Oil Immersed Power Transformer 3-Phase 6kv-15kv 100-400kVA S11 110V Input & 380V Output

• Customization: Available
• Application: Power, Electronic, Instrument
• Phase: Three
• Model NO.: SZ-35KVA
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Separated Winding Transformer
• Certification: ISO9001, CCC
• Usage: Combined Transformer, Power Transformer, Distribution Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: Ring
• Brand: Zhengxi
• Rated Power: 50~31000kVA
• Voltage: 380V/3kv/6kv/11kv/33kv
• Connection: Dyn11/Yd11/Yyno
• No-Load Losses(Kw): 0.1~2.8
• Impedence: 4%
• Transport Package: Wooden
• Specification: 3000*2000*2500
• Trademark: ZHENGXI or OEM
• Origin: Zhejiang, China

Product Description

Overview

The SZ-35KV Oil-Immersed Transformer is a highly efficient, on-load voltage regulating transformer designed for power systems operating at 35kV and below. Operating under a frequency of 50Hz, this transformer is a key component in medium and small-sized substations. It provides reliable power distribution for industrial, agricultural, and lighting applications.
 

 

Product Parameters

 

 

Rated Capacity	Voltage Ratio	Vector Group	No-load Losses(kw)	Impedence
30kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.1	4%
50kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.13	4%
100kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.2	4%
200kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.34	4%
315kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.42	4%
500kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	0.6	4%
1000kva	380v/3kv/6kv/11kv/33kv	Dyn11/Yd11/Yyno	1.15	4.5%
1250kva	6kv/11kv/33kv	Dyn11/Yd11/Yyno		4.5%
2500kva	11kv/33kv	Dyn11/Yd11/Yyno	2.3
4000kva	11kv/33kv	Dyn11/Yd11/Yyno	2.8
10mva	11kv/33kv/69kv/110kv	Dyn11/Yd11/Yyno
40mva	11kv/33kv/69kv/110kv	Dyn11/Yd11/Yyno
100mva	11kv/33kv/69kv/110kv/220kv	Dyn11/Yd11/Yyno

Structural Features

1. Iron Core

The iron core is fabricated using high-grade cold-rolled silicon steel sheets. The core design incorporates:

• Fully biased multi-stage joints
• Non-punch hole wind cores
• Stainless steel stays and epoxy glass tape reinforcement

2. Coil Design

The winding conductors are manufactured from high-purity oxygen-free copper wires, available as enameled wire or paper-wrapped flat copper wire. The coil structures include:

• Drum type
• Spiral type
• Improved spiral
• Continuous winding
• Staggered layout

This design ensures uniform distribution of magnetic flux and prevents hot-spot formation.

3. Oil Tank

The oil tank is available in:

• Barrel-type or shielded construction
• Corrugated plates or electroplated radiators for cooling

Instead of wheels, the base is welded to meet national gauge standards for stable, fixed installation.

4. Safety & Protection Devices

Based on customer and standard requirements, the transformer can be equipped with:

• Pressure relief valve
• Gas relay
• Signal thermometer
• Oil conservator