zishengelectric
Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
Search productSearch post
Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
Each 2000kVA oil-immersed transformer undergoes comprehensive inspections and electrical tests throughout manufacturing and before shipment. Testing is performed according to IEC 60076, IEEE C57 or the project’s approved technical specification.
| Test Item | Inspection Purpose |
|---|---|
| Winding Resistance Measurement | Verifies winding continuity, connection quality and phase balance |
| Voltage-Ratio Measurement | Confirms the designed transformation ratio at every tap position |
| Vector-Group Verification | Checks polarity, phase displacement and terminal connections |
| Insulation Resistance Test | Evaluates insulation between HV, LV and earth |
| No-Load Loss Test | Measures magnetic-core losses at rated voltage |
| No-Load Current Test | Checks excitation current and magnetic-core condition |
| Load-Loss Test | Measures winding and stray losses |
| Short-Circuit Impedance Test | Confirms impedance against the approved design value |
| Applied Voltage Test | Verifies insulation strength between windings and earth |
| Induced Overvoltage Test | Checks inter-turn and inter-layer insulation |
| Transformer Oil Test | Confirms oil dielectric strength and condition |
| Tap-Changer Test | Verifies correct operation at every tap position |
| Accessory Functional Test | Checks indicators, relays, contacts and cooling equipment |
| Tank Leakage Test | Confirms sealing of the tank, valves, welds and gaskets |
The following tests can be arranged when required:
Customer representatives or an independent inspection company may witness the Factory Acceptance Test before shipment. The final documentation package can include approved drawings, nameplate details, test reports, calibration records and inspection results.
All testing procedures and acceptance criteria are confirmed according to the applicable standard and approved project specification.
Every 2000kVA oil-immersed transformer undergoes routine testing before shipment. Tests are conducted according to IEC 60076, IEEE C57 or the project’s approved technical specification.
| Routine Test | Purpose |
|---|---|
| Winding Resistance Measurement | Confirms winding continuity, connection quality and resistance balance between phases |
| Voltage-Ratio Measurement | Verifies the designed voltage ratio at every tap position |
| Vector-Group Verification | Confirms polarity, phase sequence and phase displacement |
| Short-Circuit Impedance Measurement | Verifies that the transformer impedance meets the approved design value |
| Load-Loss Measurement | Measures winding and stray losses at the specified reference temperature |
| No-Load Loss Measurement | Determines magnetic-core losses at rated voltage |
| No-Load Current Measurement | Evaluates excitation current and magnetic-core condition |
| Insulation Resistance Test | Checks insulation between HV, LV and earth |
| Applied Voltage Withstand Test | Verifies the main insulation strength between windings and earth |
| Induced Overvoltage Test | Checks inter-turn and inter-layer winding insulation |
| Tap-Changer Functional Test | Confirms correct operation and electrical connections at every tap |
| Transformer Oil Test | Verifies the dielectric strength and condition of the insulating oil |
| Tank Leakage Test | Checks the tank, radiators, valves, welds and gaskets for leakage |
| Accessory Functional Test | Verifies indicators, relays, cooling equipment and alarm contacts |
| Earthing Continuity Test | Confirms reliable transformer grounding connections |
| Visual and Dimensional Inspection | Checks dimensions, terminals, nameplate, paint finish and accessories |
A complete routine test report can be supplied before shipment. Type and special tests—including temperature-rise, lightning-impulse, sound-level and partial-discharge tests—are available when specified by the customer.
The 2000kVA oil-immersed transformer is designed for medium-voltage power distribution in utility, industrial, commercial and renewable energy systems. Its 2MVA capacity makes it suitable for medium-to-large facilities with continuous or heavy electrical loads.
Suitable for:
Provides stable power for:
The transformer can be customized for:
Special designs are available for harmonic loads, bidirectional power flow, voltage fluctuations and high ambient temperatures.
Suitable for mines, crushing plants, conveyor systems, pumping stations and mineral-processing facilities. Reinforced windings, enhanced cooling and heavy-duty corrosion protection can be provided for harsh operating environments.
Applicable to:
C4 or C5 anti-corrosion systems are available for coastal and chemically aggressive environments.
Provides reliable power distribution for:
Suitable for municipal facilities, water-treatment plants, ports, railway systems, transportation hubs and major construction projects.
The transformer can be engineered according to project-specific voltage ratios, vector groups, impedance, efficiency targets, installation environments and protection requirements.
Typical configurations include:
Other voltage combinations are available according to the local grid and project design.
It converts medium-voltage electricity into a lower distribution voltage for utility networks, industrial plants, renewable energy projects, commercial complexes and infrastructure facilities.
Yes. Common configurations include 10kV/0.4kV, 11kV/0.415kV, 13.8kV/0.48kV, 20kV/0.4kV and 33kV/0.415kV. Other voltage ratios can be designed for the project.
For a three-phase 2000kVA transformer, the approximate rated secondary current is:
The final current depends on the approved secondary voltage.
Yes. Copper and aluminum winding designs are available. The selection depends on efficiency requirements, transformer size, operating conditions and project budget.
The standard cooling method is ONAN—Oil Natural Air Natural. ONAF cooling with external fans can be supplied for increased loading or high-temperature operation.
A typical impedance value is approximately 6%, but it can be customized according to fault-current calculations, protection coordination and system requirements.
Yes. It can be supplied with a sealed tank, weather-resistant accessories and a C3, C4 or C5 corrosion-protection system for outdoor installation.
Yes. High-temperature insulation, enhanced cooling, sealed terminal chambers, stainless-steel hardware and C5 anti-corrosion coating are available.
Yes. For sites above 1,000 metres, the insulation clearances, cooling performance and temperature-rise design will be adjusted according to the installation altitude.
Yes. The transformer can be designed for solar PV, wind power and battery energy-storage applications, including bidirectional power flow, harmonic loads and customized voltage ratios.
The transformer can be manufactured according to IEC 60076, IEEE C57, ANSI, GB or another customer-specified standard.
Routine tests include winding resistance, voltage ratio, vector group, no-load loss, load loss, impedance, insulation resistance and dielectric withstand tests. The oil, tank and accessories are also inspected.
Yes. Customer-witnessed Factory Acceptance Testing or independent third-party inspection can be arranged before shipment.
Available accessories include:
Routine maintenance generally includes inspecting the transformer oil, oil level, bushings, gaskets, cable connections, grounding system, cooling equipment and protection devices.
The transformer is secured on a reinforced base with protected bushings, sealed openings and moisture-resistant wrapping. Radiators and vulnerable accessories may be removed and packed separately.
Please provide:
With correct installation, appropriate loading and regular maintenance, the transformer is generally designed for approximately 25–30 years of operation.
2000kVA Oil Immersed Transformer