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10kV Dry Type Transformer SCB10/SCB11/SCB12/SCB13/SCB14/SCB18 Series

Overview

Our 10kV epoxy resin dry-type transformer utilizes vacuum casting technology, delivering oil-free, fire-resistant, and maintenance-free operation with high reliability. It boasts UL/CE certification, superior insulation, moisture and corrosion resistance, and intelligent thermal management—all in compliance with RoHS. Ideal for data centers, hospitals, and commercial complexes, we also offer customized voltage and protection solutions.

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Brief Introduction

Ⅰ.Brief Intrucodtion

1.Customizable: Support voltage level (35kV/10kV, 35kV/0.4kV, etc.), capacity, protection level (IP20-IP65), cooling method (natural air cooling/forced air cooling/water cooling), insulation level (F/H class) customization, adapt to different power grid and environmental requirements.

2.Implementation standards: Global core standards: IEC 60076-11, in line with multinational standards, IEEE, ANSI, NEMA, GB

3.Voltage level: standard 10kV/0.4kV, 6.6kV, 11kV and other voltage specifications can be customized.

4.Phase number: three phases

5.Voltage regulation: standard non-excitation voltage regulation, optional on-load voltage regulation.

6.Rated capacity: 30-2500kVA, can be increased to 3150kVA (enhanced cooling).

7.Frequency: Standard 50Hz three-phase, outlet can do 60Hz.

8.Link group: standard Dyn11, can be specially customized Yyn0.

9.Impedance voltage: standard 6%, adjustable between 4%-8%.

10.Cooling method: standard air cooling, ultra-large capacity can be water cooled.

11.Protection level: standard IP20 (indoor), optional IP54 (dust and water resistance).

12.Insulation Grade: Standard Class F (155°C), Optional Class H (180°C).

13.Tap range: standard ±5% (5 gears), can be expanded to ± 10% (9 gears), power-off operation required.

Ⅱ.working conditions

1.Altitude: ≤1000 meters

2.Ambient temperature: -25°C~+40°C

3.Relative humidity: ≤90% (no condensation)

4.Maximum temperature: +40°C

5.Minimum temperature: -25°C

6.Average daily temperature: +35°C

7.Average annual temperature: +20°C

8.Installation site: indoor ventilation environment

9.Rated Voltage: 10kV (Customizable)

10.Rated frequency: 50Hz/60Hz

11.Connection group: Dyn11

12.Scope of application: commercial centers, data centers, industrial plants, public buildings, rail transit, new energy power generation systems, etc

Note: Beyond the above conditions, it needs to be reduced for use, and special environments (high altitude, high temperature, severe cold, explosion-proof, etc.) can be customized.

Ⅲ.Type of experiment

1.Routine tests: winding resistance measurement, voltage ratio measurement, short-circuit impedance measurement, load loss measurement, no-load loss measurement, power frequency withstand voltage test

2.Type test: temperature rise test, lightning impact test, sound level measurement, short circuit tolerance test

Ⅳ.Component inspection

1.Iron core: magnetic permeability, loss value detection

2.Winding: inter-turn withstand pressure, local volume detection

3.Insulation materials: heat resistance grade, flame retardant test

4.Cooling system: fan performance, protection level verification

V.Types of certifications

1.Safety certification: UL/CE/CQC

2.Energy efficiency certification: GB 20052 energy efficiency level 1

3.Environmental certification: RoHS/REACH

4.Special certifications: Explosion-proof certification (ATEX), classification society certification

Note: All products have passed a full set of routine tests before leaving the factory, and the type test report can be queried.

Structural Features

Ⅰ.Product characteristics:

The 10kV epoxy resin dry-type transformer adopts vacuum casting technology, with epoxy resin and glass fiber composite insulation as the core, and has the following characteristics:

1.Oil-free fire protection: solid insulation structure, no risk of leakage, eliminating fire and environmental pollution hazards.

2.High dielectric strength: Insulation grade up to F (155°C) or H (180°C), moisture and corrosion resistance, can operate in 100% humid environment.

3.Strong fault resistance: high mechanical strength, excellent resistance to short circuit and impulse current, ensuring system stability.

4.Intelligent temperature control: Built-in PT100 sensor, supports over-temperature alarm and tripping, to meet unattended needs.

5.Modular and compact design: reasonable structure, easy installation, support various cooling methods such as natural air cooling (AN) and forced air cooling (AF).

