The SCTK667B series double-screw split-core current transformer is designed for current measurement and monitoring in new or existing power distribution networks. Measuring range is 5A to 3000A. The product uses a split-core structure that allows quick installation without disconnecting or removing cables or busbars. The wide window design accommodates large-diameter cables or busbars. Double-screw fastening ensures secure and reliable installation. The secondary winding has a built-in precision parallel resistor, providing a safe low-voltage output without the need for external sampling resistors. Multiple sizes are available to adapt to various existing installation conditions. It is widely used for current measurement, monitoring, and protection in power lines and equipment, as well as current and power measurement for motors, lighting, air compressors, HVAC, and automation control systems, as well as energy monitoring and relay protection devices.
Features
- Measuring range – 5A-3000A
- Split-core structure – no cable removal required
- Double-screw fastening – secure installation
- Built-in precision resistor – safe low-voltage output
- Wide window – accommodates large cables and busbars
- Multiple sizes available
- Suitable for new and retrofit projects
- Saves installation time and cost
Applications
- Power line current measurement and monitoring
- Electrical equipment current protection
- Motor current and power measurement
- Lighting system power monitoring
- Air compressor current monitoring
- HVAC systems
- Automation control systems
- Energy monitoring and relay protection devices
Electrical Parameter
| Frequency | 50-400Hz |
| Rated Input | 5A-3000A |
| Measuring range | 5%In-130%In |
| Rated Output | 0-10V(AC) or 0-5A |
| Ratio | ≤ ± 0.1％ |
| Phase angle | ≤ ±5min |
| Dielectric strength | 3.0KV/1mA/1min |
| Insulation Resistance | DC500V/100MΩmin |
Mechanical Parameter
| Case | ABS /UL94-V0 |
| Bobbin | PBT |
| Core | Silicon steel |
| Internal structure | Epoxy |
| Construction | Tie |
| Operating Temp | －25℃～＋75℃ |
| Operating Humidity | ≤85% |
| Output Connection | Terminal |
Type selection
| P/N | Rated Input (A) | Output (A/V/mA) | Accuracy | Dimensions(mm) |
|---|
| | | | Ø0 | A | B | C | D |
|---|
| SCTK667B-025 | 0-400A | 1A/5A
0-10V
0-500mA | 0.1,0.2
0.5,1.0 | 25 | 100 | 70 | 33 | 32 |
| SCTK667B-032 | 0-630A | 1A/5A
0-10V
0-500mA | 0.1,0.2
0.5,1.0 | 32 | 110 | 83 | 33 | 32 |
| SCTK667B-045 | 0-1000A | 1A/5A
0-10V
0-500mA | 0.1,0.2
0.5,1.0 | 45 | 123 | 96 | 33 | 32 |
| SCTK667B-055 | 0-1500A | 1A/5A
0-10V
0-500mA | 0.1,0.2
0.5,1.0 | 55 | 134 | 106 | 33 | 32 |
| SCTK667B-080 | 0-2000A | 1A/5A
0-10V
0-500mA | 0.1,0.2
0.5,1.0 | 80 | 168 | 139 | 33 | 32 |
| SCTK667B-100 | 0-3000A | 1A/5A
0-10V
0-500mA | 0.1,0.2
0.5,1.0 | 102 | 198 | 168 | 33 | 32 |
Notes: Product specifications can be customized
FAQ
Q: What are the advantages of double-screw fastening?
A: Double-screw fastening ensures the transformer remains securely locked onto the cable or busbar after installation. It will not loosen or shift due to vibration or external forces, ensuring safe and reliable installation. Compared to snap-on structures, double-screw fastening provides stronger clamping force, suitable for high-current and high-vibration environments.
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, eliminating the need for external sampling resistors. This simplifies installation, improves safety, and saves component costs and installation space.
Q: What window sizes are available for this product?
A: The wide window design accommodates large-diameter cables or busbars. Multiple sizes are available to adapt to various existing installation conditions. For specific window dimensions, please refer to the product datasheet or contact our sales team.
