OEM Three Phase Dry Type 50kVA Traction Energy Saving Indoor Power Transformer

Three Phase Epoxy Resin Dry Transformer 2000kVA 11kv/415V Power CE Certified IP54
Brief Description
This epoxy resin cast dry-type transformer uses high-quality silicon steel core and copper windings, encapsulated with epoxy resin under vacuum casting. It has no insulating oil, featuring flame retardant, explosion-proof, low partial discharge, low noise and minimal maintenance. Ideal for indoor power distribution, high-rise buildings, hospitals, data centers, subway, photovoltaic and wind power stations. Suitable for environments with strict fire safety & environmental requirements.

Epoxy Resin Cast Coil: Vacuum cast epoxy resin encapsulates copper winding, high mechanical strength, anti-short circuit capability.
Silicon Steel Laminated Core: Low loss cold rolled silicon steel sheet, optimized core structure to reduce noise & no-load loss.

Three Phase Epoxy Resin Dry Transformer 2000kVA 11kV/415V Power CE Certified IP54

Temperature Controller: Real-time winding temperature monitoring, alarm and trip protection.

Mounting Base & Bracket: Heavy-duty steel base for stable installation.

Enclosure (Optional IP20/IP30): Prevent accidental touch and dust ingress.

Application Scenarios

1.Commercial & residential high-rise buildings
2.Hospitals, schools, public facilities
3.Data centers
4.Metro / tunnel projects
5.Solar & wind renewable power plants
6.Industrial workshops

Product Advantages
1. Fire Safety – IEC 60076-11 Class F1
Epoxy resin self-extinguishes instantly. No oil – ideal for hospitals, subways, data centers, and high-rises.
2. Zero Maintenance & Low Operating Cost
No oil checks, pits, or separate rooms required. Lower total cost than oil-immersed units.
3. Energy Efficiency – CE 60076 Level 2
~30% lower no-load losses vs. SCB12. Operating noise: 45-52 dB(A).
4. Short-Circuit Withstand
Vacuum casting and full-oblique core joints provide up to 8% impedance withstand.
5. Partial Discharge < 5 pC
Vacuum casting eliminates voids, achieving <5 pC PD for decades of reliable insulation.
6. Compact & Environmentally Friendly
30-50% smaller footprint. No contamination risk. Installable at load centers. Fully recyclable.

Production Process

Insulated wire is wound on moulds with layer and end insulation, then windings are inspected, demoulded and preassembled before heat drying. Windings are placed in moulds for vacuum epoxy resin casting and constant-temperature curing, followed by demoulding, finishing and lead connection. Silicon steel sheets are stacked to form the iron core, then HV and LV windings are assembled with air duct insulation. Internal wiring is finished and pre-tests are performed. The enclosure, temperature sensor, fan and terminal box are installed. The transformer undergoes final tests including partial discharge, withstand voltage, no-load and load tests. After painting, nameplate and marking, the unit is cleaned, packed and ready for delivery.
Technical Specifications – SCB12-800/10 Dry-Type Transformer

No.	Parameter	Specification
1	Energy Efficiency Class	SCB12
2	Rated Capacity	800 kVA
3	Rated Voltage (HV/LV)	10 kV / 0.4 kV
4	Rated Current (HV/LV)	46.19 A / 1154.7 A
5	Voltage Ratio	10 ± 2 × 2.5% / 0.4 kV
6	Short-Circuit Impedance	6%
7	Vector Group	Dyn11
8	Rated Frequency	50 Hz
9	Insulation Class	Class F
10	Temperature Rise Limit	100 K
11	Rated Insulation Level	35/5 kV
12	Lightning Impulse Withstand Voltage (HV Side)	75 kV
13	Power Frequency Withstand Voltage (HV Side)	35 kV / 60 s
14	Power Frequency Withstand Voltage (LV Side)	5 kV / 60 s
15	Power Frequency Withstand Voltage (Neutral Point)	5 kV / 60 s
16	No-Load Loss	1.215 kW
17	Load Loss	6.96 kW
18	No-Load Current	0.70%
19	Efficiency	≥99%
20	Partial Discharge Level	<10 pC
21	Noise Level	≤60 dB

Company Profile

Jiangsu Shendian Electric Co., Ltd. was established in August 2007. Headquartered in Jiangsu Province, China, the company occupies a site area of 25,000 square meters, housing 30,000 square meters of production floor space across its multi-level manufacturing workshops, and employs more than 150 professionals.

As an integrated power distribution equipment manufacturer, Shendian Electric specializes in the R&D, engineering design, manufacturing, sales, installation, and operation & maintenance of advanced electrical solutions. The company is committed to developing intelligent power distribution systems and providing reliable, energy-efficient products for customers worldwide.

