35kV High Voltage Switchgear

35kV systems are commonly used in large industrial facilities, regional substations, power generation facilities, and other applications requiring higher power transmission and distribution capacity. Compared with 10kV systems, 35kV switchgear requires greater attention to insulation coordination, creepage distance, switching performance, mechanical reliability, and operational safety.

Hagoe Electric KYN61-40.5 35kV High Voltage Switchgear adopts an armored, withdrawable, metal-enclosed construction. The main functional sections, including the circuit breaker, busbar, cable connection, and control compartments, are arranged as separate functional areas to support organized operation and maintenance.

The withdrawable construction is particularly suitable for distribution systems requiring regular switching and maintenance. The circuit breaker truck can be moved between operating and test positions according to operating and maintenance requirements, helping reduce the impact of equipment servicing on the overall distribution system.

Structural Design for Safer Maintenance

The 35kV High Voltage Switchgear design focuses not only on enclosure protection but also on the internal management of high-voltage functional areas through metal enclosure, armored separation, and withdrawable construction.

For engineering applications, this configuration addresses three practical requirements.

Functional separation: High-voltage busbars, circuit breakers, and cable connection areas are arranged as dedicated sections, helping maintain clear separation between different electrical functions.

Maintenance access: The withdrawable circuit breaker truck allows operators and maintenance personnel to move the breaker to the required position for inspection or servicing without dismantling the complete switchgear enclosure.

Operational safety: The metal-enclosed construction provides physical separation from internal energized components. The mechanical arrangement can also be coordinated with the electrical and mechanical interlocking requirements of the project.

A 35kV switchgear is more than a conventional distribution cabinet. Depending on the primary electrical design, it can be configured for incoming feeders, outgoing feeders, bus couplers, and other functional circuits. It works together with protection relays, metering, monitoring, and automation systems to control and distribute electrical power.

Typical applications include:

• 35kV substation incoming and outgoing feeders
• High-voltage distribution systems for industrial facilities
• Auxiliary power and distribution systems in power plants
• Mining and large-scale production facilities
• Regional power distribution installations
• High-voltage systems requiring frequent switching

For large projects, Hagoe Electric can match the switchgear configuration to system capacity, short-circuit parameters, feeder arrangement, protection requirements, and available installation space rather than selecting the cabinet based on rated voltage alone.

Technical parameter

Service Environment

• Ambient Temperature: Upper limit of +40°C, with a daily average not exceeding +35°C; lower limit -15°C.
• Altitude: ≤ 2,000 m.
• Relative Humidity: Daily average not exceeding 95%; monthly average not exceeding 90%.
• Earthquake Intensity: Not exceeding 8°.
• Water Vapor Pressure: Daily average not exceeding 2.2 kPa; monthly average not exceeding 1.8 kPa.
• Environmental Conditions: The installation site shall be free from fire and explosion hazards, severe pollution, chemical corrosion, and severe vibration.

Why a 35kV Withdrawable Switchgear Configuration?

For engineering procurement, neither fixed nor withdrawable high-voltage switchgear is universally superior. The appropriate configuration depends on maintenance strategy, operational continuity, switching frequency, and service requirements.

The main advantages of a 35kV withdrawable configuration include:

Improved maintenance flexibility: The circuit breaker truck can be withdrawn from the operating position for inspection and servicing.

Modular functional configuration: Multiple panels can be configured for incoming feeders, outgoing feeders, bus couplers, and other circuits within the same project.

Suitability for larger distribution systems: Multiple switchgear panels can be arranged into an integrated distribution system for substations, industrial parks, and large industrial facilities.

For this reason, the selection of 35kV High Voltage Switchgear should consider rated voltage, rated current, short-circuit breaking capacity, short-time withstand current, peak withstand current, insulation requirements, installation conditions, and protection configuration, rather than comparing cabinet dimensions or purchase price alone.

Engineering Configuration and Technical Support

Since its establishment in 2008, Hagoe Electric Technology Co., Ltd. has focused on power transmission and distribution, power electronics, and new energy electrical equipment. With more than 18 years of industry experience and over 34 national patents, the company has developed an integrated R&D, manufacturing, testing, and international service system.

For 35kV switchgear projects, our engineering support covers more than equipment manufacturing. Based on the customer's primary system information, our technical team can assist with:

System parameters → Switchgear configuration → Primary scheme → Secondary protection → Panel arrangement → Installation conditions → Factory testing → Project delivery

The manufacturing base is equipped with Trumpf laser cutting machines, AMADA CNC bending machines, automated punching equipment, and electrical testing equipment, supporting cabinet fabrication, structural production, and product testing.

Hagoe Electric also operates under ISO9001, ISO14001, and ISO45001 management systems and maintains product compliance capabilities including CCC, CE, CB, and RoHS, providing supporting documentation for projects in different markets.

FAQ 

1. What is 35kV High Voltage Switchgear?

35kV High Voltage Switchgear is an armored withdrawable AC metal-enclosed high-voltage switchgear designed for 40.5kV, 50Hz three-phase AC systems. It is mainly used for power receiving, distribution, control, protection, and monitoring.

2. Where is 35kV switchgear normally used?

Typical applications include power plants, substations, large industrial facilities, mining operations, and other installations requiring 35kV-class power receiving and distribution.

3. Why use withdrawable switchgear?

The withdrawable design facilitates circuit breaker maintenance, testing, and replacement while supporting standardized equipment management in larger distribution systems.

4. What environmental conditions does the KYN61-40.5 33kv indoor vcb Switchgear panel support?

The standard operating conditions include an altitude of up to 2000m and an ambient temperature range of -15°C to +40°C, together with specified humidity and environmental conditions. Special environments should be confirmed during project engineering.

5. Can Hagoe Electric customize a 35kV switchgear system?

Yes. Cabinet configuration, incoming and outgoing feeder arrangements, primary electrical schemes, secondary control, and protection configurations can be matched to project requirements.

6. What documents can be provided for a 35kV project?

Depending on project requirements, Hagoe Electric can provide technical documentation, certification documents, inspection reports, factory documentation, and relevant engineering files for technical review, procurement, and project acceptance.