Title :
Motor Protection for Valve Actuators
Author :
Payne, H.B., Jr.
Author_Institution :
Lynn Elliott Company, Inc., Missouri City, TX 77459.
Abstract :
Valve actuator motors as a category have never really been defined by NEMA, NEC, or any other group. Moreover, NEC Section 430-33 states that intermittent-duty motors need not have motor protection. As a result, the decision to protect motors and the selection of protector type are both left to the specifying engineer or the manufacturer. A guideline is presented to help the engineer and the manufacturer make both decisions. Our recommendations are based on field experience confirmed by laboratory testing.
Keywords :
Actuators; Chemical industry; Guidelines; Maintenance engineering; Manufacturing; National electric code; Petroleum; Protection; Torque; Valves;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.1978.4503484