The company’s core product portfolio includes:

Energy-saving epoxy cast resin dry-type transformers up to 35 kV

Energy-efficient oil-immersed distribution transformers

Photovoltaic step-up transformers for renewable energy projects

Prefabricated substations

HV, MV, and LV switchgears, including Schneider authorized switchgear panels

Product Range:

• Epoxy resin cast dry-type transformers (≤35 kV)

• Oil-immersed transformers

• Photovoltaic boost transformers

• YB12 box-type substations

• Intelligent high/low-voltage switchgear

• Prefabricated box transformers for EV charging

• Smart charging piles

• Distributed photovoltaic products

Certificates and Test Reports

Global market case
EV Gigafactory, Shangha
Deployed across renewable energy plants, urban distribution networks, industrial facilities, commercial buildings, and critical infrastructure.

Oil-Immersed Transformers – Indonesia
Export Power Distribution
S13/S20 series oil-immersed distribution transformers supplied for Indonesian grid and industrial networks.
Dry-Type Transformers – Australia
Export Commercial building
SCB14/SCB18 series cast-resin dry-type transformers, 11/22 kV class, supplied to Australian commercial and data-center networks. Fire-safe, maintenance-free, engineered to AS/NZS 60076.

Total Quality Management (TQM)

ISO 9001, ISO 14001, ISO45001 certified. Full-chain quality control from material to delivery.

A. Incoming Quality Control (IQC)
All raw materials undergo full testing before production. Non-conforming materials rejected.

B. In-Process Quality Control (IPQC)
10+ QC inspections: core stacking, excitation, winding resistance, insulation, partial discharge, dimensional checks.

C. Final Quality Control (FQC)
Every unit 100% tested before shipment:

Routine Tests (IEC 60076-11):
• Winding resistance
• Voltage ratio & vector group
• No-load loss & current
• Load loss & short-circuit impedance
• Insulation resistance
• Applied voltage (hi-pot)
• Induced voltage
• Partial discharge (<5 pC)

Type Tests (on request):
• Temperature rise
• Lightning impulse (95 kV)
• Short-circuit withstand
• Acoustic noise

Special Tests:
• Zero-sequence impedance
• No-load current harmonic analysis

Transportation

Shipping Methods:
• Sea (FCL/LCL) via major Chinese ports: 15-45 days.
• Rail: China-Europe Railway Express: 15-20 days.
• Road: Regional deliveries.
• Air: For urgent small shipments.
Trade Terms:
EXW, FOB, CIF.
Lead Time:
• 30-630 kVA: 20-30 days.
• 800-2,500 kVA: 35-45 days.

FAQ:

1.Q: What are the main advantages of dry-type transformers compared with oil-immersed ones?
A: Dry-type transformers feature fire resistance, low pollution, simple maintenance and compact structure. They are suitable for indoor, densely populated and high-safety occasions.

2.Q: What is the insulation class of your cast resin dry-type transformer?
A: Our standard cast resin dry-type transformers adopt Class F or Class H insulation, which can meet different ambient temperature requirements.

3.Q: Can you customize the transformer capacity and voltage ratio?
A: Yes. We support customization of capacity, HV/LV voltage ratio, tap range and other parameters according to your project requirements.

4.Q: What is the normal working temperature and alarm temperature of the transformer?
A: The normal operating temperature depends on insulation class. We equip temperature sensors; the default alarm temperature is set at 130°C and trip at 150°C for Class F.

5.Q: Does the dry-type transformer come with cooling fans and enclosure as standard?
A: The basic unit is without enclosure and fans. Cooling fans and metal enclosure are optional accessories upon customer request.

6.Q: What tests will be carried out before delivery?
A: Each unit will complete routine tests including resistance, transformation ratio, insulation resistance, partial discharge and power frequency withstand voltage test before shipment.

7.Q: What is your lead time for production?
A: Normally 25–40 working days after receipt of deposit and confirmation of technical specification. Exact time depends on order quantity and customization.

8.Q: What warranty do you provide?
A: We offer a 24-month warranty from the date of shipment or 18 months after commissioning, whichever comes first, against manufacturing defects.

9.Q: What environmental conditions are required for installation?
A: It should be installed in dry, clean indoor space, altitude ≤1000m, ambient temperature between -20°C and +40°C, without corrosive gas or conductive dust.

10.Q: Do you provide installation guidance or after-sales service overseas?
A: We supply detailed installation and operation manuals. Overseas on-site service can be arranged at extra cost if needed.

Packaging
1. Transformers Package
Packed in solid plywood wooden cases. The crates are reinforced with timber frames, equipped with bottom skids for forklift handling. Internal moisture-proof and shockproof protection is applied to safeguard electrical parts during sea & land transit.
2. Large Prefabricated substation / Complete Substation package
No wooden box packing. The whole unit is fixed and secured on flatbed trucks with tension straps. We adopt professional heavy-load binding scheme, and take protective measures on exposed fittings. Direct shipment as an integrated module to cut re-assembly work for clients.
All packages comply with export shipping standards, suitable for ocean freight, land transportation and multi-modal transport