• Product advantages
• Product parameters
• Ordering instructions

Product advantages

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Why Choose Our 1500KVA  Three Phase Pad Mounted Transformer?
Leading Technology
• Fully enclosed & insulated structure – safe and reliable operation
• Low loss, low noise, low temperature rise
• High overload capacity & strong short-circuit withstand capability

Flexible System Integration
• Supports terminal system or ring network system
• Easy configuration switch – improves power supply reliability

Heavy-Duty Enclosure
• Material: cold-rolled, hot-dip galvanized steel
• Laser-cut CNC drilled and bent panels
• Electrostatic spray coating –30 years paint life
• Core unit: low loss oil-immersed transformer from Hengfengshuai Electric

Precision Manufacturing
• Assembly technicians: minimum 6 months training
• Secondary wiring: automatic cutting for reliable connection
• Bolt tightening: power tools with precise torque control
• Copper busbar: CNC punched and bent
• 100% pre-delivery testing


Company Advantages – Built for Global Buyers
• Certifications |ISO, CE, CB, UL |
• Quality System | SQA management – guaranteed consistency |
• Fast Response | Quick quote + electrical design support |
• Delivery | Short lead time, worldwide shipping |
• After-Sales | Complete service system |
• Customization | OEM/ODM – factory visit welcome |


1500KVA Three Phase Pad Mounted Transformer Case



1500KVA  Three Phase Pad Mounted Transformer FAQ

1. Standard & Certification

Q1: What international standards does your 1500kVA three-phase pad-mounted transformer comply with? Is it eligible for commercial and industrial grid interconnection?
A1: Our 1500kVA medium-large capacity pad-mounted transformers are engineered and tested in strict accordance with ANSI/IEEE C57.12 series, UL 1551, CSA C227.4 and the latest DOE premium energy efficiency standards, fully compliant with North American commercial and industrial grid distribution codes. It also meets global mainstream specifications including IEC 60076, EN, GOST and AS/NZS. Positioned between medium-capacity civil transformers and 2000kVA+ heavy-duty grid transformers, this 1.5MVA model is professionally optimized for large commercial complexes, medium-sized industrial parks and distributed PV power stations, balancing energy efficiency, load redundancy and cost-effectiveness. We provide complete standard compliance certificates and verification documents to support global grid approval, project bidding and official engineering acceptance.
Q2: Can you provide full type test reports and third-party witnessed FAT inspections for the 1500kVA model?
A2: We supply full CNAS-accredited type test reports, DOE energy efficiency certification and grid compliance documents covering all core indicators: medium-heavy load temperature rise, no-load & load loss, impedance accuracy, lightning impulse withstand, partial discharge and short-circuit endurance. For commercial EPC projects, medium-sized industrial supporting projects and MW-level photovoltaic grid-tie projects, we fully support on-site FAT witnessing and third-party verification by SGS, BV and TUV. All test data strictly follows medium-large capacity pad-mounted transformer industry standards to ensure stable long-term operational performance.
Q3: What technical documents are included in delivery? Are multi-language engineering manuals available?
A3: The standard delivery package includes a complete set of English professional technical documents: equipment nameplate, foundation installation layout drawing, dimension outline drawing, high/low voltage wiring schematic, structural drawing, full-item FAT test report, operation and maintenance manual and spare parts list. We support customized Spanish, Portuguese, Arabic and French engineering manuals, tailored for commercial property operation, industrial EPC teams and overseas municipal engineering projects, with targeted maintenance guidelines for 1500kVA medium-heavy load operating characteristics.

