When the flowing conditions are met, or the deviation is not big, the juxtaposition method of switching on the switches in power room is called quasi-synchronization juxtaposition.
1. The voltage of the juxtaposition switched is equal at both sides, the maximum allowable phase difference is with 20%.
2. The frequency of power supply at both sides of the juxtaposition switches is the same, it is generally regulated that the switches can be in juxtaposition if the frequency phase difference is 0.5Hz.
3. The phase angle of voltage at both sides of the juxtaposition switches is the same.
4. The phase sequence at both sides of the juxtaposition switches is the same.