Split Core CBCT (Core Balance Current Transformer)
Flexible Earth Leakage Monitoring for Existing Installations
The HS Grup Split Core CBCT Series is specifically designed for earth leakage current detection in existing electrical installations where disconnecting cables or busbars is difficult or impractical. The split-core design allows the transformer to be opened and installed around existing conductors without interrupting power or dismantling the system.
When used with Earth Leakage Relays (ELR), the Split Core CBCT provides accurate residual current monitoring and reliable earth fault protection for industrial and commercial applications.
Key Features
- Split-core design for easy retrofit installation
- No need to disconnect existing cables or busbars
- High sensitivity earth leakage current detection
- Compatible with Earth Leakage Relays (ELR)
- Suitable for large busbar and cable systems
- Robust industrial construction
- Easy opening and closing mechanism
- Reliable performance in demanding environments
- Ideal for panel upgrades and maintenance projects
Applications
- Existing Electrical Switchboards
- MCC Panels
- Power Distribution Systems
- Industrial Plants
- Generator Protection Systems
- Transformer Protection
- Data Centers
- Commercial Buildings
- Renewable Energy Systems
- Solar Power Plants
- Retrofit Earth Leakage Protection Projects
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Split Core Core Balance Current Transformer |
| Frequency | 50/60 Hz |
| Ratio | 1000/1 |
| Surge Voltage Resistance | 3 kV |
| Test Voltage | 3 kV AC / 1 Minute |
| Insulation Resistance | DC 500V / 100 MΩ |
| Protection Class | IP20 |
| Operating Temperature | -45°C to +55°C |
| Ambient Temperature | -20°C to +55°C |
| Standards | IEC 60947-2 |
Available Models
KCBCT-1-36-10
| Specification | Value |
|---|---|
| Opening Size | 360 × 100 mm |
| Rated Current | 5000 A |
| Type | Split Core |
KCBCT-1-50-10
| Specification | Value |
|---|---|
| Opening Size | 500 × 100 mm |
| Rated Current | 5500 A |
| Type | Split Core |
KCBCT-1-20-20
| Specification | Value |
|---|---|
| Opening Size | 200 × 200 mm |
| Type | Split Core |
KCBCT-1-30-30
| Specification | Value |
|---|---|
| Opening Size | 300 × 300 mm |
| Type | Split Core |
How Split Core CBCT Works
The Split Core CBCT continuously monitors the vector sum of all phase conductors and neutral passing through the core.
Under normal conditions, the sum of currents is zero. When an earth leakage fault occurs, the resulting imbalance creates a residual current signal that is detected by the CBCT and transmitted to the connected Earth Leakage Relay (ELR), enabling alarm indication or circuit disconnection.
Installation Advantages
Fast Retrofit Installation
Unlike conventional closed-core CBCTs, split-core models can be installed around existing cables and busbars without disconnecting conductors.
Reduced Downtime
Installation can often be completed without shutting down critical equipment, reducing maintenance costs and operational interruptions.
Ideal for Large Busbars
The large rectangular opening accommodates high-current busbar systems commonly found in industrial and commercial switchboards.
Compatible Products
Fully compatible with:
- HS Grup KAR-1 Earth Leakage Relay
- Earth Leakage Protection Systems
- Residual Current Monitoring Systems
- Generator Protection Panels
- Main Distribution Boards (MDB)
- Motor Control Centers (MCC)
Benefits
✓ Easy installation on existing systems
✓ No cable disconnection required
✓ Reliable earth leakage detection
✓ Suitable for large busbars and cable bundles
✓ Reduced installation time
✓ Increased system safety
✓ Industrial-grade performance
✓ Long operational life
