Complete Product Introduction

1. Product Overview

The SC(B)10-6-10kV epoxy resin cast dry-type transformer is a new type of power distribution transformer with epoxy resin as the main insulation material, adopting vacuum casting molding process. It covers a capacity range of 30kVA to 2500kVA, with excellent insulation performance, fire and explosion proof, low loss, low noise and maintenance-free characteristics, and is widely used in various power distribution systems.

2. Scope of Application

This product is mainly applicable to 10kV power distribution systems in high-rise buildings, commercial centers, hospitals, airports, subway stations, industrial and mining enterprises, data centers and other places with high fire safety requirements. It is especially suitable for occasions where oil-immersed transformers are restricted to use, and can operate stably in environments with high humidity, high altitude and moderate pollution.

3. Model Interpretation

The product model coding contains the core structural characteristics and parameter information of the transformer. The specific meaning of each part of the model is as follows:

4. Working Conditions

The transformer can operate reliably under the following environmental and working conditions to ensure stable performance and long service life:

• Ambient temperature: The maximum ambient air temperature does not exceed 40℃, the minimum ambient air temperature is -25℃, and the average temperature of the hottest month does not exceed 30℃.
• Altitude: The installation altitude does not exceed 1000m (if exceeding 1000m, derating use is required or customized according to user requirements).
• Humidity: The monthly average relative humidity of the wettest month does not exceed 90%, and the monthly average temperature does not exceed 25℃; no condensation occurs on the surface of the transformer.
• Power supply quality: The voltage fluctuation range does not exceed ±5% of the rated voltage, and the frequency fluctuation range does not exceed ±2% of the rated frequency (50Hz).
• Installation environment: No corrosive gas, flammable and explosive gas, no serious dust, no violent vibration and impact at the installation site.
• Operation mode: Continuous operation under rated load, and short-term overload operation is allowed according to the regulations (overload 10% for 2 hours, overload 20% for 30 minutes).

5. Executive Standards

The design, production and inspection of the product strictly comply with the following national and international standards to ensure the compliance of product quality and performance:

• GB1094.1-2013 Power Transformers - Part 1: General Requirements
• GB1094.3-2003 Power Transformers - Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air
• GB1094.11-2007 Power Transformers - Part 11: Dry-type Transformers
• GB/T10228-2015 Technical Requirements for Dry-type Power Transformers
• International Standard IEC 60076 Power Transformers

6. Performance Features

• High insulation performance: Epoxy resin casting insulation structure, with excellent resistance to partial discharge, moisture resistance and aging resistance, partial discharge quantity ≤5pc.
• Fire and explosion proof: No oil in the whole machine, no fire, explosion and oil leakage risks, high safety performance.
• Low loss and energy saving: The no-load loss is reduced by more than 30% compared with the traditional dry-type transformer, and the operation efficiency is high.
• Low noise: The noise level is 5-8dB lower than the national standard, which meets the environmental protection requirements of urban power distribution.
• Maintenance-free: Sealed structure design, no need for regular oil change and maintenance, reducing operation and maintenance costs.
• Strong overload capacity: It can adapt to the complex load changes of the power grid and has good thermal stability.

7. Structural Features

• Core: Adopts cold-rolled grain-oriented silicon steel sheet with high magnetic permeability, assembled by three-phase five-column or three-phase three-column structure, and the core is bound with glass fiber tape to ensure no loosening and low noise; the surface of the core is coated with insulating paint to prevent corrosion and reduce eddy current loss.
• Windings: The high and low voltage windings are all made of epoxy resin vacuum casting molding process. The low-voltage winding adopts foil winding structure (for small and medium capacity) or cylindrical winding structure (for large capacity), with good mechanical strength and heat dissipation performance; the high-voltage winding adopts segmented cylindrical structure, with epoxy resin cast as a whole, and the inner and outer surfaces are provided with ventilation channels to ensure good heat dissipation.
• Insulation structure: The main insulation between high and low voltage windings adopts epoxy resin cylinder and insulating pad, with uniform electric field distribution and high insulation reliability; the inter-turn and inter-layer insulation of windings adopts high-grade insulating materials to meet the requirements of long-term operation.
• Frame and shell: The transformer is equipped with a steel frame, and the windings and core are fixed on the frame to ensure structural stability; the shell can be configured with a protective cover with ventilation holes according to user requirements, which has the functions of dust prevention, protection and noise reduction.
• Tap changer: The high-voltage side is equipped with an off-load tap changer, which can adjust the output voltage within the range of ±5% or ±2×2.5% according to the grid voltage change, and the tap changer is easy to operate and reliable in contact.
• Cooling system: Natural air cooling (AN) is adopted for basic type, and forced air cooling (AF) can be configured according to user requirements, which can increase the capacity by 40% under forced air cooling condition.

8. Main Technical Parameters

Notes:
1. The load loss is measured at 120℃ of winding average temperature (converted from 75℃ data).
2. For transformers with Dyn11 connection group, the loss parameters can be adjusted according to user requirements.
3. Customized technical parameters can be provided according to user special requirements.

9. Overall & Installation Dimensions