Complete set of neutral point equipment for transformers

The BZFZ-110/220 series main transformer neutral point complete set device is mainly used in 110kV/220kV substations, and its main function is to protect the neutral point overvoltage of ungrounded transformers in 110kV/220kV effectively grounded power grids.

Gap electrode discharge protection function: When the neutral point of the transformer experiences overvoltage and the overvoltage value exceeds the gap discharge voltage value, gap discharge occurs. The discharge arc grounds the neutral point of the transformer, transforming the partially ungrounded power grid into an effectively grounded power grid with arc grounding. Not only does it protect the safety of the neutral point insulation of transformers in case of accidents, but it also effectively protects the safety of other online equipment in the power grid.

The current measurement function of the gap discharge circuit is set in the current transformer in the gap discharge circuit, reflecting the magnitude of the discharge current. The relay protection device can use this current signal to quickly disconnect the transformer from the power grid if necessary.

The BZFZ series rod gap is made of R=8mm hemispherical stainless steel or copper rod, with a mirror polished surface.

Adjustable range of gap distance

BZFZ-110:90-175mm (standard model) BZFZ-220:250-400mm (standard model)

Power frequency discharge voltage range (effective value, 0 altitude)

BZFZ-110:50-63kV adjustable BZFZ-220:100-127kV adjustable