Single Phase High Current Residual Zero Sequence Current Transformer

The LMZK Series Current Transformer is a highly versatile and compact transformer that is ideal for use in compact fully insulated ring network switch cabinets. It is renowned for its ease of installation and compatibility with RTUs and FTUs, providing reliable data support to the entire system. This transformer can be easily attached to the incoming and outgoing cable without the need for any specialized equipment or tools.

This transformer is highly effective in providing zero-sequence protection against over-current events, with a detection accuracy that is unparalleled, even in the harshest of environments. It has been widely used in various compact fully insulated ring network switch cabinets such as SafeRing/Plus, Uniswitch, RM6/SM6, SVS, GA/GE, FB, SS, and others. It is also compatible with combinatorial transformer substations and cable junction boxes.

The LMZK series transformer uses high-quality imported silicon steel sheets as the magnetic material because of their high magnetic permeability and low magnetic loss. It has a half-loop circular iron core and secondary winding that is vacuum filled with premium quality epoxy resin inside a flame-retardant plastic shell. This ensures that the transformer is not affected by moisture, maintains long-term stability, and requires very little maintenance. During installation, the two halves of the transformer can be easily fastened onto the outgoing cables using clamping hoops made from high-quality stainless steel. This provides a secure and reliable connection, even with 35mm2-400mm2 10KV cables.

The LMZK series current transformer is designed to work in cohesion with relay protection systems. This transformer is capable of providing signals to these systems to help detect current overloads, short circuits, and other fault conditions that may arise in the power network. This is what makes it an integral component for safeguarding power systems and ensuring their continuous operation.

In terms of protection, micro-current transformers for protection have very different working conditions from measurement transformers. These transformers only start to work effectively when the current is several times or dozens of times larger than normal current circulation. Therefore, the acceptable conditions for the transformer include being insulation sound, having a large enough accurate limiting coefficient and thermal and dynamic stability.

The LMZK series current transformer is highly accurate, with sensing capabilities that can detect even the most minute changes in current. It has a high insulation reliability and accuracy, providing consistent and precise measurements in every application. The transformer is also remarkably stable and efficient, making it ideal for use in power systems across a range of different environments.

In conclusion, the LMZK series current transformer is a highly effective solution for safeguarding power systems from zero-sequence over-current events. Its exceptional durability, accuracy, and versatility make it an ideal choice for use in a wide range of different applications. Its compact size and ease of installation ensure that it is a cost-effective and accessible solution for any power system in need of zero-sequence protection.