Difference between contactors and relays
Contactors and relays are two closely related terms leading to confusions and misinterpretations most of the times. Both of them are electrically operated switches used for control and switching of…
Difference between Soft Starters and VFDs | Selection: Soft Starters v/s VFDs
Variable frequency drives and soft starters are widely used in industrial motor control and pump control. Both of them are semiconductor devices. VFD and soft starters although working on similar…
What is Comb Busbar?
Single phase Comb Busbar Comb busbar is one of the most basic switch gear instruments. The main purpose of a comb busbar is to distribute power to switch gear components…
What is ammeter selector switch?
Ammeter selector switch is basically a normal three position switch. In large Electrical distribution panels, an ammeter is used to monitor the current through each line. (more…)
Difference between volts and watts
Volts and watts are two of the most common and key terms in the field of Electrical and Electronics Engineering. Most of the times these terms confuse the newbie or those who have just started learning Electrical sciences. (more…)
Why are current transformers used in power system?
Why are current transformers used in power system? Protective relays coils and measuring instruments such as an ammeter, watt meter and energy meter are very sensitive devices and cannot be…
What are the basic requirements of a protection system used in a power network or equipment?
The following are the basic requirements of any power system protection system: ReliabilitySimplicitySelectivitySensitivitySpeed of operationEconomy Circuit breaker
What are the essential components of a protective relay?
What are the essential components of a protective relay? The essential components of a protective relay are the following: 1. Sensing element. 2. Comparison element. 3. Control element Related…