Ⅱ.Product advantages

1.Safety and environmental protection: oil-free design, fire and explosion-proof, can be installed directly in the load center, low combustion toxicity, and RoHS compliant.

2.Maintenance-free operation and maintenance: Fully dry structure, no need for complex maintenance such as oil filtration and oil change, reducing labor and time costs.

3.High efficiency and energy saving: low loss, low partial discharge design, no-load efficiency up to 98%-99%, operating energy consumption is significantly reduced.

4.Wide environmental adaptability: supports -25°C~+40°C wide temperature operation, and can be customized for special environments such as high altitude, high temperature, and severe cold.

5.Silent operation: Excellent noise control (minimum 48dB), suitable for sensitive places such as schools and hospitals.

Ⅲ.Benefits of the product

1.Economy: SCB12 saves 18% of electricity costs (8,000 hours of operation per year) compared to SCB10, and amorphous alloy models reduce CO₂ 2.4 tons (800kVA) per year.

2.Space optimization: The compact design saves 30% of the floor space compared to oil variables, making it suitable for space-constrained scenarios.

3.Long-term reliability: 20-30 years of service life under standard conditions, H-class insulation + strict maintenance can be extended to more than 40 years.

4.Global Compliance: Passed international certifications such as UL, CE, CQC, etc., supporting access to multiple markets such as North America, the European Union, and Southeast Asia.

5.Intelligent support: Reserve IoT interfaces to support remote monitoring and energy efficiency optimization, empowering smart power systems.

Ⅳ.Evidence

1.Energy efficiency certification: No-load loss ≤ 650W (500kVA, SCB14), in line with GB 20052-2020 first-level energy efficiency standard, and passed IEC 60076-20 global energy efficiency specification.

2.Safety verification: Authoritative Type Test Report (TTR) is provided through IEC 60076-5 short-circuit resistance test and IEC 60076-3 insulation strength test.

3.Environmental adaptability is proven: it supports -50°C extreme cold start (GB/T 2423.1) and +60°C high temperature full load operation (GB/T 2423.2), and provides high-altitude (5000m) capacity reduction design cases.

4.Customer revenue case: The data center saves 180,000 yuan in electricity bills and ≤ 50dB in noise after using SCB14; The customized plan of the Antarctic research station has been in trouble-free operation for more than 5 years.

5.Certification system: All products have passed ISO 9001/14001, UL 1561, RoHS, REACH and other certifications to ensure compliance access to the global market.

Product structure

The structure of the 10kV dry-type transformer (epoxy casting type) is based on the epoxy resin insulation system, which is compact and modular as a whole, and is mainly composed of the following key parts:

Ⅰ.Iron core

Using 0.3mm high permeability cold-rolled silicon steel sheet (such as 30Q120), it is laser cut and stacked with a 45-degree full miter seam to form a closed magnetic circuit. The core column is tied with a non-weft glass ribbon, and the yoke is fixed by a pull plate. The surface of the silicon steel sheet is coated with insulating paint, and epoxy insulation gaskets are placed between the core and the base to ensure ground insulation.

Ⅱ.Winding

1.High-voltage winding: using high-purity electrolytic copper wire, covered with F-grade polyimide film, cylindrical or segmented cake winding, DMD insulation paper between layers, epoxy braces between sections to form a cooling airway. The whole is vacuum-cast epoxy resin and cured into an F-class insulating castable.

2.Low voltage winding: small capacity is used for copper wire cylinder winding, large capacity (≥ 800kVA) is used for 0.3-0.5mm copper foil winding, insulation with DMD or Nomex paper between layers, and epoxy end ring cured at the end. It is arranged concentrically with the high-pressure winding, and 8-12mm axial cooling air ducts are reserved.

Ⅲ.Insulation system

It is mainly insulated with epoxy resin castable, with a flexural strength of more than 120MPa, a power frequency withstand voltage of ≥ 35kV, and a lightning impact withstand voltage of ≥75kV. Reliability is ensured by vacuum degassing and partial discharge testing (≤10pC).

 

Ⅳ.Cooling system

1. Natural air cooling (AN): 500kVA and below models, heat dissipation through heat dissipation bar air convection, and the winding temperature rise is controlled within 80K when the ambient temperature ≤ 40°C.

