Product Introduction
The 500KVA 3 phase transformer was delivered to Paraguay in 2024, the rated power of the transformer is 500 KVA. It is a Step Down transformer from 22.9kv to 0.4kv, the primary voltage is 22.9kv, the secondary voltage is 0.4kv. We can supply both 500 KVA Step Up and Step-Down transformer, the cooling method is ONAN. Our 500 KVA distribution transformer was designed with advanced technology and adopts high quality material and components which result in reliable quality and long service time.
YAWEI ensures each one of our delivered transformer had passed the full acceptance test before shipping and we remains 0 fault rate record for more than 10 years so far, oil immersed power transformer is designed in accordance with IEC, ANSI and other major international standards.
Scope of Supply
Product: Oil Immersed distribution Transformer
Rated Power: Up to 5000 KVA
Primary Voltage: Up to 35 KV
Technical Specification
500 KVA power transformer specification and data sheet
| Model | S11-500KVA-22.9/0.4KV |
| Rated Power | 500KVA |
| Primary Voltage(V) | 22900 |
| Secondary Voltage(V) | 400 |
| Insulation Level(KV) H.V BIL | 125 |
| Frequency | 50Hz |
| Vector Group | Dyn11 |
| Winding Material | Copper |
| Insulation Oil | Mineral Oil |
| Temperature Rise | 55℃ |
| Load loss at rated voltage | ≤6400W |
| No load loss | ≤860W |
| Impedance | 4% |
| Altitude |
≤1000m |
Technical Drawing
500 KVA 22.9/0.4KV Transformer Manufacturing
Iron Core
1.The core is made from high-permeable grain-orientated top quality cold-rolled silicon sheet
2.The silicon sheet fabrication adopts "no-upper yoke lapped' technology and all lapped joints of the silicon sheet are 45 full-miters.
Winding
1. Enamelled magnetic copper or aluminum wire is produced by Nantong Budweiser, which is a 100% subsidiary company belongs to YAWEI.
2.Our windings are made of high quality copper.
3.Both High Voltage (HV) and Low Voltage (LV) windings are done using Coil Winding Machines. The Copper or Aluminum strips/wires used in winding are meticulously selected for its quality to give the best output. The Copper or Aluminum strips/wires are paper covered and acts as insulators.
Oil Tank
1. Oil tank is produced by Nantong Zhihe, which is also a 100% subsidiary company belongs to YAWEI.
2. The oil tank is a power transformer housing containing the iron core, winding and transformer oil.
3. The corrugated tank structure is fully sealed, and the corrugated will expand and compress with the increase of oil, isolating the transformer from the atmosphere and preventing oil deterioration and moisture. After oil removal, rust removal and phosphating treatment, the surface of corrugated oil tank is coated with rainproof paint. Moisture and salt spray.
Routine tests of transformer include
1.Winding resistance test of transformer
2.Transformer ratio test
3.Transformer vector group test
4.Measurement of impedance voltage/short circuit impedance (principal tap) and load loss (Short circuit test)
5.Measurement of no-load loss and current (Open circuit test)
6.Measurement of insulation resistance
7.Dielectric tests of transformer.
8.Tests on on-load tap-changer.
9.Oil pressure test on transformer to check against leakages past joints and gaskets
Packaging
Wooden case or according to client's requirementsPackaging: Wooden case or nude packing according to client's requirements.The requirements for the making and reinforcement of packing boxes. we strictly apply to international standards.
Why Choose YAWEI?
1. Over 30 years professional experience in manufacture different kinds of electrical transformers.
2. Customer oriented professional technician team service. Complete and satisfying and in-time service for customer
3. Pass high standard quality test and certificate of UL, EC, IEC, CNAS,SA,IEEE,ISO9001:2000 quality system certification
4. Large and complete manufacturing from winding casing and power transfer. Complete control and main machine and material
quality. Service and product and customer cost is under control.
5. Good after-sales installation service for team abroad
6. Factory supply willing to establish long term cooperation with end user or trading company.
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