Sensored Separable Connectors

 In modern substations, sensors are integrated into switchgears using either elbows with voltage sensors (such as RSTI-VS) or bushings. 

Smart elbows allow retrofits and sensor replacement, but require careful sensor selection due to the diversity of switchgears and elbow types. Smart bushings ensure compatibility, but hinder sensor replacement and escalate costs during component changes. An alternative approach integrates sensors directly onto transformers, offering independence from the type of switchgear and the type of elbows used within the switchgear. This is why we have introduced RSTS sensored connectors.

Our RSTS Sensored Separable Connectors with resistive voltage sensors were tested to HD 629.1 which ensures the compatibility of the complete system. The resistive voltage sensors, in conjunction with the new generation of intelligent electronic devices such as our Kries IKI-50 or IKI-55, provide measuring signals for grid management applications such as monitoring, metering and protection.

By using the appropriate monitoring devices, such as our Kries IKI-50 or IKI-55 which have patented ‘cross-calibration’ algorithm, the measured voltage signals on the transformer can be used to calibrate the capacitive voltage signals,  already available on each feeder of the switchgear. This provides a precise and stable measurement of voltage inside the switchgear, which saves cost by reducing the number of sensors needed in the switchgear or Ring Main Unit (RMU).