2. Technical Performance & Structural Advantages

Q4: What winding options are available for the 1500kVA pad-mounted transformer? Can it sustain long-term medium-heavy load operation?
A4: This 1500kVA medium-large capacity model offers two mature industrial-grade winding solutions: high-purity oxygen-free copper winding (preferred for long-term continuous medium-heavy load and frequent peak load scenarios) and high-strength reinforced aluminum winding (cost-effective for stable commercial and industrial fixed loads). Copper winding delivers lower operating loss, better heat dissipation efficiency and stronger short-circuit resistance, perfectly adapting to 24/7 continuous operation of large shopping malls, factory production lines and medium-sized new energy stations. All winding materials are fully traceable with complete qualification certificates. Equipped with upgraded H-class insulation system and vacuum pressure impregnation process, the transformer effectively resists insulation aging under long-term medium-heavy load operation.
Q5: Can core electrical parameters be customized for commercial and medium industrial scenarios? How do you handle non-conforming products?
A5: All core electrical parameters support personalized customization for diversified medium-heavy load scenarios. Common primary voltage covers 12.47kV, 13.2kV, 13.8kV and 24.9kV; secondary voltage supports 480Y/277V, 600V and 400V, matching large commercial power supply, medium industrial equipment and distributed PV grid-tie standards. No-load loss, load loss and short-circuit impedance can be adjusted to meet local grid energy-saving and safety requirements. Every unit undergoes 100% full-load aging test and strict factory inspection before delivery. Non-compliant products will be fully reworked or replaced free of charge with zero defective delivery.
Q6: Can the 1500kVA transformer adapt to complex outdoor harsh environments?
A6: Designed for outdoor unattended medium-heavy load operation, this 1500kVA model has excellent comprehensive environmental adaptability with targeted optimization schemes. It adopts C5M high-grade anti-corrosion spraying and salt-fog resistant sealing structure for coastal industrial and commercial areas; enhanced heat dissipation system and high-temperature resistant insulation for tropical high-temperature regions; fully sealed waterproof, dust-proof and moisture-proof integrated structure to resist rainwater, condensation and industrial dust erosion; reinforced base and multi-point shock absorption structure for suburban seismic zones and road vibration environments. It balances anti-corrosion, weather resistance and cost, fully suitable for long-term outdoor operation of commercial and medium industrial projects.
Q7: Is the 1500kVA model suitable for medium-scale PV grid-tie and industrial harmonic load conditions?
A7: This 1500kVA transformer is specially optimized for medium-scale distributed photovoltaic systems and industrial nonlinear medium loads. The optimized low-loss core and symmetrical winding structure can effectively suppress conventional high-order harmonics generated by PV inverters, industrial frequency conversion equipment and commercial high-power electrical devices, reducing harmonic overheating and voltage waveform distortion. It stably copes with intermittent power fluctuation of medium-sized new energy stations and frequent load changes of commercial and industrial facilities, with stronger harmonic tolerance than medium-capacity transformers and higher operational efficiency than oversized 2000kVA models under partial load conditions.
Q8: What is the full-load noise level? Is ultra-low-noise configuration available for urban commercial and industrial mixed zones?
A8: Under standard ANSI/IEC full-load test conditions, the operating noise of the 1500kVA pad-mounted transformer is ≤53dB, achieving a balance between power capacity and mute performance. For noise-sensitive urban scenarios such as commercial districts, industrial-residential mixed areas and scenic supporting facilities, we provide customized ultra-low-noise upgrade scheme (≤47dB), adopting integral floating damping base, core anti-vibration fixation and multi-layer noise reduction structure. Official noise test certificates can be provided for environmental assessment and project acceptance.
Q9: Does the 1500kVA transformer have reliable lightning protection and short-circuit resistance?
A9: Equipped with upgraded outdoor heavy-duty lightning impulse insulation and high-capacity overvoltage protection devices, the 1500kVA model effectively resists outdoor lightning strikes and grid switching overvoltage. The reinforced anti-deformation winding structure and internal locking design significantly improve short-circuit fault withstand capability, coping with sudden short-circuit faults caused by grid line aging and medium industrial load abnormalities. It fully meets urban commercial and industrial grid operation standards, with complete lightning impulse and short-circuit endurance test reports available.
Q10: What is the design service life of the 1500kVA pad-mounted transformer?
A10: The standard design service life is 28 years, between conventional medium-capacity and heavy-duty grid transformers. Adopting high-stability oil-paper composite insulation and following the international 6℃ insulation ageing rule, it reserves sufficient margin for long-term medium-heavy load and occasional overload operation. Equipped with intelligent temperature monitoring and automatic heat dissipation system, it slows down insulation degradation effectively. With routine oil maintenance and regular inspection, the actual service life can reach 32 years, fully meeting the long-cycle operation requirements of commercial and medium industrial projects.
Q11: What are your core advantages for 1500kVA pad-mounted transformers?
A11: We have mature mass production and export experience in 1500kVA medium-large capacity pad-mounted transformers, focusing on segmented commercial and medium industrial scenarios. Different from universal models, our 1500kVA products adopt targeted load optimization design, avoiding the low-efficiency partial-load operation problem of oversized 2000kVA transformers and solving the insufficient load redundancy of 1000kVA models. Featuring moderate loss, high cost performance and strong scenario adaptability, our products are widely applied in global commercial complexes, medium industrial parks and medium-scale new energy projects, supporting factory audits and third-party inspections.

