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Indoor current sensor KECA 80 D85 (split core type)

Electronic instrument transformers (Sensors) offer the current measurements for the protection and monitoring of medium voltage power systems up to 4000 A, up to 0.72 kV.

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 D85 is intended for use in current measurement in air and gas insulated medium voltage switchgear.

The current sensor is split core type equipped with a clamping system which provides easy and fast installation and therefore makes the sensor suitable for retrofit purposes.

The current sensors can be used for both measuring and protection purposes. 
 
Product scope
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
 
Application
Primary and secondary air and gas insulated switchgear (AIS and GIS), optimized sensor design for retrofit purposes
 
Key benefits

  • Easy and fast installation 
  • Small dimensions, light weight
  • Fast and easy design process
  • High flexibility
  • Minimaze cost during operation
  • Increase safety and reliability

Key features

  • Up to 4000 A
  • High accuracy up to 0.5
  • Delivered with secondary cable and RJ45 connector
  • High linearity
  • Large dynamic range

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