In power supply systems of the Russian houses commonly used single-phase AC voltage of 220 V, while the use of certain types of electrical equipment involves the need for a power source with voltage of 380 V. such equipment includes most wood - and metal-working machines used in agriculture for processing small parts.
To connect to the mains power supply is designed for operation from three-phase network 380 V, using special converters also known as inverters. Besides the main function, the Converter allows for a wide range to adjust the frequency of the engine, which significantly reduces the power consumption of equipment operating with a constant frequency. The principle of operation of the inverter is based on dual frequency conversion current and the formation of the output linear three-phase system voltages of 220 V.
Inverter design must include a protection system that eliminates the likelihood of overload at short-circuit amperage and protection from overheating. The modern model of the converters provide smooth start of the engine, in which the growth of the starting voltage occurs at a constant value to its relationship to the phase current.
Weight and dimensions of the inverters easily allow for their transfer. The main drawback of the application of the Converter is high enough, the cost of the device, so its purchase the infrequent use of three-phase equipment may be impractical.
Another method of obtaining the voltage source is a 380 V 3 phases from the power source with a voltage of 220 V. In city apartment buildings, this method requires prior approval from the organization that conducts the power company.
If there is a possibility of connecting equipment to a three phase power distribution panel, a voltage conversion may not be necessary. In apartment buildings distribution Board for each entrance, so the only technical means to implement this type of connection is three-phase extension cord.
Getting a power source with voltage of 380 V with the Converter
To connect to the mains power supply is designed for operation from three-phase network 380 V, using special converters also known as inverters. Besides the main function, the Converter allows for a wide range to adjust the frequency of the engine, which significantly reduces the power consumption of equipment operating with a constant frequency. The principle of operation of the inverter is based on dual frequency conversion current and the formation of the output linear three-phase system voltages of 220 V.
Inverter design must include a protection system that eliminates the likelihood of overload at short-circuit amperage and protection from overheating. The modern model of the converters provide smooth start of the engine, in which the growth of the starting voltage occurs at a constant value to its relationship to the phase current.
Weight and dimensions of the inverters easily allow for their transfer. The main drawback of the application of the Converter is high enough, the cost of the device, so its purchase the infrequent use of three-phase equipment may be impractical.
Alternative connection methods
Another method of obtaining the voltage source is a 380 V 3 phases from the power source with a voltage of 220 V. In city apartment buildings, this method requires prior approval from the organization that conducts the power company.
If there is a possibility of connecting equipment to a three phase power distribution panel, a voltage conversion may not be necessary. In apartment buildings distribution Board for each entrance, so the only technical means to implement this type of connection is three-phase extension cord.