Electrical Equipment Chapter 6

The UR 6 circuit breaker is designed to protect electrical equipment on DC lines by quickly interrupting short circuits and preventing damage.

The UR 6 circuit breaker is air-cooled, meaning it uses air to dissipate heat generated during operation.

The UR 6 circuit breaker is classified as a high-speed circuit breaker, meaning it can interrupt a short circuit very quickly. This helps to minimize damage to equipment.

The UR 6 circuit breaker is designed to limit the amount of current that flows through the circuit during a short circuit. This helps to prevent equipment from overheating and being damaged.

The UR 6 circuit breaker has been designed to ensure that its main contact opens quickly and reliably in the event of a short circuit.

The UR 6 circuit breaker uses an arc chute to extinguish the electric arc that occurs during a short circuit. This helps to prevent damage to the circuit breaker itself.

The UR 6 circuit breaker is composed of several independent sub-assemblies, each responsible for a specific function. This makes it easier to assemble and maintain.

The UR 6 circuit breaker is typically used in rolling stock (like trains) to protect the electrical systems used on DC lines.

The UR 6 circuit breaker has a rated operational voltage of 1800 V, meaning it can operate safely at this voltage level.

The UR 6 circuit breaker has a rated operational current of 1000 A, meaning it can handle up to this amount of current without being damaged.

The highest voltage the circuit breaker can withstand without breaking down. It is typically specified as a root-mean-square (RMS) value.

The highest voltage (in a very short impulse) the circuit breaker can withstand without breaking down. It's measured in kilovolts peak (kVp).

The current the circuit breaker can interrupt without causing damage. It indicates the maximum fault current it can handle.

The current the circuit breaker can pass without causing damage. It's the maximum amount of current it can safely conduct for a long time.

The time it takes for the circuit breaker to open when a fault occurs and interruption is required.

The time it takes for the circuit breaker to close when a circuit is required.

The amount of current the circuit breaker can handle for a short period of time (usually a few seconds).

The type of voltage used to control the circuit breaker, such as 110 volts DC.

The typical sequence of operation for the circuit breaker, indicating the number of times it can be opened and closed before needing maintenance.

A type of circuit breaker designed to break circuits carrying high AC current by creating a vacuum gap.

The switch connects two power supply units, usually a pantograph and an auxiliary source, to a traction vehicle.

This knife-like metal piece moves between the two power supply contacts, transferring power as needed.

These springs are connected to the power source and make contact with the moving knife.

A pneumatic cylinder provides the force to move the moving contact knife between the contact springs.

When the piston rod slides out, the moving knife connects to Contact C, which is the main power source, usually a pantograph.

When the piston rod slides in, the moving knife connects to Contact B, which is an alternative power source, like a battery.

This mechanism ensures the switch shifts between the two contact springs by rotating the moving knife 60 degrees.

The switch is designed to disconnect from one contact spring and engage with the other, changing the power supply.

These switches are connected to the moving knife shaft for auxiliary functions, such as controlling lights or brakes.

The switch connects to the traction vehicle's earthing system, ensuring electrical safety.

The maximum voltage that the circuit breaker can safely withstand during normal operation. This is important for preventing damage to the circuit breaker and ensuring safe operation.

The amount of current the circuit breaker can withstand for a very short time (1 second in this case). This is important for protecting the circuit breaker from damage during short circuits.

The maximum current that the circuit breaker can withstand during a fault condition. This is important for preventing damage to the electrical system.

The minimum amount of current that needs to flow through the circuit breaker for it to operate properly.

The pressure range at which the pneumatic drive operates. This is important for ensuring the proper functioning of the circuit breaker.

This refers to the voltage that is applied to the control circuit to test its insulation. This helps to ensure that there are no faults in the insulation of the control circuit.

The amount of time it takes for the circuit breaker to switch from one state to another (for example, from open to closed).

The nominal (average) voltage of the control circuit.

The permissible variation in the auxiliary voltage. This is important for ensuring that the circuit breaker operates correctly.

The UR 6 circuit breaker is composed of independent parts or assemblies, each responsible for a specific function. This design facilitates assembly, maintenance, and repair.

The UR 6 circuit breaker uses a specialized component called an arc chute to effectively extinguish the electric arc produced during a short circuit.

The UR 6 circuit breaker's primary function is to offer protection for the electrical equipment used in railway vehicles, commonly referred to as rolling stock.

The UR 6 circuit breaker is designed to limit the amount of current that flows through the circuit during a short circuit. This helps to prevent equipment from overheating and being damaged.

The highest voltage the circuit breaker can withstand without breaking down, ensuring electrical safety.