Current Transformers
TK40 Series Toroidal Current Transformer
Primary Current (A)
Secondary Current (A)
Accuracy Class
Burden (VA)
Choose primary current, secondary current, accuracy class, burden to see the product code.
Product overview
The VTEKE TK40 Series is a toroidal current transformer designed for current measurement in low-voltage electrical systems using 40 mm busbars. It offers multiple current ratios, accuracy classes and rated burden (VA) options for a wide range of metering, monitoring and electrical distribution applications.
Designed to convert high primary currents into standardized current values suitable for electrical measuring, metering and monitoring devices in low-voltage installations.
Key features
- Window-type current transformer
- Primary current range: 200–800 A
- Busbar capacity: 40 × 10 mm
- Round conductor: Ø30 mm
- Various mounting options
- Sealable terminal cover
Specifications
Electrical characteristics
| Rated Power | Up to 10 VA |
|---|---|
| Accuracy Class | Class 1, 0.5, 0.5S, 0.2, 0.2S, 0.1 |
| Test Voltage | 3 kV for 1 min |
| Surge Current Limitation Factor | FS 5 |
Mechanical characteristics
| Terminal | Integral terminal cover, high cross-section brass terminal for extra safety |
|---|---|
| Case | Non-flammable, self-extinguishing ABS/PC |
| Mounting | Various mounting options |
Environmental characteristics
| Ambient Temperature (Operation) | -25 °C to +85 °C |
|---|---|
| Protection Class / IP Rating | IP20 |
Specific technical characteristics of current sensors
| Max. System Voltage | 0.72 kV |
|---|---|
| Primary Conductor | 40 × 10 mm |
| Round Conductor | Ø 30 mm |
| Number of Inputs | 1 |
Current measurement circuit
| Primary Current Range | 200 A to 800 A |
|---|---|
| Secondary Current | 5 A |
| Thermal Rated Short-Time Current | Ith = 60 × In |
| Thermal Rated Continuous Current | Id = 1 × In |
| Rated Frequency | 50/60 Hz |
Standards
| Standards | IEC 60044-1, IEC 61869-2, VDE 0414-1, DIN 57414, BS3938, BS7626, EN 61869-2 |
|---|
Technical documents
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