ACREL AKH-0.66 L-C Series Residual Current Transformer
ACREL AKH-0.66 L-C Series Residual Current Transformer is a round-window residual current transformer that detects earth leakage current in low voltage circuits. It outputs a small secondary signal to fire monitoring, motor protection or leakage relay devices, and is available in five aperture sizes from 30 mm to 105 mm to suit different cable diameters.
The ACREL AKH-0.66 L-C Series Residual Current Transformer is a residual current transformer built to pick up leakage current in low voltage electrical systems. The cable or busbar passes through the transformer's round window, and any imbalance between the outgoing and returning current, which indicates leakage to earth, is detected and converted into a proportional output signal.
How it works
- The primary conductor passes through the transformer's aperture
- Under normal conditions, current flowing out and returning through the conductor is balanced, so no signal is produced
- If earth leakage occurs, the resulting imbalance is sensed by the transformer core
- The transformer outputs a proportional secondary current signal, which is sent to a connected monitoring or protection device
Why choose this series
- Confirmed compatibility with TT, TN-S, TN-C, TN-C-S and IT electrical systems
- Works with Acrel's ARCM electrical fire monitors, ARD motor protection controllers and ASJ residual current relays
- Five aperture sizes available, so there's a model suited to most low voltage cable or busbar diameters
- UL94-V0 fire retardant rated housing
Benefits
- Straightforward round-window design that fits over existing cabling during installation
- Consistent accuracy class across the range, so switching between aperture sizes doesn't mean a trade-off on measurement precision
- Suited to both new installations and retrofits where leakage monitoring is being added to existing switchboards