3. Customization, Dimension & Installation

Q12: What non-standard customization can be provided for the 1500kVA transformer?
A12: We support comprehensive scenario-based non-standard customization. Customizable items include multi-national voltage standard matching, dead-front/live-front structural switching, loop/radial feed mode adjustment, urban landscape color spraying, anti-theft and anti-vandal cabinet upgrade, extreme low-temperature (-35℃) and high-temperature (+50℃) adaptation, IP protection grade enhancement and customized foundation size. Key accessories such as load break switches and temperature control devices can be equipped with designated international brands. All customized schemes are confirmed via formal technical agreements to match on-site construction and grid access standards.
Q13: Can you provide accurate dimension and weight data? Is the equipment convenient for transportation and installation?
A13: We provide complete professional technical data including overall dimension drawings, civil foundation embedding drawings, installation spacing parameters and net/gross weight data with formal quotation. The 1500kVA model features compact integrated structure with no over-limit size, supporting integral one-time hoisting and pad installation. It adapts to all conventional cross-border transportation modes without complex heavy cargo assessment, greatly saving on-site construction and logistics costs compared with 2000kVA+ oversized equipment.
Q14: What export packaging methods are adopted for the 1500kVA transformer?
A14: We adopt graded professional export packaging according to transportation distance. Short-distance land transportation adopts full oil-sealed integrated packaging for direct placement and rapid commissioning. For long-distance ocean transportation, we adopt oil-drained nitrogen-filled anti-oxidation protection plus shockproof IPPC fumigated wooden box packaging, equipped with high-precision impact recorders to monitor transportation status, effectively protecting internal windings and insulation systems from moisture and collision damage.

4. Production & FAT Acceptance

Q15: What is the production cycle of the 1500kVA pad-mounted transformer?
A15: The production cycle of standard 1500kVA models is 20–30 working days. For customized environment-adaptive and special-structure models, the cycle is 30–40 working days. We formulate clear delivery schedules in contracts, arrange exclusive project progress tracking, and prioritize production for commercial and industrial key projects to ensure on-time delivery and meet project construction deadlines.
Q16: Is third-party witnessed FAT inspection supported?
A16: We fully support on-site FAT witnessing by customers and authoritative third-party institutions such as SGS, BV and TUV. We coordinate production and test schedules in advance, provide complete raw material qualification certificates, production process records and full test data, ensuring transparent, standardized and traceable acceptance process to meet EPC and grid project acceptance requirements.
Q17: Are core components traceable? Are key processes outsourced?
A17: All core components including silicon steel core, winding, insulating oil, load switch and high-voltage bushing have complete batch traceability records and qualification certificates. Key processes such as winding forming, vacuum oil immersion, sealed assembly and full-load testing are independently completed in-house without outsourcing, ensuring stable and consistent product quality.

