Zero Phase/Residual CT Amorphous Nanocrystalline Current Transformers

Only few typical products of this series are shown in the following pages. EHC is capable of making other customized design and manufacturing per user request.

Specifications and Parameters：

Dimension table：

EHC-ZCT106	EHC-ZCT160/250/630

Principle of Operation：

The wiring and principle of zero sequence current transformer are shown in Figure 2. Zb is the coil impedance of the actuator and Rb is the sampling resistance of the secondary of the transformer. When leakage current or zero sequence current is generated, a current Io flows through the coil of the actuator, which may directly generate an electromagnetic force to make the actuator act; Or through the sampling resistance, a voltage signal Vb is generated as the input signal of the microelectronic circuit, and the actuator is driven by the electronic amplification circuit.

Figure 2