What is the lead time for production?

The average lead time is one month during peak season and within 15 workdays during the off-season.

Efficient on-Load Tap-Changing Transformer with Reliable Oil Immersion

Name: Efficient on-Load Tap-Changing Transformer with Reliable Oil Immersion
Brand: Zhejiang Tianrun Electric Co., Ltd.
SKU: 2318780025

Zhejiang, ChinaZhejiang Tianrun Electric Co., Ltd.

US$5,869.00

1-9 Pieces

US$5,125.00

10+ Pieces

Product profile

Customization

Available

Application

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

Phase

Three

Model NO.

SZ13

Core

Core-type Transformer

Cooling Method

Oil-immersed Type Transformer

Winding Type

Two-winding Transformer

Certification

ISO9001-2000, ISO9001, CCC, CE

Usage

Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer, on-Load Tap Changing Transformer

Frequency Characteristics

Power Frequency

Shape of Core

Ring

Brand

Tenrony

Rated Frequency

50/60Hz

Rated Voltage/Hv

11/33kv/35kv

Rated Voltage/LV

400V

Transformer Capacity

1250-31500kVA

Connection of Transformer Winding

Ynd11

Winding

Copper

Protective Function

Outdoor IP23/Indoor IP44 Sealed Tank

Noise Level

≤ 52db/Silent Version ≤ 48db

Temperature Rise Limits

Top Oil ≤ 55K; Winding ≤ 65K

Insulation Level

Hv: Li200 AC85kv; LV: Li75 AC35kv

Total Tap Positions

17 (±8 Taps)

Short-Circuit Impedance

7% ±5%

No-Load Current

≤ 0.45%/Ultra-Low No-Load Current

No-Load Loss

3.15kw (Better Than National Grade-2)

Matched Tap Changer

Syjzz Vacuum Olt/Neutral-Point Type Syxzz

Transport Package

Wooden Case

Specification

1200*1850*2100mm

Trademark

TENRONY

Origin

China

HS Code

8504109000

Production Capacity

200/Monthly

Key features

Zero Interruption Regulation: Continuous automatic voltage regulation under full load without power interruption.

Vacuum Arc Extinction: SYJZZ vacuum OLTC eliminates oil carbonization, extending oil change intervals by 3 times.

Dual Oil-Chamber Isolation: Switch has a sealed oil compartment separated from main tank, preventing contamination.

Robust Copper Windings: Oxygen-free copper windings with vacuum impregnation for moisture resistance and low partial discharge.

Intelligent VQC Control: Automatic tap change in 3-6 seconds with remote control and fault auto-lock functions.

Anti-Leakage Tank: Fully sealed steel tank with kerosene leak detection and anti-corrosion epoxy coating.

Wide Application Fit: Ideal for 35kV substations, new-energy stations, and critical industrial continuous processes.

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: ≤0.17h

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:Does the transformer require power interruption during voltage regulation?

No. The built-in SYJZZ vacuum on-load tap changer allows continuous automatic voltage regulation under full rated load without any power interruption.

Q:How does the SYJZZ OLTC improve maintenance efficiency?

It uses vacuum-bulb arc extinction which prevents oil carbonization. This extends the oil change interval by 3 times compared to traditional switches and allows inspection without lifting the core.

Q:Is the OLTC oil chamber isolated from the main transformer oil?

Yes. The switch has its own sealed oil compartment fully separated from the main-tank insulating oil, ensuring arc-extinction impurities do not contaminate the main winding oil.

Q:What control modes are supported by the OLTC system?

The system supports local automatic, local manual-motorized, and remote control modes. It also includes manual mechanical regulation for emergency maintenance without grid supply.

Q:What certifications does this transformer hold?

The product holds ISO9001-2000, ISO9001, CCC, and CE certifications, and is designed according to GB/T6451-2015, GB1094, and GB10230 standards.