This, already 50 in a row, question with just such a title was asked by the reader Sergey. And I continue to publish for the "question-answer" section. Let me remind you that if you have your own answer to a question, then write it in the comments below. I and other readers will be happy to read it.
I quote the text of the question verbatim:
Hello! There is a single-phase generator gasoline Fubag BS 6600 A ES 6 kW. 3 phases enter the house. Will this generator work with a 3-phase automatic control unit Startmaster BS 6600 D 400V for gasoline stations BS 6600 DA ES FUBAG 838221, if you put on the generator input connection bus in the automation unit jumpers? Will it be possible thereby to deceive the 3-phase automation by connecting a single-phase generator to it?
I considered the issue and advised Sergey within the framework of my knowledge and qualifications as follows:
No, the Fubag BS 6600 A ES single-phase gasoline generator can work with the Startmaster BS 6600 230V single-phase automatic control unit. The design of the latter allows a single-phase generator to be connected to a single-phase electrical system. In this case, the automation unit functions as follows:
- In automatic mode, it continuously monitors the presence of voltage in the main source - an external distribution network. If a potential difference is present, this will be indicated by a control lamp.
- When a lack of voltage is detected in the electrical circuit, the Startmaster BS 6600 automation unit sends a control signal to start the gasoline generator.
- In case of a successful start of the gasoline generator, the operation control lamp lights up and indicates the supply of voltage from an independent source. The Startmaster BS 6600 automation unit constantly monitors the presence of the supply voltage at the output and checks the power supply from the "central network".
- After the supply voltage is restored in the electrical circuit, a control pulse is sent to turn off the generator. Which is taken out of service and disconnected from the electrical circuit.
If we consider this process in the format you described, then the Startmaster BS 6600 D automation unit for three-phase electrical system will not be able to control the presence of a three-phase voltage at the output from a single-phase generator. Therefore, it will turn off the Fubag BS 6600 A ES due to non-compliance with the three-phase mode, and shorting the terminals in this situation will not help in any way.