1000 kVA VPI Dry-Type Transformer
VPI Open-Wound Insulation System
The windings are vacuum-pressure impregnated with electrical insulating varnish to form a mechanically secure, oil-free coil assembly.
Engineered for a 1000 kVA Load
Voltage, frequency, impedance, temperature rise, conductor material and load duty are configured for the approved project requirements.
Serviceable Construction
The accessible open-wound arrangement supports inspection and maintenance appropriate to VPI equipment.
Flexible Enclosure and Cooling
Air-natural cooling is standard; forced-air cooling and project-specific indoor enclosures can be evaluated when required.
Documented Factory Verification
Applicable routine tests are completed before shipment, with test reports and approved drawings available for the project.
Product Advantages
VPI Open-Wound Insulation System
The windings are vacuum-pressure impregnated with electrical insulating varnish to produce a mechanically secure, oil-free coil assembly. This construction is intended for ventilated indoor installations where the project specification calls for a VPI dry-type transformer.
Engineered for a 1000 kVA Load
The electrical design is developed around the required primary and secondary voltage, frequency, impedance, temperature rise, conductor material and load duty instead of applying a generic capacity-range description.
Serviceable Open-Wound Construction
The accessible coil arrangement supports inspection and maintenance practices appropriate to VPI equipment. Final access, clearances and protective barriers depend on the selected enclosure.
Project-Specific Enclosure and Cooling
Air-natural cooling is the normal basis. Forced-air cooling and indoor protective enclosures can be evaluated where the load profile, ventilation study or installation environment requires them.
Documented Factory Verification
Applicable routine tests are completed before shipment. Test documentation and approved drawings can be supplied for project review.
Product Advantages
VPI Open-Wound Insulation System
The windings are vacuum-pressure impregnated with electrical insulating varnish to produce a mechanically secure, oil-free coil assembly. This construction is intended for ventilated indoor installations where the project specification calls for a VPI dry-type transformer.
Engineered for a 1000 kVA Load
The electrical design is developed around the required primary and secondary voltage, frequency, impedance, temperature rise, conductor material and load duty instead of applying a generic capacity-range description.
Serviceable Open-Wound Construction
The accessible coil arrangement supports inspection and maintenance practices appropriate to VPI equipment. Final access, clearances and protective barriers depend on the selected enclosure.
Project-Specific Enclosure and Cooling
Air-natural cooling is the normal basis. Forced-air cooling and indoor protective enclosures can be evaluated where the load profile, ventilation study or installation environment requires them.
Documented Factory Verification
Applicable routine tests are completed before shipment. Test documentation and approved drawings can be supplied for project review.
1000 kVA VPI Dry-Type Transformer
This 1000 kVA VPI dry-type transformer is intended for commercial and industrial distribution systems that require an oil-free, open-wound transformer. During manufacture, the windings are vacuum-pressure impregnated with insulating varnish to improve dielectric integrity, mechanical strength and resistance to normal environmental contamination. The final design is manufactured only after the project data sheet and drawings are approved.
Typical Applications
Typical installations include manufacturing plants, commercial buildings, water-treatment facilities, renewable-energy auxiliary systems and other indoor electrical rooms with controlled ventilation. The transformer room, enclosure, cable entry and protection scheme must be coordinated with local codes and the project engineer.
Typical Project Configuration
Rated capacity: 1000 kVA
Construction: Three-phase VPI open-wound dry type
Primary and secondary voltage: Project specific
Frequency: 50 Hz or 60 Hz
Winding conductor: Copper or aluminum, as specified
Cooling: Air natural; forced air when engineered
Vector group, impedance and taps: Confirmed on the approved data sheet
Enclosure: Indoor ventilated enclosure or project-specified protection
Applicable standards: IEC, IEEE, UL or customer specification, as applicable
VPI or Cast Resin: Which Construction Fits the Project?
VPI and epoxy cast-resin transformers are different constructions. VPI uses varnish-impregnated open windings and is often selected for ventilated indoor electrical rooms, maintainability and project cost objectives. Cast resin encapsulates the windings in epoxy and may be preferred where the approved specification requires greater resistance to moisture or contamination. Jinan Qinghe can manufacture both constructions; the choice should follow the installation environment and governing specification.
Selection and Coordination
Confirm the transformer voltage ratio, vector group, impedance and taps against the single-line diagram. Impedance affects voltage regulation and available secondary fault current, so it must coordinate with downstream switchgear ratings. Also confirm room ventilation, ambient temperature, altitude, sound requirements, cable direction, enclosure dimensions and required working clearances.
Frequently Asked Questions
Is this an epoxy cast-resin transformer?
No. This page is specifically for a VPI open-wound dry-type transformer. For epoxy-encapsulated windings, select the separate 1000 kVA cast-resin product page.
Can the voltage and vector group be customized?
Yes. Primary voltage, secondary voltage, vector group, tap range and frequency are configured to the approved project requirements.
Can a protective enclosure be supplied?
Yes. The enclosure rating, ventilation openings, cable entry and access arrangement are selected for the installation environment and applicable code requirements.
What information is needed for a quotation?
Please provide the single-line diagram, rated capacity, voltage ratio, frequency, vector group, impedance, tap range, conductor preference, temperature rise, enclosure requirement, altitude, ambient temperature, standards, accessories, quantity and delivery destination.
Quotation Information
For an accurate proposal, send the electrical specification and installation conditions together. Our engineering team will review the requested VPI construction, identify any information that requires confirmation and prepare the project data sheet for approval before production.
