江苏常胜电器股份有限公司坐落在常州市高新技术开发区，占地面积30000余平方米，建筑面积25000平方米，公司在常州和淮安有四家分公司。拥有固定资产超亿元，员工1200余人，其中专业技术和管理人员200余人。公司拥有日本引进的专业自动化生产设备50多套检测仪器20多套及国产生产检测设备400多套，主要生产17AM-D系列、BR-A系列、BR-B系列、8AMC系列、18AM系列电流温度型自动恢复保护器，BW系列、BR-B6D系 列温度型自动保护器、电机测速传感器、温度熔断器等产品。

Jiangsu Changsheng Electric Appliance Co., Ltd. is located in Changzhou High-tech Development Zone. It has a floor area of more than 30,000 square meters, a building area of 25,000 square meters, four branch companies in Changzhou and Huai’an respectively, a fixed capital of more than 100 million yuan and more than 1,200 staff, wherein there are more than 200 professional technicians and managers. The company has more than 50 sets of professional automatic production equipment and more than 20 sets of detecting instruments introduced from Japan, and more than 400 sets of home-made production and detection instruments. It mainly produces 17AM-D, BR-A, BR－B, 8AMC and 18AM current temperature type automatic recovery protectors, BW and BR-B6D temperature type automatic protectors, motor tacho-generators, temperature fuses, etc.

17AM-D系列热保护器是一种电流敏感性、温度感应保护装置，与马达线圈串联，保护器依据线圈温度及马达电流大小而变化，当温度、电流增高时所产生的热量传递到双金属元件上，达到预定动作温度设定值时，双金属元件便迅速动作，使触点断开，切断电路。当马达线圈的温度下降到该产品的额定复位温度值时，双金属元件又恢复到初始状态，动触点闭合，电路重新导通。

17AM-D series thermal protector is a current sensitive and temperature automatic response device. It is connected in series to the winding of motor. The protector changes with the temperature of winding and current of a motor. When the heat generated by the increasing temperature and current from the protected appliances transmits to double-metal element, and reaching the temperature value of scheduled movement, the double-metal element will move immediately so that the contact will be switched off and the circuit will be cut off. When the temperature of motor winding decreases to the rated temperature value of reposition, bimetal element will return to its initial state, the moving contact will be closed and the circuit will be on.