The difficulties and disadvantages in integration design of electronic current transformer and disconnecting circuit breaker are analyzed

the working principle and composition of fiber optic current transformer are introduced

and an idea of integration technology of fiber optic current transformer and disconnecting circuit breaker is presented. Combining product development practice

a design scheme

including the high voltage structure

insulation seal

and optic fiber insulation sleeve at the primary side

as well as the sampling unit’s seven-in-one box at the secondary side is discussed in detail. This scheme can realize high structure integration and function combination of fiber optic current transformer and disconnecting circuit breaker

give a solution to the above problems in integration design of current transformer and the disconnecting circuit breaker

and provide a technical reference for the integration of devices at primary side in an intelligent power station. In addition

electric field simulation with ANSYS and prototype test demonstrate that this integration design scheme neither weakens the high voltage insulation performance of the disconnecting circuit breaker

nor reduces the measurement accuracy of fiber optic current transformer

indicating the correctness and feasibility of this integration technology.