Grundfos Motor Control Box SA-CSIR 0.55kW

The Grundfos SA-CSIR 0.55kW control box, product number 98582277, is designed for compatible Grundfos MS402 three-wire, single-phase submersible motors rated at 0.55kW. Motor type, voltage and starting arrangement must be confirmed before installation. It should not be used with three-phase motors or incompatible single-phase motor designs.

The Grundfos SA-CSIR 0.55kW is designed for a single-phase 200–240V AC supply at 50Hz. The supply voltage must remain within the limits specified for the connected motor and control equipment. Electrical connections and protective devices should be installed in accordance with Grundfos instructions and applicable wiring regulations.

SA-CSIR stands for capacitor-start, induction-run, while SA-CSCR stands for capacitor-start, capacitor-run. CSIR uses a starting capacitor that is disconnected once the motor starts. CSCR uses separate starting and running capacitors. The correct control box depends on the motor's electrical design and must not be selected solely by matching motor power.

Grundfos SA_CSIR Control Box includes a 100 µF starting capacitor, replacement capacitors must meet the manufacturer's electrical specifications. A capacitor intended for a different motor size or starting arrangement should not be substituted.

The SA-CSIR 0.55kW is identified by SCL Water as the replacement designation for the earlier Grundfos SA-SPM7. Before replacing an existing unit, confirm the connected motor rating, supply voltage, wiring arrangement and original control box specification.

The SA-CSIR control box incorporates overload protection associated with the motor starting circuit. However, suitable circuit protection, earthing and any additional application-specific protection must still be provided. Dry-running protection should be considered separately where required, the starting control box does not provide water-level monitoring.

The Grundfos SA-CSIR 0.55kW enclosure measures 213mm high, 124mm wide and 70mm deep. Installation should allow adequate access for electrical connections, inspection and maintenance while complying with the manufacturer's mounting and environmental requirements.

The SA-CSIR range is supplied in an IP55-rated steel enclosure, but installation conditions must still comply with Grundfos instructions. Where the unit is exposed to rain, direct sunlight or harsh environmental conditions, additional weather protection may be necessary. The control box must not be installed where flooding or water ingress could compromise electrical safety.

Compatible three-wire, single-phase Grundfos submersible motors require an external starting arrangement to develop sufficient starting torque. The SA-CSIR control box contains the components needed to connect the starting capacitor during motor start-up and disconnect it once the motor is running. The correct box must be matched to the motor's rating and electrical configuration.

Check the existing control box product number, Grundfos motor model, rated motor power, supply voltage and starting arrangement. The SA-CSIR 0.55kW is intended for compatible 0.55kW Grundfos MS402 three-wire single-phase motors. If the motor nameplate or existing control box details are unclear, SCL Water can help confirm compatibility before ordering.