Circuit Elements and Types of Circuits
A circuit element is an idealised mathematical model of a two-terminal electrical device that is completely characterised by its voltage-current relationship. Although ideal circuit elements are not “off-the-shelf” circuit components,…
What is a PLC? – Programmable Logic Controller
A Programmable Logic Controller, also called a PLC or programmable controller, is a computer-type device used to control equipment in an industrial facility.
Digital Building Blocks – GATES
GATES are DIGITAL BUILDING BLOCKS. They are called DIGITAL because they operate on digital principles. They require a signal (also called a PULSE or INPUT) that is either 0v (LOW)…
Transformer Open and Short Circuit Tests
We conduct open circuit and short circuit test on single phase transformer to determine the efficiency and regulation of a transformer on any load condition and at any power factor.Open…
Electrical Machines Questions and Answers
Lap winding is suitable for high current and low voltage generators while wave winding is suitable for high voltage and low current generators. >Lap winding is suitable for high current…
Induction Motor Interview Questions Answers
What are the advantages and disadvantages of Induction Motors? Advantages: It is simple and rugged in construction It is relatively cheap Induction motors require less maintenance Induction motor has high…
Deluge Valve Operation
A Deluge system (automatic High Velocity Water Spray System) is a fixed fire protection system, which totally floods an area with pressurized water through a system of piping with open…
S84 / IEC 61511 Standard for Safety Instrumented Systems
IEC 61511 is a technical standard which sets out practices in the engineering of systems that ensure the safety of an industrial process through the use of instrumentation. Such systems…
Fire Water Sprinklers Working Principle
Automatic Sprinklers Automatic sprinklers are thermosensitive devices designed to react at predetermined temperatures by automatically releasing a stream of water and distributing it in specified patterns and quantities over designated…
Fire Water Spray Systems Principle
A Water Spray System, for Fire Protection a different variant of Fire Sprinkler System. Such a system is used in places where fire is likely to rapidly spread out of…
