Product Overview
Engineered for precision measurement and instrumentation in low-voltage power distribution panels, the YADA Standard EN 61010 Instrument & Metering Transformer series delivers reliable performance, compliance and flexibility. Certified under the EN 61010‑1 safety standard, this transformer is suited for metering, monitoring and control applications in power system engineering. It allows you to integrate accurate measurement of currents and voltages into your switchgear, power monitoring units or control cabinets — making it ideal for global export EPC projects and OEM power-system integrators.
● Primary current range: 100A to 7500A, secondary current: 5A or 1A.
A full range of specifications is available, covering accuracy classes 0.2S, 0.5S, 0.2, 0.5, and 1.0；
● The core undergoes high-vacuum heat treatment, ensuring excellent performance and stable accuracy；
● The housing is made of high-impact, flame-retardant PC material, offering reliable safety and an attractive appearance；
● Equipped with a flip-open transparent terminal cover for easy wiring；
● Easy installation using pressure plate fixation；
● The performance meets the standard of CE (EN 61010-1:2010+A1:2019).
| Model Specification | Rated Input Current | Rated Output Current | Dimensions (mm) |
| W*L*H | |||
| YDBH0.66-30Ⅱ-B | 100A~600A | 5A / 1A | 62*101*45 |
| YDBH0.66-40Ⅱ-B | 150A~1200A | 78*106*41 | |
| YDBH0.66-50Ⅱ-B | 150A~1500A | 87*116*45 | |
| YDBH0.66-60Ⅱ-B | 300A~2500A | 102*128*45 | |
| YDBH0.66-60×50Ⅱ-B | 300A~2500A | 102*145*45 | |
| YDBH0.66-80Ⅱ-B | 400A~3000A | 117*122*45 | |
| YDBH0.66-80×50Ⅱ-B | 400A~3000A | 120*144*45 | |
| YDBH0.66-100Ⅱ-B | 500A~4000A | 145*128*45 | |
| YDBH0.66-100×50Ⅱ-B | 500A~4000A | 145*158*50 | |
| YDBH0.66-100×80Ⅱ-B | 600A~4000A | 152*193*55 | |
| YDBH0.66-120Ⅱ-B | 800A~5000A | 174*171*48 | |
| YDBH0.66-120×70Ⅱ-B | 1000A~5000A | 160*196*60 | |
| YDBH0.66-130Ⅱ-B | 1000A~5000A | 176*163*50 | |
| YDBH0.66-150Ⅱ-B | 1000A~6000A | 210*179*55 | |
| YDBH0.66-180Ⅱ-B | 1500A~6300A | 239*184*60 | |
| YDBH0.66-220Ⅱ-B | 1500A~6300A | 280*193*60 | |
| YDBH0.66-260Ⅱ-B | 1500A~6300A | 320*194*60 | |
| YDBH0.66-260×70Ⅱ-B | 2000A~7500A | 308*221*63 |
Key Features & Benefits
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Comprehensive safety certification: Complies with EN 61010 safety standard for measurement, control and laboratory electrical equipment.
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Designed for instrumentation & metering: Tailored for accurate signal conversion in low/medium-voltage systems used by engineers for monitoring, control and billing-grade measurement.
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High-quality insulation and construction: Meets the demands of metering circuits where precision and safety are critical — for example providing correct signal ratios and protection of secondary circuits during faults.
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Optimised for export & global deployment: With CE certification and standards compliance, it is suited for projects in Europe, Asia, Africa or wherever export systems require recognised certification.
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Flexibility in application: Whether used in smart power cabinets, sub-distribution switchboards or integrated into power monitoring racks, this transformer offers the reliability engineers expect.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | EN 61010 (Instrument & Metering Transformer) |
| Application | Instrumentation, metering, monitoring in low/medium-voltage systems |
| Input/Output Current | 100A to 7500A/ 5(1)A |
| Accuracy Class | classes 0.2S, 0.5S, 0.2, 0.5, and 1.0 |
| Insulation Level / Rated Voltage | 0.66 kV |
| Ambient Operating Temperature | -40 °C to +120 °C |
| Mounting / Installation | Panel-mount, DIN-rail, busbar clip, depending on variant |
| Certification | CE mark, EN 61010 compliance, test report available |
| Lead Time & Packing | Standard export-safe packaging; lead times subject to order size |
Certifications
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CE Certification: Meets Standard of EN 61010-1:2010+A1:2019, Certificates No.: TASH-250918444-V3
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Complies with international safety standards for current transformers
Typical Application Scenarios
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Precision instrument-transformer for metering panels in low-voltage distribution boards of commercial buildings or industrial plants.
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Integration into smart power monitoring cabinets where accurate measurement of current/voltage is required for energy management systems or PLC inputs.
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Use in export projects (EPC / OEM) where components must meet recognised international standards (CE, EN) and the transformer forms part of a power-system control panel or sub-distribution assembly.
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Retrofits or new installations where you need instrumentation-grade transformation and accuracy to support system diagnostics, load analysis, energy efficiency, and regulatory compliance.
Installation & Usage Guidelines
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Ensure correct primary and secondary connections: follow the polarity markings and installation recommendations.
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Match the transformer ratio to the expected measurement range to maintain accuracy and avoid overloading the secondary.
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The secondary circuit must never be left open under load — ensure secondary circuits are always terminated properly (meter or burden) to prevent high voltage hazards.
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Confirm the installation environment (temperature, humidity, positioning, clearance) meets the transformer’s rated conditions.
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For metering-class accuracy, ensure burden (wiring + meter + load) is within the rated load for the transformer.
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During installation in export systems, document certification (CE, test reports) and part numbers to assist with customs, procurement and project documentation.
Why Choose YDBH0.66-II-B Series for B2B?
1. Designed for Global Standards
The YDBH0.66-II-B current transformer complies with IEC and CE (EN 61010) requirements, ensuring full compatibility with international electrical systems. This makes it ideal for export-oriented OEMs and EPC contractors working across Europe, the Middle East, and Asia-Pacific markets.
2. High Measurement Accuracy for Professional Applications
With multiple accuracy classes (0.2, 0.5, 1.0) and wide primary current range, this series supports precise metering and monitoring—critical for power quality analysis, load management, and intelligent distribution systems.
3. Reliable and Durable Construction
Built with flame-retardant materials and advanced insulation technology, the YDBH0.66-II-B ensures long-term stability even under harsh industrial conditions (-40 °C to +120 °C, ≤ 4000 m altitude).
4. Compact Design for Easy Integration
Its slim profile and flexible mounting options allow fast installation in low-voltage switchgear, control cabinets, and power monitoring panels—saving valuable space and installation time.
5. Factory Direct Supply for B2B Projects
YADA provides direct manufacturing support with short lead times, OEM customization, and sample delivery within 7 days. This helps distributors, integrators, and system builders accelerate project deployment.
6. Proven Export Experience
With over 30 years of expertise in smart power measurement and 100 % export-oriented production, YADA is a trusted partner for global clients seeking certified, reliable, and cost-effective current transformers