800kVA-31500kVA 35kv Oltc Oil Immersed Power Transformer

Name: 800kVA-31500kVA 35kv Oltc Oil Immersed Power Transformer
Brand: Yueqing Liyond Electric Co., Ltd.
SKU: 2315916345

Zhejiang, ChinaYueqing Liyond Electric Co., Ltd.

US$20,000.00-100,000.00

1 Piece

Product profile

Customization

Available

Application

Power

Phase

Three

Model NO.

SZ11-800~31500/35

Core

Core-type Transformer

Cooling Method

Oil-immersed Type Transformer

Winding Type

Two-winding Transformer

Certification

ISO9001

Usage

Power Transformer, Distribution Transformer

Frequency Characteristics

Power Frequency

Shape of Core

Circular

Brand

Liyond

Rated Capacity Range

800kVA - 31500 kVA

Voltage Regulation Type

on-Load Tap Changing (Oltc)

Hv Tapping Range

+/-3X2.5% or +/-4X2.5%

Vector Group

Yd11 / Ynd11

Short Circuit Impedance

6.5% / 7.0% / 7.5% / 8.0%

Ambient Temperature

-40℃ ~ +40℃

Installation Altitude

≤ 1000 M

Standards

GB 1094, GB 6451

OEM

Transport Package

Standard Export Packaging

Specification

35kV

Trademark

Liyond

Origin

China

Key features

OLTC for Stable Voltage: Equipped with advanced On-Load Tap Changer supporting +/-3x2.5% or +/-4x2.5% range. Adjusts voltage under load without power interruption for manual/auto grid stability.

High-Efficiency CRGO Core: Utilizes premium grain-oriented cold-rolled silicon steel sheets with full-mitred joints. Stepped round cross-sections minimize no-load loss and noise.

Concentric Winding Design: Features concentric coils with precision-routed high-voltage taps connected to top-cover switches, ensuring high mechanical strength and short-circuit resistance.

Reliable Safety Devices: Standard configuration includes built-in gas relay and heavy-duty pressure relief valve to ensure secure handling of thermal expansion and internal grid faults.

Advanced Oil Preservation: Fitted with a robust oil conservator, precise level gauge, and oil-sealed moisture absorber to completely isolate the insulating oil from ambient moisture.

Real-Time Thermal Control: Standard thermometer pockets extend 120mm into oil. Units of 1000kVA and above include outdoor signal thermometers for reliable remote temperature monitoring.

Company profile

Yueqing Liyond Electric Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Trading CompanyExport Year: 2011-04-07 CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤3.54h CertifiedTerms of Payment: LC, T/T, D/P, etc. CertifiedInternational Commercial Terms(Incoterms): FOB, CIF, CFR

About Our Factory & Business Background

AddressRoom 1801, building 2, 3 and 4, headquarters economic Park, No. 6688, Xuyang Road, Chengdong street, Yueqing City, Zhejiang Province

Plant Area1100 square meters

Number of Employees18

Registered Capital5,000,000 RMB

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

Our Production Capability & Technical Expertise

Main ProductsMedium and High Voltage Switchgear, Switchgear Accessories, Vacuum Vircuit Breaker, Vacuum Circuit Breaker Accessories, Earthing Switch, Load Break Switch, Auxiliary Switch, Conductive Parts, Insulation Parts

R&D Engineers2 people

Our Industry Experience & Global Business Record

Year of Establishment2011-04-07

Main MarketsNorth America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea)

Number of Foreign Trading Staff7

Overseas Agent/BranchNo

Our Certifications, Standards & Industry Recognition

Product CertificationCE

Product Q&A

Q:What is the main application of the SZ11 35kV transformer series?

The SZ11 series 35kV oil-immersed transformer is primary designed for 50Hz, 35kV electrical power systems. It serves as a central substation component for power distribution in industrial plants, regional grids, and mining operations.

Q:How does the on-load tap changer function on this transformer?

The transformer is equipped with an On-Load Tap Changer (OLTC) connected to high-voltage winding taps. It allows voltage adjustments within ranges of +/-3x2.5% or +/-4x2.5% directly under load conditions without cutting off power, operating via manual or automatic control systems

Q:What core materials are used to ensure low operational loss?

The transformer utilizes high-permeability, grain-oriented cold-rolled silicon steel sheets (CRGO). It features a full-mitred joints core design with stepped round cross-sections to drastically reduce no-load current and losses.

Q:What protective devices are standard for safety and thermal monitoring?

For reliable operation, the transformer features a gas relay, a pressure relief valve, an oil conservator with a level gauge, and a moisture absorber. For units rated at or above 1000kVA, an outdoor signal thermometer is integrated into the top tank cover for temperature oversight