Slip ring brushes and the oxide film

According to statistics, three relay pump operation has been burned eight switches. Collector ring temperature: brushless slip ring oxide film generally easier to form at about 70 ℃, when the collector rings, brushes overheating failure, usually at temperatures above 150 ℃, then even if the new ones brush, the oxide film is not easy to form, can not play the role of lubrication, brush wear will increase, resulting in the temperature continues to rise, become a vicious cycle. slip rings then you can take the external forcing cooling methods, such as Vaseline, high-power fan ventilation and other means, so that the collector loop temperature falls within the normal range for some time, so that the brush surface oxide film formed gradually make it into the virtuous circle. In addition, the rotor via a resistor, you can also speed. Compared with squirrel-cage motor, the motor is characterized by its complex structure, high cost, convenient operation and maintenance, maintenance workload. Collector ring pump relay switch model DW15-C630 type, Wind Turbine Slip Rings rated current of 630A instantaneous stop 6300A, switching arc chute mutually insulated copper steel composition, arc performance is poor, relay pump the start and stop time will be in high temperature electric arc generated between the switch contacts, frequent start-term high-temperature heat generated by the arc degree of oxidation of the contacts increase, the contact resistance between the contacts increases, the main contacts of the switch firing sticky, damaged, or even cause the switch to an explosion, causing expansion of the accident.

Electronics Co., Ltd. Shenzhen Jing Pei
Manufacturing Center:
Bao'an District, Shenzhen, Guangdong Huaxing Road, Dalang Street, No. 153, Pei Jing Science Park
Sales Center:
Shenzhen, Guangdong Province, No. 7008 Shennan Road, Futian District, Ginza International (Sunshine Golf Building) Room 1902-1903
Sales Line:
0755-33359750 / 29534903/29534759
Fax 0755 -33,359,758
Email: sales@slipring.cn