MP 1, SQE-NE, SPA-NE, SP-NE - SCL Water

AccessoriesSubmersible pumpsSP EnvironmentalControl functionsThis table describes the protection provided by the MP 204.Control parameters Function Problem AdvantagesTemperatureMSThe motor temperature is measured bymeans of the built-in Tempcon temperaturetransmitter and a signal is sent to theMP 204 via the phase leads. In the MP 204,the measured temperature is compared withthe factory-set value (75 °C).MMSThe motor temperature is measured bymeans of the Pt100. The signal is sent to theMP 204 where the measured temperature iscompared with the factory-set value.Temperature protection requires asubmersible motor with a Pt100.Overload, frequent starts/stops, operation againstblocked discharge pipe,insufficient flow velocitypast the motor.Longer motor life,safe operatingconditions, serviceindication.Overvoltage/undervoltageOverloadUnderload(dry running)Current unbalancePhase sequencePhase failureThe motor temperature must be monitoredduring frequency converter operation.If the set trip value is exceeded, the motorwill stop.The motor power input is measured on eachof the three phases. The registered powerinput is an average of these three values. Ifthe factory-set value is exceeded, the motorwill stop.The motor power input is measured on eachof the three phases. The registered powerinput is an average of these three values. Ifthe average value is lower than the factorysetvalue, the motor will stop.The power input of the motor is measured oneach of the three phases.The MP 204 and motor are installed so thatthe phase sequence corresponds to correctdirection of rotation. MP 204 monitorschanges in the phase sequence.The MP 204 checks the phases connected,phase failure will cause an alarm.The installation is close toa transformer. The mainsdo not absorb loadvariations.Incorrect sizing of pump/motor, voltage supplyfailure, defective cable,blocking, wear orcorrosion.Pump exposed to dryrunning or underload, forexample caused by wear.Mains load is uneven,incipient motor defect,phase voltages diverging.Two phases are wronglyconnected.Phase failure.Important installationparameter,possibility ofimproving operatingconditions.Longer pump life,safe operatingconditions, serviceindication.Conventional dryrunningprotection isno longer necessary,no extra cables.Motor protectionagainst overload,service indication.Ensures correctpump performance.Indication of phasefailure, and alarm.62