1000kVA Single Phase Pad Mounted Transformer
1000kVA Single Phase Pad Mounted Transformer, a high-capacity powerhouse optimized for extensive underground residential and commercial power distribution systems. This advanced oil-immersed transformer boasts ultra-efficient wound cores and premium windings to drastically cut operational losses while maintaining cool, stable performance even at peak demands. Fully aligned with ANSI C57.12.38, IEEE C57.12.00, and DOE efficiency requirements, this 1000kVA padmount delivers seamless step-down from primary voltages up to 34.5kV to versatile secondary outputs, empowering large-scale loop-feed or radial-feed networks with superior overload handling and minimal acoustic footprint.
- Primary Voltage Ratings 34.5-19.92/13.8-7.957/13.2-7.62/12.47-7.2 or others
- Secondary Voltage Ratings 480-240/240-120or customized
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Loop Feed or Radial Feed
- BIL 30/95kV
- Standards IEEE, ANSI, CSA
- Application regional shopping centers, hospitals, and data centers
- Power Rating 500kVA
- Certificate UL/cUL, CSA, CESI
- Cooling Method ONAN, ONAN/ONAF, KNAN, KNAN/KNAF
- Oil Mineral Oil or FR3
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
1000kVA Single Phase Pad Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 1000 kVA |
| Rating Primary Voltage | 11950Delta or Customized |
| Secondary Voltage | 480-240V 240-120V 277V Customized |
| Frequency | 50/60Hz |
| Vector Group | Ii0,Ii6 |
| Winding Material | Aluminum/Copper |
| Efficiency | As IEEE,Doe 2016,CAS Std or Customized |
| Impedance Voltage | Nominal 2% or Customized 1.1-5.75% |
| Altitude | ≤1,000m or Customized |
| Color | ANSI 70 Light gray/Munsell 7GY3.29/1.5 or customized etc |
| Tank material | Mild Steel, 304 Stainless Steel |
| Insulating Oil Weight | 620 kg |
| Total Weight | 3650 kg |
| Outline Dimensions（L×W×H）in. | 1500×1200×1800(mm) |
| Lifting Lug | ELSP Fuse |
| Hinged Door | BAY-O-NET Fuse |
| Parking Bracket | Tap Changer |
| Tank Cover | Oil Level Gauge |
| L.V Bushing (4-Hole ) | Pressure Relief Valve |
| Two/Four Position Load break Switch | Vacuum Pressure Gauge |
| HV Grounding Copper Bar | Terminal Block |
| Temperature Indicator | Door Handle |
| H.V Bushing Well | Ground Strap |
| Grounding Copper Bar | Nameplate |
| 1"'Drain Valve With 3/8" Sampler | Non-PCB decal |
| 1" Upper Fill Valve Filter Press Connection | High Voltage Warning Signs |
Customization Optional
1000kVA Single Phase Pad Mounted Transformer
The 1000kVA Single Phase Pad Mounted Transformer excels in customization, enabling utilities to configure units precisely for challenging large-scale underground installations. Primary voltages range from 2.5kV to 46kV with elevated BIL up to 250kV for enhanced lightning protection, while secondary voltages support 120/240V, 277/480V, 480Y/277V, or specialized configurations to serve extensive loads. Select copper windings for ultimate reliability and heat dissipation or aluminum for weight-optimized transport and installation. High-voltage interfaces include multi-position rotary or linear load-break switches, dry-well canisters for arrester integration, and full-range current-limiting fuses paired with expulsion links for superior fault management. Low-voltage compartments offer expanded terminal blocks accommodating larger cables and future expansions.
Advanced tailoring options feature premium stainless steel tanks with custom powder coatings, high-temperature or biodegradable ester fluids for fire-sensitive zones, and integrated smart monitoring kits with pressure, temperature, and oil-level sensors for predictive maintenance. Additional provisions include fault indicators, visible break windows, grounding balls, and provision for future metering. Impedance values (1.5-7%) can be fine-tuned for system coordination, while seismic and wind-load reinforcements meet regional codes. These comprehensive modifications make the transformer highly discoverable for "tailored high-capacity single-phase pad-mounted transformers" in utility specifications.
