This article provides a list of essential devices commonly used in electrical switchgear. Learn about the various components that make up switchgear systems and their functions.
Devices in Electrical Switchgear
Electrical switchgear is a collection of equipment used to control, protect, and isolate electrical circuits.
The devices commonly used in electrical switchgear include:
- Circuit breakers
- Isolators or disconnectors
- Load disconnect switches
- Surge arresters
- Fuses
- Protective relays
- Busbars
- Current transformers
- Voltage transformers
- Lightning arresters
- Control switches and push buttons
- Instrument transformers
- Capacitors
- Contactors
- Motor starters
- Power transformers
- Bus ducts
- Shunt reactors
- Surge capacitors
- Air break switches
- Vacuum circuit breakers
- Gas-insulated switchgear (GIS)
- Neutral grounding resistors
- Battery chargers
- Multifunction meters
- Potential transformers
- Overcurrent protection devices
- Ground fault protection devices
- Automatic transfer switches
- Earthing switches
- Maintenance switches
- Annunciator panels
- Synchronizing panels
- Voltage regulators
- Remote terminal units (RTU)
- Power factor correction capacitors
- Battery backup systems
- Energy meters
- Load shedding controllers
- Harmonic filters
- Lightning protection systems
- Transformer monitoring systems
- Protective enclosures and cabinets
- Relay test sets
- Transient voltage surge suppressors (TVSS)
- Human-machine interface (HMI)
- Thermal imaging cameras
- Gas detectors
- Insulation testers
- Megohmmeters
- Cable fault locators
- Ground resistance testers
- Infrared thermometers
- Phase sequence meters
- Motor protection relays
- Voltage dividers
- Insulation piercing connectors
- Terminal blocks
- Surge arresters
- Arc flash sensors
- Power quality analyzers
- Electric power meters
- Harmonic analyzers
- Differential protection relays
- Motor control centers (MCCs)
- Power monitoring systems
- Programmable logic controllers (PLC)
- Motor starters
- Disconnect switches
- Electronic trip units
- Time delay relays
- Contactors
- Switched-mode power supplies (SMPS)
- Motor soft starters
- Motor control panels
- Voltage regulators
- Overcurrent protection relays
- Earth leakage circuit breakers (ELCB)
- Circuit breaker analyzers
- Power transformers
- Variable frequency drives (VFD)
- Programmable electronic trip units (PETU)
- Control transformers
- Distribution panels
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