Description

This grounding transformer, suitable for systems up to 36kV, is a specialized electrical device. It creates an artificial neutral point in power grids, playing a crucial role in grounding protection. By effectively handling single - phase ground faults, it ensures the stable operation of medium - voltage power systems, whether in urban distribution networks or industrial power setups.

Feature

• Voltage Adaptability：Designed for up to 36kV systems, it matches the common voltage levels of medium - voltage power grids, ensuring wide - ranging applicability.

• Fault Handling：Efficiently suppresses arc - grounding overvoltages during single - phase ground faults. It helps reduce ground fault currents, minimizing damage to power grid equipment and enhancing system reliability.

• Robust Construction：Built with high - quality materials like premium magnetic cores and durable windings. The enclosure is sturdy, resisting harsh environmental factors such as moisture and dust, ensuring long - term stable performance.

• Safety Enhancement：Provides a reliable neutral grounding solution, preventing abnormal voltage fluctuations and equipment insulation damage, thus safeguarding the safety of the entire power grid and connected electrical devices.

Main technical parameter

Note: This parameter table is for reference. We can offer customize production tailored to client specifications.

Scope of Application

Suitable for scenarios with varying capacities and voltage levels.

• 35kV and Above Distribution Networks: Transformer windings typically adopt a star (Y) connection with an accessible neutral point, eliminating the need for grounding transformers.

• 6kV and 10kV Distribution Networks: Transformer windings mostly use delta (Δ) connections without accessible neutral points, requiring grounding transformers to provide a neutral point.

Special Scenarios: When system unbalanced voltage is high, Z-type transformers can meet measurement requirements through balanced design of their three-phase windings. When system unbalanced voltage is low (e.g., fully cable-based networks), the neutral point of Z-type transformers must generate an unbalanced voltage of 30-70V to satisfy measurement criteria.

Purpose and Function: Provides a return path for fault currents, ensuring safety and stability during ground faults.

Operating Principle During Faults: During a ground fault, fault current flows through the transformer’s neutral point. The counteracting magnetic flux generated by reverse current neutralizes impedance.

Voltage and Current Ratings: Rated voltage matches the system’s line voltage. Capable of withstanding maximum fault currents for up to 30 seconds.