CertificationsIEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Huajidian's 11kV 1000 kVA dry type transformer is specifically designed for 11kV medium-voltage power systems and is widely used in high-safety scenarios such as small and medium-sized industrial and commercial projects, data centers, hospitals, and schools. Manufactured in China, the transformer features open windings without encapsulation, air self-cooling, and an oil-free flame-retardant structure, resulting in energy-efficient, low-noise, maintenance-free, and highly safe equipment. As a professional manufacturer and supplier, we leverage our complete production lines, stringent IEC standard testing, and customized services to provide reliable power distribution solutions for projects both domestically and internationally.
The 11kV 1000 kVA dry type transformer is a core power distribution device in 11kV medium-voltage systems. Unlike
traditional oil-immersed transformers, it completely eliminates the risks of fire and leakage. The company possesses a
complete production line encompassing winding fabrication, vacuum impregnation, and core processing, achieving
integrated production from raw materials to finished products, ensuring consistent and stable quality. Each unit
undergoes multiple tests before leaving the factory, including insulation withstand voltage, partial discharge,
temperature rise, and short-circuit impulse testing, fully complying with IEC international power standards.
Core Advantages
1. Excellent Insulation Performance and Stable Operation
The windings utilize high-strength insulation materials combined with vacuum impregnation technology, resulting in
high insulation strength and low partial discharge, meeting the requirements for 11kV voltage level operation and
eliminating insulation breakdown issues. The winding structure has excellent moisture and dust resistance; even in
humid and dusty indoor environments, insulation performance will not degrade due to condensation or dust accumulation.
2. High Capacity and Low Loss, Energy Saving and Noise Reduction
The core uses high-permeability oriented cold-rolled silicon steel sheets, combined with a stepped core and fully
oblique joint technology. Both no-load and load losses are superior to industry standards, effectively reducing
electricity costs in the long term. The core is rigidly bound, resulting in low operating noise and vibration,
minimizing interference with surrounding office and production environments.
3. Diverse Heat Dissipation Solutions and Intelligent Safety Protection
Standard configuration includes an air self-cooling mode, relying on natural convection for heat dissipation; the
structure is simple and consumes no additional energy. A crossflow fan can be added to upgrade to a forced air cooling
mode, rapidly increasing load capacity to cope with sudden high-load conditions. The equipment features a built-in
temperature controller that monitors winding temperature in real time. It automatically alarms when the temperature
exceeds the limit, starts and stops the fan, and triggers trip protection in case of abnormal temperature, ensuring
safe operation.
4. Oil-free and flame-retardant, suitable for multiple installation scenarios
The 11kV 1000 kVA dry type transformer features an oil-free design, high fire safety rating, and can be directly
installed in building power distribution rooms without the need for separate outdoor site planning.
Company Strength and Services
1. Customized R&D
A professional R&D team can provide customized solutions based on the voltage, frequency, and regulatory
requirements of different countries and regions, having served numerous large-scale projects both domestically and
internationally.
2. Delivery Capability
Possesses large-scale production capacity for 11kV series dry type transformers, capable of handling large-volume
orders while quickly responding to small-batch customization needs, with a robust supply chain ensuring on-time
delivery.
3. Full-process Service
The foreign trade and technical teams provide one-stop service including selection, installation guidance, and
after-sales maintenance, assisting customers in completing product certification and parameter integration, reducing
project implementation risks.
Real-world Application Cases
1. General Hospital Project
Eight transformers of this model were installed in the power distribution room of a top-tier hospital in East China.
Thanks to their fire-resistant, low-noise, and maintenance-free characteristics, they have operated stably for three
consecutive years, significantly reducing maintenance workload.
2. Small and Medium-Sized Data Centers
Regional data centers selected this equipment as their core power distribution device. Reliable insulation performance
and an intelligent temperature control system ensure uninterrupted power supply to servers 24/7.
3. Light Industrial Manufacturing Plants
Several light industrial factories have adopted this product after completing 11kV power grid upgrades. The equipment
has shown significant energy-saving and consumption-reducing effects, and its dustproof and moisture-proof design is
perfectly suited to the production workshop environment.
Frequently Asked Questions
Q1: Can this 11kV 1000 kVA dry type transformer be used long-term in humid and dusty indoor environments?
A1: Yes. The windings undergo special insulation and impregnation treatment, providing excellent moisture and dust
resistance. Condensation and dust accumulation will not affect the insulation effect, allowing for long-term stable
operation.
Q2: What are the product's heat dissipation methods, and what operating conditions are they suitable for?
A2: Standard configuration includes air self-cooling, suitable for normal stable loads; optional fan-cooled system
converts it to forced air cooling, capable of handling short-term high-load scenarios and improving the equipment's
load-bearing capacity.
Q3: Does the 11kV 1000 kVA dry type transformer meet international standards, and is its factory testing complete?
A3: Product manufacturing and testing comply with IEC international power standards. Each unit undergoes rigorous
testing before leaving the factory, including insulation, partial discharge, temperature rise, and short-circuit
impulse tests, ensuring quality.
● Installation height: altitude shall not exceed 1000m;
● Waveform of source voltage is approximate to sine wave;
● Symmetry of multi-phase source voltage:
connected voltage of multi-phase transformer should be symmetrical approximately.
● Ambient temperature:
Max temperature +40℃
Max daily mean air temperature: +30℃
Max annual mean air temperature: +20℃
Min air temperature: -30℃ (applicable for indoor transformers)
Rated capacity
Voltage combination
Connection groupl
Loss (KW)
No-load current
Short-circuit impedance
Weight (kg)
(kVA)
HV (kV)
High-voltage tapping range
LV (kV)
symbo
No-load
On-load
(%)
(%)
Body weight
Weight with shell
315
6
6.3
6.6
10
10.5
10
±4×2.5%
0.4
Yyn0
Dyn11
1.025
5.40
0.9
4.0
1280
1340
400
1.21
6.35
0.8
1420
1480
500
1.41
7.60
0.8
1620
1680
630
1.61
8.85
0.7
6.0
1910
1980
630
1.61
8.85
0.7
1890
1965
800
1.97
11.00
0.6
2210
2285
1000
2.30
12.75
0.6
2650
2740
1250
2.78
15.00
0.5
3190
3320
1600
3.20
17.00
0.5
3800
3940
2000
3.90
20.30
0.4
4330
4480
2500
4.70
23.60
0.4
5330
5480
Order guide
Please specify the product model, rated capacity, HV/LV rated voltage and high-voltage tapping range, phase number,
frequency, connection group symbol and so on in the order.
Hot Tags: 11kV 1000 kVA Dry Type Transformer Manufacturer, 11kV Dry Type Transformer Supplier, 1000kVA Transformer Wholesale
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