What is a pantograph switch?
Pantograph Disconnector Switch Components With a pantograph disconnector design, the equivalent current carrying live blade/arm is provided by a scissor-type arrangement consisting of four telescopic booms with moving contacts; the corresponding jaw is a stirrup-type fixture attached to the overhead line/bus.
What is pantograph isolator?
The Pantograph Disconnectors are single break and vertical reach type Disconnectors mounted on a post insulator operated through a operating rod insulator. The divided support Disconnectors are mounted directly on the structure.
What is MCB isolator?
The isolator is an isolation device used to disconnect the load from the main supply. MCB is a protection device used to protect electrical lines from the negative effects of excessive currents. MCB trips the circuit but open contact of MCB cannot be visible from outside.
What is double break isolator?
Double Break Type Isolator The rotation of the middle post insulator can be done by a lever method at the bottom of the post insulator, as well as it is related to manual operation (operating handle) or motorized operation motor (using motor) of the isolator via a mechanical knot rod.
Does pantograph touch the wire?
The pantograph is spring-loaded and pushes a contact shoe up against the underside of the contact wire to draw the current needed to run the train. The steel rails of the tracks act as the electrical return.
What is DP switch?
What is a double pole switch? Double pole switches are connected to two separate electric circuits. They essentially contain 2 switches which are linked together and can complete the circuit either simultaneously or staggered.
What does RCD stand for?
residual current device
An RCD, or residual current device, is a life-saving device which is designed to prevent you from getting a fatal electric shock if you touch something live, such as a bare wire. It can also provide some protection against electrical fires.
What is electric isolator?
isolator in Electrical Engineering An isolator is a device used for isolating a circuit or equipment from a source of power. An isolator is a mechanical switching device that, in the open position, allows for isolation of the input and output of a device.
What is a pantograph used for?
The pantograph is a common type of current collector. Typically, a single or double wire is used, with the return current running through the rails. The term stems from the resemblance of some styles to the mechanical pantographs used for copying handwriting and drawings.
What type of wire is used for pantograph?
Typically, a single or double wire is used, with the return current running through the rails. The term stems from the resemblance of some styles to the mechanical pantographs used for copying handwriting and drawings. Early (1895) flat pantograph on a Baltimore & Ohio Railroad electric locomotive.
Are there always two pantographs on an electric multiple unit?
There are not always two pantographs on an electric multiple unit, but in cases where there are the other one can be used if one is damaged; an example of this situation would be a British Rail Class 390.
How many pantographs are on a 3 phase power supply?
On some systems using three phase power supply, locomotives and power cars have two pantographs with the third-phase circuit provided by the running rails.