The SCTK673 series split-core current transformer is designed for current measurement and monitoring in new or existing power distribution networks. Measuring range is 5A to 1000A, with output of 0-10V (AC) or 0-5A. The product uses a split-core structure that allows quick installation without disconnecting or removing cables or busbars. This significantly reduces installation cost and time. The secondary winding has a built-in precision parallel resistor, providing a safe low-voltage output. Epoxy encapsulation ensures excellent insulation performance. The double-screw fastening design and wide window accommodate large-diameter cables or busbars. Accuracy classes cover Class 0.2, Class 0.5, and Class 1.0, meeting different requirements from precision metering to general protection. It is widely used in power monitoring, motor current and power measurement, lighting, air compressors, HVAC, automation control systems, and relay protection devices.
Features
- Split core current transformer with interleaved joint and hinge structure
- Wide range of sizes to accommodate all the existing installations
- Split core CT current transformer
- Epoxy Potting, Double-screw fastening
- Wide inner window, allowing clamping of big cables or bus-bars
- Test range: 5 to 1000A AC input, output of 0-10V(AC) or 0-5A
- High accuracy and reliability
- Test hole series size clamp leaker AC current transformer
- Inherit the simple structure of the traditional C cores
- Clamp-on core design, safer, easier installation, portable, don’t need to cut of the grid-power when adjust the inductance.
- Energy conservation & environment protection, huge potential market
Applications
Power monitoring and energy management
Motor current and power measurement
Lighting system power monitoring
Air compressor current monitoring
HVAC systems
Automation control systems
Relay protection devices
Power distribution line current monitoring and protection
Electrical Parameter
| Frequency | 50-400Hz |
| Rated Input | 5A-1000A |
| Measuring range | 5%In-130%In |
| Rated Output | 0-10V(AC) or 0-5A |
| Ratio | ≤ ± 0.2% |
| Phase angle | ≤ ±10min |
| Dielectric strength | 2.5KV/1mA/1min |
| Insulation Resistance | DC500V/100MΩmin |
Mechanical Parameter
| Case | PC /UL94-V0 |
| Bobbin | PBT |
| Core | Silicon steel |
| Internal structure | Epoxy |
| Construction | Tie |
| Operating Humidity | ≤85% |
| Operating Temp | －25℃～＋75℃ |
| Output Connection | UL101522AWGWire(twinstedwire)2.5m |
Type selection
| P/N | Rated Input (A) | Output (mA/V) | Accuracy | Dimensions(mm) |
|---|
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| Ø | A | B | C | D | E | F | G | Ø1 | Ø2 |
| SCTK673A-025 | 5-400A (5,100,250,400A) | 0-200mA 0-10V | 0.2 0.5 1.0 | 25 | 100 | 100 | 42 | 60 | 87 | 72 | 22 | 16 | 5 |
| SCTK673B-045 | 50-1000A (50,250,400,1000A) | 0-500mA 0-10V | 0.2 0.5 1.0 | 45 | 123 | 123 | 42 | 80 | 109 | 94 | 23 | 16 | 5 |
Notes: Product specifications can be customized
FAQ
Q: Does the split-core current transformer require power-off or cable removal during installation?
A: No. The SCTK673 series uses a split-core snap-on structure with a core that opens and closes. It can be installed without disconnecting or removing any cables or busbars. It is especially suitable for retrofit projects and applications where power cannot be turned off, significantly reducing installation costs and time.
Q: What accuracy classes are available for this product?
A: Three accuracy classes are available: Class 0.2, Class 0.5, and Class 1.0. Class 0.2 is suitable for precision energy metering. Class 0.5 is suitable for general industrial measurement. Class 1.0 is suitable for protection applications and conventional indicating instruments. Please select based on the accuracy requirements of your application.
Q: What is the function of the built-in precision resistor?
A: The secondary winding has a built-in precision parallel resistor. It converts the current signal directly into a safe low-voltage output (0-10V or 0-5A), eliminating the need for external sampling resistors. This simplifies installation, improves safety, and saves component costs and installation space.
Q: What are the advantages of epoxy potting?
A: Epoxy resin potting provides excellent insulation, moisture-proof, dust-proof, and corrosion protection. The double-screw fastening design ensures secure and reliable installation. The completely enclosed structure ensures long-term stable operation of the transformer in various harsh environments.
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