| 摘要 |
PURPOSE:To reduce the size of and to enhance the reliability of the controlling device for an electric equipment by integrating a variety of protection relays required for controlling the equipment in a unit and forming a control relay. CONSTITUTION:A control relay 31 formed by integrating a variety of protection relays in a unit has a control mode terminal 31t connected to the predetermined control mode switch 32. In the control relay 31 are provided an overcurrent detector 35 for converting the overcurrent of a main circuit detected by a detector 8 into an internal signal level, a leakage detector 36 for converting the leakage current of the main circuit by detecting into an internal signal level, an instantaneous power interruption detector 37 for converting the presence or absence of the voltage of the main circuit by detecting into an internal signal level, a signal detector 38 for detecting the operation of the respective start or stop operation switches to convert it into an internal signal level, a signal processor 40 for synthesizing the detection signals of the respective detectors and the output from an input unit 44 to produce an output signal, a display output unit 41 for producing a lighting output in accordance with the output from the processor 40, an output unit 42 for driving the coil of a solenoid switch 3 in accordance with the output signal from the processor 40, and an input unit 40 of a control mode changeover switch 32 for converting the function of the processor 40 externally. |