2. Forced air cooling (AF): 800kVA and above models are equipped as standard, equipped with 2-4 axial flow fans, temperature control linkage, heat dissipation efficiency increased by 50%, and short-term overload allowed by 20%

Ⅴ.Auxiliary parts

1. Housing: ≥2mm cold-rolled steel plate welded, IP20 (indoor) or IP54 (outdoor), ventilation louvers on the side, surface anti-corrosion treatment.

2. Temperature control system: 3 PT100 sensors are embedded in the winding, and the intelligent thermostat displays the temperature, over-temperature alarm (130°C), tripping (150°C), and supports RS485 communication.

3. Wiring device: the high-voltage side is a copper terminal with an insulating cover, with a 3-speed non-excitation tap-changer; The low pressure side is a tinned copper bar (TMY-3× [60×6]) with a support side/ejector line.

4. Base frame: section steel welding, rubber anti-shock spacer at the bottom, and the mounting hole conforms to the national standard.

The overall structure is compact, oil-free, low maintenance, excellent insulation and moisture-proof performance, and meets the requirements of safe operation of 10kV power distribution system.

Specification

额定容量 (KVA)
Rated capacity		 高压 (KV)
H.V		 低压 (KV)
L.V		 连接组标号Connection symbol 空载损耗 (KW)
No-load loss		 负载损耗（KW）On-load loss 短路阻抗（%）Short circult impedance
10 11 13 10 11 13
30 6
6.3
6.6
10
10.5
11		 0.4 Dyn11/Yyn0 0.190 0.170 0.135 0.710 0.710 0.640 4.0
50 0.270 0.240 0.195 1.000 1.000 0.900
80 0.370 0.330 0.265 1.380 1.380 1.240
100 0.400 0.360 0.290 1.570 1.570 1.410
125 0.470 0.420 0.340 1.850 1.850 1.660
160 0.540 0.480 0.385 2.130 2.130 1.910
200 0.620 0.550 0.445 2.530 2.530 2.270
250 0.720 0.640 0.515 2.760 2.760 2.480
315 0.880 0.790 0.635 3.470 3.470 3.120
400 0.980 0.880 0.705 3.990 3.990 3.590
500 1.160 1.040 0.835 4.880 4.880 4.390
630 1.340 1.200 0.965 5.880 5.880 5.290
630 1.300 1.170 0.935 5.960 5.960 5.360 6.0
800 1.520 1.360 1.090 6.960 6.960 6.260
1000 1.770 1.590 1.270 8.130 8.130 7.310
1250 2.090 1.880 1.500 9.690 9.690 8.720
1600 2.450 2.200 1.760 11.700 11.700 10.500
2000 3.050 2.740 2.190 14.400 14.400 13.000
2500 3.600 3.240 2.590 17.100 17.100 15.400
额定容量 (KVA)
Rated capacity		 高压 (KV)
H.V		 低压 (KV)
L.V		 连接组标号Connection symbol 空载损耗 (KW)
No-load loss		 负载损耗（KW）On-load loss 短路阻抗（%）Short circult impedance
30 6
6.3
6.6
10
10.5
11		 0.4 Dyn11/Yyn0 0.150 0.130 0.105 0.710 0.640 0.640 4.0
50 0.215 0.185 0.155 1.000 0.900 0.900
80 0.295 0.250 0.210 1.380 1.240 1.240
100 0.320 0.270 0.230 1.570 1.415 1.415
125 0.375 0.320 0.270 1.850 1.665 1.665
160 0.430 0.365 0.310 2.130 1.915 1.915
200 0.495 0.420 0.360 2.530 2.275 2.275
250 0.575 0.490 0.415 2.760 2.485 2.485
315 0.705 0.600 0.510 3.470 3.125 3.125
400 0.785 0.665 0.570 3.990 3.590 3.590
500 0.930 0.790 0.670 4.880 4.390 4.390
630 1.070 0.910 0.775 5.880 5.290 5.290
630 1.040 0.885 0.750 5.960 5.365 5.365 6.0
800 1.215 1.035 0.875 6.960 6.265 6.265
1000 1.415 1.205 1.020 8.130 7.315 7.315
1250 1.670 1.420 1.205 9.690 8.720 8.720
1600 1.960 1.665 1.415 11.730 10.555 10.555
2000 2.440 2.075 1.760 14.450 13.005 13.005
2500 2.880 2.450 2.080 17.170 15.445 15.445

FAQS

10kV Dry Type Transformer SCB10/SCB11/SCB12/SCB13/SCB18 Series FAQs

You may want to know the following questions and answers when purchasing.

