A low-pressure induction motor protective relay for power saving standby

摘要

The subject innovation is part of the output of the rectifier (1) which is installed to supply power for operating the functions of all circuits in the subject innovation relates to a low-pressure induction motor protective relay for standby power saving is a change-over switch (8) via display for the standby light 3 and is supplied to the standby control circuit (2), the change-over switch (8) when the standby control circuit (2) is a current transformer (5) flowing in the load is detected, and so on-off, conventional infrared sensor 7, the switch 9 via the central control circuit 4 by the on-off by the display device 10 and the latch relay (11, for sensing the approach of the operator during standby ) to and to the movable stand-by state, when detecting the current flowing in the load by the current transformer 5 is the switch for inputting a set point protection value of the relay itself (by UP, DN switch), the first input signal and the infrared sensor the driver Switched by the root check via the standby control circuit 2 the switch 8 is on-off the lights (3) has switches (9, via off and the central control circuit (4) the said commutation power pending ) to the on or off to drive the display device 10 and the latch relay 11 is adapted to control the power flowing to the load. Normal time as described above, is characterized in that light (3) is only that the only power source is less than a negligible 1W power consumed in the air is consumed due to the lighting.