The S11-M series ring-type iron core distribution transformer is characterized in that the iron core of the ring-type iron core transformer is made of special equipment, and the silicon steel sheet is wound into a three-phase three-core column, the iron core has no gap, no joint, and the transformer coil is adopted. The patented equipment is wound on a closed core. The whole transformer achieves the purpose of energy saving, consumption reduction and environmental protection. It has the following outstanding features: 1. The no-load loss is 20-35% lower than S9, and the energy saving effect is remarkable; 2. The no-load current is 70-85% lower than S9, which improves the power supply quality of the power grid and reduces the line loss. 3. The noise level is reduced to 30-45DB, which effectively eliminates noise pollution. 4. Super overload capability; 5 Since the core structure is reasonable, the loss is small, and the current is small, the temperature rise of the transformer is very low. The performance and characteristics of the S11-M series ring core distribution transformer meet the requirements of the industrial policy of China's electrical industry, and comply with the technical policy and equipment policy of the power industry, especially suitable for the load characteristics of the rural network. It can be used as one of the preferred models for urban and rural power grid construction and renovation projects and other power distribution projects.
S11-M series distribution transformer structure:
1 Iron core: adopts three-phase three-column inner and outer frame rolling structure, the heart column is multi-stage stepped circular section; the core is rolled and vacuum-annealed to remove stress; the groove-shaped bending clamp, pull screw tightens the body; The surface is coated with special glue to ensure that the core is not deformed or rusted.
2 Winding and body: Four or two-layer cylindrical (500kVA and below) or spiral (630kVA and above) windings with low-voltage windings of 1~6 wires; wires are drawn with oxygen-free copper; high and low voltage The insulation between the winding layers is rhombic adhesive tape; the main airway oil gap between the high pressure and low pressure of the high pressure winding is the struts; the iron yoke insulation and the trapezoidal spacer are integrated to make the body evenly pressed; The body adopts a new hanging plate positioning structure, which is positioned longitudinally and laterally to ensure that the body is stable and not displaced.
3 Fuel tank: Corrugated fuel tank, sealed structure, no oil leakage, maintenance-free.
Fully sealed transformer structural features:
1. No oil conservator, the height is lower than similar products
2. When the transformer is packaged, the vacuum oil filling process is adopted to completely remove the moisture in the transformer tank. After sealing, the transformer is not in contact with the air, effectively preventing oxygen and moisture from entering the transformer and causing a decrease in insulation performance (insulation material and oil aging), so it is not necessary to conduct oil sample tests on a regular basis.
3. The high and low voltage leads of the transformer, the body and other fastening parts are equipped with self-locking locknuts. The structure is not suspended, and the body and the fuel tank are closely matched to withstand transmission vibration and bumps.
4. After being soaked in the flood, it can be put into operation immediately without repairing
5. The fuel tank has two types of corrugated oil tank and expansion radiator fuel tank. The corrugated sheet and the expanded radiator not only have the cooling function, but also have the function of “breathingâ€. The elasticity of the corrugated sheet and the expanding radiator can compensate the cause. The change in oil volume caused by temperature changes.
6. Sealed type: It is divided into welding type and detachable type.
Welded type ------- the edge of the box and the cover are welded after passing all tests
Removable ------- Sealing the edge and cover of the box with sealing strips and bolts
7. The cover is equipped with a rod-shaped oil plug higher than the oil level of the high-pressure bushing.
8. No need to change oil during normal life, improve the safety and reliability of power grid operation
9. Protection device:
Pressure relief valve ------- When the transformer overload or fault causes the internal pressure of the tank to reach 35KPA, the pressure relief valve will act, reliably release the pressure, and when the pressure is reduced to the normal value, it will return to its original state, ensuring the transformer. Running.
Temperature measuring device ------The cover of the transformer is equipped with a thermometer base
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