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.
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:
| Model | Supply Voltage | RATING | CURRENT(A) | WEIGHT(KG) | ENCLOSURE DIMENSION (MM) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| HP | KW | MIN | MAX | NET | GROSS | H | L | W | ||
| LEDB-14 | 440 | 0.25 | 0.186 | 0.6 | 1 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-18 | 440 | 0.5 | 0.37 | 1 | 1.6 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-26 | 440 | 1 | 0.75 | 1.5 | 2.5 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-30 | 440 | 2 | 1.4914 | 2.5 | 4 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-38 | 440 | 4 | 2.983 | 4 | 6.5 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-42 | 440 | 6 | 4.474 | 6 | 10 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-54 | 440 | 7.5 | 5.5 | 9 | 14 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-60 | 440 | 7.5 | 5.5 | 11 | 18 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-70 | 440 | 7.5 | 5.5 | 13 | 21 | 1.800 | 1.900 | 210 | 130 | 115 |
| LEDB-90 | 440 | 10 | 7.457 | 20 | 32 | 2.400 | 2.550 | 260 | 150 | 110 |
| LEDB-90H | 440 | 10 | 7.457 | 20 | 32 | 2.200 | 2.350 | 245 | 150 | 115 |
| LEDB-100 | 440 | 15 | 11.1855 | 28 | 42 | 2.200 | 2.350 | 245 | 150 | 115 |
| BOM | ||
|---|---|---|
| Description | Specification | QTY |
| MCB/MCCB | For Isolation with Protection of power & Control gear | 1 |
| Contactor | For Switching an electrical power On or Off | 1 |
| Analog Ammeter | For Current Indicator | 1 |
| Analog Voltmeter | For Voltage Indicator | 1 |
| Starting Capacitor | To give a motor an extra electrical push to start it turning | 1 |
| Running Capacitor | To provides the extra power to run the motor for long periods of time | 1 |
| Power And Control Wiring | For carrying current | 1 |
| Terminals | For easy termination and maintenance | 1 |
| Indicating Lamp | To indicate Power ON / failure or incorrect phase sequence | 2 |
| Push Button | To start/stop motor | 2 |
| Enclosure | A cabinet for electrical or electronic equipment to mount switches, knobs and displays and to prevent electrical shock to equipment users and protect the contents from the environment. | 1 |
