PowerMaster Model T Door Operator for Standard Lift Sectional Doors

The PowerMaster Model T is a high-performance drawbar operator engineered for Standard Lift Sectional Doors in demanding industrial environments. Designed for reliability and durability, it combines a robust motor with advanced control features to ensure smooth and efficient operation.

Note: This listing is for the powerhead only. Rails are not included.

Product Overview

• Motor:
  The Model T features a high starting torque, continuous duty industrial motor, protected against overload via either a current-sensing or thermal overload device. Available in 1/2 HP or 3/4 HP, the motor is suitable for both single-phase (115/230V) and three-phase (230/460V) power sources.

• Controller:
  A heavy-duty, full-voltage across-the-line magnetic reversing contactor is used for motor control. This is both mechanically and electrically interlocked, housed within a NEMA 1 enclosure integrated into the operator.

• Control Circuitry:
  Includes a transformer to step down control voltage to 24 VAC, with dedicated terminal strips for power supply and control device connections. The operator is pre-wired for an open/close/stop control station, with on-board control buttons for convenient servicing and adjustments.

• Drive Mechanism:
  The drive system uses a heavy-duty V-belt for primary reduction and a roller chain and sprocket setup for secondary reduction. A torque-limiting clutch helps prevent overload, while positive chain-driven rotary limit switches control door travel limits without being affected by manual operation or motor removal.

• Additional Features:

  • Spring-set, solenoid-released brake on 3/4 HP and 1 HP models

  • Manual disconnect arm for door operation during power failure

  • Drive shaft supported by oilite bearings, with a minimum diameter of 3/4”

Key Features

• Auto-detect monitored photo beam for easy installation

• Drawbar disconnect for manual door operation

• Mechanically self-locking heavy-duty V-belt and chain reduction

• Field-adjustable built-in functions

• Solid-state control circuitry with feedback LEDs

• On-board open/close/stop service buttons

• High starting torque motor with complete overload protection

• Available in 1/2 or 3/4 HP models

• Supports 115/230V single-phase or 230/460V three-phase power