Theory

Current transformers typically consist of a silicon steel ring core wound with many turns of copper wire. The conductor carrying the primary current is passed through the ring. The CT's primary, therefore, consists of a single 'turn'. The primary 'winding' may be a permanent part of the current transformer, i.e. a heavy copper bar to carry current through the core. Window-type current transformers (aka zero sequence current transformers, or ZSCT) are also common, which can have circuit cables run through the middle of an opening in the core to provide a single-turn primary winding. To assist accuracy, the primary conductor should be centered in the aperture.

Applications

LZCK2500-10 zero sequence current transformer is suitable for current measurement and microcomputer protection of electrical equipment in 10KV and 35KV AC power system. It is widely used in compact fully insulated ring network switchgears and cable distribution boxes. The current transformer can be directly installed at the inlet and outlet cables. The slice is imported silicon material.

Features

• New magnetic material with high magnetic permeability and low saturation magnetization.
• High stability and higher measuring accuracy with lower instrument security factor.
• Vacuum poured semicircular ring core and secondary windings using high-quality epoxide resin.
• Fire retardant plastic casing with moisture-proof and maintenance-free characteristics.
• Small size, light weight, and small footprint for easy installation in ring network switchgears.