What is a 4-Point Starter?
The functional characteristics of a 4-point starter are like a 3-point starter. Four-point starter works as a current controlling device in the lack of back EMF while beginning the running of the DC motor. Additionally, a four-point starter works as a protective device. The primary distinction between a 4-point starter compared with a 3-point starter is, the holding coil is detached from the shunt-field circuit. The stud is then connected in series to the line’s current-limiting resistance (R). The contact points of the starter are called studs.
Four Point Starter
There are various types of manual starters accessible for DC motors specifically 2-point starters, 3-point starters, and 4-point starters. A measure of similarity exists between these starters. The three kinds of starters incorporate a switch specifically a face plate rotator through a related arrangement of the current limiting transistor. The primary and shared distinction among these initiating points lies in the absence of a voltage coil, commonly referred to as NVC (no voltage coil). In a 4-point starter, there is no voltage coil it is connected directly to the voltage supply. A starter isn’t required for a 6V or 12 V DC motor, and it tends to be run directly. External resistance, a no-volt release coil, and an overload release coil make up a DC motor starter. This article discusses the construction and working principle of a 4-point DC motor starter.
Table of Content
- What is a 4-Point Starter?
- Working Principle
- Construction and Operation
- Four-Point Starter
- Advantages and Disadvantages