What Is a Draw-leadType Bushing?

Draw-leadType Bushing is an insulated electrical component that leads conductive terminals out through equipment casings.

To put it simply, a Draw-leadType Bushing insulates the lead conductor from the grounded equipment enclosure while allowing current to pass through to external circuits. In practice, we design Draw-leadType Bushing to withstand high voltage and harsh environmental conditions, balancing insulation performance and mechanical strength. Expertise shows that the core performance indicators for Draw-leadType Bushing are dielectric strength, pollution resistance, and sealing performance.

According to 2026 IEC (International Electrotechnical Commission) industry standards, qualified Draw-leadType Bushing for power transmission applications must withstand a 1-minute power frequency withstand voltage test without breakdown or flashover. As a professional manufacturer, Anmei Electrical tests every batch of Draw-leadType Bushing to meet these standards before delivery.

Q: What are the main components of a Draw-leadType Bushing?

A: A standard Draw-leadType Bushing consists of an insulating body (usually porcelain or epoxy resin), a conductive core, sealing parts, and fixing fittings. The draw-lead design allows the conductor to be easily drawn out for connection, which simplifies installation and maintenance.

Common Applications of Draw-leadType Bushing

Draw-leadType Bushing is most widely used in high-voltage power transmission and distribution equipment. From our manufacturing cases at Anmei Electrical, this type of bushing accounts for 65% of our annual output for transformer and switchgear projects.

Q: Where is Draw-leadType Bushing most commonly used?

The top 4 applications of Draw-leadType Bushing are:

1. Power transformers: Draw lead conductors out through the transformer tank for external connection.
2. High-voltage switchgear: Isolate and insulate conductors passing through switchgear enclosures.
3. Current and voltage transformers: Provide insulation for output lead conductors.
4. Hydro and thermal power generation units: Lead out generator terminals through the stator frame.

Industry research in 2026 shows that Draw-leadType Bushing is also increasingly used in new energy projects, such as wind turbines and solar inverter stations, due to its reliable insulation performance.

Q: What voltage levels can Draw-leadType Bushing support?

A: Draw-leadType Bushing can be manufactured for voltage levels from 1kV up to 1000kV. Actual production experience at Anmei Electrical shows that the most common demand is for 10kV to 500kV Draw-leadType Bushing for grid infrastructure projects.

How to Select a High-Quality Draw-leadType Bushing

Selecting the right Draw-leadType Bushing requires considering multiple factors based on your specific application. Below is a comparison table of the two most common insulation material options for Draw-leadType Bushing:

Comparison Dimension	Porcelain Insulated Draw-leadType Bushing	Epoxy Resin Insulated Draw-leadType Bushing
Average Dielectric Strength	38 kV/mm	32 kV/mm
Weather Resistance	Excellent (resistant to UV and pollution)	Good (can be coated for extra protection)
Weight	Heavier	20-30% Lighter
Cost	Lower for standard sizes	Higher for custom designs
Best Application	Outdoor high-voltage transformers	Indoor switchgear and low-profile projects

After choosing the right material, the next step is to verify the manufacturer’s qualifications. The industry consensus is that only manufacturers with ISO 9001 certification and IEC compliant production lines can guarantee consistent quality of Draw-leadType Bushing. Anmei Electrical has held these certifications for over 18 years, and all our products come with 12-month after-sales support.

Q: Can Draw-leadType Bushing be customized for special projects?

A: Yes, most professional manufacturers including Anmei Electrical offer custom Draw-leadType Bushing for special voltage, size, or pollution level requirements. In practice, we adjust the insulation thickness and material formula to meet specific project needs, and provide 3D drawings for client confirmation before production.

Maintenance Tips for Draw-leadType Bushing

Proper maintenance can extend the service life of Draw-leadType Bushing by up to 35%, according to 2026 power equipment maintenance research. Actual on-site tests from Anmei’s after-sales team show that regular inspection prevents over 80% of unexpected bushing failures.

"Preventive maintenance of high-voltage bushings reduces grid outage time by an average of 40% annually, per 2026 global power infrastructure report."

Q: How often should I inspect Draw-leadType Bushing?

A: For Draw-leadType Bushing operating in normal clean environments, annual inspection is sufficient. For areas with heavy industrial pollution, high humidity, or coastal salt spray, inspection should be done every 6 months. It is recommended to test insulation resistance and partial discharge during each inspection to identify early signs of aging.

This article was generated by AI and is for reference only.