ABB 3HAC17346-1/01 Motor M24 Type B

REM620 is a dedicated motor IED perfectly aligned for the protection, control, measurement 

and supervision of medium-size and large asynchronous motors, requiring also differential protection, 

in the manufacturing and process industry. 

REM620 is a member of ABB’s Relion® protection and control product family and its 620 series. 

The 620 series IEDs are characterized by their functional scalability and withdrawable-unit design. 

The 620 series has been designed to unleash the full potential of the IEC 61850 standard for 

communication and interoperability of substation automation devices.

Disturbance recorder function

The three conductor currents, the current in the directly earthed conductor,

binary signals, and the voltages, can be recorded in each BU. 

Recording can be started, for example, by a protection function or an input signal. 

The disturbance recorder data are stored in the REB 500. 

They can be read out directly on the BU or at the central unit in COMTRADE format and stored on the PC. 

An evaluation program (eg, WINEVE) is used for further processing.

REF542plus Multifunction Protection and Switchbay Control Unit integrates all the secondary functions in a single unit. 

This multifunctional unit also features a selfmonitoring function. 

All functions are designed as freely configurable software modules. 

Therefore, a wide range of operation requirements in MV stations can be met without any problems. 

The versatility of the software makes it possible to use the REF542plus on every 

switchboard independent on the specific application required.

Overcurrent-time protection

This is a back-up protection function which is calculated locally in the BU and used to provide simple,

autonomous feeder protection in each BU.

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