11kV to 66kV substation & feeder bay construction.
From civil works and bus-system layout through to switchgear, protection panels and commissioning — Royal Infra Projects builds the substations and feeder bays that switch and step power between the transmission network and the distribution feeders it serves.
Every discipline a substation needs, under one contract.
- Substation civil works — control room, cable trenches, equipment foundations and boundary works.
- Bus system & bay layout — single or double bus arrangements engineered to present and future feeder count.
- Switchgear & bay equipment — circuit breakers, isolators, CTs/PTs and surge arresters installed per bay.
- Feeder bay construction — a dedicated bay per outgoing feeder, so any one circuit can be isolated on its own.
- Control & relay panels — protection wiring and testing, built ready for SCADA/RTU integration.
- Testing & commissioning — insulation and HV testing, relay setting verification, energisation under utility permit.
What sits inside each bay
A substation is really a set of individually protected bays sharing a common bus. Understanding what each one does explains why substation work is a specialist trade.
Incomer Bay
Receives supply from the transmission line or upstream substation, with its own breaker and protection.
Transformer Bay
Houses the power transformer that steps voltage between the incoming and outgoing systems.
Outgoing Feeder Bay
One per outgoing circuit — breaker, isolators, CT/PT and relay dedicated to that feeder alone.
Bus Coupler Bay
Links bus sections so load can be transferred between them without a full outage.
The rest of the network we build.
HT Transmission Line Construction
Route survey, tower and pole erection and conductor stringing for 11kV to 66kV overhead lines.
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Street Lighting & Public Infrastructure
LED street lighting, pole erection, feeder pillars and smart lighting controls.
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Industrial Electrification & Smart Energy Management
Internal HT/LT distribution, power factor correction and energy monitoring that cut costs.
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Solar & Renewable Energy Integration
Rooftop and ground-mount solar EPC, grid interconnection and hybrid-ready systems.
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Energy Audit & Efficiency Solutions
Electrical energy audits and loss-reduction programmes for municipalities and government.
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Common questions on this capability
What is a feeder bay and why does a substation need more than one?
A feeder bay is the section of a substation dedicated to one outgoing or incoming circuit, housing its own circuit breaker, isolators, current and voltage transformers and protection relay. A substation is built with a separate bay for each feeder so a fault on one circuit can be isolated without switching off the others.
What substation voltage classes does Royal Infra Projects construct?
We execute substation civil works, switchgear erection, bay wiring and commissioning across the 11kV, 33kV and 66kV classes, from ring main unit and distribution transformer sites through to full substation compounds.
Is the substation control and relay system ready for SCADA or remote monitoring?
Control and relay panels are wired and tested to accommodate remote telemetry, so a substation can be brought onto a SCADA or RTU-based monitoring system either at commissioning or as a later upgrade.
Building a substation or adding feeder bays?
Share the voltage class and number of feeders and we'll come back with a scoped plan.