What information is required for ordering?

Required information includes model and rated capacity, rated voltage and regulation range, connection group (default Ya0), tap positions (7 or 9), transformer oil grade, optional GPRS module, and special environmental conditions.

Does the product support customization?

Yes, the product offers full customization, minor customization, and customization from samples or designs. Voltage, capacity, and regulation ranges can be tailored to specific requirements.

Automatic Voltage Regulation Electric Transformer with Oltc Functionality

Name: Automatic Voltage Regulation Electric Transformer with Oltc Functionality
Brand: Zhejiang Tianrun Electric Co., Ltd.
SKU: 2314890215

Zhejiang, ChinaZhejiang Tianrun Electric Co., Ltd.

US$50,000.00

1-9 Pieces

US$20,000.00

10+ Pieces

Product profile

Customization

Available

Application

Power, Lighting, Rectifier, Combined Transformer, Power Transformer,

Phase

Three

Model NO.

BSVR

Core

Core-type Transformer

Cooling Method

Oil-immersed Type Transformer

Winding Type

Auto-transformer

Certification

ISO9001-2000, ISO9001, CCC, CE

Usage

Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer, SVR Feeder Auto Voltage Regulator

Frequency Characteristics

Power Frequency

Shape of Core

Ring

Brand

Tianrun

Rated Frequency

50/60Hz

Rated Voltage/Hv

6kv,10kv,35kv ,Customised

Rated Voltage/LV

6.6kv,11kv,38.5kv , Customized

Transformer Capacity

1250-31500kVA ,Customized

Vector Group

Ya0 (Three -Phase and Three -Line Star Wiring)

Winding

Copper

Protective Function

Overcurrent, Under Pressure, Number of Daily Actio

Communication Method

with Standard RS485 or GPRS Communication Interfa

Tap Position

7 or 9

Regulation Mode

on-Load Tap Changer

Display Function

But The Voltage, Current, Gear, Daily Movement, Nu

Regulating Range

±10%, ±15%, ±20% (or Customized -30%~+10%)

Cooing Method

Oil-Immersed Natural Cooling

Transport Package

Wooden Case

Specification

1500*1400*2000mm

Trademark

TRNE

Origin

China

HS Code

8504231100

Production Capacity

200/Monthly

Key features

Bidirectional Voltage Management: Handles forward and reverse power flows to suppress over-voltage from renewable integration.

On-Load Tap Changer (OLTC): Enables voltage regulation without power interruption via 7 or 9 tap positions.

Intelligent Remote Control: Features RS485/GPRS communication for real-time monitoring and parameter configuration.

High Precision Protection: Includes over-voltage fast-drop, under-voltage lockout, and tap-position protection.

Durable Construction: Core-type silicon-steel core with oxygen-free copper windings and fully sealed tank.

Low Loss Design: Optimized for large rated capacity with minimal no-load and load losses.

Customizable Specifications: Voltage, capacity, and regulation range can be tailored to specific project needs.

Company profile

Importers and ExportersFull Customization100% Finished Products InspectionR&D Capabilities

Zhejiang Tianrun Electric Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 Year CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤1.01h

About Our Factory & Business Background

AddressNo. 788 Wenyi Road, Bihu Industrial Park, Liandu District, Lishui, Zhejiang, China

Plant Area50369.12 square meters

Number of Employees167

Registered Capital107,580,000 RMB

Terms of PaymentT/T

International Commercial Terms(Incoterms)FOB, CIF

Average Lead TimePeak Season Lead Time: one month Off Season Lead Time: within 15 workdays

Minimum Order Quantity1

Supply Chain Partners80

Our Production Capability & Technical Expertise

Main ProductsTransformer Switchgear Substation

Production Lines2

Production MachinesPunching machine, Laser cutting machine, CNC bending machine, Winding machine, Drying machine

QA/QC inspectors3 people

Inspection Type for Finished Products100% inspection(Visual inspection & Function inspection)

Inspection Method for Finished ProductsFinished product checked by packing staff

R&D Engineers7 people

Traceability of Raw MaterialsYes

Our Industry Experience & Global Business Record

Year of Establishment2003-12-05

Main MarketsDomestic

Repeat Buyers Choice30%~50%

Number of Foreign Trading Staff1

Overseas Agent/BranchYes

New Products Launched in Last yearYes

Our Certifications, Standards & Industry Recognition

Management System CertificationISO9001:2015, ISO14001, ISO45001:2018

Product CertificationCE

Cooperated with Fortune 500No

Product Q&A

Q:What is the OLTC?

An on-load tap changer is a mechanism installed in power transformers that allows voltage regulation while the transformer remains energized and supplying load, without any interruption to power supply. Its primary role is to maintain a stable output voltage despite variations in input voltage or load conditions.

Q:What is the SVR?

SVR (Feeder Automatic Voltage Regulator) is an oil-immersed on-load tap-changing transformer series-installed in 6/10/35kV distribution feeders. It continuously tracks line voltage and automatically adjusts the on-load tap-changer position to regulate the transformation ratio, stabilizing the output voltage within the qualified range without supply interruption.

Q:What is the BSVR?

BSVR (Bidirectional Feeder Automatic Voltage Regulator) is a derivative of the SVR. Unlike the conventional SVR, the BSVR incorporates automatic power-flow direction detection, handling both forward (substation-to-load) and reverse (renewable-to-grid) flows to suppress terminal over-voltage caused by integrated PV, wind, or small-hydro generation.

Q:What is the relationship between OLTC, SVR, and BSVR?

OLTC is the shared core component switching winding taps under load. SVR is the base product for unidirectional feeders. BSVR is the bidirectional variant of SVR with added flow detection capabilities.

Q:What are the main applications of this product?

It is applied to radial distribution feeders, renewable-integrated feeders (wind, solar), substation outgoing feeders, and various industry sectors including urban/rural grids, oilfields, coal mining, chemicals, metallurgy, and railway tunnels.