Description
35kV SCB Series Dry-Type Transformer (SCB13, SCB14, SCB18)
35kV SCB Series Dry-Type Transformer (SCB13, SCB14, SCB18) is designed for reliable power distribution in power substations, industrial plants, commercial buildings, renewable energy projects and infrastructure power distribution. As a 35kV SCB dry type transformer, it provides oil-free insulation, stable operation and flexible configuration for projects that require safety, efficiency and long-term reliability.
Key Features
- Designed for medium-voltage power distribution where fire safety and low maintenance are important.
- Cast resin dry-type structure supports stable operation in indoor substations and demanding environments.
- SCB13, SCB14 and SCB18 options help match project targets for efficiency and loss performance.
- Custom voltage ratio, enclosure protection, temperature control and accessories are available.
Technical Parameters
| Basic Models | SCB10 / SCB11 / SCB12 / SCB14 / SCB18 |
|---|---|
| Transformer Structure | Epoxy resin cast dry-type transformer, copper winding, low-voltage foil winding |
| Rated Capacity | 50kVA-25000kVA; common ratings include 50, 100, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000 and 5000kVA |
| Rated Frequency | 50Hz standard; 60Hz can be customized |
| Phase | Three phase |
| Installation | Indoor installation; IP20 standard, IP40 optional |
| High Voltage | 35kV; maximum operating voltage 40.5kV |
| Low Voltage | 0.4kV / 10kV; 35/0.4kV is common |
| Tap Range | +/-2 x 2.5%, off-circuit tap changer |
| Connection Group | Dyn11 preferred; Yyn0 and Yd11 available |
| Thermal Class | Class F 155 C; Class H 180 C optional |
| Insulation Level 35/0.4kV | LI170AC70 / AC5 |
| Insulation Level 35/10kV | LI170AC70 / LI75AC35 |
| Partial Discharge | <=5pC standard |
| Pollution Level | Class III (d) |
| Cooling Method | AN natural air cooling / AF forced air cooling |
| Temperature Rise Limit | Winding 100K for Class F; core and structural parts 80K |
Loss, Mechanical and Operating Reference
| Short-Circuit Impedance | 6%-8%; 7%-8% for larger capacity designs |
|---|---|
| Short-Circuit Withstand | High-voltage side withstand up to 20kA for 4 seconds, subject to final design |
| Noise Level | 50-65dB under AN; 55-70dB under AF |
| Reference Weight | 1000kVA about 5500kg; 2000kVA about 8500kg; 4000kVA about 13000kg |
| Reference Dimensions | 1000kVA: 2000 x 1200 x 2000mm; 2000kVA: 2300 x 1400 x 2200mm; 4000kVA: 2600 x 1600 x 2500mm |
| Operating Altitude | <=1000m standard; derating is required above 1000m |
| Ambient Temperature | -25 C to +40 C |
| Loss Note | SCB14 and SCB18 models can be configured for lower loss performance according to the required efficiency level. |
Application Scope
- Transmission and distribution connection for 35kV substations, reducing regional grid voltage and connecting 35kV high-voltage grids with 10kV medium-voltage networks.
- Main step-down substations for steel, chemical, metallurgy and other heavy industrial enterprises.
- Primary distribution systems for large industrial parks and centralized power rooms.
- Step-up or step-down distribution in photovoltaic power stations and wind farms that require 35kV grid connection.
- 35kV distribution nodes in urban grid renovation and new regional grid construction projects.
Available Custom Options
- Rated capacity and voltage ratio
- Vector group, impedance and frequency
- IP enclosure, cooling fan and temperature control system
- Terminal arrangement, accessories, test reports and export packaging
Scope of application: 1. Power transmission and distribution link: 35kV substation, distribution voltage reduction of regional power grid, connecting 35kV high-voltage power grid and 10kV medium voltage power grid. 2. Large industrial scenarios: general step-down substations for heavy industrial enterprises such as ste
FAQ
What is 35kV SCB Series Dry-Type Transformer (SCB13, SCB14, SCB18) used for?
It is used for power substations, industrial plants, commercial buildings, renewable energy projects and infrastructure power distribution, especially where oil-free power distribution and safer indoor installation are preferred.
Can the transformer be customized?
Yes. Voltage ratio, rated capacity, enclosure protection, cooling method, accessories and project standards can be customized.
Which cooling methods are available?
AN natural air cooling is available as standard, and AF forced air cooling can be configured when higher load capability or project conditions require it.
What information is needed for a quotation?
Please provide capacity, voltage ratio, frequency, vector group, installation environment, required standard, quantity and destination country.
