Differential ground fault protection system专利检索-差动电流互感器变压器和转换设备专利检索查询-专利查询网

Differential ground fault protection system

阅读：133发布：2022-04-01

专利汇可以提供Differential ground fault protection system专利检索，专利查询，专利分析的服务。并且A ground fault protection system using a differential current transformer. So that an inadvertent low impedance ground of the grounded neutral conductor on the load side of a differential transformer will cause a tripping potential to be developed across the secondary winding of the differential transformer, a resistor is connected across the load conductors at the transformer.，下面是Differential ground fault protection system专利的具体信息内容。

权利要求

1. A ground fault protection system for interposition in an electric supply system having first and second conductors extending from a source of alternating current to terminals connectible to a load, said first conductor being normally grounded on a source side of the ground fault protection system, said ground fault protection system comprising differential transformer means having a first primary winding connected in series with said first conductor and having a second primary winding connected in series with said second conductor, circuit interrupting means responsive to an unbalanced current flow of a predetermined differential value in said primary windings to interrupt the circuit through said second conductor, said conductors being respectively connected without added impedance between said primary windings and said Terminals, and means permanently connected solely and directly to said first and second conductors on a load side of said primary windings at points between said primary windings and said terminals, said permanently connected means having a constant impedance of a value such that a current approximately equal to said predetermined differential value of unbalanced current flows therethrough and through said primary windings, whereby the occurrence of a ground on the first conductor on the load side of said first primary winding diverts a portion of the current flowing through said permanently connected means around the first primary winding to said source to establish an unbalance in said primary windings regardless of whether a load is connected to said terminals.

2. A system as in claim 1 wherein the permanently connected means is a resistor.

3. A system as in claim 1 wherein the permanently connected means is a capacitor.

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Differential ground fault protection system

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