Product Overview
Engineered for demanding low-voltage power distribution and energy monitoring applications, the YADA YDBH0.66-I-G series current transformers deliver high accuracy and reliability. Certified to CE & LVD standards, this CT family supports primary currents from 5 A up to 2000 A (with secondary 1 A or 5 A), making it a versatile choice for power monitoring cabinets, smart power distribution units and industrial control panels.
Key features include high-temperature tolerance (-40 °C to +150 °C), an ambient altitude rating up to 4000 m and a compact footprint — ideal for export-oriented OEMs and EPC contractors.
| Model | Rated input current | Rated output current | Rated overload | Accuracy | Dimesion(mm) | Aperture (mm) |
| YDBH0.66-30I-G | 5A~600A | 5A or 1A | 0.1VA ~ 20VA | 0.2, 0.2s, 0.5, 0.5s, 1.0 |
60*81*36 | 23 |
| YDBH0.66-40I-G | 60A~1000A | 75*98*41 | 31 | |||
| YDBH0.66-60I-G | 300A~2000A | 102*133*45 | 45 |
Key Features & Benefits
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Wide primary current range: 5 A to 2000 A, with standard secondary output of 1 A or 5 A — supports major metering and monitoring infrastructures.
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Multiple accuracy classes available: Class 0.2, 0.5, 1.0 and the special 0.2s / 0.5s variants — enabling precise billing-grade metering as well as system-control applications.
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Low‐voltage rated for 0.66 kV systems: Suits typical distribution panel installations and smart power cabinets.
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High ambient & altitude resilience: Operating range down to -40 °C and up to +150 °C, with altitude rating ≤ 4000 m — ensures stable performance in harsh environments.
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Compact design & flexible installation: Apertures of 23 mm, 31 mm and 45 mm, and rectangular profile suited for three-phase arrangement in control panels.
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Certified quality: CE Certification No. TASH-250918444-V1, assuring compliance with international safety and performance standards.
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Customisable: Manufacturer enables custom design in 3 days, sample in 7 days — facilitating tailored CTs for export projects.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | YDBH0.66-I-G (and variants YDBH0.66-30I-G / YDBH0.66-40I-G / YDBH0.66-60I-G) |
| Rated primary voltage | 0.66 kV |
| Rated current (primary) | 5 A to 2000 A |
| Secondary current | 1 A or 5 A |
| Accuracy classes | 0.2, 0.5, 1.0, 0.2s, 0.5s |
| Operating temperature | -40 °C to +150 °C |
| Altitude | ≤ 4000 m |
| Relative humidity | 10 % to 95 % |
| Aperture sizes | 23 mm / 31 mm / 45 mm |
| Certification | CE (LVD) – No. TASH-250918444-V1 |
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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Energy monitoring and billing points in low-voltage distribution boards (e.g., factories, commercial buildings)
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Current sensing in smart power cabinets and sub-distribution units for industrial automation
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Integration with power monitoring systems and PLCs for system diagnostics and performance tracking
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Use in electrical switchgear assemblies requiring compact, high-accuracy CTs for retrofit or new installations
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Export projects (EPC, OEM) requiring component compliance (CE, LVD) and rugged performance in varied environmental zones
Why Choose This Series for Your Projects?
From an engineering perspective, accurate current measurement is foundational. When you specify a CT with an accuracy class of 0.2 or 0.5, you ensure that downstream metering or monitoring equipment receives reliable data — which in turn supports good energy management, fault detection and system efficiency.
By offering a broad primary current range, altitude and temperature tolerance, and modular installation apertures, the YDBH0.66-I-G series gives you flexibility across various global export markets — an ideal fit when your factory is targeting 100% export (as your business model states).
Additionally, from an SEO and sourcing standpoint:
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Incorporates key engineering terms like “low-voltage”, “current transformer”, “0.66 kV”, “Class 0.2”, “metering”, “5A secondary”, “industrial control panel CT” — helping attract relevant search traffic.
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Specifically designed for B2B engineers and procurement specialists looking for precise specs and certifications, which enhances credibility.
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Emphasises the export capability and customisation, which differentiates you from commodity CT suppliers and supports higher-value positioning.
Installation & Usage Guidelines
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Ensure correct orientation: observe the H1/H2 primary terminals and X1 secondary terminals to maintain polarity. Incorrect connections may result in measurement errors.
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Match CT ratio closely to the maximum expected load current: selecting a ratio significantly above the normal operating current may reduce low-current accuracy.
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For metering accuracy, ensure the secondary burden (meter + wiring) stays within the CT’s rated load to maintain class performance.
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The CT secondary must never be left open-circuited while primary current is flowing — this may lead to dangerously high voltages.
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Choose the appropriate aperture size (23/31/45 mm) to fit the conductor or busbar in your installation — correct sizing improves installation efficiency and safety.
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Verify the installation location (altitude, temperature, humidity) and ensure the CT rating aligns with environmental conditions (this series supports up to 4000 m, -40 °C to +150 °C).
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When exporting, declare proper markings and documentation (CE certification, test reports) to assist customs and project procurement.
