High-Precision Current &
Voltage Transformers
Current and voltage transformers engineered to IEC and GB standards under ISO 9001 quality management — for power distribution, substations and industrial applications.
Trusted Transformer Manufacturing
Since 2012
Full range from 6 kV to 110 kV — covering 11 kV, 24 kV, 33 kV and 66 kV systems worldwide — produced under ISO 9001 quality control with OEM/ODM customization.
Complete Metering & Protection Solutions
Current and voltage transformers, combined transformers, outdoor metering units and metering boxes — customized to your ratios, accuracy classes and local grid requirements.
Premium Quality Transformers
Daulma Electric manufactures current & voltage transformers to IEC and GB standards under ISO 9001 — reliable power solutions worldwide.
About Us
Daulma Electric
Years of Experience
Professional Instrument Transformer Manufacturer Since 2012
Founded in 2012 in Wenzhou, the hub of China's electrical industry, Daulma Electric is a specialized manufacturer of instrument transformers and high-voltage metering equipment. Certified to ISO 9001 and engineered to IEC and GB standards, our CTs, VTs, combined transformers and metering units cover 6 kV to 110 kV — serving utilities and industrial customers across Southeast Asia, Europe, Africa and the Americas.
Standardized Plant Area
Professional Employees
Voltage Range Coverage
Projects & Installations
Application Scenarios
Powering Every Industry with Precision
From utility substations to renewable energy, Daulma instrument transformers deliver accurate metering and dependable protection wherever power is measured.
Power Distribution
CTs, VTs and metering units for MV/HV distribution networks and utility grids.
Industrial & Mining
Robust measurement and protection equipment for harsh industrial environments.
Railway Systems
Instrument transformers for 27.5 kV traction power and railway electrification.
New Energy
Metering solutions for photovoltaic plants, wind farms and energy storage.
Substations
Complete measurement and protection equipment packages for power substations.
Transmission
Instrument transformers for transmission networks and EPC projects.
Why Daulma Electric
What We Are Proud Of
A specialized developer and manufacturer of instrument transformers and high-voltage power metering equipment — serving power metering, monitoring, protection and control applications worldwide.
Certified Quality
ISO 9001 certified production with CE approval. Designed and tested to IEC and GB standards, with in-house type-test and routine-test facilities.
16,000 m² Manufacturing Base
Modern factory in Wenzhou with advanced production and testing equipment and 100+ skilled employees — stable capacity and reliable lead times.
R&D & OEM/ODM
Custom ratios, accuracy classes, burdens, insulation levels and enclosure designs — engineered to your drawings and local grid requirements.
Global Export Experience
Products serving power systems across Southeast Asia, Europe, Africa and the Americas — backed by responsive technical support.
What's New
Latest News & Articles
Company updates, industry insights and technical articles from Daulma Electric.
RECT-0.66 Indoor Cast-Resin Current Transformer
RECT-0.66 series indoor cast resin current transformers with Ø38/66/78mm aperture options for 100A-800A primary current measurement in low-voltage AC systems.
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JDZX9-20 / JDZX11-20 Indoor Epoxy Cast-Resin Voltage Transformer
JDZX9-20 and JDZX11-20 indoor epoxy cast-resin voltage transformers for 15kV-24kV systems. Single-phase design with multiple accuracy classes (0.2, 0.5, 1.0,…
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JLSZY(F)-6.10W Outdoor Current and Voltage Transformer 6/10kV
Product Overview The JLSZY(F)-6.10W combined transformer is an outdoor silicon rubber and epoxy cast-resin three-phase three-component measurement device designed for…
View More →FAQs
FAQs For Overseas Buyers
Quick answers about customization, ordering, MOQ, delivery, and factory visits at Daulma Electric.
Do you offer OEM/ODM and product customization?
Yes. We offer full OEM/ODM services for CTs, VTs, combination transformers, and metering devices. Ratios, accuracy classes, insulation levels, mounting designs, nameplates, and packaging can be customized to your standards.
What is your MOQ and how can we start an order?
MOQ is flexible. For trial orders, we can supply 1–3 sample units at normal pricing. Simply share your drawings or specifications, and our engineers will confirm the technical solution, lead time, and provide a detailed quotation accordingly.
What voltage range and products do you manufacture?
Our core product lines include CTs, VTs, high-voltage metering boxes, and combination transformers, covering 6kV–110kV for power metering, monitoring, and protection in grids and industrial systems.
What are the lead time and global delivery options?
Standard models ship quickly, and customized orders follow the agreed schedule. Typical global delivery time is about 25 days, with secure export packing and complete documents provided.
Are your products certified and compliant?
Daulma Electric is ISO 9001 certified. Our transformers are designed and tested to IEC and GB standards, with CE approval for export markets. Full test reports and certificates are available.
Can we visit your factory or arrange an inspection?
Absolutely. Overseas buyers are welcome to visit our factory anytime. We also support third-party inspections and remote video audits before shipment.
Quality Assurance
Global Certifications & Patents
We have rich product testing reports and certificates to ensure that our products meet customer needs.
Get In Touch
Ready to Power Your Next Project?
Send us your requirements and receive a tailored quotation from our engineering team within 24 hours.
- Free technical consultation
- OEM & ODM customization supported
- Factory-direct pricing, worldwide delivery