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Advanced medium-to-high voltage equipment engineered with resilient insulation to withstand extreme desert ambient temperatures, dust storms, and heavy coastal salinity.
The Kingdom of Saudi Arabia (KSA) is undergoing an unprecedented energy and industrial transformation under the ambitious framework of Saudi Vision 2030. Spearheaded by the Saudi Electricity Company (SEC), the Ministry of Energy, and state-backed mega-developers such as ACWA Power, the national transmission and distribution grid is rapidly expanding. As the Kingdom diversifies into renewable energy mega-projects, petrochemical complexes in Jubail and Yanbu, giga-cities like NEOM, the Red Sea Project, and King Salman Energy Park (SPARK), the demand for accurate, reliable, and compact electrical instrumentation has reached an all-time high.
Within primary distribution networks operating at standard medium-voltage levels—such as 11kV, 13.8kV, 22kV, 33kV, and 34.5kV—the CT-VT Combined Instrument Transformer (frequently referred to as a Metering Outfit, Combined Metering Unit, or MOF) serves as the indispensable nerve center for both revenue metering and network protection. By consolidating current measurement (Current Transformer - CT) and voltage step-down (Voltage/Potential Transformer - VT/PT) into a single compact housing, utility operators and industrial EPC contractors drastically streamline substation real estate, reduce field connection complexities, and eliminate redundant mounting footprints.
As a leading Chinese designer, manufacturer, and exporter, our engineering solutions directly resolve the acute operational challenges posed by Saudi Arabia's unique geography. Our equipment is purpose-built to operate flawlessly under ambient temperatures consistently exceeding 50°C, direct solar radiation generating equipment surface temperatures above 80°C, abrasive sandstorms (Haboob events), high soil thermal resistivity, and saline coastal atmospheres along the Arabian Gulf and Red Sea corridors.
Engineered with Class H and Class F high-grade insulation systems, vacuum-degassed epoxy casting, and specialized thermal dissipation radiators that withstand 55°C ambient temperatures without thermal runaway or accuracy drift.
Hermetically sealed secondary terminal junction boxes rated IP65/IP67, equipped with anti-condensation breathers, stainless steel hardware (SS316), and extended creepage distances (>31mm/kV to 40mm/kV) to prevent flashover in desert and coastal zones.
Utilizing high-permeability grain-oriented silicon steel (CRGO) and premium nanocrystalline cores to deliver uncompromising class 0.2S and 0.5S metering accuracy across extreme load variations, fully compliant with IEC 61869 and SEC standards.
China has emerged as the premier manufacturing powerhouse for smart power transmission and distribution equipment. By harmonizing state-of-the-art automated production, vacuum pressure impregnation (VPI), automated pressure gelation (APG) epoxy casting, and rigorous quality inspection protocols, Chinese instrument transformers offer an unbeatable balance of longevity, reliability, and economic competitiveness for Saudi EPC contractors and industrial end-users.
The primary current windings feature generous thermal ratings with short-time thermal current capabilities up to 31.5kA for 3 seconds, ensuring resilient ride-through during severe downstream phase faults. The voltage transformer elements are optimized with specialized damping features and anti-ferroresonance design principles. In rural Saudi distribution lines subject to severe switching surges and lightning strikes, our proprietary core geometry guarantees rapid flux dissipation and zero core saturation.
| Parameter / Specification | Standard SEC Medium Voltage Grid | Industrial / Aramco Sub-Distribution | Utility-Scale Solar PV Intertie |
|---|---|---|---|
| Rated System Voltage (Un) | 13.8 kV / 33 kV / 34.5 kV | 4.16 kV / 11 kV / 13.8 kV | 33 kV / 34.5 kV / 35 kV |
| Highest Equipment Voltage (Um) | 17.5 kV / 36 kV / 38.5 kV | 7.2 kV / 17.5 kV | 36 kV / 40.5 kV |
| Rated Insulation Level (BIL) | Up to 95 kV / 170 kV / 200 kV peak | Up to 60 kV / 95 kV peak | Up to 170 kV / 200 kV peak |
| CT Accuracy Classes | 0.2S, 0.5S (Metering) / 5P10, 5P20 (Protection) | 0.2, 0.5 / 10P10, 10P20 | 0.2S (Revenue Billing) / 5P20 |
| VT Accuracy Classes | 0.2, 0.5 (Measurement) / 3P, 6P (Relay) | 0.2, 0.5 / 3P | 0.2 (High Accuracy Intertie) / 3P |
| Insulation Medium | Cycloaliphatic Outdoor Epoxy Resin / Mineral Oil | Cast Resin (Dry Type) / Hermetic Oil | UV-Stabilized Hydrophobic Resin / Hermetic Oil |
| Creepage Distance | ≥ 31 mm/kV (Heavy Pollution Class) | ≥ 25 mm/kV (Indoor / Enclosed) | ≥ 35 mm/kV - 40 mm/kV (Desert/Coastal) |
| Ambient Operating Range | -5°C to +55°C (Outdoor Solar Irradiance) | 0°C to +50°C (Controlled Enclosure) | -10°C to +55°C (Continuous Desert Sun) |
Instrument transformers are not one-size-fits-all components. The operational conditions inside an indoor switchgear room in Riyadh differ radically from an outdoor coastal substation in Dammam or an off-grid solar power plant in Tabuk. Here is how our China-engineered CT-VT units excel across primary Saudi sectors:
Under Saudi Arabia’s National Renewable Energy Program (NREP), tens of gigawatts of solar photovoltaic and wind installations are coming online, such as the Sudair 1,800MW PV project, Sakaka, and Al Shuaibah. In these remote desert installations, CT-VT combined units serve as crucial revenue-billing metering nodes at the inverter station step-up interface (33kV/34.5kV to collector buses). They provide precise real-time electrical telemetry to SEC National Control Centers (NCC) and SCADA systems, preventing power quality penalties and ensuring exact kilowatt-hour accounting under shifting irradiance conditions.
