Types and methods of starting DoL / Star Delta motors. Starting a DoL / Star Delta motor begins with the operation of a water pump. It requires electrical power to make the motor work. As for the types and methods of starting the motor, there are 3 main types of starting the motor: Direct on-line (DOL), Star-Delta, and Soft Start. This is to reduce the occurrence of various problems that follow, such as Water Hammer. What causes Water Hammer in the pipe system and what method

What is Water Hammer? Water hammer is one of the household water-related terms that water users should be aware of to avoid it and know how to handle it. Water hammer is caused by the sudden shutdown of a pipe, causing a sudden change in pressure. A simple analogy is to imagine a person as water and a pipe as a path. If everyone were to walk along, there would be no problem. However, if an object suddenly blocks the path and causes a sudden stop, those walking together wo

Advantages and disadvantages of AC and DC power. Direct current (DC) is electricity that flows in only one direction, from the negative terminal of the power source, through electrical devices, and back to the positive terminal of the power source. Alternating current (AC) is electricity that flows in the reverse direction. That is, it has no polarity and constantly reverses direction.