Packing and Shipping
1000kVA Single Phase Pad Mounted Transformer
Ensuring pristine delivery of the 1000kVA Single Phase Pad Mounted Transformer requires industrial-grade packaging engineered for heavy equipment and long-haul protection. The transformer is anchored to a robust, pressure-treated timber skid with high-strength steel strapping and corner braces to absorb road vibrations. Sensitive bushings and terminals are individually capped and immobilized with molded foam inserts, while the cabinet exterior receives full-coverage anti-scratch film and reinforced edge guards. A sealed, ventilated wooden crate built to international export standards completely encases the unit, equipped with humidity control packets, multi-directional impact recorders, and lift-point markings for safe handling. This fortified packaging preserves the oil-filled integrity and aesthetic finish against mechanical and climatic stresses.
Global shipping solutions balance cost, speed, and security to meet demanding utility project deadlines for this substantial padmount unit. Sea freight in dedicated 40ft high-cube or open-top containers delivers economical transport worldwide, with custom cradles and shock-absorbing dunnage securing the load for 25-60 day transits. Accelerated air charter options move urgent units in 6-14 days, prioritizing rapid outage recovery. Domestic and cross-border trucking utilizes hydraulic air-ride trailers with oversize permits and pilot car escorts for safe navigation.
Export documentation is comprehensive and pre-prepared, including fumigation certificates, commercial invoices, detailed packing declarations, and fluid transport compliance forms to minimize delays. Sustainability efforts incorporate reusable skid designs and low-emission carrier selection. Clients benefit from an advanced tracking platform providing live positioning, geofence alerts, and dedicated support coordination.
On-site delivery services include optional heavy-lift crane assistance, immediate post-transport inspection, and eco-friendly packaging recycling to accelerate pad foundation placement. Fleet orders leverage container consolidation and scheduled releases for streamlined inventory management. This professional packing and shipping ecosystem guarantees your 1000kVA transformer arrives installation-ready, optimizing searches for "large capacity pad-mounted transformer transportation."
Global shipping solutions balance cost, speed, and security to meet demanding utility project deadlines for this substantial padmount unit. Sea freight in dedicated 40ft high-cube or open-top containers delivers economical transport worldwide, with custom cradles and shock-absorbing dunnage securing the load for 25-60 day transits. Accelerated air charter options move urgent units in 6-14 days, prioritizing rapid outage recovery. Domestic and cross-border trucking utilizes hydraulic air-ride trailers with oversize permits and pilot car escorts for safe navigation.
Export documentation is comprehensive and pre-prepared, including fumigation certificates, commercial invoices, detailed packing declarations, and fluid transport compliance forms to minimize delays. Sustainability efforts incorporate reusable skid designs and low-emission carrier selection. Clients benefit from an advanced tracking platform providing live positioning, geofence alerts, and dedicated support coordination.
On-site delivery services include optional heavy-lift crane assistance, immediate post-transport inspection, and eco-friendly packaging recycling to accelerate pad foundation placement. Fleet orders leverage container consolidation and scheduled releases for streamlined inventory management. This professional packing and shipping ecosystem guarantees your 1000kVA transformer arrives installation-ready, optimizing searches for "large capacity pad-mounted transformer transportation."
32
32 years of industry experience
Manufacturer Test
1000kVA Single Phase Pad Mounted Transformer
Progress Test
Early manufacturing of the 1000kVA single-phase pad-mounted transformer emphasizes core performance verification through detailed magnetic flux mapping and watt-loss analysis on premium steel to ensure ultra-low no-load consumption. Winding production integrates continuous resistance monitoring and high-frequency pulse testing to eliminate turn-to-turn defects and guarantee thermal uniformity. Cabinet assembly undergoes precise geometric tolerance checks via laser profiling and compartment door pressure testing for vandal-resistant integrity. Initial core-coil mounting includes vector group confirmation and reduced-voltage excitation to profile magnetization behavior accurately. Tank fabrication receives advanced non-destructive testing—ultrasonic wall thickness and vacuum decay methods—to validate material strength and weld quality. Bushing integration trials verify sealing torque and electrical clearance compliance. Comprehensive digital logging with component serialization establishes traceability and quality assurance from the outset of production.
