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

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

TECO-Westinghouse MAX-VH ™/ MAX-VHP ™ Series of vertical hollow shaft induction motors, covering a power range of 7.5-1000 HP, suitable for 230V/460V (low voltage), 2300V/4000V (medium voltage) voltage, synchronous speed of 900/1200/1800 RPM, using high-grade cast iron frame, 1045 carbon steel hollow shaft and F-class insulation system, with a protection level of IP23 (WP1)/IP55 (TEFC), certified by NEMA MG-1/MG-13 standards, with a service factor of 1.15 and a 36 month warranty. The core application is in direct coupling scenarios such as pumps, supporting direct start, star delta start, VFD start, and key performance including 125% overspeed tolerance and 160% rated torque tolerance. It is a highly reliable power equipment for industrial heavy-duty scenarios

Product System and Core Parameters

Product series MAX-VH ™ (Standard efficiency) MAX-VHP ™ (NEMA efficient)

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 (208V compatible), only 460V for 150 HP and above; medium voltage: 2300V/4000V

Frequency adaptation 60 Hz (low voltage compatible 50 Hz)

Synchronous speeds of 900 RPM, 1200 RPM, 1800 RPM

Service coefficient 1.15 (sine wave power supply); 1.0 (PWM power supply)

Weather Protected Type 1: IP23; TEFC type (Completely Enclosed Fan Cooled): IP55

Certification standards NEMA MG-1, MG-13; Test standard: IEEE-112 (Method B/F)

Warranty period of 36 months (from production date)

Structural Design and Core Configuration

（1） Key materials and construction

Rack and connectors: High grade cast iron rack, flange bracket (P-Base), upper bracket, TEFC type with oil tank design (324TP-5810P).

Shaft system: 1045 carbon steel hollow shaft, ensuring high strength and transmission reliability.

Core and winding: C5 grade cold-rolled electromagnetic steel core; The stator winding adopts polyester enameled copper wire (low voltage), mica+glass insulated formed coil (medium voltage 449TP and above), F-class insulation system, and is treated with immersion paint baking.

External components: aluminum alloy external fan, steel plate vertical splash proof cover, cast iron junction box (can rotate 90 °, supports external conduit connection).

（2） Bearing and lubrication system

Bearing type specifications and lubrication method applicable models

Thrust bearing (upper) angular contact bearing, Polyrex EM grease lubricated 213TP-286TP

Thrust bearing (upper) angular contact/spherical bearing, turbine oil lubrication (300 S.S.U. @ 100 ° F) 324TP-5810P

Guided bearing (lower part) double shielded rolling bearing, pre filled with lubricating grease 213TP-286TP

Guide bearing (lower part) open type bearing with grease release valve 324TP-5810P

Key Performance and Operating Conditions

（1） Core performance indicators

Overspeed tolerance: 125% synchronous speed, lasting for 2 minutes.

Torque tolerance: 160% rated torque, lasting for 15 seconds.

Variable frequency operating condition: 10:1 variable torque adaptation.

Temperature rise: measured by resistance method, ≤ 105 ℃ at S.F.1.15 and ≤ 80 ℃ at S.F.1.0.

Startup performance: Full voltage startup, measured according to IEEE-112 standard for startup parameters.

（2） Operation and environmental conditions

Environmental temperature: -15 ℃~40 ℃ (WP1 type); Dangerous environment (TEFC type): CSA certified Class 1, Div 2, Group B, C, D, minimum temperature level T3.

Relative humidity: ≤ 80% RH (no condensation).

Altitude: ≤ 3300 feet (approximately 1006 meters).

Power supply fluctuation: voltage ± 10%, frequency ± 5%, combined fluctuation ± 10% (frequency fluctuation ≤± 5%).

Installation method: Flange installation (IM3011), only supports direct coupling transmission.

Main series and key parameter table

（1） Low voltage series core parameters (460V, 1800 RPM)

Series model example Power (HP) Frame number Full load efficiency (%) Full load current (A) Downward thrust (LBS) Approximate transport weight (LBS)

MAX-VH ™  VH0754FP 75 365TP 94.1 88.5 6000 989

MAX-VH ™  VH4004FP 400 449TP 95.4 444 13200 3818

MAX-VHP ™  VHP1504 150 444TP 95.8 171 10700 1815

MAX-VHP ™  VHP8004 800 5810P 96.2 859 30100 6400

（2） Core parameters of medium voltage series (4000V, 1800 RPM)

Series model example Power (HP) Frame number Full load efficiency (%) Downward thrust (LBS) Approximate transport weight (LBS)

VHKP VHKP5004 500 5009P 95.0 30900 3980

VHKP VHKP10004 1000 5810P 95.0 30100 6510

Additional configurations and optional features

Standard configuration: wedge key, non reversing pawl (NRR, ball type spark free design), heavy-duty beryllium copper ball, junction box internal/external grounding terminal.

Optional configurations: Stable liner, alternative upper coupler, alternative P-Base size, digital/analog metering kit.

Coupling kit: Each motor includes 1 set of couplers, and individual purchases need to be priced according to the list. The BX size tolerance is strictly controlled (≤ 1.5 inches:+0.001/-0.000 inches; ＞ 1.5 inches:+0.0015/-0.000 inches).