zishengelectric
Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
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Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
The 1500kVA oil-immersed transformer is a three-phase distribution transformer designed to convert medium-voltage power into stable, usable voltage for industrial facilities, utility networks, renewable energy projects, commercial buildings and infrastructure systems.
The transformer uses high-quality silicon steel cores, copper or aluminum windings, transformer-grade insulating oil and a sealed corrugated tank. It can be customized according to the project voltage, frequency, vector group, impedance, installation environment and applicable IEC or IEEE standards.
| Parameter | Standard Configuration / Available Options |
|---|---|
| Rated Capacity | 1500kVA / 1.5MVA |
| Transformer Type | Oil-immersed distribution transformer |
| Phase | Three phase |
| High Voltage | 6kV, 10kV, 11kV, 13.8kV, 20kV, 22kV, 33kV or customized |
| Low Voltage | 400V, 415V, 440V, 480V, 690V or customized |
| Frequency | 50Hz or 60Hz |
| Cooling Method | ONAN; ONAF available when required |
| Winding Material | Copper or aluminum |
| Vector Group | Dyn11, Dyn5, Yyn0, YNd1 or customized |
| Tap Changer | Off-circuit tap changer or OLTC |
| Typical Tapping Range | ±2 × 2.5%, ±5% or customized |
| Short-Circuit Impedance | Typically 4.5%–6.5%, subject to project requirements |
| Insulation Medium | Mineral insulating oil or natural/synthetic ester fluid |
| Core Material | Cold-rolled grain-oriented silicon steel |
| Temperature Rise | According to IEC/IEEE standard and project conditions |
| Ambient Temperature | Typically −25°C to +40°C; high-temperature design available |
| Installation | Outdoor or indoor |
| Altitude | Up to 1,000m as standard; high-altitude design available |
| Tank Construction | Hermetically sealed corrugated tank or conservator type |
| Protection Level | Customized according to installation conditions |
| Standards | IEC 60076, IEEE C57, ANSI, GB or project-specific standards |
| Service Life | Designed for 25–30 years under proper operating conditions |
| Warranty | According to the agreed technical and commercial contract |
Final parameters are subject to the approved technical specification and transformer drawings.
The 1500kVA transformer can be engineered for different electrical systems, including:
The transformer core is manufactured from high-permeability, cold-rolled grain-oriented silicon steel. Step-lap core construction can be used to reduce no-load loss, magnetizing current, vibration and operating noise.
Copper or aluminum conductors are selected according to the required performance and project budget. The windings are mechanically reinforced to withstand short-circuit forces, voltage fluctuations and continuous industrial loading.
The insulating oil transfers heat from the core and windings to the corrugated tank or radiator surfaces. ONAN cooling provides reliable heat dissipation without external cooling equipment. ONAF cooling can be supplied for special loading requirements.
A hermetically sealed tank prevents direct contact between transformer oil and outside air. This helps reduce moisture ingress, oil oxidation and routine maintenance requirements.
A conservator-type structure can also be supplied when required by the project specification.
The core, windings and insulation system are optimized to provide:
The transformer can be customized for demanding environments such as:
A typical 1500kVA oil-immersed transformer includes:
The following protection, monitoring and connection accessories are available:
Every 1500kVA transformer can be engineered around the actual project conditions.
| Customization Item | Available Options |
|---|---|
| Voltage Ratio | Customized primary and secondary voltage |
| Frequency | 50Hz or 60Hz |
| Conductor | Copper or aluminum |
| Vector Group | According to system configuration |
| Tap Regulation | Off-circuit or on-load tap changer |
| Insulating Fluid | Mineral oil, natural ester or synthetic ester |
| Tank Design | Sealed corrugated tank or conservator type |
| Cooling | ONAN or ONAF |
| Efficiency Level | According to local regulations and tender requirements |
| Paint System | C3, C4 or C5 corrosion protection |
| Enclosure | Open terminals, cable box or protected terminal chamber |
| Noise Level | Standard or low-noise design |
| Altitude | Standard or high-altitude application |
| Ambient Conditions | Tropical, desert, coastal or cold-climate design |
| Monitoring | Local instruments or remote digital monitoring |
| Standards | IEC, IEEE/ANSI, GB or customer-specified standard |
Each transformer is tested before delivery. Routine tests can include:
When required by the customer or project specification, additional tests can be arranged:
The 1500kVA oil-immersed transformer is suitable for:
To prepare an accurate transformer design and quotation, please provide:
The transformer is prepared for international transport with:
Depending on the transformer dimensions and shipping requirements, bushings, radiators and accessories may be removed and packed separately.
Yes. The primary and secondary voltages can be designed according to the local electrical system and project requirements.
Yes. Both copper and aluminum winding designs are available. Copper windings are often selected for projects requiring compact construction and stronger mechanical performance.
Yes. The cooling system, insulation level, temperature rise and tank design can be adjusted for high-temperature environments.
Yes. It can be designed for solar PV, wind power and energy-storage applications, including special voltage ratios, harmonic considerations and bidirectional power flow.
Yes. High-altitude transformers are available. The insulation clearances, cooling performance and rated capacity must be corrected according to the installation altitude.
