It mainly includes ASN-ATC series medium-voltage power supply conversion system (automatic switching and stepwise switch system), which is equipped with electrical + mechanical interlocking, self-operation and self-recovery, self-operation and non-self-recovery switching functions.EATC series low-voltage CB power conversion system, including the systems of 2 power supplies, 3 power supplies, 2 incoming lines and 1 busbars.Electrical + mechanical interlocking function is also available.Self-operation and self-recovery, self-operation and non-self-recovery switching functions are available.EATS series low-voltage PC power supply conversion system includes II position and III position and has the functions of self-operation and self-recovery, self-operation and non-self-recovery switching.