25.8kV 27kV 33kV ONAN Earthing Transformer

A "Pyramid" Security Assurance System for Power Supply Safety in High-Risk Explosive EnvironmentsCore Focus: Targeting high-risk scenarios such as petrochemical, coal chemical, and dust explosion-prone sites, this solution develops dedicated earthing transformers compliant with international explosion-proof ratings (e.g., Exd IIC T4) through four key dimensions: explosion-proof structural design (flameproof/ increased-safety types), explosion-proof material selection, spark suppression technolog

Reliable Operation Across Alpine, High-Temperature, High-Humidity and Salt-Fog Scenarios1. Global Environmental Challenge Map: Pain Points and Risk DistributionIndustrial projects are spread across extreme environments worldwide. Conventional earthing transformers are prone to fatal failures such as insulation cracking, heat dissipation malfunction, and metal corrosion in the following scenarios:Extreme EnvironmentRepresentative RegionsCore ChallengesPotential Failure RisksAlpine Polar RegionsRu

1. Background and Global Pain PointsIn numerous industrial plants worldwide with earthing transformers in operation for over 15 years, the equipment commonly faces the following challenges:Equipment Aging: Insulating oil degradation, multi-point earthing of iron cores, local overheating of windings, leading to increased failure rates.Low Energy Efficiency: No-load and load losses exceed the efficiency benchmarks specified in IEC 60076-1 / IEC 61869, resulting in high long-term electricity costs.

1. Background and Pain PointsIn industrial power grids (especially underground coal mines, rail transit traction power supply systems, and metallurgical plants), distribution networks mostly adopt neutral point ungrounded or arc suppression coil grounded modes. When a single-phase earth fault occurs, the following problems arise:Excessive zero-sequence capacitive current: Electric arcs are difficult to extinguish spontaneously and may easily develop into phase-to-phase short circuits.Response la

A New Industrial Power Quality Governance Model Based on "Problem Link Mapping + Three-Dimensional Collaborative Architecture"Core Focus: In industrial production, impact loads such as motor start-stop and arc furnace operation can trigger voltage sags, while earth faults lead to zero-sequence harmonics and three-phase imbalance, thereby degrading power quality. This solution realizes collaborative operation between earthing transformers, Static Var Generators (SVG) and Active Power Filters (APF