10 KV Class Three Phase Distribution Oil Immersed Transformer

Low Loss Performance & Energy Saving

As a core advantage of the 10 kV Class Three Phase Distribution Oil Immersed Transformer, its low-loss design relies on a high-grade cold-rolled silicon steel wound core. The seamless integral core structure eliminates magnetic circuit gaps, reducing no-load loss by 30-40% and no-load current by over 60% compared to traditional laminated core models. This translates to significant energy savings for long-term continuous operation, aligning with global green energy trends and reducing end-user electricity costs.

Advanced Sealing Technology

The transformer adopts a dual-sealing system: high-performance fluororubber gaskets at all joints and laser-welded tank seams, achieving 100% leak-free operation. Hermetically sealed models isolate transformer oil from air, preventing moisture ingress and oil aging, while conservator-type units use a breathing valve to balance internal and external pressure. Both designs ensure oil stability, extending the product’s service life to over 20 years with minimal maintenance.

Heat Dissipation Efficiency

Equipped with corrugated plate radiators, the transformer uses an oil-immersed self-cooled (ONAN) system. The radiators expand and contract with oil temperature changes, replacing traditional oil conservators to save space. The optimized fin layout increases heat dissipation area by 25%, enabling stable full-load operation in -30℃ to +40℃ ambient temperatures. Low operating noise (≤55dB) makes it suitable for both indoor and outdoor installations.

Winding & Insulation Quality

High and low voltage coils are precision-wound with oxygen-free copper wire on core column paper tubes, ensuring tight concentricity and uniform winding. Multi-layer high-density insulation paper and vacuum pressure impregnation (VPI) enhance insulation strength, enabling the transformer to withstand 10 kV rated voltage without breakdown. The winding structure also improves short-circuit resistance, reducing failure risks in complex power grid conditions.

Harsh Environment Adaptability

The tank body undergoes derusting, phosphating, and electrostatic anti-corrosion spraying, with a paint layer thickness of ≥80μm, resisting salt spray, dust, and chemical gas erosion. It performs reliably in coastal areas (salt spray resistance ≥1000 hours), mining sites (dust-proof grade IP44 optional), and high-humidity regions (relative humidity ≤95%). The robust structure also withstands minor vibrations, adapting to industrial and construction site conditions.

About ZISHENG ELECTRICAL

Zisheng are a professional 19+ years manufacturer in producing Oil-Immersed Transformers, Compact Substation, Pad Mounted Transformers, Pole Mounted Transformers and Dry Type Transformers. We own the certificates of ISO/CE/IEC 60076 and TUV Rheinland.
Transformers undergo rigorous FAT and type testing, support voltage/capacity customization. Welcome to consult for Catalog and Product. you can contact us at email info@bdzstransformer.com.

Case 1: PT Indo Prima Teknik (Indonesia)

Customer Profile: A leading manufacturer of automotive parts in Jakarta, with a 50,000㎡ production base and 8 production lines requiring stable 10 kV power supply.

Application Scenario: Factory power distribution system upgrade to support new high-power stamping and welding equipment.

Solution: 12 units of 1000 kVA conservator-type transformers with enhanced moisture-proof treatment.

Results: Operated stably for 24 months, no-load loss reduced by 35% compared to old equipment, annual electricity cost savings of ~$18,000; met Indonesia’s PLN power grid standards with zero downtime.

Case 2: Saudi Electricity Company (SEC)

Customer Profile: Saudi Arabia’s national power utility, responsible for Riyadh’s urban power grid expansion to serve 200,000 new residents.

Application Scenario: 10 kV residential distribution substation construction in high-temperature desert areas.

Solution: 18 units of 1600 kVA hermetically sealed transformers with optimized heat dissipation and salt spray-resistant coating.

Results: Passed SABER certification, operated at 45℃ ambient temperature with stable performance; delivery completed in 28 days, supporting on-schedule grid commissioning.

Case 3: African Mining Services (Kenya)

Customer Profile: A gold mining enterprise with operations in Nairobi’s outskirts, requiring reliable power for mining machinery and on-site living quarters.

Application Scenario: Outdoor power supply station in a dusty, vibrating mining environment.

Solution: 8 units of 800 kVA transformers with reinforced tank structure, dust-proof radiators, and overload capacity upgraded to 130%.

