Define the assembly functions
Air-insulated switchgear uses air as the primary insulation medium around defined switching, bus, protection, measurement, earthing, and cable interfaces. The component arrangement depends on voltage, fault duty, feeder role, and the project operating philosophy.
Component groups
| Group | Planning role |
|---|---|
| Busbars and compartments | Distribute power and define access boundaries |
| Breakers or switches | Switch or interrupt the defined circuit duty |
| CTs, VTs, and relays | Measure conditions and support protection |
| Earthing and interlocks | Control safe operating states |
| Terminations and surge protection | Connect the external network and manage interfaces |
| Control power and indications | Support local, remote, and maintenance functions |
Scope boundary
Request the single-line diagram, voltage, current, fault duty, cable data, protection functions, environment, and drawings. This guide does not select a device or certify an AIS assembly.
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