Ⅰ.Basic Concepts

Oil-immersed transformers, dry-type transformers, pre-installed substations, high and low voltage switchgear and supporting power equipment

Supplement: Covers 10kV-500kV full voltage level, maximum capacity 500MVA

It must be determined based on the nominal voltage, grounding mode, and maximum fault current of the system!

For example, a 10kV neutral point is grounded by an arc suppression coil, and the matching capacity is suitable according to 1.2 – 1.5 times the total capacitance current of the system. You only need to provide the grid parameters (voltage, load, grounding method, etc.), and our technical team will choose the model for free to accurately adapt to your system.

①Safety performance: dry type has no fire risk and can be close to densely populated areas; The oil-immersed type requires fire prevention measures, and leakage may pollute the environment.

②Applicable scenarios: dry type is used indoor, medium and low voltage (≤ 35kV), power ≤ 30MVA; The oil-immersed type is used outdoor, high voltage (≥ 110kV), power ≥ 30MVA.

③Maintenance cost: dry type only needs dust removal and winding inspection (1-2 years); The oil-immersed type requires regular oil testing, oil filtration/oil change (3-5 years).

④Environmental performance: dry type pollution-free, RoHS compliant; The oil-immersed type requires a leak-proof design, and synthetic ester oil is degradable but the cost is high.

⑤Energy efficiency performance: dry full load efficiency of 98%-99%, high temperature needs to be reduced capacity; The oil-immersed type has a full load efficiency of 99%+ and is suitable for high-temperature environments.

⑥Service life: dry type 20-30 years (H grade can reach 40 years); Oil-immersed type 30-50 years (when the oil quality is good).

 

Selection suggestions

Choose dry type: indoor installation, high safety requirements, and easy maintenance scenarios

 

Choose oil-immersed type: high-capacity, high-pressure, outdoor installation scenarios

①35kV is suitable for large-capacity, high-voltage grid access scenarios above 2000kVA (such as regional substations, new energy booster stations), with higher insulation requirements (the withstand voltage value is about 2 times that of 10kV), and the structure is more complex;

②10kV is suitable for terminal power distribution below 2500kVA (such as factories and commercial centers), and the cost and maintenance are lower. The selection should give priority to matching the voltage and capacity requirements of the upper power grid.

The core difference between the two lies in energy efficiency and cost characteristics, which are recommended to be selected according to actual application needs:

①Amorphous Alloy Transformer (SCBH)

No-load loss is 60-70% lower than traditional silicon steel transformers, with great long-term energy savings and strong environmental benefits.

Higher initial cost (core materials cost 30-50% more).

Best for long idle periods, stable loads, and electricity cost-sensitive settings: data centers, commercial buildings, hospitals.

②Epoxy resin transformer (SCB).

Low initial cost, mature silicon steel technology, better short-term value.

High mechanical strength, strong short-circuit resistance, low noise, and adapts well to complex environments.

Ideal for standard industrial power distribution, high short-circuit risk, or stability-critical scenarios: factories, general power systems.

Selection suggestions:

If the focus is on long-term energy saving, long operating time, and stable load, choose SCBH;

If you are concerned about initial cost, short-circuit resistance and wide adaptability, choose SCB.

①Commercial complex: Dry-type transformer (AN cooling), high fire protection requirements, easy maintenance

②Offshore wind power booster station: oil-immersed transformer (synthetic ester oil), high power demand, anti-corrosion design

③Metro power distribution: dry-type transformer (H-class insulation), low-smoke halogen-free, moisture-proof and shockproof

④Oil platform: oil-immersed transformer (Ex d explosion-proof), explosion-proof certification, salt spray resistant

​

Notes:

①Dry-type transformer derating of 1% per 1°C at ambient temperature > 40°C

②The oil-immersed type needs to be equipped with an oil pool (capacity ≥ 100% oil volume) or a nitrogen fire extinguishing system

Large-scale projects can adopt the combination scheme of “dry change + oil change”

①SCB10: Level 3 energy efficiency, low price, suitable for small communities and light industrial plants with tight budgets

②SCB11: Energy efficiency is better than SCB10, affordable, suitable for small and medium-sized commercial establishments

③SCB12: Secondary energy efficiency, no-load loss is reduced by 22-25% compared to SCB10, suitable for medium-sized supermarkets, schools, and photovoltaic projects

