What is the available voltage in the mains 220?

Question

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Hello.
Multi-apartment nine-story building. Please tell me, they say 242 volts is max. admissible. (ten%). But if this has already been going on for several days, is this normal or do I need to contact the management company? Which GOST and item should be referred to in the application?
And another question. Is it normal if the UPS outputs 240 volts?

Answer 1

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Answer 2

However, this is not a completely correct answer. At present, the standard voltage in the network in Russia is 230V, but 220V is valid for electricity suppliers. Indeed, earlier in the Soviet Union the standard voltage was 220V, but later decisions were made to switch to the pan-European standard - 230V. According to the requirements of the interstate standard GOST 29322-92, the mains voltage should be 230V at a frequency of 50 Hz. The transition to this voltage standard was to be completed in 2003. GOST 30804.4.30-2013 also mentions the need for measurements at a standard voltage of 230V. GOST 29322-2014 defines a standard voltage of 230V with the ability to use 220V. Power grids supply electricity in accordance with the current GOST 32144-2013,
Caution sign 230V, voltage 230 volts
A change in the standard voltage value has been made to fully comply with European power quality standards. Of all the former republics of the USSR, Russia, Ukraine, and the Baltic countries have switched to the 230V standard.
At the same time, it should be understood that electrical equipment manufactured in Russia and for Russia should work normally both at a voltage of 220V and at a voltage of 230V. For devices, as a rule, the voltage range is set from -15% to +10% of the nominal voltage.
220 + 10% = 242V
230 + 10% = 253V
In general, nothing will happen, normal devices are calculated with a margin of 25% in voltage.
Plus, this is not a precision technique, so your sensor may be lying by 5-8%

Answer 3

there is a guest everything else is bullshit.
GOST 29322-2014 (IEC 60038:2009) Standard voltages
50 Hz 230 V +- 10% = 207 ... 253 volts