Complete Product Introduction

1. Product Brief Introduction

The SC(B)(Z)11 series three-phase cast resin dry-type distribution transformer covers a capacity range of 50kVA-3150kVA with 15 varieties in total. The product adopts epoxy resin vacuum casting process, featuring flame retardancy, explosion-proof performance and maintenance-free operation, with main technical and economic indicators reaching the international advanced level of similar products.

2. Model Meaning & Explanation

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

Model Breakdown:
- SC: Three-phase solid-encapsulated (epoxy resin cast) transformer
- B: Low voltage foil winding
- Z: On-load tap changer
- 11: Performance level code
- XXXX: Rated capacity (kVA)
- 35kV: Voltage class (kV)

3. Executive Standards & Specifications

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

• GB1094.1-2013 Power Transformers - Part 1: General
• GB1094.3-2003 Power Transformers - Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air
• GB/T1094.4-2005 Power Transformers - Part 4: Guide to Lightning Impulse and Switching Impulse Testing
• GB1094.5-2008 Power Transformers - Part 5: Ability to Withstand Short Circuit
• GB/T6451-2008 Technical Parameters and Requirements for Three-Phase Oil-Immersed Power Transformers
• International Standard IEC76 Power Transformers
• GB/T10228-2015 Technical Requirements for Dry-Type Power Transformers

4. Performance Characteristics

• Epoxy resin vacuum casting structure, with excellent moisture resistance, dust resistance and corrosion resistance, suitable for harsh environments.
• High short-circuit resistance and reliable operation performance, with overall performance reaching advanced international levels.
• Low no-load loss and low noise meet the requirements of energy conservation and environmental protection.
• Excellent thermal stability and overload capacity to adapt to complex power grid operating conditions.
• Flame-retardant and explosion-proof, no pollution to the environment, safe and reliable.

5. Structural Characteristics

The product adopts a scientific and reasonable structural design to ensure stable operation and long service life, with the following structural characteristics:

• Core: Adopts three-phase five-limb or three-limb structure, made of high-quality cold-rolled grain-oriented silicon steel sheet, with low no-load loss and no-load current.
• Windings: High-voltage winding adopts continuous structure, low-voltage winding adopts foil structure, with excellent mechanical strength and heat dissipation performance.
• Insulation: Epoxy resin vacuum casting, with high insulation strength and good thermal conductivity.
• Temperature Monitoring: Equipped with temperature controller and PT100 temperature sensor to realize real-time monitoring and over-temperature protection.

6. Main Technical Parameters

Rated Capacity (kVA)	Voltage Combination (kV)			Connection Symbol	Loss (kW)		No-Load Current (%)	Short-Circuit Impedance (%)
	High Voltage	High Voltage Tap Range	Low Voltage		Load	No-Load
50	20,22,24/10,11,12	±5% / ±2×2.5%	0.4	Dyn11	1.23	0.3	2.3	6
100					1.98	0.47	1.9
160					2.46	0.58	1.7
200					2.93	0.64	1.6
250					3.4	0.73	1.5
315					4.06	0.84	1.4
400					4.82	1.0	1.3
500					5.76	1.17	1.3
630					6.8	1.32	1.2
800					8.22	1.52	1.1
1000					9.73	1.79	1.0
1250					11.48	2.06	1.0
1600					13.79	2.41	0.9
2000					16.29	2.8	0.9
2500					19.27	3.34	0.8
3150					22.6	3.9	0.8

Notes:
1. The loss values are tested under rated conditions.
2. For technical parameters of 35kV distribution transformers with customized requirements, please consult our company.
3. Transformers with customized voltage combinations, winding impedance and connection modes can be provided according to user requirements.
4. The parameters in the table are for reference only, and no separate notice will be given if there are changes.

7. Ordering Notes

When placing an order, the following information must be provided to ensure accurate product customization and delivery:

• Product model number
• Rated capacity
• High and low voltage rated voltage and high voltage tapping range
• Number of phases, frequency
• Connection group symbol
• Requirements for temperature monitoring and protection devices
• Installation site and environmental conditions