④SCB13: Better energy efficiency and lower loss than SCB12, suitable for industrial enterprises and large communities with high energy saving requirements

⑤SCB14: First-class energy efficiency, high magnetic conductivity material, low PAD, IP54 protection, suitable for high-end scenarios such as data centers

⑥SCB18: ultra-efficient, 50% load efficiency of 99.34%, silent (48dB), strong anti-short circuit ability, suitable for hospitals and scientific research institutions

Ⅱ.Technical parameters

①Rated voltage

600V to 35kV on the primary side, 208V-480V on the secondary side, can be customized

②Power capacity

• Low power: 5-500kVA (commercial buildings and small equipment)

• Medium power: 500-2500kVA (data centers, medium-sized factories)

• High power: 2.5MVA+ (substation, heavy industry), maximum capacity 25MVA

③Insulation grade

• Class A (105°C): General Environment

• Class B (130°C): Slightly higher temperature resistance requirements

• Class F (155°C): Industrial Harsh Environments (Mainstream Choice)

• Class H (180°C): High temperature (e.g. smelting, steel mill)

• Rated R (220°C): Extreme environment applications

 

We offer a full range of insulation grades and cooling solutions that support customization.

①Efficiency performance

• No-load efficiency: up to 98%-99%

• Peak efficiency point of load: 60%-70% load

• Loss control: Reduce no-load and load losses through material and design optimization

Comply with global energy efficiency standards

②International standard: IEC 60076-20

• European Union: Ecodesign Regulation Tier 1 (2015) and Tier 2 (2021)

• North America: DOE 2016 in the United States, CSA C802.2 in Canada

• China: GB 20052-2020 (Level 1 Energy Efficiency Maximum)

• India: BEE Star Certification (1 to 5 Stars)

• ANZ: MEPS Energy Efficiency Specification

③Energy efficient design and technology

• Core material: high magnetic conductivity silicon steel or amorphous alloy, no-load loss reduced by 15%-30%

• Winding Optimization: Low-resistance copper windings or optimized aluminum winding designs to reduce load losses

• Insulation system: H/R grade high-temperature resistant material to improve thermal efficiency and life

• Intelligent cooling: intelligent temperature control and forced air cooling system dynamically adjust energy consumption

④Compliance benefits

• Economic benefits: 10%-30% reduction in energy costs over the life cycle

• Environmental Benefits: Reducing greenhouse gas emissions and supporting carbon neutrality

• Policy dividends: Meet DOE/EU Tier 2 and other standards, and enjoy tax rebates and subsidies

⑤The design, manufacture and inspection of dry-type transformers and all their parts and accessories produced by our company comply with the latest standards below.

• Basic general: IEC 60076-1 / GB/T 1094.1-2013, GB/T 1094.11-2022

• Energy efficiency and environmental protection: GB 20052-2020, T/CEEIA 258-2016

• Insulation withstand voltage: IEC 60076-3 / GB/T 1094.3-2017, GB/T 26218.1(2)-2010

• Test and testing: DL/T 596-1996, GB/T 50150-2016, IEC 60270 / GB/T 7354-2003

• Short circuit resistance: IEC 60076-5 / GB/T 1094.5-2008

• Temperature rise cooling: IEC 60076-2/GB/T 1094.2-2013, JB/T 8971-2013

• Acoustic performance: GB/T 1094.10-2022

• Protective structure: GB/T 4208-2008, JB/T 9639-1999

• Operation and maintenance: DL/T 572-1995

• High voltage test: GB/T 16927.1-2011 / GB/T 16927.2-2013

 

• Special applications: GB/T 10228-2023, GB/T 1094.12-2013

①Natural cooling (AN)

• Features: Fanless, silent design (<55dB)

• Applicable: Below 2500kVA, silent places such as commercial buildings

• Advantages: Zero additional energy consumption, maintenance-free and low cost

②Forced Air Cooling (AF)

• Features: Fan heat dissipation, support overload operation

• Applicable: above 1000kVA, high temperature and high load scenarios such as industrial plants

• Advantages: Increase capacity by 25-50%, adapt to harsh environments

③Hybrid Cooling (AN/AF)

• Features: Intelligent temperature control automatic switching

• Applicable: Data centers and other situations where the load fluctuates

• Advantages: Energy saving of 30-50%, both silent and efficient

Selection suggestions:

• Commercial premises: Natural cooling (AN)

• Industrial Scenario: Forced Air Cooling (AF)

• Fluctuating Load: Hybrid Cooling (AN/AF)

Customization options such as IP54 dustproof fans and intelligent temperature control are available.

