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42 Categories · 6871+ Models
QDTB® Product Portfolio
QDTB® is a leading transformer and substation manufacturer in China with 25+ years of experience. Our product portfolio covers the full spectrum of power equipment for generation, transmission, distribution, and utilization.
- Dry-Type Transformers Cast resin dry-type transformers with epoxy insulation, fire-safe for indoor installation.
- Oil-Immersed Transformers Oil-immersed transformers from S11 to S20 series, high-efficiency and energy-saving.
- Box-Type Substations European-type (compact), American-type (pad-mounted) prefabricated substations, factory-assembled.
- Amorphous Alloy Transformers Amorphous alloy core transformers with ultra-low no-load losses for energy efficiency.
- Switchgear & Ring Main Units HV/LV switchgear, ring main units, reactors, and cable branch boxes.
All products are ISO 9001 certified and CE marked, complying with IEC/IEEE/GB standards.
Explore Products by Application
Power Transmission & Distribution
Transformers, switchgear, substations and reactive compensation for power transmission and distribution networks.
Industrial Power & Control
Control transformers, voltage regulators, UPS and power supplies for industrial equipment and automation.
Solar Power and Energy Storage
PV modules, inverters, batteries and balance-of-system equipment for solar generation and energy storage projects.
All Product Categories
Dry-Type Transformers
1436 model
Oil-Immersed Transformers
1274 model
Special/Isolation/Control Transformers
2112 model
Amorphous Alloy Transformers
363 model
Box-Type Substations
57 model
Reactors
406 model
Cable Branch Boxes & Switching Stations
7 model
Ring Main Units (RMU)
13 model
High Voltage Switchgear
83 model
Low Voltage Switchgear
114 model
Single Phase Transformers
209 model
Three Phase Transformers
97 model
Voltage Regulators
64 model
Variable Transformers
58 model
Inverters (DC-AC)
5 model
DC Power Supplies
147 model
Battery Chargers
92 model
Motor Starters
55 model
UPS (Uninterruptible Power Supply)
6 model
Power Capacitors
17 model
Solar PV Modules
11 model
String Grid-tie Inverters
18 model
Hybrid Solar Inverters
11 model
Energy Storage Batteries
10 model
PCS Power Conversion Systems
8 model
Battery Management Systems (BMS)
6 model
ESS Fire Suppression Systems
4 model
PV Mounting Structures
6 model
DC Cables, Connectors & SPD
8 model
Monitoring, Protection & SCADA
4 model
Cables, Trays, Grounding & Fasteners
15 model
Energy Storage Containers
5 model
Busway (Bus Duct)
27 model
EV Charging Stations
9 model
Pole-Mounted Switchgear
9 model
SVG & SVC Static Var Compensation
13 model
Active Harmonic Filters
10 model
Automatic Transfer Switches
23 model
Diesel Generator Sets
19 model
EPS Emergency Power Supply
18 model
Wind Turbines
6 model
SCADA & Secondary Automation
16 model
Engineering Calculators
Use our professional engineering tools to size and price your project in minutes.
Distribution System Calculator
Design a complete power distribution system — transformer, HV & LV switchgear, cables, busbar and grounding — with a full bill of materials and reference FOB price.
Open Calculator →Solar System Configurator
Size your solar array, storage and balance-of-system, and get an instant bill of materials.
Open Calculator →Frequently Asked Questions
QWhat is the typical lead time for transformer orders?
Standard transformers: 30-45 days. Custom or large-capacity units: 60-90 days. This is significantly faster than Western manufacturers who typically require 18-24 months. Rush orders can be accommodated for urgent projects.
QDo you provide OEM/ODM services?
Yes. We offer full OEM/ODM capabilities including custom design, private labeling, and specification modifications to meet your specific project requirements and local standards.
QWhat certifications do your products hold?
Our products are ISO 9001/14001/45001 certified, CE marked on selected models, and designed to meet IEC, IEEE, and GB standards.
QWhat is your minimum order quantity?
We accept orders starting from 1 unit for standard products. For custom-designed equipment, please contact our sales team for MOQ details based on specifications.
QDo you provide after-sales technical support?
Yes. We provide comprehensive after-sales support including installation guidance, commissioning assistance, operator training, and 24/7 remote technical support. On-site service is available globally.
QCan you customize products for specific environments?
Absolutely. We design equipment for extreme conditions including high altitude, high temperature, high humidity, coastal/corrosive environments, and seismic zones. Share your requirements and we will engineer a solution.
QWhat payment terms do you accept?
We accept T/T (bank transfer), L/C (letter of credit), and other major international payment methods. Typical terms are 30% deposit with 70% before shipment. We can discuss flexible terms for long-term partnerships.
QDo you provide technical documentation in English?
Yes. All products come with comprehensive English documentation including user manuals, technical specifications, test reports, and installation guides. We also provide CE and other certification documents as needed.