What control modes are supported by the VQC regulator?

The system supports local automatic, local manual-motorized, and remote control modes, with end-position locking and fault auto-lock functions for safe operation.

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.

Reliable on-Load Tap-Changing Electric Transformer for Efficient Electrical Solutions for Power Supply

Name: Reliable on-Load Tap-Changing Electric Transformer for Efficient Electrical Solutions for Power Supply
Brand: Zhejiang Tianrun Electric Co., Ltd.
SKU: 2318839805

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

Continuous Voltage Regulation: Adjusts voltage under full load without power interruption, ensuring stable LV bus voltage.

Vacuum OLTC Technology: SYJZZ vacuum switch extends oil change interval 3x by preventing carbon contamination.

Dual Oil-Chamber Isolation: Switch oil compartment fully separated from main tank, protecting winding oil purity.

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

Intelligent VQC Control: Automated tap change in 3-6 seconds with remote, local, and manual operation modes.

Wide Application Scope: Ideal for 35kV substations, PV/wind farms, data centers, and continuous industrial plants.

Comprehensive Safety Features: Includes Buchholz relay, pressure relief valve, and multi-layer safety interlocking protection.

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: ≤0.01h

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 main function of the SYJZZ vacuum on-load tap changer?

It allows continuous automatic voltage regulation under load without power interruption, stabilizing the low-voltage side within national standards despite load fluctuations.

Q:How does the vacuum OLTC improve maintenance efficiency?

The vacuum-bulb arc extinction prevents oil carbonization, extending the oil change interval by 3 times compared to traditional oil-arc switches and drastically cutting maintenance costs.

Q:What are the key differences between this transformer and conventional off-circuit transformers?

This unit operates under full load with no power interruption and changes taps in 3-6 seconds, whereas conventional transformers require full station outage and manual changes taking 30+ minutes.

Q:What safety protections are included in the transformer design?

It features a dual oil-chamber isolation, Buchholz gas relay, pressure relief valve, temperature controller, and multi-layer safety interlocking to prevent dangerous regulation during faults.

Q:What are the typical application scenarios for this 35kV transformer?

It is suitable for 35kV urban regional substations, PV/wind farm booster stations, data centers, hospitals, airports, and continuous production lines in metallurgy and chemical plants.