In short: a transformer enquiry that states the rating, voltages, cooling class, tap changer, bushings and test requirements gets a correct offer first time. BTGC supplies HD Hyundai Electric power transformers up to 765 kV and GIS switchgear for utility and industrial substations in the Kingdom.
A power transformer is the most expensive single item in a substation and the one with the longest lead time. An incomplete enquiry means a round of clarifications before the manufacturer can even price it. This checklist is written for the project buyer and the electrical engineer who prepare the RFQ.
The checklist
| Item | What to state | Why it matters |
|---|---|---|
| Rating and voltages | MVA, HV and LV voltages, frequency 60 Hz | Sets the core size and the price |
| Cooling class | ONAN, ONAF or OFAF, and the ambient design temperature | Saudi ambient is 50 °C; standard ratings assume 40 °C |
| Tap changer | On-load or off-circuit, range and steps | Decides regulation and cost |
| Vector group and impedance | Per the grid code or the parallel units | Must match existing transformers |
| Bushings | Porcelain or composite, creepage for the pollution level | Coastal and desert sites need high creepage |
| Protection | Buchholz, pressure relief, winding and oil temperature | Required by SEC and plant standards |
| Tests | Routine, type and special tests to witness | FAT attendance is written into BTGC project scope |
| Transport and site | Dimensions, weight, route and installation | Large units need route surveys |
Ambient temperature is the Saudi difference
Most international ratings assume a 40 °C maximum ambient. Saudi sites see 50 °C and more. A transformer must either be rated for the real ambient or derated on site. State the design ambient in the enquiry and ask for the rating at that temperature, not the catalogue figure.
HD Hyundai Electric from BTGC
HD Hyundai Electric Co., Ltd. of Korea is a tier-one supplier to utility grids and delivers the infrastructure behind power transmission. The range BTGC supplies in the Kingdom covers:
Large oil-filled power transformers up to 765 kV for substations and power plants
Gas insulated switchgear (GIS) for high voltage distribution where space is limited
High voltage motors and generators for industrial applications
Applications in the catalogue include SEC substations, independent power projects and heavy industrial power distribution. See our page for HD Hyundai Electric in Saudi Arabia and the full electrical and power systems offer.
How BTGC handles a transformer package
For a project order BTGC assigns a project manager, an expeditor, a document controller and a QA/QC engineer. The team manages the vendor document list, reviews inspection and test plans, attends factory tests and handles customs clearance to the laydown area. This is the project support described in the BTGC catalogue, and it is how a transformer arrives on the date the schedule says.
BTGC support in Dammam, Jubail and Yanbu
BTGC serves power and water utilities and industrial plants from three branches. Spares such as bushings, gaskets and tap changer contacts can be held in the Kingdom under a supply agreement.
Questions buyers ask
Can BTGC supply distribution transformers too? Yes, locally built distribution transformers up to 36 kV are in the BTGC range alongside the HD Hyundai Electric power transformers.
Who attends the factory test? BTGC's QA/QC engineer, with the client's inspector if required.
What is the lead time? It depends on rating and voltage; large units are long-lead items, so BTGC verifies them months before the installation window.
Contact the BTGC power team
Email power@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.