SCB18 400kVA 11kV Three Phase Dry Type Distribution Transformer for Commercial Building

Product Details
FAQs
Packing & Delivery

Key technical innovation points:

Low-Loss Core Design：High-grade grain-oriented silicon steel with step-lap mitred joints reduces no-load loss by 15–20% vs conventional models

Epoxy Resin Cast Coil：Vacuum pressure impregnation (VPI) casting eliminates partial discharge, ensures moisture resistance and extends insulation life

Fire-Safe Construction：No oil, no explosion risk. Epoxy resin is self-extinguishing, meeting strict fire codes for indoor and crowded areas

Partial Discharge Control：PD level below 10pC at rated voltage, verified by factory partial discharge test on every unit

Overview

The cast resin dry-type transformer is a three-phase distribution transformer whose windings are encapsulated in epoxy resin under vacuum pressure. Unlike oil-immersed transformers, it contains no insulating liquid, making it inherently fire-safe and environmentally clean.

Designed for indoor installation, the transformer uses air as the cooling medium (natural AN or forced AF with fans). It is widely deployed in commercial buildings, data centers, hospitals, metro systems, industrial plants and other locations where fire safety, low noise and zero maintenance are critical requirements.

Structural Features

Core：High-grade grain-oriented silicon steel sheet, step-lap mitred cutting, low no-load loss and low noise

HV Winding：Epoxy resin cast, copper foil or wire, vacuum pressure impregnation, excellent insulation and PD control

LV Winding：Copper foil winding with inter-layer insulation, strong short-circuit withstand capability

Clamping Structure：Steel tie rods and pressure plates ensure solid coil clamping, preventing looseness under short-circuit

Enclosure：Optional IP20 / IP23 sheet steel or aluminum enclosure with ventilation grilles and protection grille

Temperature Control ：Built-in PTC / PT100 sensors and temperature controller with fan start, alarm and trip functions

Product Structure Introduction

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.

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

Data Center & Critical Loads

Urban & Commercial Distribution

Solar & Wind Step-Up Stations

Heavy Industry & Mining

Mining & Remote Sites

Utility & EPC Projects

Product parameters

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

Our advantages

Guaranteed Loss Values

No-load and load loss figures are contractually guaranteed and verified by routine test reports — no hidden energy cost.

100% Copper Winding

We use pure copper conductors, not aluminum. Higher conductivity, lower load loss, longer service life.

Every Unit Tested

Routine tests (ratio, resistance, insulation, PD, no-load/load loss) on every transformer before shipment.

Custom Engineering

We design to your specification — special voltages, impedance, vector groups, noise limits and accessories.

Fast Lead Time

Standard models ship in 25–35 days. Batch orders with phased FAT and delivery to match your project schedule.

Complete Documentation

Datasheet, GA drawing, wiring diagram, test reports, O&M manual, material certificates — all ready for site acceptance.

Manufacturer Advantages

Full in-house production from core processing to final testing, key processes non-outsourcing.

Independent test lab, support routine test, type test and FAT for project acceptance.

Powerful custom engineering, comply with IEC and various local utility specifications.

Traceable high-grade raw materials with material certificates provided.

Reliable lead-time, support batch & phased delivery for EPC projects.

Complete technical documentation package for overseas tender & site acceptance.

Export-standard moisture-proof & shock-proof packing for long-distance ocean shipping.

Global remote technical support and clear warranty policy.

9.About us

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

AT JIANGSU SHENDIAN ELECTRIC, TECHNOLOGICAL INNOVATION IS DRIVEN BY A CONTINUOUS COMMITMENT TO QUALITY, RELIABILITY, AND CUSTOMER VALUE. THE COMPANY BRINGS TOGETHER A TEAM OF EXPERIENCED PROFESSIONALS WHO ARE PASSIONATE ABOUT THE POWER INDUSTRY AND DEDICATED TO SUPPORTING THE GLOBAL TRANSITION TOWARD SAFER, SMARTER, AND MORE SUSTAINABLE ENERGY SYSTEMS.

