An outdoor switchyard steps down utility HT (66/33/11 kV) for the plant through isolators, breakers, instrument transformers, lightning arresters and power transformers on a common earth mat.

Switchyard 66/33/11 kV Power Transformer CT/PT & Protection Relays Earth Mat Gantry & Structures

Overview Selection guide Key standards Design rules of thumb & formulas Buyer's checklist FAQs

Links

Calculators: Switchyard 66/33/11 kV calculator · Power Transformer calculator · CT/PT & Protection Relays calculator · Earth Mat calculator · Gantry & Structures calculator

Catalogue categories: Switchgear, Transformers, Cables, Earthing

Products for this system

BI Cable tray
Legrand Legrand Plexo IP65 weatherproof enclosure 2 module
Legrand Legrand DX3 Alpharex D21 1 channel
Legrand Legrand MCB DX3 C-curve
Polycab FRLS Armoured Shielded Cable 2C x 1.5 sq mm
GI Conduit 25 mm
Junction Box 8x10x4 in / Weatherproof JB
GI Earthing Strip 50 x 6 mm

Cable size calculator Substation civil and erection

Products and services

Substation civil and erection
Electrical products

Standards cited by number for reference; verify designs with a qualified engineer.