Sensors based on alternative principles have been introduced as successors to conventional instrument transformers in order to significantly reduce size, increase safety, and to provide greater rating standardization and a wider functionality range.
The current sensor is based on the principle of Rogowski-coil. The sensor consists of an air-core winding, immune of any risk of saturation as it has no ferromagnetic core. It is linear over the whole measuring range. The output signal is a voltage, which is proportional to the derivative of the current. A digital integration of this voltage is carried out by IED and gives the measured current.
The current sensor type KECA 80 C85 is intended for use in current measurement in gas insulated medium voltage switchgear. The design of the current sensor has been optimized to be easily assembled on the shielded cable T-connectors and therefore makes the sensor suitable for retrofit purposes.
The current sensors can be used for both measuring and protection purposes.
Combined current accuracy class 0.5/5P630
Secondary cable with connector type, shielded RJ-45 Cat. 6, fully compatible with ABB Relion® product family IEDs
Primary and secondary gas insulated switchgear (GIS), optimized sensor design for retrofit purposes
- Easy and fast installation
- Small dimensions, light weight
- Fast and easy design process
- High flexibility
- Minimize cost during operation
- Increase safety and reliability
- Up to 4000 A
- High accuracy up to 0.5
- Delivered with secondary cable and RJ45 connector
- High linearity
- Large dynamic range