Switchgear Components are different based on switchgear types. The switchgear are categorized by voltage levels into Low Voltage (LV), Medium Voltage (MV), and High Voltage (HV) systems, each containing specialized components tailored for operational safety and system reliability. This article will introduce LV/MV/HV switchgear components.
Low Voltage Switchgear Components
Low Voltage Switchgear, typically rated up to 1000V, includes the following essential components:
- Control Circuit Compartment: Houses control wiring and auxiliary devices for operational control and protection.
- Busbar Compartment: Facilitates reliable power distribution via insulated or bare busbars.
- Air Circuit Breaker (ACB) Compartment: Contains ACB units for switching and protecting circuits under load conditions.
- Cable Compartment: Provides secure cable entry and termination with proper insulation and mechanical support.
- Terminal Block Compartment: Enables organized and safe wiring connections for control and power circuits.
Medium Voltage Switchgear Components
Medium Voltage Switchgear (3.6kV to 40.5kV) typically integrates:
- Low Voltage Compartment: Contains control and auxiliary equipment to manage the medium voltage switchgear operations.
- Apparatus Compartment: Houses main switching devices such as vacuum circuit breakers or SF6 circuit breakers.
- Cable Compartment: Ensures proper termination and routing of medium voltage cables with safety and reliability.
- Busbar Compartment: Supports power distribution with appropriately rated busbars.
- Current Transformer (CT) and Voltage Transformer (VT): Provide accurate measurement and protection inputs for system monitoring and relay operation.
High Voltage Switchgear Components
High Voltage Switchgear (≥ 40.5kV) is composed of:
- Busbar Compartment: Designed to handle high electrical loads with optimal insulation and mechanical strength.
- Vacuum Contactor Compartment: Contains vacuum contactors for efficient switching and fault interruption in HV circuits.
- Cable Compartment: Provides secure cable terminations designed for high voltage safety standards.
- Low Voltage Compartment: Supports auxiliary control and protection devices essential for HV switchgear functionality.
Which switchgear components Sell-Best provides
Sell-Best specializes in supplying a comprehensive range of high-performance, IEC-standard certified medium and high voltage switchgear components to international markets. Our product portfolio covers:
- Vacuum Circuit Breakers (VCB): Available in fixed and withdrawable types, suitable for indoor switchgear cabinets and outdoor applications.
- Load Break Switches (LBS): Reliable, compact designs for medium voltage network switching and isolation.
- SF₆ Circuit Breakers: High-capacity fault protection for critical distribution systems.
- High Rupturing Capacity (HRC) Fuses and Fuse Bases: For transformer, motor, and feeder circuit protection.
- Current Transformers (CT) & Voltage Transformers (VT/PT): Available in various accuracy classes and insulation levels, for metering and protection.
- Surge Arresters: Metal-oxide type with silicone housing, for lightning and switching surge protection.
- Earthing Switches (Manual and Motorized): Interlocked types for personnel safety during maintenance.
- Gas-Insulated Switchgear (GIS) Components: Busbars, disconnector switches, earthing switches, and arc extinguishing chambers.
- Control and Auxiliary Relays: For protection, control interlock, and signaling functions.
- Microprocessor-based Comprehensive Protection Devices: Multi-function protection units integrating overcurrent, earth fault, and voltage protection in a single device.
Additionally, Sell-Best provides complete secondary wiring materials, trip relays, energy storage mechanisms, motor operators, insulation parts, and switchgear assembly accessories, supporting international OEMs, EPC contractors, and substation projects globally.
