ABB CURRENT SENSOR SEI601 MONITORING DEVICES NUMERICAL RELAY

ABB SEI601 CURRENT SENSOR : THIS TECHNOLOGY ALLOWS A UTILITY TO AUTOMATE ITS ELECTROMECHANICAL SUBSTATIONS WITHOUT THE HIGH COST OF A MICROPROCESSOR PANEL UPGRADE.

The sensor is a small, non-intrusive, clamp-on device that uses Hall Effect technology to sense current flow through a #12 AWG or #10 AWG wire. The chip is a single-axis, integrated, magnetic, field sensor based on the Hall Effect. The circuit is fabricated using a conventional CMOS technology, with an additional ferromagnetic layer.

The ferromagnetic layer is used as a magnetic flux concentrator, providing a high magnetic gain. Therefore, the circuit features very high magnetic sensitivity, a low offset, and low noise. The clip enclosure contains a small mu-metal strip for additional shielding against external fields and for amplifying internal fields. It is capable of sensing microsecond transients (AC & DC).

Application?
Acquiring communications and data in an electromechanical substation typically requires a utility to perform a wholesale upgrade of the entire panel to microprocessor relays, which can be very costly. The cost to upgrade a substation includes extensive engineering time, new relays and panels, complete rewiring of the substation, and in
some cases, additional real estate. ABB now offers a time and cost saving solution – Intelligent Data Sensor technology. This technology allows a utility to automate its electromechanical substations without the high cost of a microprocessor panel upgrade.

By simply attaching a small, non-intrusive, clamp-on AC/DC sensor to the relay wires and connecting its Cat5 cable to the supplied recording switch, real-time analog and digital information is readily available for analysis. The sensor is highly sensitive to a resolution of 10 microseconds and is capable of sensing millisecond transients with a
2% accuracy range. This clamp-on sensor, coupled with our waveform data analysis, is capable of fast line restoration, fault and disturbance analysis, and real time monitoring of evolving loads – all without the costs involved in upgrading to microprocessors.

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