DSQC302  ABB  Servo Controller

The arc-fault protection sensor interface is available on the optional communication module. Fast tripping increases staff safety and security and limits material damage in an arc fault situation. A binary input and output module can be selected as an option - having three high speed binary outputs (HSO) it further decreases the total operate time with typically 4...6 ms compared to the normal power outputs.

REM615 constitutes main protection for asynchronous motors and the associated drives. Typically, the motor relay is used with circuit breaker or contactor controlled HV motors, and contactor controlled medium sized and large LV motors in a variety of drives, such as pumps and conveyors, crushers and choppers, mixers and agitators, fans and aerators.

The motor relay is thoroughly adapted for earth-fault protection. Using cable current transformers sensitive and reliable earthfault protection can be achieved. Phase current transformers in Holmgreen (summation) connection can also be used for earthfault protection. In that case possible unwanted operations of the earth-fault protection at motor start-up due to CT saturation can be prevented using the relay's internal interlocking features or a suitable stabilizing resistor in the common neutral return.

The optional RTD/mA module offered for standard configurations A and B facilitates the measurement of up to eight analog signals via the six RTD inputs or the two mA inputs using transducers. The RTD and mA inputs can be used for temperature monitoring of motor bearings and stator windings, thus expanding the functionality of the thermal overload protection and preventing premature aging of the motor. Furthermore, the RTD/mA inputs can be used for measuring the ambient cooling air temperature. The analog temperature values can, if required, be sent to other devices using analog horizontal GOOSE messaging. Temperature values can also be  received from other devices over the station bus, thus increasing the extent of relevant information.

The structure and details of the product：

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