DEVICE FOR CONTROL OF THREE- AND ONE-PHASE LOADS THROUGH POWER FOUR-WIRE MAINS

摘要

FIELD: electricity.SUBSTANCE: invention is related to the field of electric engineering and, in particular, to control of pump units and can be used for alternate control of three- and one-phase loads through the power four-wire mains. The device contains at the power line input a protective device, a three-phase solenoid starter connected to the three-phase load connected at the line end and three wye-connected capacitors with an artificial earthing point are connected to the outputs of the starter; at the line beginning there is an ambient temperature sensor connected to a one-phase solenoid starter which contact is connected in parallel to one phase of the three-phase solenoid starter and at the line ending there is a heater switched on between a neutral wire and the artificial earthing point of three capacitors.EFFECT: possibility of skipping control cable during layout, refusal from switching devices in harmful environment.1 dwg