Dammam-based Saudi Transformers Company (STC) specialises in pad-mounted distribution transformers, oil-filled distribution transformers, pole-mounted transformers, compact substations and low voltage panels.

The company stresses that its products conform to the latest international specifications (IEC/ANSI), and follow the specifications of Saudi Arabian Standards Organisation (Saso).
The pad-mounted transformers are compartment-type, self-cooled and tamper-resistant with electrical characteristics ranging from KVA 75 to 2000.
 They are rated for continuous operation at full load at 65 degrees C temperature rise with a 24-hour average ambient temperature of 30 degrees C without loss of life expectancy. Their primary side is dead front or live front and arranged for loop or radial feed.
The transformers have a sealed tank construction while the minimum tank withstand pressure is in accordance with ANSI standards. A gasketed hand-hole cover is provided.
The compartments are designed for security and smooth operations. The high and low voltage cable-terminating compartments are located side-by-side and separated by a rigid metal barrier. Each compartment has a separate door, designed to provide access to the high voltage compartment only after the low voltage door has been opened. The low voltage door has a handle-operated three-point latching mechanism that can be secured with a single padlock and both doors are equipped with lift-off stainless steel hinges and doorstoppers to secure them in the open position. The doors are mounted flush with the cabinet frame. The compartments are designed for cable entry from the bottom and are sized to the minimum dimensions.
STC’s oil-filled transformers are three-phase, oil-immersed and naturally cooled. The company manufactures these under a licensing agreement with Pauwels International, Belgium. The production process complies with IEC 60076 and Saso standards and all technical tolerances are in accordance with IEC 60076. While the range is from 50 KVA to 3,150 KVA, the maximum voltage is 36 KV.
The core is manufactured from cold-rolled grain-oriented  (CRGO) silicon steel. The windings are made of high-grade electrolytic copper and concentrically positioned and the tank is of hermitically sealed design and made from corrugated steel sheets. The construction allows a degree of flexibility needed to accommodate the expansion and contraction of oil due to varying service conditions. The tank cover is bolted to the body of the tank.
The company’s pole-mounted transformers are designed as per IEC 60076 standards with high voltage and low voltage bushings on the top. They are available in the KVA range of 50 to 500, primary voltage of 2.4 to 33 KV, secondary voltage of 0 to 500 V and insulation in Class A.
 STC’s offering of low voltage distribution panels covers products for any application ranging from a simple-flush mounted distribution panel to 4,500 A 16-way panels for industrial use.
The panels are totally metal sheet enclosed, factory-assembled and fully tested before dispatch. High-grade galvanised steel or aluzinc steel is used for the metal work while dimensions and layout are customised. The panels also provide protection against dust and water in standard enclosures from IP42 to IP54.
The LV panels are designed, manufactured and tested in accordance with all international standards. They are available in standalone version (feeder pillars) as well as compact substations (CSS) version suitable for both indoor and outdoor use. The components are of high quality and come from reputable manufacturers.
STC’s compact substations are self-contained units, each comprising three individual main assemblies. A typical substation would include one hermetically sealed transformer, one metal-clad SF6 insulated ring main unit and one metal-clad low voltage distribution panel.