Zero-loss current limiting device

A zero-loss current limiting device is characterized in that an operation loop, a standby operation loop and a current limiting loop are connected in parallel; the operation loop is composed of a first handcart type vacuum circuit breaker (1), a first power assembly (VT1) and a first isolation switch (4). The first handcart type vacuum circuit breaker (1), the first power assembly (VT1) and the first isolation switch (4) are connected in series. The standby operation loop is composed of a second handcart type vacuum circuit breaker (5), a second power assembly (VT2) and a second isolation switch (8). The second handcart type vacuum circuit breaker (5), the second power assembly (VT2) and the second isolation switch (8) are connected in series. The current limiting loop is an air-core reactor (9); the operation loop and the standby operation loop are two same parallel loops which are standby for each other; when the power grid is normal, the current does not flow through the current-limiting air-core reactor (