“Transformers and switchgear are essential components of electrical power systems. The specific equipment required can vary depending on the size and complexity of the installation, but here is a list of common equipment used for transformers and switchgear:

Transformers:

Power Transformers: These are used for stepping up or stepping down voltage levels in power transmission and distribution systems.
Distribution Transformers: Smaller transformers used to step down voltages for local distribution.
Instrument Transformers: Current transformers (CTs) and voltage transformers (VTs) used for measurement and protection purposes.
Auto-Transformers: Used for voltage regulation and can have a single winding with multiple taps.
Oil-Filled Transformers: Transformers with oil as an insulating and cooling medium.
Dry-Type Transformers: Transformers with solid insulation material, no oil, and suitable for indoor use.
Pad-Mounted Transformers: Transformers installed on the ground and encased in protective cabinets for outdoor use.
Pole-Mounted Transformers: Transformers mounted on utility poles for distribution purposes.
Switchgear:

Circuit Breakers: Devices used to interrupt electric currents in case of faults or overloads.
Disconnect Switches: Used for isolating electrical equipment for maintenance or repair.
Load Break Switches: Designed to open and close under load conditions, often used in distribution networks.
Fuses: Overcurrent protection devices that melt when current exceeds a certain level.
Protective Relays: Monitors electrical parameters and triggers circuit breakers or switches during abnormal conditions.
Busbars: Conductors used to distribute electrical power within the switchgear assembly.
Control Panels: Panels that house switches, relays, and other control devices for operating and monitoring the switchgear.
Surge Arresters: Devices used to protect equipment from transient overvoltage caused by lightning or switching events.
Interlocking Systems: Ensures correct sequence and operation of switching operations to prevent accidents.
Protection and Control:

Protection Relays: Overcurrent relays, differential relays, distance relays, etc., for protection against faults.
Control Relays: Used for control functions like starting and stopping motors or signalling operations.
SCADA (Supervisory Control and Data Acquisition) System: For monitoring and controlling electrical parameters remotely.
Accessories and Ancillary Equipment:

Cooling Systems: Fans or radiators to dissipate heat from transformers.
Buchholz Relay: Used to detect internal faults in oil-filled transformers.
Conservator Tank: A tank connected to the transformer to compensate for oil volume changes due to temperature variations.
Oil Filtration and Purification Systems: Used for maintenance of oil-filled transformers.
Keep in mind that this list is not exhaustive and can vary depending on the specific application and requirements. Additionally, advancements in technology might introduce new equipment or modify existing ones. Always consult with electrical engineers and experts for specific project needs and considerations.”