Patent Number
ZL 98 2 27909.4 ZL 00 2 41104.0
Introduction
Adopting the patented technology, Changzhou New Zone Desheng Electric Appliance Co., Ltd has developed the BR-B heat protector series, which are widely applied to the protection of plastic sealed motors of industrial and household appliance and other electric equipment. The series can effectively and reliably guard against the damage caused by overflow and overheat. The shell is made from heat resistant and heat conductive PBT engineering plastic. The product is applicable to the externally installed plastic sealed motors and household electric appliance.
Structure and Theory of Protection
BR-B type heat protector series is composed by heat conductive plastic shell, double metal component with welded silver alloy contact, current conductive frame, insulated fixing seat, static contact pad and heat resistant wires etc. The fully enclosed structure can prevent the protector from dust or impurity pollution and the damage caused by external force. It is highly electricity resistant, safe and easy to install as its shell is made from PBT engineering plastic.
When the current goes through the double metal component with impedance, if the current increases or the environment temperature rises and the temperature reaches the preset value, the double metal component will work and release the contact to shut off the circuit; and by contrast, if the device cools down to the safe temperature, the contact point will close automatically to restore the normal work state.
Applications
BR-B series protectors are double sensitive to current and temperature and are widely applicable to the overheat protection of single phase electric motors caused by overload and blocked running. Moreover, the protectors are also applicable to the overheat protection and temperature control of normal electric equipment such as lights, batteries, vacuum cleaners, PC boards and transformers etc.