Design Tests
All transformers will be tested after finishing the production, test items as follows:
♦ Insulation Power Factor:
♦ Ratio, Polarity, and Phase Relation:
♦ Winding Resistance:
♦ Impulse Tests:
♦ On load Loss Test:
♦ No Load Loss Test
♦ Leak Test:
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Transformer Factory Acceptance Test
NPC Electric will tests made for quality control by the manufacturer on every device or representative samples, or on parts or materials as required, to verify during production that the product meets the design specifications. Sophisticated FAT continuation involves double-frequency induced testing with sensitive partial discharge quantification and RIV measurement, ensuring long-term insulation system health under overvoltage stress. Regulation, impedance, and full-load loss determination employ precision short-circuit techniques for validated efficiency and mechanical endurance data. Operational cycling extensively exercises primary switching apparatus, confirming load-make/load-break ratings and lockout functionality. Fuse coordination and fault interruption simulations verify protective scheme reliability. Extended heat run testing at rated and overload conditions tracks temperature gradients via distributed sensors, maintaining rises within thermal class specifications. Sound pressure level profiling in an acoustically treated area documents compliance for community-sensitive installations. Final holistic inspection scrutinizes cabinet security features, accessory integration, finish quality, and documentation completeness. Full test dossiers—including oscillograms, thermal images, and signed reports—accompany the transformer, certifying its superior readiness for demanding large-scale underground applications.
Routine Test - No Load Loss Test
Purpose of Testing
The purpose of No Load Loss Test is to measure the power loss of the equipment when it is not loaded to evaluate the iron loss and other core losses. This test can help understand the energy efficiency of the equipment and help determine the performance of the transformer or motor when it is running at no load.
Testing Equipment
No Load Loss tester (e.g. OMICRON, Megger, Schneider Electric, etc.)
Voltage source (usually 230V, 400V or customized according to customer requirements to adapt to different equipment)
Power analyzer (used to measure power loss and efficiency)
Ammeter and voltmeter
Temperature and humidity meter
Voltage source (usually 230V, 400V or customized according to customer requirements to adapt to different equipment)
Power analyzer (used to measure power loss and efficiency)
Ammeter and voltmeter
Temperature and humidity meter
Pre-Test Preparation
Disconnect the power supply of the device and ensure that the device is properly grounded and discharged to ensure safe operation.
Please ensure that the test is carried out in a suitable environment with a relative humidity of less than 75% and avoid rainy days or extreme weather (recommended temperature range: 20-30°C).
Please ensure that the test is carried out in a suitable environment with a relative humidity of less than 75% and avoid rainy days or extreme weather (recommended temperature range: 20-30°C).
Test Progress
Connect the Test Instrument:
Connect the test equipment to the high voltage side of the transformer, making sure the wiring is correct and the equipment is grounded.
Apply Test Voltage:
Usually it is 110% of the rated voltage, for example, if the rated voltage of the transformer is 33 KV, apply 36.3 KV (110%).
Connect the test equipment to the high voltage side of the transformer, making sure the wiring is correct and the equipment is grounded.
Apply Test Voltage:
Usually it is 110% of the rated voltage, for example, if the rated voltage of the transformer is 33 KV, apply 36.3 KV (110%).
Measure and Record
Start the test and record the following parameters:
No Load Current
No Load Loss
Power Factor
Current
Voltage
Temperature and Humidity
No Load Current
No Load Loss
Power Factor
Current
Voltage
Temperature and Humidity
Temperature Correction
The power loss of the test results is corrected to a reference temperature (usually 20°C) to ensure an accurate evaluation.
Repeat Testing (if necessary)
Test at different rated voltages, especially when the transformer has multiple capacity levels, and perform no-load loss tests for each capacity level separately.
Evaluation Criteria (Reference)
No-load loss ≤ 0.2% rated power (excellent)
No-load loss < 0.2% ≤ 0.5% rated power (good)
No-load loss > 0.5% rated power (further inspection or corrective action required)
No-load loss < 0.2% ≤ 0.5% rated power (good)
No-load loss > 0.5% rated power (further inspection or corrective action required)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Optimal for high-density urban housing projects and luxury estates, powering extensive underground networks serving numerous premium residences efficiently and discreetly.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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