BY COMBINING EXTENSIVE INDUSTRY EXPERIENCE, ADVANCED MANUFACTURING TECHNOLOGIES, PROFESSIONAL EXPERTISE, AND INDEPENDENTLY DEVELOPED PRODUCTION EQUIPMENT, SHENDIAN ELECTRIC CONTINUOUSLY IMPROVES ITS PRODUCT CAPABILITIES AND MANUFACTURING STANDARDS. THROUGH COOPERATION WITH DOMESTIC AND INTERNATIONAL POWER INDUSTRY PARTNERS AND THE INTRODUCTION OF LEADING TECHNICAL TALENT, THE COMPANY DELIVERS STANDARDIZED, RELIABLE, LOW-CARBON ELECTRICAL PRODUCTS DESIGNED TO MEET THE EVOLVING NEEDS OF MODERN POWER SYSTEMS.

WITH A STRONG FOCUS ON QUALITY, INNOVATION, AND SUSTAINABILITY, JIANGSU SHENDIAN ELECTRIC AIMS TO BECOME A TRUSTED GLOBAL PARTNER IN INTELLIGENT POWER DISTRIBUTION AND CLEAN ENERGY SOLUTIONS.

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.

Q1: What is the main advantage of dry-type transformer compared with oil-immersed transformer?

A1: Dry-type transformer adopts epoxy resin casting structure, no flammable transformer oil. It features fire resistance, low pollution, low noise and easy maintenance. It can be installed indoors or close to load side, which is ideal for data centers, commercial buildings and crowded public areas.

Q2: Can your dry-type transformer meet IEC standards? What certificates can you provide?

A2: Our dry-type transformers are designed and tested in accordance with IEC 60076-11. We can provide CE, ISO test certificates, type test reports and routine test reports. If you have local grid standards or tender requirements, we can do targeted design and compliance verification.

Q3: What is the insulation class of your dry-type transformer? What maximum temperature can it withstand?

A3: Normally we offer F class or H class insulation. F class allows 105K temperature rise; H class can bear 125K temperature rise. We will select proper insulation class according to your ambient temperature and load requirements.

Q4: Can you customize parameters such as voltage ratio, vector group and impedance voltage?

A4: Yes. We support full customization. Please provide rated capacity, high & low voltage, frequency, vector group, impedance, cooling method and protection requirements. Our engineering team will review and offer a compliant design for your project.

Q5: What is the noise level of your dry-type transformer? Can it be used in noise-sensitive areas?

A5: Our dry-type transformers adopt optimized core and winding structure to control noise. Normally noise ranges from 50–65dB according to capacity. For shopping malls, office buildings and data centers with strict noise limits, we can add shock absorbers and noise reduction design.

Q6: Does dry-type transformer need regular oil replacement or oil maintenance? A6: No. Since there is no transformer oil, you do not need oil testing, oil filling or oil replacement. Regular work only includes surface dust cleaning and connection inspection, greatly reducing long-term operation and maintenance cost.

Q7: What protection accessories can be equipped for the dry-type transformer?

A7: We can match temperature control fan system, temperature controller, over-temperature alarm & trip device, shock absorber, enclosure IP20/IP30 cabinet and other accessories, to realize temperature monitoring and automatic cooling.

Q8: What is your lead time for dry-type transformers? Can you support bulk order for EPC projects?

A8: Lead time depends on model, quantity and test requirements. Standard models have shorter cycle. We have independent dry-type production line, support bulk production, separate FAT and phased delivery to match your EPC project schedule.

Q9: What documents will you deliver together with the transformer?

A9: We supply datasheet, general arrangement drawing, wiring diagram, operation & maintenance manual, routine test report, material certificate and packing list. Type test report can be provided upon request for tender or third-party inspection.

Q10: What warranty and after-sales service do you provide?

A10: Our standard warranty period is clearly stated in the sales contract. We provide remote technical guidance for installation and commissioning, spare parts supply and after-sales consultation. We have a clear response channel to solve your technical problems during project operation.

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.

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