5. Quotation, Payment & Customs Clearance

Q18: How long is the quotation valid? Will prices fluctuate with raw materials?
A18: The standard fixed-price quotation is valid for 15 days. For batch commercial and industrial project orders and long-term cooperative customers, the quotation validity can be extended to 150 days. Expired quotations will be updated according to the latest copper and steel raw material prices to ensure fair and transparent pricing.
Q19: What payment terms are supported? Is L/C acceptable for engineering projects?
A19: We support flexible international payment terms including TT telegraphic transfer and irrevocable sight L/C, adapting to the procurement habits of overseas EPC companies and industrial purchasers. Advance payment ratio and installment terms can be flexibly negotiated according to order quantity and project scale, with all terms clearly stipulated in formal export contracts.
Q20: Can you provide preferential certificates of origin for tariff exemption?
A20: We can provide complete customs clearance documents such as CO certificate of origin, FORM E and FORM A, helping customers apply for destination country tariff reduction and exemption, reduce project procurement costs and ensure efficient cross-border customs clearance.

6. Packaging, Logistics & Insurance

Q21: Does the export packaging meet international sea freight standards?
A21: All export packaging adopts international industrial-grade anti-rust, moisture-proof, shockproof and weather-resistant integrated protection, equipped with standard IPPC fumigation marks, fully complying with international quarantine and sea freight regulations. The sealed packaging structure effectively resists high humidity and salt spray during long-distance ocean transportation to avoid equipment corrosion and damage.
Q22: What logistics solutions are available for the 1500kVA transformer?
A22: Benefiting from moderate size and weight without over-limit issues, the 1500kVA transformer supports diversified efficient logistics schemes: sea freight for global bulk delivery, China-Europe railway for Eurasian inland projects, and truck transportation for neighboring cross-border regions. It features low logistics cost and short transportation cycle, improving project delivery efficiency significantly.
Q23: What is the transportation cargo damage claim process?
A23: All exported equipment is fully insured with transportation insurance. Within 48 hours after goods arrival, customers can collect on-site photos, videos and waybill evidence to submit claim applications. We provide full set of contract and test documents to assist rapid claim settlement, subject to official insurance policies and third-party assessment results.

7. SAT & Commissioning Service

Q24: Do you provide overseas on-site installation guidance and commissioning services?
A24: We provide global one-stop professional technical services including on-site foundation acceptance, equipment hoisting positioning, high/low voltage wiring guidance, full-load debugging, harmonic detection and SAT project acceptance, with independent engineering service quotation. 24/7 free remote technical support is always available to quickly solve on-site installation and operational faults, ensuring rapid grid connection and stable power transmission of commercial and industrial projects.

8. Warranty & After-sales Service

Q25: What is the warranty period and coverage scope?
A25: The standard warranty period is 2 years. For batch commercial industrial projects and medium-scale new energy projects, the warranty period can be extended to 3–4 years. The warranty covers all factory manufacturing defects and original accessory quality faults. Failures caused by improper on-site operation, artificial damage, overload beyond design standard and unauthorized modification are excluded from the warranty scope.
Q26: Can you supply original spare parts after warranty expiration?
A26: We provide lifelong supply of original genuine spare parts for all sold 1500kVA transformers, including sealing components, load switch parts and protection devices, ensuring long-term stable operation of customer equipment and solving later maintenance matching problems.
Q27: What is the technical support response speed?
A27: We provide 24/7 all-weather online technical support, responding to conventional consultation and fault troubleshooting within 30 minutes. On-site maintenance services can be arranged within 6–10 working days worldwide. For sudden power supply faults of key commercial and industrial projects, we activate emergency response mechanisms to minimize outage losses.
Q28: What is your factory quality control system for 1500kVA transformers?
A28: We implement full-process ISO quality management system, focusing on medium-heavy load stability, partial-load efficiency and outdoor sealing reliability for 1500kVA medium-large capacity transformers. Each unit passes full-item tests including full-load aging test, insulation test, loss test and sealing test before delivery. Third-party factory audits and quality inspections by SGS, BV and other institutions are fully supported to meet global commercial and industrial power distribution standards.

