PowerMaster Model GT Heavy Duty Drawbar Operator for Standard Lift Sectional Doors

PowerMaster Model GT Drawbar Operator for Sectional Doors

The PowerMaster Model GT Drawbar Operator is a high-performance solution designed for standard lift sectional doors. Built for industrial environments, it features a high starting torque, continuous duty motor engineered for longevity and protected by a current-sensing or thermal overload system.

The primary drive reduction uses a heavy-duty gearbox operating in an oil bath for consistent, low-maintenance performance. Electrical control is handled by a full-voltage magnetic reversing contactor, both electrically and mechanically interlocked, ensuring precise and reliable motor control. All components are securely housed within a NEMA 1-rated enclosure, with dedicated terminal strips for simplified power and control wiring.

The system includes a 24 VAC control voltage transformer and is pre-wired for Open/Close/Stop functionality. On single-phase models, a smart control circuit enables instant reverse operation. Rotary-type limit switches control the open and close range, and their settings remain unaffected by motor removal or manual door operation.

An adjustable torque-limiting clutch safeguards the system from overloads, while a disconnect arm allows manual door operation in case of power loss. The integrated spring-set, solenoid-released brake adds another layer of safety and reliability. Final drive is achieved using industrial-grade roller chains and sprockets, supported by oilite bearings and a durable ¾” diameter drive shaft.

Key Features

• Industrial-rated worm gear drawbar operator

• Auto-detect monitored photo beam for easy setup

• Solid state circuitry with status LEDs

• Field-adjustable built-in functions

• Onboard Open/Close/Stop buttons for testing

• High torque motor with full overload protection

• Quick-release arm for manual use

• Available in ½, ¾, and 1 HP models

• Voltage options: 115/230V single-phase or 230/460V three-phase