Product overview
The VTEKE SK88 Series is a split core current transformer for current measurement in low-voltage electrical systems. The core is closed by screws and nuts, so the transformer can be installed on an existing cable or busbar without breaking the primary circuit — which makes it suited to retrofits and to panels that cannot be taken out of service. Different current ratios, accuracy classes and rated burden (VA) options are available to meet various measurement requirements.
Designed for retrofit and maintenance work in low-voltage installations: the core opens so the transformer can be fitted around an existing cable or busbar without disconnecting the conductor, converting high primary currents into standardized current values suitable for electrical measuring, metering and monitoring devices.
Key features
- Split core current transformer, closed by screws and nuts
- Primary current range: 250–2000 A
- Maximum hole size: 80 × 80 mm
- Accuracy classes: Class 3.0, Class 1.0 or Class 0.5
- Rated power up to 30 VA
- Fits over an existing cable or busbar without disconnecting it
- Screw type covered terminals
Specifications
Standards
| Standards | IEC 60044-1, IEC 61869-2, VDE 0414-1, DIN57414, BS3938, BS7626, EN 61869-2 |
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Electrical characteristics
| Rated Power | Up to 30 VA |
|---|---|
| Accuracy Class | Class 3.0, Class 1.0 or Class 0.5 |
| Test Voltage | 3 kV for 1 min |
| Surge Current Limitation Factor | FS 5 |
Mechanical characteristics
| Terminal | Screw type covered terminals |
|---|---|
| Case | Non-flammable, self-extinguishing polycarbonate |
| Mounting | On cable or busbar by screws |
Environmental characteristics
| Ambient Temperature (Operation) | -25 °C to +85 °C |
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Specific technical characteristics of current sensors
| Max. System Voltage | 0.72 kV |
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| Number of Inputs | 1 |
| Primary Conductor | 80 × 80 mm |
Current measurement circuit
| Secondary Current | 5 A |
|---|---|
| Rated Frequency | 50 Hz … 60 Hz |
| Thermal Rated Short-Time Current | Ith = 60 In |
| Thermal Rated Continuous Current | Id = 1 × In |
| Primary Current Range | 250/5 A to 2000/5 A |
Technical documents
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