guide bearing: Lithium based mineral grease (Multemp SRL) or Polyrex EM grease.

Thrust bearing (324TP-449TP): Turbine oil, viscosity 300 S.S.U. @ 100 ° F.

Lubrication key: Oil lubricated models need to regularly check the oil level, while grease lubricated models need to regularly replenish grease according to operating conditions to avoid dry friction damage.

（2） Electrical system design

1. Wiring and terminals

Lead terminal: 210TP-405TP has 12 leads (230V supports partial winding start, 230V/460V supports star delta start); 444TP and above are 6-lead wires (460V supports partial winding startup).

Junction box: made of cast iron material, can rotate 90 °, with threaded interface, convenient for external conduit access, built-in grounding terminal (including P-Base grounding terminal).

2. Protection and safety

Winding protection: F-class insulation system, excellent temperature resistance, suitable for frequency converter pulse impact.

Hazardous environment adaptation: TEFC models have passed CSA certification and can be used in Class 1, Div 2, Group B, C, D scenarios, with a minimum temperature level of T3.

（3） Highlights of Mechanical Structure

1. High rigidity frame

Adopting high-grade cast iron integrated casting, the upper bracket with frame number 449TP-5810P is designed with an integrated oil tank, balancing structural strength and lubrication storage requirements.

The flange bracket size complies with NEMA MG1-18-238 standard, ensuring installation compatibility and transmission stability.

2. Hollow shaft design

1045 carbon steel material, hollow structure reduces weight while ensuring strength, suitable for direct coupling transmission, shaft diameter size graded according to frame number (BX size 1.001-2.501 inches), strict tolerance control (≤ 1.5 inches:+0.001/-0.000 inches; ＞ 1.5 inches:+0.0015/-0.000 inches).

3. Auxiliary components

Standard configuration: wedge key, non reversing pawl (NRR, ball type spark free design), heavy-duty beryllium copper ball to prevent equipment from rotating in the opposite direction and causing damage.

Optional configurations: stable liner, alternative coupler, customized P-Base size.

Installation and operation specifications

（1） Installation requirements

1. Environmental conditions

Temperature: -15 ℃~40 ℃ (WP1 type), TEFC model is suitable for hazardous environments (Class 1, Div 2).

Humidity: ≤ 80% RH (no condensation).

Altitude: ≤ 3300 feet (approximately 1006 meters).

Installation method: Flange installation (IM3011), the P-Base base needs to be matched with the corresponding model according to the frame number (such as 210TP with 31103F412X1C0), and it needs to be machined by the factory before installation.

2. Coupling and fixation

Coupling kit: Each motor comes standard with one set of couplers, and the BX size is adapted according to the frame number (such as 213TP standard BX=1.001 inches). Separate procurement requires pricing according to the list.

Fixed requirement: The anchor bolts should be tightened according to ISO metric thread to ensure no vibration displacement during the transmission process.

（2） Operating standards for operation

1. Check before startup

Electrical inspection: power supply voltage fluctuation ≤ ± 10%, frequency fluctuation ≤ ± 5%, three-phase voltage balance; The insulation resistance meets the standard (F-class insulation ≥ 100 M Ω @ 40 ℃).

Mechanical inspection: The oil level of the oil lubricated model is within the normal range of the sight glass, and there is no grease leakage in the grease lubricated model; The bearing is not stuck, and the hollow shaft rotates smoothly; The function of the non reversing pawl is normal.

Protection inspection: WP1 type protective net is undamaged, TEFC model is well sealed, and there is no foreign object intrusion.

2. Operation monitoring

Key parameters: Full load current not exceeding rated value, three-phase current imbalance ≤ ± 5%; Bearing temperature ≤ 95 ℃, winding temperature ≤ 105 ℃ (S.F.1.15).

Exception handling: If overspeed or over torque conditions occur, it is necessary to ensure that the duration does not exceed the specified limit; When abnormal noise or increased vibration occurs, immediately stop the machine to investigate bearing or coupling issues.

3. Shutdown specifications

Normal shutdown: First reduce the load, then cut off the power. TEFC models need to wait for the fan to completely stop before shutting down the cooling system.

Long term shutdown: Rotate the hollow shaft regularly (at least 1 turn per month) to avoid bearing corrosion; Oil lubricated models require draining the oil tank, while grease lubricated models require replenishing new grease.

Maintenance and upkeep system

（1） Maintenance cycle and core projects

Key operational points for core projects in the maintenance cycle

Daily visual inspection and oil level monitoring check that the motor surface is free of damage, grease and oil leakage; The oil level of the lubrication model is at the center position of the sight glass

Weekly current/temperature monitoring+abnormal noise investigation records three-phase current and bearing temperature; Listen to the sound of the motor running, no abnormal vibration or friction sound

Monthly bearing maintenance+junction box inspection, grease lubrication for machine models (quantified by bearing model); The terminal of the junction box is not loose or oxidized

Measure the insulation resistance of the winding with a 500VDC megohmmeter every quarter to ensure it is ≥ 100 M Ω at 40 ℃

Annual comprehensive disassembly inspection and cleaning of winding dust; Check the wear of the bearings and replace them if necessary; Check for no reverse pawl function

Deeply maintain and replace bearings and lubricating media every 3 years; Check the connection between the rotor guide bar and the end ring; Re tighten all bolts

（2） Key component maintenance details

1. Bearing maintenance

Lubricating with grease: Add grease according to the bearing model (such as 6312C3, add 40g of grease), and run without load for 10-30 minutes after adding grease to discharge the old grease.

Oil lubrication: Replace the turbine oil once a year, rinse the oil tank with a cleaning agent before replacement to ensure that there are no impurities left; Timely replenish when the oil level is below the minimum mark to avoid dry friction.

2. Winding maintenance

Cleaning: Use compressed air (pressure ≤ 4 kg/cm ²) to blow away dust on the surface of the winding, wipe off oil stains with neutral cleaner, and prohibit the use of chlorine containing solvents.

Moisture prevention: When the machine is shut down for a long time, use the space heater to maintain the winding temperature 3 ℃ higher than the dew point to prevent condensation from damaging the insulation.

3. Maintenance of Non Reversing Claw (NRR)

Regularly check the engagement between the pawl and ratchet, ensuring no jamming or wear; Replace the pawl ball bearings every 3 years to avoid reverse rotation failure.

Selection Guide and Application Scenarios

（1） Selection core logic

Power matching: Select the motor power based on 1.2 times the rated load power, ensuring redundancy (such as selecting a 60 HP motor for a 50 HP load).

Voltage adaptation: Choose 230V/460V for low voltage scenarios (≤ 400 HP) and 2300V/4000V for medium voltage scenarios (≥ 200 HP).

Protection level: Choose WP1 (IP23) for ordinary industrial environments, and TEFC (IP55) for humid/dusty/hazardous environments.

Energy efficiency requirement: MAX-VH is selected for general scenarios ™， Choose MAX-VHP for energy-saving scenarios (such as continuous operation equipment) ™ (NEMA high efficiency level).

Thrust adaptation: Select the corresponding frame number for downward thrust according to the load (e.g. 444TP frame for 10000 LBS thrust).

（2） Typical application scenarios

Industrial pumps: fire pumps, sewage pumps, chemical centrifugal pumps (especially large pump sets that require high thrust and direct coupling).

Compressors: air compressors, refrigeration compressors, suitable for continuous operation conditions.

General machinery: fans, transmission gearboxes, suitable for scenarios with high requirements for speed stability.

Special environments: hazardous environments such as petrochemicals and mines (TEFC models), high temperature/high humidity industrial workshops (WP1 models).