 

Product parameters

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Capacity: 1500KVA Pad Mounted Transformer
Rated voltage: 10kV, 11kV, 13.8kV, 20kV, 33kV, 34.5kV,35kV;
Maximum operating voltage：38.5kV

Pad Mounted Transformer Technical Specification
RatedPower(KVA)	H.V(KV)	L.V（V）	Loss(W)		Dimension（CM）			Weight(KG)
			No-loadLoss (W)	On-loadLoss (W)	W	D	H	Oil   Weight	Total  Weight
75KVA	34.5KV 19.92KV 13.8KV 13.2KV 7.62KV 12.47KV 7.2KV	240V480V4 80Y/277V 600Y/347V	180	1250	1390	910	1430	120	645
112.5KVA			200	1500	1420	920	1430	138	729
150KVA			280	2200	1510	980	1530	201	989
225KVA			400	3050	1600	1000	1660	230	1195
300KVA			480	3650	1660	1080	1680	260	1415
500KVA			680	5100	1810	1160	1790	325	1905
750KVA			980	7500	2030	1300	2030	535	2755
1000KVA			1150	10300	1651	1549	1854	650	3235
1500KVA			1640	14500	2210	1470	2150	748	5835
2000KVA			2160	20645	2380	1600	2220	950	6430
2500KVA			2680	27786	2480	1650	2330	1020	8865

STANDARD COMPONENTS
Connections and neutral configurations
•     Delta - Wye: Low voltage neutral shall be a fully insulated X0 bushing with removable ground strap.
•     Grounded Wye-Wye: High voltage neutral shall be internally tied to the low voltage neutral and brought out as the H0X0 bushing in the secondary compartment with a removable ground strap.
•     Delta-Delta: Transformer shall be provided without a neutral bushing.
•     Wye-Wye: High voltage neutral shall be brought out as the H0 bushing in the primary compartment and the low voltage neutral shall be brought as the X0- bushing in the secondary compartment.
•     Wye-Delta: High voltage neutral shall be brought out as the H0 bushing in the primary compartment. No ground strap shall be provided (line to line rated fusing is required).
High and low voltage bushings
•     200 A bushing wells (15, 25, and 35 kV)
•     200 A, 35 kV Large Interface
•     600 A (15, 25, and 35 kV) Integral bushings (dead-front)
Electrical-grade wet-process porcelain bushings(live-front)

Tank/cabinet features
•    Bolted cover for tank access (45-2500 kVA)
•    Welded cover with hand hole (>2500 kVA)
•    Three-point latching door for security
•    Removable sill for easy installation
•    Lifting lugs (4)
•    Stainless steel cabinet hinges and mounting studs
•    Steel divider between HV and LV compartment
•    20" Deep cabinet (45-1000 kVA)
•    24" Deep cabinet (1500-7500 kVA)
•    30" Deep cabinet (34.5/19.92 kV)
•    Pentahead captive bolt
•    Stainless steel 1-hole ground pads (45-500 kVA)
•    Stainless steel 2-hole ground pads (750-10,000 kVA)
•    Parking Stands (dead-front)
Valves/plugs
•    One-inch upper filling plug
•    One-inch drain plug (45-500 kVA)
•    One-inch combination drain valve with sampling device in low voltage compartment (750-10,000 kVA)
•    Automatic pressure relief valve
Nameplate
•    Laser-scribed anodized aluminum nameplate

Ordering instructions

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When ordering, the customer should provide the following information:
• Main loop scheme diagram and secondary loop system diagram.
• Electrical schematic diagram of auxiliary circuit and wiring terminal layout
• Equipment layout drawing, combination drawing, floor plan drawing.
• Brand, model, specification and quantity of main electrical components of the equipment.
• Incoming and outgoing lines and cable specifications.
• Equipment surface color (RAL chromatography).
• Other special requirements can be negotiated with Hengfengshuai Electric