M E Energy Principal Engineer Interview Questions and Answers

The contact resistance of VCB is typically very low.

• VCB stands for Vacuum Circuit Breaker.

• The contact resistance is the resistance between the contacts of the breaker when it is closed.

• The contact resistance of VCB is typically in the range of micro-ohms.

• Low contact resistance is important for efficient operation of the breaker.

• High contact resistance can cause overheating and damage to the breaker.

• The contact resistan...read more

The resistance value of tripping & closing coil of VCB varies depending on the manufacturer and model.

• The resistance value can be found in the manufacturer's manual or datasheet.

• It is important to use the correct resistance value to ensure proper functioning of the VCB.

• The resistance value may also vary depending on the voltage rating of the VCB.

• For example, the ABB VD4 VCB has a tripping coil resistance of 50-60 ohms

The minimum height at which the safety belt should be used is determined by the height of the individual and the specific safety regulations in place.

• The minimum height requirement for safety belt usage varies depending on the country and jurisdiction.

• In the United States, for example, the minimum height for safety belt usage is typically around 4 feet 9 inches (145 cm).

• Other factors such as age, weight, and type of ve...read more