QST 300 power supply with data connection (2.2 kWt)

The QST 300 is a universal control panel for three-phase submersible pumps up to 2.2 kW, equipped with water level sensors. It ensures stable equipment operation, protects the electric motor from fault conditions, and is ideal for wells with an unstable water table.

The model is designed for systems where precise water level control, reliable protection, and correct pump shutdown during dangerous water drop are required.

Advantages of QST 300

▪️ Pump protection by water-level electrodes
▪️ Automatic and manual operation modes
▪️ Protection against overload, short circuit and dry-run
▪️ Visual indicators for normal and fault conditions
▪️ Self-extinguishing thermoplastic housing (IP55)
▪️ Ability to connect a float switch or pressure switch
▪️ Full compatibility with Pedrollo three-phase pumps

Configuration and design

The QST 300 control panel includes:

▪️ Fire-resistant housing with galvanized base
▪️ Three-pole contactor
▪️ Adjustable thermal overload relay
▪️ Water level sensors (electrodes)
▪️ Circuit fuses
▪️ Fault alarm indicator
▪️ Terminal block and connectors
▪️ Mode selector: MAN / AUTO / OFF

Main applications

▪️ Domestic water supply systems
▪️ Control of 4" submersible pumps
▪️ Irrigation and distribution pumping nodes
▪️ Wells with variable water levels
▪️ Commercial and industrial water installations
▪️ Municipal and agricultural facilities

Operating features

The QST 300 is ideal when:

▪️ level sensors must be connected;
▪️ there is a risk of dry-run;
▪️ the power grid voltage is unstable;
▪️ long service life of a three-phase pump is required;
▪️ the equipment operates with frequent starts and stops.