The PowerMaster 21-31000 CT-71 NEMA 4 Modified Operator is a robust, industrial-grade door operator engineered for commercial and industrial overhead doors requiring durability, moisture protection, and high performance. Equipped with a 3/4HP, single-phase motor, the CT-71 provides reliable torque and smooth operation for rolling steel doors, sectional doors, and high-cycle commercial applications.
The NEMA 4 modified enclosure protects the internal components from water spray, humidity, dust, and corrosive elements, making this operator ideal for car washes, exterior installations, food-processing facilities, agricultural environments, and chemical or harsh industrial sites.
Constructed with precision gear reduction, heavy-duty components, and compatibility with modern access control and safety systems, the CT-71 ensures consistent operation, long service life, and minimal maintenance. It supports accessories including monitored photo eyes, safety edges, radio receivers, wireless keypads, timers, and automation modules.