At major manufacturing centers operated by SABIC, Ma'aden, and Royal Commission sites, process continuity is vital. Short-circuit faults or voltage sags must be isolated instantaneously. Our combined transformers incorporate dedicated protective cores (5P20 / 10P20) alongside ultra-precise measurement cores, ensuring that differential and directional overcurrent relays trigger reliably without core saturation even under maximum symmetric short-circuit currents.
The transition toward automated grid management led by the Saudi Electricity Company mandates the installation of digital smart metering across commercial, agricultural, and residential feeders. Our outdoor pole-mounted oil-immersed or cast-resin combined metering units are installed directly on overhead 13.8kV and 33kV lines. Housed in weatherproof tanks with anti-vandalism terminal boxes and external grounding lugs, they deliver decades of maintenance-free service without leakage or oil degradation.
Desalination mega-plants along the Red Sea coast (such as SWCC facilities in Shoaiba and Yanbu) endure saline fog, chemical fumes, and intense humidity. We utilize vacuum-cast cycloaliphatic epoxy resin (CEP) with superior hydrophobic properties that inhibit conductive salt-water film formation, drastically reducing dry-band arcing and insulation tracking.
Today, XINSANHUAN’s products are exported to more than 30 countries and regions worldwide. Its international footprint spans Europe, Central Asia, Southeast Asia, Africa, and Latin America, with successful projects completed in countries such as Russia, Kazakhstan, Uzbekistan, Kyrgyzstan, Ethiopia, Zambia, Tanzania, Mexico, Honduras, and many others. The company’s products are widely recognized for their excellent operational performance, high efficiency, durability, and adaptability to diverse climatic and grid conditions.
Building upon decades of manufacturing prestige, we have expanded our dedicated export channels to Saudi Arabia, establishing direct logistics routes to major commercial gateways including Jeddah Islamic Port, King Abdulaziz Port in Dammam, and King Abdullah Port. Our dedicated Middle East engineering desk ensures full documentation compliance with the Saudi Standards, Metrology and Quality Organization (SASO), SABER conformity certification, and pre-qualification alignments for SEC and private utility concessions.
Quality excellence and customer satisfaction remain the core values that guide every aspect of XINSANHUAN’s business operations. Through strict quality assurance, reliable delivery schedules, and comprehensive after-sales support, the company has earned the trust and long-term cooperation of customers around the world. Its commitment to providing dependable products and professional services has established a strong reputation within the global power equipment industry.
Each unit leaves our advanced manufacturing facility only after completing rigorous routine testing under standards exceeding IEC 61869-1, IEC 61869-2, IEC 61869-3, and IEEE C57.13. Testing protocols include power-frequency withstand voltage testing on primary and secondary windings, partial discharge (PD) measurements guaranteeing less than 10pC at 1.2Um/√3, inter-turn overvoltage verification, excitation curve characterization, and high-precision ratio/phase error certification.
Procuring high-voltage and medium-voltage instrument transformers for Saudi Arabian projects requires meticulous alignment with project consultants, utility inspectors, and regional regulatory codes. Below are the key engineering considerations our export specialists review with clients to guarantee hassle-free commissioning:
Choose Outdoor Cycloaliphatic Epoxy (CEP) for maintenance-free compact substations where oil leakage is prohibited. Choose Hermetically Sealed Oil-Immersed Units with stainless steel expansion bellows for heavy-pollution overhead rural feeders requiring extreme impulse withstand.
Modern electronic meters (such as Landis+Gyr, Elster, or EDMI common across SEC infrastructure) require relatively low VA burdens (2.5VA to 10VA). Sizing secondary burdens correctly prevents operating instrument transformers at under-burdened states, ensuring accuracy class 0.2S is maintained throughout the entire duty cycle.
Our export compliance division handles end-to-end documentation including SASO Certificate of Conformity (CoC), product registration on the SABER platform, and commercial invoice legalization, eliminating clearance delays at Saudi customs border posts.
Looking toward the future, Hanzhong Xinsanhuan Transformer Co., Ltd. will continue to uphold its philosophy of integrity, innovation, quality, and customer focus. By leveraging its strong technical expertise, advanced manufacturing capabilities, and global market experience, the company is committed to building long-term partnerships with customers worldwide and contributing to the development of safe, efficient, and sustainable power infrastructure. Together with its partners, XINSANHUAN strives to create greater value and shape a brighter future for the global energy industry.
As Saudi Arabia steps boldly into the next decade of decarbonization, smart cities, and industrial self-reliance, our engineering and manufacturing teams stand ready to supply the backbone of reliable instrumentation—delivering precision, stability, and enduring value to every substation, plant, and community across the Kingdom.
Explore our complete manufacturing lineup of high-voltage transformers, distribution units, and grounding equipment proven across global and Middle Eastern electrical networks.
