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33kV Automatic Voltage Regulating Transformer for Africa

This Oil immersed power transformer is TAILI self-developed online automatic voltage regulating transformer which is designed for factories operating under extremely unstable power supply conditions.

It automatically stabilizes output voltage to 380V / 400V even when input voltage fluctuates widely (from 260V up to 530V), ensuring reliable and continuous power for industrial equipment.

The product is especially suitable for industrial plants in regions with weak power infrastructure, frequent voltage fluctuations, or unstable grid conditions, and is designed and manufactured in compliance with IEC 60076 and IEC 60214 standards.

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Basic Info.

Primary Voltage	33kV
Secondary Voltage	0.4kV
Vector Group	Dyn11
Impedance	7%
Capacity (Power Rating)	3.2 MVA
H.V. Tap Range	±43.5% /±102.5%
BIL (Basic Insulation Level)	30–150 kV
Standards	IEC, IEEE, ANSI, DOE
Certificates	CE, SGS, CNAS

Features of Automatic Voltage Regulating Transformer

1. Online Automatic Voltage Regulation
The power transformer is equipped with an on-load tap changer (OLTC), enabling real-time voltage adjustment without power interruption.

2. Wide Voltage Regulation Range
Voltage range: ±4 × 3.5% or ±10 × 2.5%

3. Extremely Wide Input Voltage Tolerance
Maintains stable output even when incoming voltage varies between 260V and 530V.

4. Protection for Industrial Equipment
Effectively prevents damage caused by overvoltage and undervoltage, improving equipment lifespan.

5. Designed for Harsh Grid Conditions
Ideal for regions with unstable grids, frequent outages, or large day–night voltage fluctuations.

6. High Reliability and Customizable Design
Robust construction for continuous industrial operation, with flexible options for voltage levels, regulation range, and protection configurations.

Second, the core advantages and characteristics of the product

01 Production Equipments for Oil transformers

35kv Oil Immersed Power Transformer

02 Oil immersed power transformer spare parts

33kV Automatic Voltage Regulating Transformer for Africa

03 Power transformer

35kv Oil Immersed Power Transformer

Application scenarios

Power Utilities & Grid Distribution Systems

This includes urban and township substations, regional distribution stations, long-distance distribution nodes, and grid expansion or upgrade projects. 35 kV transformers are mainly used for stepping down 35 kV to medium-voltage levels (10–22 kV) for stable regional power supply.

Industrial, Infrastructure & Energy Projects

Widely applied in industrial parks, manufacturing plants, mining sites, oil and gas fields, data centers, airports, ports, rail transit systems, and renewable energy plants (solar/wind). They provide reliable medium-voltage power for large-scale industrial and infrastructure loads.

Rural Electrification & Public Utilities

Used in rural power networks, agricultural irrigation systems, new rural development, and public facilities such as hospitals, schools, and government buildings. The 35 kV voltage level offers long transmission distance and cost-efficiency, making it ideal for rural and remote-area electrification.

Package and Shipping

35kv Oil Immersed Power Transformer

Service System

Pre-sales support

- Provide customized power distribution scheme design to optimize cabinet size, equipment layout and product configuration;

- For special needs (such as non-standard voltage, explosion-proof certification), provide detailed technical solutions within 12 hours.

Routine tests:

-Measurement of winding resistance

-Measurement of voltage ratio

-Check of vector group

-Mesurement of impendance voltage and load loss

-Measurement of no load oss and current

-Separate-source voltage withstand test

-Induced overvoltage withstand test

-Dimension checking

Type Tests

-Lighting impulse test

-Temperature rise test

After-sales guarantee

- Quick response: reply to fault report within 24 hours, remote debugging or on-site service within 48 hours (domestic);

- Regular return visits: inspect the operation status of the equipment free of charge every year and provide maintenance suggestions;

- Transparent service: the cause of the failure is explained in writing, the maintenance cost is priced according to the market standard, and the cost is refunded on the spot for valid complaints;

- Warranty policy: 1-3 years warranty for the whole machine (according to the model), lifetime costprice spare parts supply.

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