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When an induction motor starts up, it uses a significant quantity of electricity. The motor windings may sustain damage from this beginning current.
Using a motor starter, we employ a variety of strategies to lower the starting current in order to prevent any harm. These methods rely on the motor ratings and the load that is attached to the motor.
Additionally, the motor starter guards against overloading and overcurrent on the motor. The Direct Online (DOL) starter uses a full voltage or across-the-line starting method in which the motor is directly linked to full voltage via an MCCB (circuit breaker) or circuit breaker and relays for overload safety.
Due to this, induction motors with horsepower ratings under 5 hp require a starter like this.“Across-the line starter” is another name for Direct Online Motor Starter.
A DOL starter is a tool used to start motors that consist of the main contactor, safety features, and an overload relay. It is used for low-rating motors, often those with less than 5 HP.
The motor stator windings are directly connected to the main supply in the direct online starter method of starting the motor, and the DOL safeguards the motor circuit from high inrush current that may harm the entire circuit as the initial current is significantly higher than the full rated current.
The motor starters not only supply a safe starting current but also safeguard the motor while it is running.
Although it is obvious that the DOL starter supplies the entire line voltage, it also offers the following protection: Overcurrent refers to the situation where a large amount of defective current flows, typically as a result of a short circuit or ground fault.
The overcurrent condition might endanger the safety of the operators as well as harm the motor and electrical lines. For a split second, such a high current is too risky.
The term “overload condition” refers to the situation in which the load linked to the motor increases past its limit and draws an excessive quantity of electricity.
Overload causes the current flow to exceed acceptable limits, damaging the motor windings and the wires. The windings melt, and potential fire concerns result.
The Global Direct Online Motor Starter market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Can increase the effectiveness of your installation by using the DRAF enclosed direct online motor starter.
ABB introduced the DRAF starter, which integrated dependable AF technology. AF contactors’ electronically controlled coil has many advantages over traditional options.
The DRAF is an enclosed direct-on-line starter with 7.5 kW (400 V) and 10 hp of 3-phase motor control (440 V). Both the IEC and UL markets can purchase the starter.
DRAF is frequently used to control independent motors, such as those in heat pumps, air conditioners, small machine tools, irrigation systems, and storage sheds.