Yes. The manufacturer can provide routine test reports, drawings, nameplate information, packing lists and other agreed FAT documents before shipment.
Please provide the voltage ratio, frequency, vector group, winding material, impedance, installation environment, required standard, accessories, quantity and destination country.
| Customizable Item | Available Options |
|---|---|
| Rated Capacity | 1500kVA or customized according to load requirements |
| Primary Voltage | 6kV, 10kV, 11kV, 13.8kV, 20kV, 22kV, 33kV, 35kV or customized |
| Secondary Voltage | 400V, 415V, 440V, 480V, 690V or customized |
| Frequency | 50Hz or 60Hz |
| Winding Material | Copper or aluminum |
| Vector Group | Dyn11, Dyn5, Yyn0, YNd1 or project-specific configuration |
| Tap Changer | Off-circuit tap changer or on-load tap changer |
| Tapping Range | ±2 × 2.5%, ±5% or customized |
| Short-Circuit Impedance | Designed according to system and coordination requirements |
| Cooling Method | ONAN or ONAF |
| Insulating Fluid | Mineral oil, natural ester or synthetic ester |
| Tank Structure | Hermetically sealed corrugated tank or conservator type |
| Efficiency Level | Customized to local regulations and project loss requirements |
| Temperature Rise | Standard or reduced temperature-rise design |
| Noise Level | Standard or low-noise configuration |
| Installation | Indoor or outdoor |
| Altitude Design | Standard below 1,000m or customized for high-altitude locations |
| Climate Adaptation | Tropical, desert, coastal, high-humidity or cold-climate design |
| Corrosion Protection | C3, C4 or C5 paint system |
| Terminal Arrangement | Porcelain bushings, plug-in bushings, cable boxes or busbar connections |
| Enclosure | Open terminals, protective terminal covers or enclosed cable chambers |
| Protection Devices | Buchholz relay, pressure-relief device and sudden-pressure relay |
| Monitoring Devices | Oil and winding temperature indicators, oil-level gauge and remote contacts |
| Digital Monitoring | Online temperature, oil-level and operating-status monitoring |
| Accessories | Surge arresters, current transformers, marshalling box, rollers and cooling fans |
| Paint Colour | RAL colour customized to project requirements |
| Applicable Standard | IEC 60076, IEEE C57, ANSI, GB or customer-specified standard |
| Nameplate and Labels | English, bilingual or customer-specified language |
| Documentation | Drawings, test reports, manuals, data sheets and FAT documents |
| Inspection | Customer-witnessed FAT or third-party inspection available |
| Packaging | Container, breakbulk or seaworthy export packaging |
All configurations can be engineered according to the project’s voltage system, installation environment, technical standard and operating conditions.
Each 1500kVA oil-immersed transformer undergoes comprehensive inspections and electrical tests during manufacturing and before shipment. Testing is performed according to IEC 60076, IEEE C57 or the customer’s specified standard.
| Test Item | Inspection Purpose |
|---|---|
| Winding Resistance Test | Verifies conductor continuity and winding consistency |
| Voltage-Ratio Test | Confirms the designed transformation ratio |
| Vector-Group Test | Verifies phase displacement and terminal connections |
| Insulation Resistance Test | Evaluates the condition of the insulation system |
| No-Load Loss Test | Measures core loss at rated voltage |
| No-Load Current Test | Checks core excitation performance |
| Load Loss Test | Measures winding and stray losses |
| Impedance Voltage Test | Confirms short-circuit impedance |
| Applied Voltage Test | Verifies insulation strength to earth and other windings |
| Induced Voltage Test | Checks inter-turn and inter-layer insulation |
| Oil Quality Test | Confirms dielectric strength and oil condition |
| Functional Test | Verifies tap changer, indicators, relays and accessories |
| Leakage Test | Confirms the sealing performance of the tank and fittings |
The following tests can be arranged according to project requirements:
Customer representatives or an authorized third-party inspection company may witness the Factory Acceptance Test before shipment. The approved test report, nameplate details, drawings and inspection records can be included in the final documentation package.
All test procedures and acceptance criteria are confirmed according to the approved technical specification and applicable standard.
The 1500kVA oil-immersed transformer is designed for medium-voltage power distribution in utility, industrial, commercial and renewable energy systems. It provides stable voltage conversion for continuous and demanding electrical loads.
Suitable for urban and rural distribution systems, substations and grid-extension projects, converting medium voltage into low voltage for local power supply.
Provides reliable power for:
Can be customized for:
Special designs are available for harmonic loads, bidirectional power flow and high ambient temperatures.
Suitable for mines, crushing plants, conveyor systems, pumping stations and heavy industrial equipment. Reinforced structures and enhanced cooling can be provided for harsh operating environments.
Applicable to oilfields, refineries, petrochemical plants, pumping stations and auxiliary power systems. Coastal and C5 anti-corrosion designs are available.
Provides power distribution for:
Suitable for municipal power systems, water-treatment plants, railway facilities, ports, construction projects and transportation infrastructure.
The transformer can be engineered to match project-specific voltage ratios, impedance, vector groups, efficiency requirements, environmental conditions and protection systems.
Typical configurations include:
Other voltage combinations are available according to the project’s electrical system.
1500kVA Oil Immersed Transformer