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Generally the precise instruments are sensitive to the voltage. In all distribution system accidents, voltage dip and short duration break accounts for 70%-80%. But in the electricity transmission accidents, it accounts for more than 96%. Voltage dip and short duration break problems are serious for many enterprises. Solid-state Complex Switched (SSTS) can effectively solve such problems.

The precision instruments are sensitive to the voltage. In all power distribution incidents, voltage drop and short interruption incidents account for 70%-80%. . In the transmission incidents, the voltage drop and short interruption incidents account for more than 96%. These problems have a serious impact on many industries. The solid-state transfer switch (SSTS) can solve such problems.

Voltage drop means that the EMS of load voltage drops between 10%~90% of rated values, the duration time is 0.5 cycle to 1 minute. The voltage short interruption means that the load voltage EMS is lower than 10% and the duration time is less than 1 minute. As the economy develops in China, the electricity load structure changes and the load sensitive to voltage drop and voltage short interruption becomes more. SSTS can effectively solve this problem.