We build and fit out electrical substations as part of the MEP package, from the civil interface and the transformer through to the main distribution board, the protection settings and energisation.
On most industrial and commercial projects the substation is the single item with the longest lead time and the most external dependencies. Transformer delivery, utility approval, cable route wayleaves and the energisation visit all sit outside the main contractor’s control, and each of them can hold up a building that is otherwise finished.
Green Flash treats the substation as a programme item from the first week rather than an electrical detail at the end. We build and fit out substations as part of the wider electrical package, which means the switchroom, the cable routes, the earthing and the standby supply are coordinated with the mechanical and fire fighting services on the same set of drawings.
Electrical substations are a named scope on our ISO certification, so the inspection and test plan for the switchroom is part of the same audited quality system that covers the rest of the works. That matters on a handover where the client’s insurer or the utility wants to see the records, not just the result.
Oil filled and cast resin dry type transformers, ring main units and MV switchgear, installed, aligned and terminated. We handle offloading and positioning of the transformer, the bund or containment where one is required, and the interface with the utility’s incoming cable.
Main distribution boards, sub main boards, capacitor banks for power factor correction, automatic transfer switches and the standby generator interface. Busbar and cable terminations are made to the manufacturer’s torque figures and recorded.
Protection relay installation and setting to the coordination study, earth mat and earth electrode installation with resistance testing, lightning protection bonding, and metering at the points the client needs for cost allocation.
Cable trenches, trays and ladders, switchroom ventilation or cooling, emergency lighting, fire alarm detection and suppression suitable for electrical rooms, access control and the labelling and mimic diagrams the operator will rely on.
We start from the measured and projected load, apply realistic diversity, and size the transformer, the cables and the protection around it, including the future load the client expects to add. Oversizing costs money every month in no load losses, undersizing costs an outage.
We prepare the drawings and documentation for the Saudi Electricity Company submission, respond to comments and coordinate the programme around the utility’s own milestones. We do not control the approval date, so we build the programme to absorb it rather than assume it.
Equipment positioning, MV and LV cable pulling, jointing and termination by qualified jointers, glanding and earthing. Cable drums are tested on delivery and again after installation, because a cable damaged during pulling is far cheaper to find before it is buried.
Insulation resistance, transformer ratio and winding resistance, protection relay injection testing, earth resistance and phasing checks, followed by the energisation visit and load transfer. The client receives the test sheets, the relay settings, the single line diagram as built and the switching schedule.
Green Flash Engineering and Contracting has completed over 21 major projects across Saudi Arabia, supported by teams operating in Jeddah, Riyadh, Yanbu, Rabigh and King Abdullah Economic City. Substation and distribution work runs through our industrial and power infrastructure portfolios, where the electrical supply is the thing the whole facility depends on.
Our wider power work includes power plant work at Rabigh and refinery and heavy industrial projects at Yanbu, where the electrical installation has to survive a process environment rather than an office one.
Electrical substations are a named scope on our certification. Green Flash is certified to ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 under certificates SCK/01/AWL/25/96/6215, SCK/02/AWL/25/96/6216 and SCK/03/AWL/25/96/6217, issued by SCK Certifications Pvt Ltd and valid to September 2028. Where the same building also needs medical gas pipeline systems or controlled temperature storage, those packages are delivered under the same contract and the same quality system.
We prepare and submit the drawings and documentation and we manage the correspondence through to approval and the energisation visit. The approval itself is issued by the utility, on its own timescale, and no contractor can commit to a date for it. What we can commit to is that the submission is complete and correct the first time, which is where most of the delay actually comes from.
Either. We can procure the full package against the specification, or install and commission free issue equipment the client or the consultant has already selected. If you have a standing supplier agreement we work to it.
Yes, under a permit to work with an agreed isolation and switching plan. Live working is avoided wherever the programme allows a shutdown window. Where no shutdown is possible we plan the work around temporary supply and staged transfer, and the switching schedule is agreed in writing with the operator before anyone enters the room.
Insulation resistance, transformer turns ratio and winding resistance, oil testing where applicable, protection relay secondary injection against the coordination study, earth electrode and earth continuity testing, phase rotation and functional testing of the transfer scheme. All of it is issued as a test pack with the as built single line diagram.
Or just tell us the connected load, the site and when the building needs power. We will tell you what the substation needs to be and where the programme risk sits.
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