| 摘要 |
An electrical warning system for malfunctions in refrigeration equipment driven by an electric motor (10) comprises a main resistor (14) connected in series with the motor (10) to cause only a small voltage drop in the power supply (11) to the motor (10), a high amp shunt across the main resistor (14) comprising a diode (16), resistor (18, 19) and light-emitting diode (21), and a low amp shunt across the main resistor (14) comprising a diode (24) and light-emitting diode (26) with the latter having in parallel a capacitor (30) as well resistor (28) in series with a Zener diode (29). |
