What is dol starter. The 3 phase dol starter wiring diagram is shown below.
Dol Starter Direct Online Starter Diagram Amp Working
Direct online motor starter diagram. Direct on line starter direct on line starter method is a common method of starting of cage induction motor. Generally the direct online starter working can be done in two different stages namely dol starter control circuit and dol starter power circuit. Direct on line starter is the simplest kind of starter that connects the motor directly to the power supply through a three phase contactor. Different starting methods are employed for starting induction motors because induction motor draws more starting current during starting. The direct on line starter method figure is shown below. A dol starter is a direct on line motor starter.
The dol starter basically consists of two main protection parts. The direct on line starter usually consists of a contactor circuit breaker and an overload relay for protection against any damage. Direct online motor starter square d. To prevent damage to the windings due to the high starting current flow we employ different types of starters. The dol starter joints the 3 phase main wiring with the induction motor namely l1 l2 and l3 when the start switch is pressed. Direct on line starter.
It consists a coil operated contactor c controlled by start and stop push button as shown in the connection diagram below. Schematic and circuit diagram. In this article we will discuss dol starter direct online starter working principle and construction dol starter diagram control diagram power circuit and wiring single 3 phase starter direct on line is the simplest and cheapest method used for starting three phase motor. A dol starter or direct on line starter or across the line starter is a method of starting of a 3 phase induction motorin dol starter an induction motor is connected directly across its 3 phase supply and the dol starter applies the full line voltage to the motor terminals. Three phase motor control and design power circuit and installation. The direct online or dol starter employs full voltage or across the line starting technique where the motor is directly connected to full voltage through mccb or circuit breaker and relays for overload protection.
In this post we are going to know the details of each part of dol starter diagramall parts of the dol starter power circuit diagram and control circuit diagram are explaineddirect online starter or dol starter is very useful and commonly used ac starterdol starters are mainly used with up to 5 hp motors. Sometimes known as an across the line starter this type of motor controller is used as a simple starter for larger electric motors providing. Three phase and single phase. Despite this direct connection no harm is done to the motor. The motor is connected through a starter across the full supply voltage. This is why such a starter is used with induction motors rated below 5 hp.
Gallery of Direct Online Motor Starter Diagram
