Home Products Dry Type Transformer 1000 kVA Cast Resin Dry-Type Transformer | China Manufacturer – Zhongxin General

1000 kVA Cast Resin Dry-Type Transformer | China Manufacturer – Zhongxin General

Zhongxin General is a China-based manufacturer, factory and supplier of 1000 kVA three-phase cast resin dry-type transformers — stepping 10 kV down to 400 V with Dyn11 vector group and ANAF cooling. Compliant with GB 20052-2024 (Grade 1 and Grade 2), GB/T 10228-2023 and IEC 60076-11, and meeting EU Commission Regulation No. 548/2014 and 2019/1783 (amended) Tier 1 and Tier 2 energy efficiency requirements. Available in copper or aluminium winding, at 50 Hz or 60 Hz, for domestic and international distribution and industrial projects.

Technical Specifications

Parameter	Value
Rated Capacity	1000 kVA
Phases	3-Phase
Frequency	50 Hz / 60 Hz
High Voltage	10 kV (customizable)
Low Voltage	400 V (customizable)
Vector Group	Dyn11
Insulation Class	Class H (180 °C)
Temperature Rise Limit	125 K
Cooling Method	ANAF (Air Natural + Air Forced)
Installation	Indoor
Energy Efficiency	GB 20052-2024 Grade 1 / Grade 2 · EU No. 548/2014 & 2019/1783 Tier 1 / Tier 2
Applicable Standards	GB/T 10228-2023 · GB 1094.1.2-2013 · GB 1094.3-2017 · GB 20052-2024 · IEC 60076-11
Winding Material	Copper (standard) / Aluminium (available on request)
Protection Degree	IP00 / IP20 / IP30 (enclosure options)

Nameplate data for actual delivered units is provided below. Specific short-circuit impedance, rated currents, and weight will be confirmed on the order datasheet.

Manufacturing Process — From Winding to Dispatch

The quality of a cast resin dry-type transformer is determined in manufacturing — particularly at the LV foil winding, epoxy vacuum casting, and curing stages. The following images document actual production steps at Zhongxin General’s Sichuan facility for the 1000 kVA unit.

Low-Voltage Foil Winding

Foil winding machine winding low-voltage coil of 1000 kVA cast resin dry-type transformer — Zhongxin General factory — The foil winding machine winds the low-voltage coil of the 1000 kVA dry-type transformer. Precision-controlled winding ensures consistent layer thickness and accurate ampere-turn balance across all three phases.

The low-voltage winding adopts a foil winding structure, solving the axial helical angle problem inherent in conventional wire winding and achieving better ampere-turn balance. High-quality copper foil is wound by automatic foil winding machine. The LV output copper busbars are connected to the foil winding using argon-protected welding, ensuring minimal contact resistance. DMD epoxy resin pre-impregnated cloth is used between winding layers for interlayer insulation and bonding.

Epoxy Vacuum Casting and Curing

Multiple 1000 kVA dry-type transformer LV windings after epoxy casting awaiting entry into hot-air curing oven — Zhongxin General factory — Several sets of LV windings, freshly wound and prepared for moulding, staged for entry into the hot-air curing oven for integral cure forming. The vacuum casting process eliminates partial discharge and ensures uniform dielectric strength throughout the winding.

The high-voltage winding is vacuum-cast with filled epoxy resin. This process removes air from the winding structure before resin injection, virtually eliminating partial discharge and ensuring uniform dielectric strength throughout the coil. Glass fiber mesh plates reinforce the inner and outer walls of the HV winding, enhancing mechanical strength and short-circuit withstand capability. After casting, all coils enter a controlled hot-air curing oven where integral forming takes place.

HV Winding After Demoulding

1000 kVA dry-type transformer HV epoxy cast winding after demoulding entering grinding room for surface finishing — Zhongxin General factory — The high-voltage epoxy cast winding coil has completed curing and demoulding, and is now entering the grinding room for removal of surface flash and burrs. The void-free resin encapsulation confirms successful

High-voltage epoxy cast winding coils of 1000 kVA dry-type transformer displayed after demoulding — glass fiber reinforced encapsulation Zhongxin General — Demoulded high-voltage epoxy cast winding coils of the 1000 kVA dry-type transformer. The void-free resin surface and glass fiber reinforcement of the inner and outer winding walls confirm the quality of the vacuum casting process and provide exceptional short-circuit withstand capability.

Following curing, HV epoxy cast windings are demoulded and surface-finished. The clean, void-free resin encapsulation gives SCB-series cast resin transformers their core operating characteristics: flame-retardant, fire-proof, maintenance-free, pollution-free, and capable of operating reliably in humid or contaminated environments.

Core and Coil Assembly

A row of 1000 kVA cast resin dry-type transformers undergoing final assembly at Zhongxin General Sichuan factory — A row of 1000 kVA cast resin dry-type transformers in simultaneous final assembly at Zhongxin General’s Sichuan production facility. Core-and-coil integration, structural clamping, and terminal fitting are all performed at this stage.

