Method and apparatus for automatic abnormal events monitor in operating plants
Control unit for oil wells
Method of avoiding abnormal combination in an internal combination engine and an arrangement for carrying out the method
Control apparatus and method for an oil-well pump assembly
Vibration sensor and electrical power shut off device
Compressor surge counter
Fail safe dynamoelectric machine bearing
ApplicationNo. 853864 filed on 05/09/1997
US Classes:417/18, Single motor control element responsive to means sensing diverse conditions417/32, Responsive to pump or pump fluid temperature417/44.1By control of electric or magnetic drive motor
ExaminersPrimary: Freay, Charles G.
Assistant: Evora, Robert Z.
Attorney, Agent or Firm
International ClassF04B 049/00
AbstractA protection system for a scroll machine provides temperature, mis-wiring and vibrational protection for the scroll machine. The vibrational protection comprises a vibration sensor which is integrated on the circuit board of the protection system. The vibration sensor, in conjunction with at least one timer, monitors the vibrations of the scroll machine and will shut down the machine when excess vibrations are sensed over a prespecified period of time. The temperature system monitors operating temperature conditions and the mis-wiring system monitors the power supplied to the compressor. Once an undesirable characteristic is identified, the operation of the scroll machine is stopped. These protection systems are integrated into a single module which identifies the reason of shutting off the scroll machine in order to simplify repairs needed.