Extreme weather frequently "tortures" transformers: I need to have my license checked!

What fatal problems will a substandard transformer expose in extreme weather?

Cutting corners on insulation materials will cause a short circuit in an instant. Inferior insulation materials have low heat resistance and poor mechanical strength, making them prone to breakdown under voltage fluctuations or sudden current surges, instantly generating an electric arc. This can lead to anything from power outages to fires.

Overload capacity falsely advertised, these transformers are the first to fail in hot weather. During peak summer electricity demand, loads surge, and substandard transformers, advertised as capable of handling 100% load, often overheat and leak oil at 80%. For every 10°C increase in oil temperature, the insulation lifespan is halved.

Inadequate sealing design turns transformers into "waterfall caves" during heavy rain. Rainwater seeps into the transformer's interior, causing excessive moisture content in the insulating oil and a sharp decline in insulation strength. After a downpour, a substandard transformer becomes a "waterlogged vehicle"—it may look fine on the outside, but it's completely ruined inside.

Inadequate anti-corrosion treatment will result in rust penetration within three years. Coastal salt spray, industrial corrosion, and humid climates—transformers without robust anti-corrosion technology will experience casing rust, radiator blockage, and aging and cracking of sealing strips in less than three years.

The lack of critical protection renders a transformer unusable after a lightning strike. Substandard transformer surge arresters and overvoltage protection devices, often made with inferior materials and substandard workmanship, are the first to be damaged by lightning surges.

A substandard transformer may save a little money, but it sows the seeds of future problems. Conversely, how should a transformer that can truly withstand the "torture" of extreme weather be manufactured?

Safety First: Insulation Materials

It features flame retardant self-extinguishing, non-toxic and environmentally friendly properties, and moisture and stain resistance. While the industry standard for H-class insulation is 180℃, Zisheng Electric's 220℃ insulation offers greater overload margin and stronger short-circuit resistance, meeting the wide temperature range operation requirements from the Gobi Desert to the polar regions.

The second safety measure: winding conductors

Zisheng Electric's high-voltage winding conductors are made of high-quality conductors and cast under vacuum, with a partial discharge level of <5pC. Partial discharge is one of the main culprits of transformer insulation aging, and 5pC is far below the industry standard requirement, meaning a cleaner insulation system and a longer lifespan.

The third safety measure: sealing and waterproofing

Zisheng Electric's 110kV oil-immersed transformers utilize a one-piece molding technology for all seals, eliminating the risk of aging at the joints of traditional seals. Furthermore, triple leak testing—fluorescent, positive pressure, and negative pressure—ensures zero leakage.

The fully sealed vacuum oil injection technology achieves low partial discharge, zero leakage, and long service life, ensuring that the transformer remains stable even in heavy rain.

The fourth safety barrier: corrosion resistance and weather resistance

Taking hydrogen production rectifier transformers as an example—high-strength alloy steel combined with a multi-layer anti-corrosion coating process provides both pressure resistance, weather resistance, and long-term corrosion protection. This ensures the equipment remains rock-solid even in harsh environments such as polar regions, oceans, and industrial parks.

Zisheng Electric's first set of SFFZ-140000/115kV oil-immersed power transformers for extremely cold regions has successfully rolled off the production line. The product has passed sinusoidal sweep frequency vibration testing and can withstand the impact of reciprocating waves, resisting the instantaneous impact stress caused by the undulation of the buoy. From the initial design stage, it was designed for extreme environments such as polar regions and oceans.

The fifth level of safety: short circuit resistance and protection

Zisheng Electric's windings employ an integrated assembly and clamping process to ensure assembly precision and industry-leading short-circuit withstand capability. It's not that they're immune to short circuits, but rather that they're not afraid of short circuits even when they do occur.

From insulation to conductor, from sealing to corrosion protection, every hard-won skill in the first four stages ultimately converges into the ultimate capability of the fifth stage—standing firm and withstanding extreme weather.