PZKHCT Split Core Current Transformer 100A Coil Sensor

PZKHCT Split Core Current Transformer – 100A Coil Sensor for Energy Meters

The PZKHCT Split Base Current Transformer is a compact, fully enclosed coil sensor designed for accurate current measurement up to 100A. Engineered for energy meters operating on AC 220V or 380V power supplies, this mini split-core CT sensor offers outstanding mechanical durability, strong voltage isolation, and effortless clamp-on installation — no need to cut power or interrupt your circuit during setup.

Key Features

• Mini Split-Core Design: One of the smallest split-base current transformers of its class (100mA output), ideal for tight installations.
• Snap-Joint Structure: Clamps directly onto existing cables using nylon ties — no wire cutting or power shutdown required.
• 16mm Inner Hole Diameter: Accommodates a wide range of cable sizes with ease.
• High Accuracy: ≤0.5 grade accuracy ensures reliable current measurement for energy metering applications.
• Fully Enclosed Housing: Excellent mechanical properties, environmental resistance, and strong voltage isolation for safe, dependable operation.
• Wide Temperature Range: Operates from -40°C to +85°C, suitable for demanding environments.
• UL94-V0 Flame Resistance: Built to meet international flame-retardant standards.
• Built-In Input Coil: Lightweight and easy to install without specialized tools.

Technical Specifications

Important Installation Notes

1. Connect the CT primary in series with the test current loop; the secondary must operate in short-circuit state.
2. The secondary circuit must never be left open — do not install a fuse on this side.
3. Never open-circuit the secondary side. Always connect wiring to the secondary side first, then the primary. When removing, disconnect the primary side first, then the secondary.
4. Ensure wire diameter matches hole diameter; select a specification with an inner hole diameter larger than your wire diameter. Fully fasten the opening/closing surfaces until you hear a clear "click" — the latch must be completely locked.
5. This transformer measures alternating current only (50/60Hz).

What's in the Box

• 1 × PZKHCT Split Core Current Transformer

Made in Mainland China.

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Frequently Asked Questions

Q: What is a split-core current transformer and how does the PZKHCT work?

A: A split-core current transformer (CT) clamps around an existing cable without cutting or disconnecting it. The PZKHCT uses a snap-joint mechanism: open the clamp, place it around the cable, and close until you hear a click. It then measures the alternating current flowing through the cable (up to 100A) and outputs a proportional 100mA signal, which is fed into your energy meter for accurate power monitoring.

Q: Can I install this current transformer without turning off the power?

A: Yes — one of the key advantages of the PZKHCT split-core design is that it installs directly onto the live cable without the need to cut power or interrupt your circuit. Simply snap it around the conductor and secure it with a nylon tie. Always follow the wiring sequence instructions: connect the secondary side first, then the primary, for safe installation.

Q: Is this transformer compatible with both 220V and 380V systems?

A: Yes. The PZKHCT is designed for use with energy meters on both AC 220V and AC 380V power supply systems, operating at frequencies of 50Hz or 60Hz, making it suitable for a wide range of residential and commercial applications.

Q: What cable size can fit through the 16mm inner hole?

A: The inner hole diameter is 16mm, accommodating most standard cables used in residential and light commercial wiring. Always verify that the outer diameter of your cable is smaller than 16mm before installation, and ensure the latch locks fully with an audible click for a secure fit and accurate reading.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.