Technician installing LV copper busbars on 1000 kVA dry-type transformer low-voltage windings — Zhongxin General factory — A technician installs the low-voltage copper output busbars on a row of 1000 kVA dry-type transformer windings. Correct busbar connection and torque are critical for reliable delivery of the rated LV current.

The iron core uses imported high-quality cold-rolled grain-oriented silicon steel sheets with a five-stage full-oblique joint structure, bound with F-class non-woven tape and surface-coated with epoxy resin to reduce no-load loss, no-load current, and core noise. The HV-to-LV air gap spacing is set to the designed insulation clearance and creepage distances required for reliable 10 kV class operation.

Completed Unit

1000 kVA cast resin dry-type transformer complete unit high-voltage terminal end — SCB14 10kV Dyn11 ANAF Zhongxin General — Completed 1000 kVA SCB14 cast resin dry-type transformer, high-voltage terminal end view. HV output busbars, off-circuit tap connections (±2×2.5%), and glass-fiber-reinforced epoxy encapsulation are clearly visible.

1000 kVA cast resin dry-type transformer complete unit low-voltage terminal end — LV copper busbar output connections Zhongxin General — *Completed 1000 kVA SCB14 cast resin dry-type transformer, low-voltage terminal end view. LV copper output busbars, axial cooling air ducts, and the foil winding coil structure are all clearly visible.*

The high-voltage terminal end features off-circuit tap connections providing ±2×2.5% voltage adjustment capability (five positions: 10,500 V / 10,250 V / 10,000 V / 9,750 V / 9,500 V), allowing the transformer to match local grid voltage variations.

Temperature Control System

PT100 platinum resistance sensors are embedded in the low-voltage coil during manufacturing. These sensors feed into an intelligent temperature controller providing:

Sequential detection and display of three-phase winding temperatures with fault self-diagnosis
Hot-spot phase winding temperature display
Over-temperature alarm output (adjustable setpoint)
Over-temperature trip output (adjustable setpoint)
Automatic or timed fan start/stop (Black Box function)

Optional functions include analog current output, RS485 serial interface for centralized monitoring and SCADA integration, additional iron core or ambient temperature detection points, and additional active output contacts.

Cooling fans are cross-flow top-blowing type, featuring low noise, high wind pressure, and compact aesthetics. Under ANAF forced-air cooling conditions, the transformer can handle continuous overload with superior thermal safety margin.

Applicable Standards and Testing

Multiple 1000 kVA cast resin dry-type transformers undergoing factory acceptance testing — routine tests Zhongxin General — Several 1000 kVA SCB14 cast resin dry-type transformers undergoing simultaneous routine factory acceptance testing. Tests include winding resistance, voltage ratio and vector group, no-load loss and current, load loss and short-circuit impedance, induced overvoltage withstand, and partial discharge measurement.

Every 1000 kVA dry-type transformer manufactured by Zhongxin General undergoes a full programme of routine tests before leaving the factory. No unit is dispatched without a complete test report.

Routine tests (every unit): winding resistance measurement, voltage ratio and vector group verification, no-load loss and no-load current, load loss and short-circuit impedance, induced overvoltage withstand test, separate-source AC withstand test, partial discharge measurement.

Type tests (conducted on representative units; reports available on request): temperature rise test, lightning impulse test.

Special tests (available on request): sound level measurement, short-circuit withstand test.

All tests are conducted in accordance with IEC 60076-11 and GB/T 10228-2023. Test reports and ITP (Inspection and Test Plan) documentation can be provided prior to or alongside shipment. Factory Acceptance Test with client witness is supported.

For a detailed account of how Zhongxin General navigated EU standards compliance — including ITP, FAT witness, CE Declaration of Conformity, and bolt torque documentation — on a real dry-type transformer export project, see how we navigated EU standards compliance on a real 1250 kVA export project.

Available Options and Configurations

Parameter	Standard / Base Option	Other Available Options
Winding material	Copper	Aluminium
HV side voltage	6 kV, 10 kV	Customizable to match local grid standards
LV side voltage	380 V, 400 V, 415 V, 433 V	Customizable to other values per local grid
Frequency	50 Hz	60 Hz
Energy efficiency grade	GB 20052-2024 Grade 1, 2, or 3	—
Tap changer	±2×2.5% (off-circuit)	OLTC on-load tap changer available
Protection degree	IP00 (open type)	IP20, IP30 (with metal enclosure)
Enclosure material	—	Cold-rolled steel plate or stainless steel
Temperature control	Standard intelligent controller	RS485 / Modbus communication (optional)
Cooling method	ANAF (natural + forced-air)	ANAN (natural cooling only)
High-altitude version	Not applicable	For installations above 1,000 m a.s.l.
Special environment version	Not applicable	Tropical, high-humidity, coastal salt-spray

Application: Integration into Prefabricated Substations

The 1000 kVA rating sits at one of the most widely deployed capacities for urban commercial distribution, industrial parks, and new energy project collection points. Its compact footprint and oil-free, flame-retardant construction make it the standard choice for integration into prefabricated box-type substations where fire safety regulations, environmental compliance, and fast deployment are all mandatory.

