The isolator is an offload device that is used for isolating the downstream circuits from upstream circuits for the reason of any maintenance on downstream circuits. It is manually operated and does not contain any solenoid, unlike a circuit breaker. It should not be operated while it is having a load. First, the load on it must be made zero, and then it can safely operate. Its specification only rated current is given. But circuit breaker is on load automatic device used for breaking the circuit in case of abnormal conditions like a short circuit, overload, etc., it is having three specifications 1 is rated current and 2 is short circuit breaking capacity and 3 is instantaneous tripping current.
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...
-
WTI and OTI of Transformer The WTI means winding temperature Indicator and OTI means Oil Temperature Indicator which indicates the win...
-
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...
No comments:
Post a Comment