Results: Stable operation under intermittent peak loads (120% rated power for 4 hours/day), dust-proof design reduced maintenance frequency by 50%; compatible with local diesel generator sets.

Case 4: European Business Park (Belgium)

Customer Profile: A mixed-use business park in Antwerp, housing 30+ SMEs (logistics, electronics, office spaces) with strict noise and energy efficiency requirements.

Application Scenario: Central power distribution for the park’s 10 kV grid, with indoor installation in a shared electrical room.

Solution: 6 units of 500 kVA low-noise transformers (≤45dB) with CE and RoHS certification.

Results: Met EU environmental standards, noise levels below park regulations; low-loss design contributed to the park’s “Green Building” certification, reducing collective electricity costs by 12%.

Rated Power (kVA)	Rated High Voltage (kV)	Rated Low Voltage (kV)	Connection Symbol	Short Circuit Impedance (%)	No Load Current (%)	No Load Loss (W)	On-Load Loss (W)	Cooling Mode	Tank Type
30	10/10.5	0.4	Dyn11/Yyn0	4.0	2.1	100	600	ONAN	Sealed/Conservator
50	10/10.5	0.4	Dyn11/Yyn0	4.0	2.0	130	870	ONAN	Sealed/Conservator
100	10/10.5	0.4	Dyn11/Yyn0	4.0	1.6	200	1500	ONAN	Sealed/Conservator
250	10/10.5	0.4	Dyn11/Yyn0	4.0	1.2	400	3050	ONAN	Sealed/Conservator
500	10/10.5	0.4	Dyn11/Yyn0	4.0	1.0	680	5150	ONAN	Sealed/Conservator
800	10/10.5	0.4	Dyn11/Yyn0	4.0	0.8	980	7500	ONAN	Sealed/Conservator
1000	10/10.5	0.4	Dyn11/Yyn0	4.5	0.7	1150	10300	ONAN	Sealed/Conservator
1600	10/10.5	0.4	Dyn11/Yyn0	4.5	0.6	1640	14500	ONAN	Sealed/Conservator
2000	10/10.5	0.4	Dyn11/Yyn0	5.0	0.6	1940	17140	ONAN/OFAF	Sealed/Conservator
2500	10/10.5	0.4	Dyn11/Yyn0	5.0	0.5	2300	20260	ONAN/OFAF	Sealed/Conservator
Note: All parameters comply with IEC 60076-1/2 standards. Custom voltage grades (6kV/11kV) and technical parameters are available upon request.

We are a professional manufacturer with a 15,000㎡ production base in Baoding, China. We have independent R&D, production, and testing facilities—no middlemen, so we offer factory-direct pricing and full customization control.

Standard models in stock: 15-20 working days; customized orders (e.g., special voltage, enhanced anti-corrosion): 25-35 working days. Urgent orders can be prioritized with a 10-day expedited option.

Our products have CE (LVD/EMC), SGS, RoHS, and ISO 9001 certifications. For regional markets: SABER (Middle East), UL/CSA (North America), and UKCA (UK) are available upon request to ensure market access.

Yes. For high-temperature areas (≥45℃), we optimize heat dissipation with additional fins or fans; for coastal salt spray environments, we apply a 3-layer anti-corrosion coating; for dusty mining sites, we offer IP44 dust-proof protection and reinforced tank structures.

We have technical teams in Southeast Asia, the Middle East, and Africa, offering on-site installation guidance, commissioning, and maintenance. All products come with a 12-month warranty, and we provide lifelong technical support and spare parts supply.

Routine maintenance is simple: 1) Check oil level (conservator type) and temperature monthly; 2) Inspect sealing joints for leaks quarterly; 3) Clean radiators annually (more frequently in dusty areas); 4) Hermetically sealed models require no oil replacement under normal use.

Hermetically sealed: No air contact, no oil supplement needed, longer life (20+ years), ideal for harsh environments. Conservator type: Cost-effective, uses a breathing valve to balance pressure, suitable for general indoor/outdoor applications with regular inspections.

Yes. It is compatible with renewable energy grids, with optimized voltage regulation to handle fluctuations from solar/wind power. We can also customize the short-circuit impedance to match your system’s requirements.