DC Link Capacitor

Product Introduction

The DC Link Capacitor is a high-voltage capacitor solution designed for demanding rail transportation applications. It is suitable for railway traction systems and power conversion equipment where reliable DC energy storage and voltage stabilization are required.

With rated voltage options from 1200V to 4000V DC and capacitance from 1500μF to 6000μF, this capacitor can support different electrical requirements in railway power systems. Its robust construction, wide operating temperature range and multiple impregnation options make it suitable for long-term operation in demanding environments.

Key Product Features

• High-voltage DC operation from 1200V to 4000V

• Large capacitance range from 1500μF to 6000μF

• Operating temperature from -40°C to +70°C

• Expected lifespan up to 100,000 hours

• Designed for rail transportation applications

• Multiple enclosure configurations

• Fixed mounting with lifting lugs and bolted fixing

• Multiple impregnation technologies available

• Suitable for railway traction and power conversion systems

• Designed for stable and reliable long-term operation

Main Technical Specifications

Application in Rail Transportation

The DC Link Capacitor is developed for railway electrical and power conversion systems. It can be integrated into traction equipment and other rail power systems requiring high-voltage DC energy storage and stable electrical performance.

Typical application areas include:

• Railway traction systems

• Electric train power equipment

• Metro power systems

• Tram electrical systems

• Railway traction converters

• Auxiliary power equipment

• High-voltage DC power conversion systems

High-Voltage and High-Capacitance Performance

The capacitor provides rated voltage options between 1200V and 4000V DC, together with a capacitance range of 1500μF to 6000μF. This range allows system designers and equipment manufacturers to select an appropriate configuration according to the requirements of their railway power conversion equipment.

The high-capacitance design provides effective energy storage and supports DC bus voltage stabilization in high-power electrical applications.

Long Service Life

Railway power equipment is expected to operate reliably over extended service periods. The DC Link Capacitor has an expected lifespan of up to 100,000 hours, making it suitable for applications where long-term reliability and reduced component replacement requirements are important.

The operating temperature range of -40°C to +70°C further supports use across a wide range of railway operating environments.

Enclosure and Installation

The capacitor is available with a rectangular enclosure made from austenitic stainless steel or resin, providing flexibility for different equipment configurations.

A fixed mounting structure with lifting lugs and bolted capacitor fixing supports secure installation within railway power equipment. The mounting arrangement can also facilitate handling during equipment assembly and maintenance.

Impregnation Options

Different impregnation methods can be selected according to application and design requirements:

• Dry type

• Low-density high-performance resin potting

• Oil-immersed type

• Silicone oil impregnation

These construction options provide flexibility for different electrical, mechanical and environmental requirements.

Why Choose This DC Link Capacitor?

For railway equipment manufacturers and power system integrators, the DC Link Capacitor offers a combination of high-voltage capability, large capacitance, long expected lifespan and flexible construction.

Its main advantages include:

Wide Electrical Range: 1200–4000V DC rated voltage and 1500–6000μF rated capacitance.

Long Operating Life: Expected lifespan of up to 100,000 hours.

Wide Temperature Capability: Designed for operation from -40°C to +70°C.

Flexible Construction: Stainless steel or resin housing options are available.

Multiple Impregnation Solutions: Dry, resin-potting, oil-immersed and silicone-oil configurations can be selected.

Railway Application: Designed for rail transportation power systems and related high-voltage equipment.

B2B Applications

This capacitor is suitable for B2B customers involved in the design, manufacture, integration and supply of railway electrical equipment.

Potential customers and applications include:

• Railway equipment manufacturers

• Traction converter manufacturers

• Rail transit system integrators

• Metro equipment suppliers

• Electric train manufacturers

• Tram power system suppliers

• Railway electrical engineering projects

• High-voltage power conversion equipment manufacturers

Product Selection Considerations

Before selecting a DC link capacitor, customers should evaluate the required:

• DC rated voltage

• Capacitance

• Operating temperature

• Installation dimensions

• Housing material

• Mounting configuration

• Impregnation method

• Railway equipment design

• Expected operating life

The final specification should be selected according to the electrical and mechanical requirements of the target system.

About the Manufacturer

Wuxi Power Filtering Co., Ltd. (formerly the Power Filtering Research Institute of Wuxi Power Capacitor Co., Ltd.) is a technology-driven enterprise focused on the research, development and production of special capacitors, high- and low-voltage power filtering devices, and reactive power compensation equipment. The company pioneered research and production in these fields in China.

FAQ

Q1: What is the rated voltage range?
The DC Link Capacitor is available with rated voltages from 1200V to 4000V DC.

Q2: What capacitance range is available?
The rated capacitance range is 1500μF to 6000μF.

Q3: What is the expected lifespan?
The expected lifespan is up to 100,000 hours under specified operating conditions.

Q4: Can it operate in low-temperature environments?
Yes. The specified operating temperature range is -40°C to +70°C.

Q5: What impregnation methods are available?
Available options include dry type, low-density high-performance resin potting, oil-immersed type and silicone oil impregnation.

Q6: What is the main application?
The capacitor is primarily designed for rail transportation power systems, including railway traction and related power conversion equipment.

Product Summary

The DC Link Capacitor provides a high-voltage, high-capacitance solution for rail transportation power systems, with 1200–4000V DC rated voltage, 1500–6000μF capacitance, -40°C to +70°C operation and an expected lifespan of up to 100,000 hours. With flexible housing, mounting and impregnation options, it is suitable for railway traction converters and other demanding power applications. Wuxi Power Filtering Co., Ltd. supplies specialized capacitor and power filtering solutions for industrial and rail transportation applications.