Support full parameter customization (voltage 0.4-500kV, frequency 50/60Hz, protection level up to IP68, special environment adaptation)

①Electrical parameter customization: voltage 0.4-35kV input, 0.23-13.8kV output; capacity 10kVA~25MVA (expandable to 50MVA).

②Material selection: copper winding (efficiency 98.5%+) or aluminum winding (cost reduction of 30%); Oriented silicon steel or amorphous alloy core

③Cooling system: AN/AF/AN+AF intelligent switching; Heat pipe assists heat dissipation (temperature rise and fall 15K).

④Protection design: IP23 to IP66; Galvanized steel or 316 stainless steel (salt spray test > 1000h).

⑤Special environmental adaptation: high-altitude capacity correction; Explosion-proof certification (ATEX Zone 1/2).

⑥Intelligent functions: PT100 temperature measurement + IoT monitoring (4G/fiber); Dynamic volume adjustment technology

⑦Installation adaptation: floor-mounted, wall-mounted (≤500kVA), rail type; Narrow body structure (width compression 20%)

⑧Industry special customization: wind power special (anti-vibration, anti-tilt); Mining transformer (reinforced enclosure + 150% overload capacity).

⑨Global certification support: UL+cUL (North America), CE+TUV (EU), CQC+Energy Efficiency Label (China).

⑩Customized Processes: Requirements analysis→ scheme design→ prototype testing→ mass production

⑪Value-added customized cases: data center efficient silence solution, Antarctic research station extreme cold solution, chemical plant explosion-proof solution

 

Note: The non-standard customization cycle is 30%-50% longer, and there may be additional costs for extreme environment design.

Ⅲ.Installation and application

①environmental conditions

• Temperature: Standard ambient ≤ 40°C, overtemperature needs to be reduced (1% reduction for every 1°C increase)

• Humidity: Relative humidity < 95% (no condensation), IP55 shell is required for humid environments

• Pollution level: Coastal areas need Level IV protection design

②Space requirements

• Natural cooling (AN): 600mm ≥ all sides, 800mm ≥ top

• Forced air cooling (AF): 300mm ≥ on the inlet side and 500mm ≥ on the outlet side, reserving space for maintenance

③Foundation vs. fixation

• Foundation load-bearing: ≥1.5 times the weight of the transformer (including accessories)

• Mounting method: Floor-mounted (M16 anchor bolts), wall-mounted (load-bearing bracket≥ 200% safe load)

• Seismic fortification: Shock absorbers are installed

④Electrical safety

• Safety distance: 125mm between phases ≥of 10kV system, 100mm ≥ to ground (35kV requires ≥300mm)

• Grounding resistance: ≤4Ω (independent grounding), multiple units need to ≤ 1Ω

• Cable bending: Cross-linked cable ≥ 15 times the diameter

⑤Protective measures

• Enclosure protection: IP54/IP65 outdoor, IP20 indoor

• Fire protection requirements: F1 flame retardant (flame spread ≤ 100mm), refractory materials (≥2h)

⑥Special environment

• Explosion-proof area: Zone 1 requires ATEX certification (flameproof enclosure Ex d)

• High altitude: 1% capacity reduction for every 100m of elevation at > 1000m

 

It is recommended to have professional engineers guide the installation on site.

①Altitude adaptability

• Standard range: ≤1000m

• High altitude scheme (1000-5000m): 1% capacity reduction for every 100m of elevation, strengthening insulation, and upgrading forced air cooling

Example: A 2000kVA transformer has an usable capacity of 1500kVA at 3500m

②Temperature adaptability

• Conventional range: -25°C~+40°C (natural cooling)

• Low temperature scheme (-50°C): pre-heating device (PTC heater) + H-class insulation

• High temperature solution (+60°C): 1% volume reduction per °C when exceeding 40°C, using hybrid cooling (AN/AF automatic switching)

③Special environment configuration

High altitude type (4000m+): Pressurized air duct + anti-corona treatment

Extreme cold type (-50°C): low-temperature lubricating oil + stainless steel fasteners

Desert type (+60°C): sunscreen coating (reflectivity ≥80%) + IP54 + sand and dust resistant seal

④Typical application scenarios

• Plateau substation (3000m, -30~+35°C): 15% capacity reduction + H-class insulation + AF cooling, 25 years of life

• Polar research station (-50~+20°C): pre-heating system + fully enclosed IP55, life of 20 years

• Middle East Oilfield (-10~+55°C): Mixed cooling + sunscreen + corrosion-resistant plating, 18 years of life

Support customized solutions according to specific altitude and temperature.