For a real-world example of dry-type transformers deployed inside prefabricated substations, see our Modular Smart Substation for Yichuan LNG Energy Project — Yan’an, Shaanxi, where Zhongxin General delivered four complete prefabricated smart substation modules ahead of the contractual deadline.

For substations requiring oil-immersed main transformers at higher power ratings, see our prefabricated box substations delivered to PetroChina’s Luntai project in Xinjiang, designed for extreme-environment oilfield operation.

Batch Production Capability

1000 kVA cast resin dry-type transformer being lifted by crane for packaging preparation — Zhongxin General Sichuan factory dispatch — A completed 1000 kVA SCB14 cast resin dry-type transformer being lifted by overhead crane in preparation for packaging. Each unit passes final inspection and complete test documentation before leaving the factory.

Two 1000 kVA all-copper cast resin dry-type transformers loaded on truck for domestic delivery — Zhongxin General Sichuan factory — Two 1000 kVA all-copper-winding cast resin dry-type transformers secured on a truck at Zhongxin General’s Sichuan factory, ready for dispatch to a domestic client. The image demonstrates Zhongxin General’s routine batch production and delivery capability for this capacity range.

Zhongxin General’s Sichuan production lines support batch production of dry-type transformers across the complete 30 kVA to 8,000 kVA capacity range, supporting 6 kV, 10 kV, and 35 kV voltage classes. The 1000 kVA capacity sits in our most active production range alongside the 630–1250 kVA segment, with mature tooling, established quality protocols, and available capacity for volume orders.For a reference on large-scale power infrastructure that included multiple dry-type transformers across this capacity range, see Zhongxin General’s 16,730 kVA intelligent power system delivered for Xinjin District People’s Hospital, which featured 12 transformers from 500 kVA to 2,000 kVA in a single project.

Typical Applications

The 1000 kVA cast resin dry-type transformer is one of the most widely deployed medium-capacity distribution transformers across commercial and industrial sectors. Its flame-retardant, oil-free, maintenance-free characteristics make it the preferred choice for indoor and urban installations where fire safety and environmental compliance are mandatory.

Typical installations include commercial buildings and retail facilities (shopping centres, high-rise office and residential towers, hotels, airports), industrial parks and manufacturing facilities, chemical plants and process industry, new energy projects (solar PV step-up stations, wind farm collection systems), data centres and IT facilities where zero-oil-spill risk is a requirement, rail transit power distribution, and healthcare facilities. Its EU-compliant Grade 1 efficiency option also makes it a regular choice for European import projects.

For a detailed case study of dry-type transformer export to a European buyer — covering IEC 60076-11 compliance, FAT witness, CE Declaration of Conformity, and two-crate export packaging — see When International Standards Come Knocking: exporting 1,250 kVA dry-type transformers to Europe.

Inquire About 1000 kVA Dry-Type Transformer

Need a quotation, technical datasheet, or Factory Acceptance Test arrangement for a 1000 kVA cast resin dry-type transformer? Whether you are sourcing for a single installation, a batch order, or an international export project requiring IEC or EU compliance, Zhongxin General’s engineering team can provide specifications, pricing, compliance documentation, and delivery timelines matched to your requirements.

Tell us your grid voltage, required LV output, frequency, efficiency grade, winding material preference, and any special environmental or installation conditions — and we will configure the right unit for your project.[Contact Us for Price & Datasheet]

About Zhongxin General — Dry-Type Transformer Manufacturer and Factory

Zhongxin General (Sichuan Zhongxin General Electric Energy Co., Ltd.) is a China-based manufacturer and factory specialising in oil-immersed power transformers and dry-type power transformers, HV/MV/LV switchgear, prefabricated substations, energy storage systems, and EV charging infrastructure.

Headquartered in Xinjin District, Chengdu, Sichuan Province, the company holds National “Little Giant” Enterprise status — China’s highest SME innovation designation — alongside National High-Tech Enterprise certification.

Our dry-type transformer portfolio covers 30 kVA to 8,000 kVA, configurable to 6 kV, 10 kV, and 35 kV voltage classes, in copper or aluminium winding, to GB, IEC 60076-11, and EU standards for domestic and international projects. The 1000 kVA cast resin dry-type transformer described on this page sits between our actively produced 630 kVA units and 1,250 kVA units — using the same manufacturing process, the same material standards, and the same testing protocol across the full range.

Every transformer we manufacture undergoes full routine testing to IEC 60076-11 or GB/T 10228-2023 before dispatch. Test reports are issued as standard documentation with every order.

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May 14, 2026 No Comments

Zhongxin General is a China-based manufacturer, factory and supplier of 80 kVA three-phase outdoor oil-immersed distribution transformers — stepping 10 kV down to 400 V with Dyn11 vector group and ONAN cooling. Compliant with GB 1094 (Grade 1/2/3) and IEC 60076, and meeting EU Commission Regulation No. 548/2014 Tier 1 and Tier 2 energy efficiency requirements. Available at 50 Hz or 60 Hz for domestic and international distribution projects.