S13 Three Phase 20kv Energy Saving Oil Immersed Medium Voltage Distributionelectrical Transformer Charging Station Substation Box Type Ultra High Box

• Customization: Available
• Application: Power, Power Transmission
• Phase: Three
• Model NO.: S11/S13/S20/S22
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Two-winding Transformer
• Certification: ISO9001-2000, ISO9001, CCC, KEMA
• Usage: Power Transformer, Distribution Transformer, Oil Immersed Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: U
• Reference Standards: IEC 60076
• Voltage (Hv) (Kv): 11 Kv
• Core Material: Silicon Steel
• Temperature Rise (W): 60/65K
• Insulation Class: a-Class
• Lightning Impulse Withstand Voltage: as Per IEC Standard
• Rated Capacity: 500 kVA
• Cooling Way: Onan/Onaf
• Transport Package: Wooden Package
• Specification: customized
• Trademark: Tianhua
• Origin: China
• HS Code: 8504220000
• Production Capacity: 10000 Units/Year
• Package Size: 725.00cm * 590.00cm * 850.00cm
• Package Gross Weight: 346.000kg

Product Description

 
 

Product Description

Definition & Structure

An oil-immersed transformer is a common power equipment that performs critical tasks such as voltage conversion and power distribution in electrical grids. It is widely used in urban/rural power grid upgrades, industrial/mining applications, combined transformers, and prefabricated substations.

Key components include:

1.Core: Laminated from high-permeability silicon steel sheets to form a closed magnetic circuit.
2.Windings: Made of copper or aluminum wire, serving as conductive loops wound around the core.
3.Tank: Houses insulating oil and supports other components.
4.Conservator (Oil Expension Tank): Compensates for oil volume changes.
5.Breather: Prevents moisture ingress.
6.Pressure Relief Device (Explosion Vent): Releases excessive internal pressure.
7.Radiators: Enhance heat dissipation.
8.Bushings: Provide external insulation for terminals.
9.Tap Changer: Adjusts voltage ratio.
10.Buchholz Relay: Detects internal faults.
11.Temperature Gauge & Oil Purifier: Monitor and maintain oil quality.
12.Oil :Serves as the primary insulation and cooling medium.

Performance Features

1.High Efficiency & Energy Savings:
Laminated core with minimal air gaps reduces losses and noise.
Near-circular core cross-section improves three-phase balance and lowers harmonic distortion.
2.Enhanced Reliability:
Oil penetrates silicon steel layers, damping noise.
Sealed construction protects insulation from environmental factors.
3.Strong Load Adaptability:
Adjusts input/output currents to meet varying load demands.
 

Cooling Methods

1.Oil-Natural Air-Natural (ONAN): Relies on natural oil convection.
2.Oil-Natural Air-Forced (ONAF): Adds fans to cool tank and pipes.
3.Oil-Forced Air-Forced (OFAF): Uses pumps to circulate oil through external coolers.

Insulation Structure

1.Internal Insulation:(1)Main Insulation: Oil-paper barriers isolate windings from grounded parts/other windings.
(2)Longitudinal Insulation: Separates sections within the same winding.
2.External Insulation: Bushings insulate terminals from ground/each other.
 

Insulation Structure

1.Internal Insulation:(1)Main Insulation: Oil-paper barriers isolate windings from grounded parts/other windings.
(2)Longitudinal Insulation: Separates sections within the same winding.
2.External Insulation: Bushings insulate terminals from ground/each other.
 

Operational Parameters

1.Temperature Limits:
Top oil temperature ≤ 90°C (85°C recommended for longevity).
Alarm triggers at 80°C.
2.Overload Capacity:
Permits 1.1-1.2× rated current during emergencies.
Monitor load/temperature post-alarm; reduce load if necessary.

Advantages.

Oil-immersed transformers are suitable for various power grid scenarios, featuring excellent structure and performance. They efficiently convert and distribute electrical energy, ensuring stable and secure power supply.

Product Parameter:

Product Name	Product Model	Product Feature	Product Parameter
Oil-immersed transformer	S11/S13/S20/S22	1. Energy conservation and environmental protection 2. Low load loss  3. Resistance to lightning strike 4. Strong short-circuit resistance	Type:Power Transformer Material:silicon steel sheet Frequency:50/60HZ Winding Material:Copper/ Aluminum Input Voltage:10kv-110kv Output Voltage:440v 400v 480v  Phase:ThreeThree Certification:ISO9001 Rated capacity:30-3000kva Cooling Method:ONAN Usage:Power  Electronic Shape : coil

 

Main Products

Company Profile

Jiangsu Tianhua Transformer Co. Ltd. Is a high-tech enterprise specialized in the production, development and sales of transformers and related products. Company is located in the second largest city in Jiangsu province, national comprehensive transportation hub, east China important science and education, culture, finance, tourism, health care, convention and exhibition center, important economic, commercial and trade center in Jiangsu province, Xuzhou city, the Beijing-Shanghai railway and the Longhai railway in this intersection, the Eurasian continental bridge traverses of Xuzhou, the transportation is extremely convenient.

The total investment of the company is 258 million Yuan, with registered capital of 55 million Yuan. The company has 270 employees, including 7 senior engineers. More than 110 senior technical personnel such as doctor and master degree. Since the company was founded, strictly follow the ISO9000 quality management system And provide customers with excellent quality products that meet the characteristics of each region.