Introduction
VKE fully sealed oil immersed distribution transformer has become a preferred choice for current power distribution networks because of its high efficiency, energy-saving performance and reliable operation. The key components include the core, windings, oil tank and bushings.
The core adopts a stepped lamination process to reduce magnetic reluctance.
The windings feature a multi-layer cylindrical structure, with the high-voltage side using a tap changer (±5% tapping range) to adapt to grid fluctuations.
The oil tank is quipped with a gas relay and pressure relief valve - when an arc or overheating occurs due to an internal fault, they can trigger an alarm or trip protection.
The bushings, typically made of porcelain or composite materials, safely route the high and low voltage leads while providing insulation.
Key components of the fully sealed oil immersed distribution transformer.
Performance Advantages
A vacuum oil filling process is employed to remove moisture during encapsulation. After sealing, the transformer oil is completely isolated from the air, thus preventing materials aging caused by oxygen and moisture ingress.
The oil tank features corrugated fins for heat dissipation. These fins provide a cooling function and also act as a breathing mechanism. Their elasticity compensates for oil volume changes due to temperature fluctuations.
The pressure relief valve activates to vent abnormal internal pressure caused by overloads or faults, then reseals automatically when pressure normalizes. This protective device guarantees the safe operation of the fully sealed oil immersed distribution transformer.
A technician is installing the transformer's bushings.
Maintenance Guidance
To ensure long-term stable operation of the transformer, the following periodic maintenance is required:
-Sample and analyze the oil every 2 years to check moisture content, acid value and dielectric strength.
-Clean bushings to prevent dust accumulation, which could lead to creepage discharge.
-Inspect fasteners to avoid loosening of bolts caused by vibration
A quality inspector is conducting short-circuit impedance test.
Application Benefits
Safety-focused scenarios - hospitals, schools, shopping malls
-No Oil Leakage: fully enclosed design eliminates oil leakage risks, suitable for high-traffic areas.
-Superior Adaptability: the transformer operates stably whether in damp basement environments or facing sudden outdoor temperature changes
Cost-sensitive clients - factories, real estates
-Save on electricity costs: optimally designed core and windings consume 15%+ less energy than standard models.
-Save on maintenance: the sealing technology prevents moisture and dust ingress, resulting in almost zero upkeep during lifespan.
-Save on space: no external conservator cuts installation space by 30%.
