Product Introduction
These 4 units 5000 kVA epoxy resin cast dry type transformer was delivered to South Africa in 2023. The rated power of the dry type transformer is 5000 kVA, the primary voltage is 22 kV and secondary voltage is 6.6 kV with delta star connection. This dry-type transformer has an open hole at the top and additional accessories such as surge arrester, which is different from ordinary dry-type transformers. The transformer is equipped with no load tap changer, the tapping range is ±2*2.5% at primary side, the cooling is AN/AF, the connect group is Dyn11. Cast resin technology provides excellent insulation and environmental protection, this together with the foil winding technology inside the resin offers the ultimate dry type transformer in terms of dielectric performance and short circuit withstand ability and ensures long term reliability for both distribution and special applications. cast resin transformers can be supplied with either aluminum or copper windings together with possibility of class F or class H insulation system, they can be designed to in-door or out-door installation with different enclosures.
We ensure that each one of our delivered units has undergone rigorous full acceptance testing. We provide one-package service from consulting, quoting, manufacturing, installation, commissioning, training to after sale services, our products are now operating in more than 50 counties in the world. We aim to be your most reliable supplier as well as your best partner in business!
Advantages
Fire resistant /Self-extinguishing(F1)
Environmental class(E2) and climatic class (C2)
From IP00-IP56 enclosure with AN, AF, ANAF or AFWF cooling
Maintenance free
Environmental friendly ,＞90% of material recyclable
Temperature control system
Built-in PT100 probes in 3 phase windings to detect the real-time temperature of windings and cycle display them in the digital screen.
Open circuit alarm and fault self-check alarm display and signal output.
3 stages automatically actions while the temperature reached to the set value, 1st stage the cooling fans start automatically, 2nd stage high temperature alarm,3rd stage over temperature trip.
Fans manual/auto control switch, timing start/stop, history data output.
4-20mA current output
RS485 Modbus communication protocol
Environment temperature measurement
Core temperature measurement
Scope of Supply
Product: resin cast dry type transformer
Voltage level: up to 35KV
Rating level: up to 20MVA
The transformer can be designed according to customer’s requirements
Technical Data Sheet
5000 KVA Dry Type Transformer specifications and data sheet
| Delivered to | South Africa |
| Year | 2023 |
| Model | SCB-5000kVA-22/6.6kV |
| Type | Resin cast dry type transformer |
| Standard | IEC60076 |
| Rated Power | 1600 kVA |
| Frequency | 50 HZ |
| Phase | Three |
| Cooling Type | AN/AF |
| Primary Voltage | 22 kV |
| Secondary Voltage | 0.42 kV |
| Winding Material | Aluminum |
| Vector Group | Dyn11 |
| Impedance | 6% or above |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | 7000 W |
| On Load Loss | 36000 KW |
| Accessories | Temperature controller, Cooling fans, Enclosure, Skids, lifting lugs & pulling eyes, surge arrester, UPS/VSDs/LED Lighting/Controls，Rubber supports for anti vibration |
| Remarks | N/A |
5000kVA-22/6.6kV Transformer Drawing
5000 kVA transformer diagram drawing and size.
5000kVA-22/6.6kV Transformer Manufacturing Process
Transformer Winding:
1.Our windings are made of high quality copper.
2.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.
Transformer Enclosure
Finished 5000kVA-22/6.6kV Transformer
The epoxy resin dry type transformer has the characteristics of good electrical performance, strong lightning impact resistance, strong short-circuit resistance, small size, and light weight. The temperature display controller can be installed to display and control the operating temperature of the transformer windings to ensure the normal service life of the transformer.
5000kVA-22/6.6kV Transformer Name Plate
Packing and Delivery
Installation Commissioning and Operation
Why Insulation resistance of dry type transformer decreased：
1.Reason analysis. Pouring type dry transformer winding is mostly made of resin pouring, conductor material is sealed in it, so the decrease of insulation resistance is mostly caused by moisture condensation on the surface of winding, dust accumulation or part of insulation material being affected by moisture.
2.Processing method： Clean winding surface, surface moisture condensation with dry cloth wipe, natural air can be restored. It can be dried by heater and ventilated by fan. The neutral line (zero row) of the three-phase connection of dry-type transformer can be disconnected. The megohm meter is used to determine which phase the problem is in, and then the problem is carefully searched and processed.
FAQ
1. Where is your main market?
We had exported our transformers to more than 50 countries in the world, our main market is Africa countries, South and North American countries, and Asia countries.
2. What certificate do you have?
We have KEMA, CESI, CTQC type test report for our transformers.
3. How long is your delivery time?
30 days after drawing confirmed by buyer for distribution transformers below 5000kva, bigger transformers depend on the capacity and components, normally 30-90days(with imported components)
