Kāpēc dara a multimetrs tikai rāda 107V kad mērīšana 220V spriegums?
In this case, the power should be cut off to investigate the cause. You can test it at other people's homes to see if it's normal. Normally it should be around 200 volts to 240 volts. The peak value during summer irrigation in rural areas can be as low as about 160 volts. This is due to the power supply system. If other people's homes are normal, but one's own home or one of the channels is abnormal, then there is a fault and it should be rectified before power is supplied. To prevent fire damage and electrical accidents. Focus on checking in detail whether there are poor contacts, electrical faults, electrical heavy-duty wires that are too thin and overloaded, etc. It's best to ask an electrician to help troubleshoot. To prevent the malfunction from causing damage to people and property.
Pirmais, the external line may be broken due to the neutral line. Second, you can use an electric pen to measure the light and darkness to judge. The internal battery of the third multimeter is insufficient. Use another multimeter for comparison!
First of all, is it possible to use the same multimeter to measure the starting voltage on single-phase line A of the same main power supply to be 220V, but to measure the starting voltage on single-phase line B to be 107V? , the second question is whether the voltage measured with the same multimeter at the beginning of single-phase line A is 220V, and the voltage measured at its end is 107V?
Ja tas tas pats multimetrs ir lietots mērs vienfāzes līnija A of tas tas pats main jauda padeve, the izmērīts sākums spriegums is 220V, un mērāmais spriegums of vienfāzes līnija B is 107V; tad augšējā un apakšējie gali of the ķēde pārtraucējs (slēdzis) of vienfāzes līnija B are attiecīgi Divi elektroinstalācija punkti būtu būtu slikts kontakts sakarā oksidācija, rezultāts in an palielinājums kontakts pretestība un a spriegums piliens.
Ja tas tas pats multimetrs ir lietots mērs vienfāzes līnija A or vienfāze līnija B ar tas tas pats jauda padeve, un mērītais sākums beigas spriegums ir ir 220V, un mērītais beigas spriegums is 107V, tad it vajadzētu būt tas līnija ar the mērīts gals spriegums of 107V ir pārāk garš vai līnija on līnija līnija līnija ir pārāk gara. Slodze strāva ir lielāks nekā drošs nesējs jauda of līnija vadītāji, rezultāts in a spriegums kritums.
Ja spriegums mērīts at sākums of vienfāzes līnijas A un B of the same power supply is 107V, tad it vajadzētu būt ka jauda of the distribution transformators in the low-voltage distribution station area is daudz mazāks nekā jauda patēriņš jauda of lietotājs, or tas izplatījums transformators The distribution line from the user is too long and has too little voltage drop.
