Shiva Pharmachem Project Engineer Interview Questions and Answers

PLC starter is used to control the starting and stopping of motors through a programmable logic controller.

• PLC starter controls motor operation based on programmed logic

• It can include features like overload protection, soft start, and emergency stop

• Examples of PLC starters include Siemens Sirius 3RW30 and Allen-Bradley SMC Flex

VFD stands for Variable Frequency Drive, which controls the speed of an AC motor by varying the frequency and voltage of the power supplied to it.

• VFD converts fixed frequency AC power to variable frequency AC power

• It controls motor speed by adjusting the frequency of the power supplied

• VFDs can improve energy efficiency and reduce wear and tear on motors

• Example: A VFD can be used in HVAC systems to control the speed of