①Noise source and range

• Core magnetostriction: 45-60dB

• Cooling system: natural cooling 40-55dB, forced air cooling 55-70dB

• Load impact: 30% load drop by 5dB, 100% load increase by 3-5dB

②Noise reduction technology and effect

• Core optimization (stepped lamination + high magnetic conductivity silicon steel): 5-8dB reduction, cost +8-12%

• Cooling system noise reduction (low-noise fan + variable speed control): 10-15dB reduction, cost +5-10%

• Vibration isolation installation (rubber mat + spring bracket): 3-5dB reduction, cost +3-5%

• Sound insulation cover (double-layer steel plate + sound-absorbing cotton): 15-25dB reduction, cost +15-25%

③Scene noise limit

• Residential area at night: ≤45dB (AN cooling + vibration isolation required)

• Commercial Daytime: ≤60dB (AF Cooling + Basic Vibration Isolation Allowed)

• Industrial area: ≤75dB (can be directly installed with AF cooling)

④Testing and customization

• Test standard: Background noise is 10dB lower than the sound source, measurement distance 1m (ANSI) or 0.3m (IEC)

• Ultra-quiet solution: ≤ 48dB (2000kVA) in AN mode, equipped with step laminated iron core + silicone rubber shock absorber

Note: The actual noise needs to consider on-site factors, and it is recommended to simulate the sound field.

Ⅳ. Operation and maintenance and assurance

No! Routine maintenance once every 1-2 years is sufficient, mainly for surface dust removal, insulation resistance measurement, and grounding connection check; Forced air-cooled models have their lower fan status checked annually.

Compared with oil-immersed transformers, the dry structure is maintenance-free, saving the troubles of oil change and oil level checking, and the operation and maintenance cost is much lower.

①Life expectancy

• Standard condition: 20-30 years (regular load, indoor environment, basic maintenance).

• Ideal conditions: more than 40 years (optimized load, strict maintenance, class H insulation).

• Harsh environment: < 15 years (high temperature and high humidity/no protection).

②Life factors and maintenance points

• Material selection

Adopt H-grade insulation to extend the life by 5-10 years

Amorphous alloy/high magnetic conductivity silicon steel core can extend the life of 10-15 years

• Operational control

Optimal 80% load rate

For every 10°C increase in ambient temperature, life is reduced by 50%

Harmonic THD>5% will shorten the life by 20%-40%

• Environmental requirements

Indoor: Humidity < 70% + regular dusting

Outdoor: IP55/IP65 protection required

• Maintenance measures

Real-time monitoring of hot spot temperature (H-level ≤ 180°C)

Annual inspection: winding resistance, partial discharge

Three-year test: short-circuit impedance

Continuous monitoring of harmonic THD (target<5%)

③Life extension program

• Customized solution: H-grade insulation + copper winding (promised 35 years of life, annual inspection required)

• Intelligent monitoring: Install IoT remote monitoring system

• Maintenance plan: Establish a preventive maintenance system and record operating data

By optimizing material selection, operational control, and maintenance strategies, dry-type transformer lifespan can be significantly extended. It is recommended to choose the appropriate configuration and maintenance scenario according to the specific application environment.

Strong environmental adaptability! For high temperatures in the Middle East, H-class insulation (withstand 180°C) + forced air cooling scheme is available;

In the face of high humidity in Southeast Asia, it adopts moisture-proof epoxy resin + IP54/IP65 protection (dustproof and waterproof), -25°C~+50°C wide temperature range design, covering extreme environments such as deserts and rainforests.

Triple transportation protection!

①Packaged in a fully enclosed wooden case (in line with international shipping standards), filled with cushioning material;

②additional reinforcement of key components (windings, cores);

 

③Provide sea/air reinforcement solutions, with detailed installation and commissioning guides, and can remotely guide acceptance after arrival.

