It depends upon R=rho l/a where area(a) is inversely proportional to resistance(R), so if (a) increases, R decreases & if R is less the leakage current will take low resistance path so the earth pin should be thicker. It is longer because the First to make the connection and last to disconnect should be earth Pin. This assures Safety for the person who uses the electrical instrument.
Subscribe to:
Post Comments (Atom)
-
Transmission substation transmission substation connects two or more transmission lines Distribution substation distributi... -
Over-current / Earth fault relays are the basic protection relays. Used for protection of transformers and feeders from over current and ...
-
Electric Current Electric current definition and calculations. Electric current definition Electric current calculatio...
-
Advance - EFFR wire has enhanced flexibility* & higher bending capacity (15% to 20% more bending radius than other wires) comes with uni... -
Series motor cannot be started without load because of high starting torque. Series motor is used in Trains, Crane, etc.
-
7.1Transactor 7.2Hedgehog 7.3Variometer and variocoupler 7.4Rotary transformer 7.5Variable differential transformer 7.6Resolver and synchro...
-
Joule’s Law of Electric Heating The amount of work required to maintain a current of I amperes through a resistance of R ohm for t second ... -
substation which is used for all voltage levels between 55 KV to 765 KV is called outdoor substation. ... The outdoor substations are mainly...
-
synchronous machines have the capability to work on different power factor (or say different imaginary POW varying the field emf. Hence sy...
-
Pressure relief devices are used to provide a means of venting excess pressure which could rupture a boiler or pressure vessel. A pressu...
No comments:
Post a Comment