1. Product Overview
The YADA CTF Series Split-Core Current Transformer is a precision AC measurement device designed for energy monitoring, power metering, and protection systems. With a wide measuring range of 5A to 800A, it offers accuracy classes 0.5 and 1.0, ensuring reliable performance in industrial and commercial power distribution networks.
Its split-core design allows for quick installation without disconnecting existing wiring—ideal for retrofit applications and field maintenance.
2. Key Features
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Wide Measuring Range: Primary current from 5A to 800A; secondary current 2mA–100mA.
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High Accuracy: Available in Class 0.5 and 1.0 for metering-grade performance.
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Split-Core Design: Enables easy and safe installation without cutting the conductor.
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High-Quality Magnetic Core: Vacuum heat-treated core provides low loss and high sensitivity.
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Flame-Retardant PA Enclosure: Ensures high safety and mechanical strength.
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Built-In Protection Circuit: Prevents damage to personnel and devices during open-circuit operation.
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Compliance: Meets GB/T 20840.2–2014 / IEC 61869–2 international standards.
3. Technical Specifications
| Model | Rated Input Current | Rated Output Current | Accuracy Class | Burden | Dimensions (mm) L×H×W1×W2 | Hole Diameter Ø (mm) |
|---|---|---|---|---|---|---|
| CTF10 | 5A–50A | 2mA–20mA | 0.5 / 1.0 | 30Ω | 30.5 × 44.3 × 27 × – | 10 |
| CTF16L | 5A–100A | 2mA–40mA | 0.5 / 1.0 | 30Ω | 35.8 × 49.3 × 32 × 40 | 16 |
| CTF24T | 200A–300A | 0.1A | 0.5 | 20Ω | 55 × 79.5 × 38 × 46.5 | 24 |
| CTF35T | 400A–600A | 0.1A | 0.5 | 20Ω | 66 × 93 × 40 × 48.6 | 35 |
| CTF50T | 500A–800A | 0.1A | 0.5 | 20Ω | 87 × 116 × 47.5 × 56.5 | 50 |
4. Operating Conditions
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Operating Temperature: –40 °C to +70 °C
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Relative Humidity: 10%–95%
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Altitude: ≤4000 m
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Rated Voltage: 0.66 kV
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Insulation Voltage: AC 3.0 kV/min (secondary to ground)
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Frequency: 50 Hz
5. Applications
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Energy Management Systems (EMS) – Accurate current detection for data acquisition and monitoring
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Power Distribution Panels & Switchgear – Current sensing and protection feedback
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UPS and Inverter Systems – AC load monitoring and current measurement
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Industrial Control Cabinets – Process automation and electrical fault monitoring
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Smart Grid and Renewable Energy Systems – Real-time load analysis and energy optimization
6. Installation & Precautions
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Designed for AC circuits with voltage ≤0.66 kV.
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Connect secondary terminals S1 and S2; ensure correct polarity (P1→S1, P2→S2).
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Do not leave the secondary circuit open while primary is energized.
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After re-closing the core, ensure the magnetic circuit is properly aligned.
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Maintain tightness and minimize vibration during installation for best accuracy.
7. Why Choose YADA CTF Series
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30+ years of expertise in current sensing and power metering
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Full CE, RoHS, and ISO certifications
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OEM / ODM service for system integrators and manufacturers
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Reliable export quality with proven performance in over 80 countries
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Compatible with most international energy meters and protection relays