The basic warranty is 24 months, which can be extended to 5 years

Supplement: Warranty covers manufacturing defects with free remote technical support

Worldwide quick response! 7×24 hours Multilingual remote technical support (English, Spanish, Arabic, etc.); Overseas core regions (Europe, America, the Middle East, Southeast Asia) promise 72-120 hours of on-site service; Configure full-time overseas service representatives for full-cycle follow-up, 10-year spare parts supply (price ≤110% of the original price), and a team of certified engineers to quickly repair faults.

Our dry-type transformer products meet the world’s mainstream certification requirements and pass rigorous extreme conditions to provide customized solutions for special application environments.

①Certification system

Quality Management System: ISO 9001, ISO 14001, ISO 45001

International electrotechnical standards: IEC 60076-11, IEC 60076-16, IEC 60529

②Regional Market Certification:

• NA: UL 1561, UL 1446, CSA C22.2 No.47

• EU: RoHS, REACH, EU Ecodesign

• US: DOE 2016, ANSI/IEEE C57.12.01

• UK: BS EN 60076-11

Special application certifications: DNV GL/ABS (Marine/Offshore Platforms), IEC 60332-3/IEC 61034 (Fire Safety).

③Validation test

The product has been tested under a number of extreme conditions to ensure reliability:

• High altitude test: IEC 60076-3 (power frequency withstand voltage test, +20% voltage).

• Low temperature start test: GB/T 2423.1 (-50°C cold start, 2 hours).

• High temperature operation test: GB/T 2423.2 (+60°C continuous full load thermal stability test).

④Selection suggestions

• Base Market: ISO 9001 + IEC 60076-11 + Regional Safety Certifications (UL/CSA/CQC).

• EU market: RoHS/REACH/EU Ecodesign added

• Special environments: Optional IP protection, wind power or marine certification

 

The company’s products have passed international mainstream certifications, supporting global market compliance access, and can provide customized solutions for specific application needs.

Full cooperation!

We can assist in contacting international testing institutions such as SGS and Intertek to provide factory test reports and certification documents.

 

For overseas special certifications (such as SASO in the Middle East and CSA in North America), the technical team assists in the preparation of materials and on-site testing throughout the process to ensure the implementation of project compliance.

Ⅴ. Frequently Asked Questions

After receiving the complete technical parameters, within 24 hours for standard products and 48 hours for customized products

Key parameters such as rated capacity, voltage level, and insulation level need to be provided

15 working days for standard products, 25-40 working days for customized products

Expedited service can be reduced to 10 working days (20% expedited fee)

Sea freight about $800-$3000/container (40HQ), land freight $0.5-$1.2/km

 

Provide EXW/FOB/CIF and other trade terms, including professional export packaging

We offer flexible payment options, the common ones are:

T/T: 30% deposit, 70% paid before shipment.

L/C: Accept L/C at sight.

For long-term cooperation, we can provide more favorable terms.

①61 years of manufacturing experience (established in 1963), fully automatic production line (±0.1mm accuracy), ISO 9001/14001 dual certification, 48-hour global emergency service

②Spare sleeves, special kits, and multilingual manuals are included with the goods

③Free installation guidance videos, lifetime cost optimization consultation, trade-in discounts for old equipment, and exclusive energy efficiency audit services for strategic customers

①Regular consultation: response time within 2 hours, operation guidance, parameter query, support 400 call/WhatsApp

②Emergency fault handling: response time within 30 minutes (7×24 hours), remote diagnosis + on-site engineer dispatch (72 hours worldwide arrival).

③Preventive maintenance: appointment arrangement, annual inspection + oil sample testing (oil immersion type), customer portal independent appointment

Note: Export products meet IEC standards, and additional UL/CE/PES and other certifications can be provided (cycle increase by 2-3 weeks). Customized products require a 30% advance payment, and the 3D model is provided before production.

Why Choose us ？

Built to last, engineered to perform.

Kete Transformer is a key national-level manufacturer specializing in transformers, recognized as a “Contract-Honoring and Promise-Keeping” enterprise, a high-tech enterprise, and a national-level enterprise technology center. It is recommended in the national directory for rural and urban power grid construction and renovation, as well as a recommended supplier of major electromechanical equipment for hydropower projects. Its products have been awarded the title of “National Quality Inspection Qualified Product – Quality Trustworthy Product” and “Nationally Recognized Product for Mechanical Industry Users.

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Our Project

Our products not only dominate the domestic market but are also exported to more than 30 countries and regions, including Russia, Southeast Asia, Africa, and the Americas, serving industries such as power, municipal engineering, metallurgy, and petrochemicals.

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