ABB current measurement system

ABB's ultra-compact system for measuring circuits in distribution systems identifies power-hungry devices and manages loads at the final sub-circuit level.

The current measurement system (CMS) ensures a transparent overview of all power consumption, even in highly complex electronic systems. The system is designed to measure power flow right at the protective device of the circuit.

The compact current sensors are only 18 mm wide and mount directly onto the ABB System proM miniature circuit breakers or residual current devices. Up to 64 sensors can be connected to a single control unit via a ribbon cable. One button on the sensor, a touch screen and a cable harness has ensured a system with maximum simplicity.

CMS is highly expandable with its simple wiring via Modbus. The ability to have 64 sensors connected to one control unit makes it possible to easily expand the system to 247 control units on a single Modbus system. This could mean 15,808 measuring points on Modbus - more than enough for even highly complex electronic systems.

The sensors of the CMS provide high-level performance with the convenience of a compact design.

The CMS sensors can measure up to 80 A true RMS in AC or DC currents at accuracy levels of less than 0.5% AC. Each sensor is equipped with its own microprocessor and can transmit the readings securely via the bus interface to the control unit.