Direct On Line start is probably the simplest and traditional type of start and it is to connect the motor directly to the power supply performing therefore a full-voltage start-up.
It is often abbreviated with the acronym DOL.
DOL (Direct On Line) start is the simplest and most cost-effective system for starting pumps and motors and it is traditionally the most widely used. The induced current is the rotor is high. This results on a peak current on the network which can be 5 to 8 times the nominal current.
They are suitable for startup of small submersible pumps, deep well pumps or booster sets with surface pumps.
DOL control panels need a direct connection to the power supply network, which implies:
Control panel with LCD for 1 single-phase and three-phase motor with power factor control to prevent the pump from dry running. Ensuring the protection of submerged pumps without probes.
Scout Electronic Control panel is easy to use, intuitive and it’s a Wireless panel that transforms a standard pumping system into a smart system using yours smartphone for remote control via Wi-Fi.
Suitable for any applications, multi-user, LCD display and possibility to choose among 8 preset operation modes that simplify the use. The Express D control panels can control 1 to 4 pumps.
The back-up sump pumps systems HELP are anti black-out systems for single-phase loads. They are mainly used to control and supply sump pumps in black-out conditions.
In consideration of environmental relief and energy saving Franklin Electric E-tech developed a High Efficiency 6" Submersible Borehole System, consisting of a synchronous submersible NEMA motor associated variable frequency drive and output filter.
