Zhaowei Machinery & Electronics Co., Ltd.

Micro Auto Reclosing Motor Parameters

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An automatic reclosing functions as a protection of miniature circuit breakers. The automatic device automatically switches the circuit breaker off when faults cause the breaker to trip. Its application can improve the breaking and overcurrent capacity of the power supply system, thus protecting the continuity and quality of power supply. It is mainly used in industrial, commercial, high-rise buildings, residences, and other buildings with stable and reliable operation.

The small reclosing motor is a kind of miniature gear motor used in circuit switches of electrical equipment, whose main transmission structure is assembled by a drive motor (micro motor) and a planetary gearhead (reducer). Different application fields of reclosers require different technical parameters of gear motors. Therefore, the drive motor can adopt a DC motor, brushed motor, BLDC motor, stepper motor, or coreless motor as the drive source, while the micro gearbox can adopt a planetary gearhead, cylindrical gearhead, worm gearhead, or other common gearheads as the reducer. The technical parameters are often customized for development including the output speed, power, voltage, current, gear ratio, torque, diameter, and gear material. ZHAOWEI provides a variety of customized gear motors to choose from.

Parameters of Micro Gear Motors for Auto Reclosing:

Material Plastic
Outer diameter 10mm
Operating temperature -20℃~+85℃
Direction of rotation cw&ccw
Gear backlash ≤3°
Voltage (Optional) 3V~24V
Bearing Porous bearing/Rolling bearing
Input speed ≤30000rpm
Axial endplay ≤0.3mm/≤0.2mm
Current 150mA max
Radial load on output shaft ≤1N/≤7N
Motors (Optional) Stepper/Brushed DC/BLDC Motor

Intelligent Automatic Reclosing Gearbox

Project Name: Intelligent Automatic Reclosing Gearbox

Project Introduction: The gearbox solution for automatic reclosing (miniature circuit breaker) adopts a helical worm gear multi-drive design, adjusts the transmission structure of automatic reclosing, optimizes its service life and performance, and fulfills the switching and closing of the intelligent circuit breaker. The intelligent reclosing device (circuit breaker gear motor) is used as an effective anti-accident measure on overhead transmission and power lines, except the process of cable transmission and power supply. When a circuit fault occurs, and relay protection causes the circuit breaker to trip, the automatic reclosing device causes the circuit breaker to close again after a short period, improving the reliability of power supply in the power system.

Achievement: The small PV grid-connected auto reclosing gearbox developed and designed by ZHAOWEI, focuses on electrical and mechanical service life, which avoids Intermittent voltage faults in distributed PV-generation, and enhances the continuity of receiving electricity.

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