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[Jun20202p]

List the main differences between an AX. and a D.C. switchboard

 

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An AX (air circuit breaker) switchboard and a DC (direct current) switchboard have several key differences:

1. Power source: An AX switchboard is designed to operate on alternating current (AC) power, while a DC switchboard is designed to operate on direct current (DC) power.

2. Voltage: The voltage used in an AX switchboard is generally higher than that used in a DC switchboard. AX switchboards typically operate at 400V or 690V, while DC switchboards operate at voltages ranging from 24V to 220V.

3. Protection: AX switchboards typically have built-in protection devices such as overcurrent protection and short circuit protection, while DC switchboards may not require as much protection due to the lower voltage used.

4. Control: The control systems used in AX switchboards may be more complex than those used in DC switchboards, as they need to be able to handle and control higher voltages and current levels.

5. Applications: AX switchboards are commonly used in industrial applications, while DC switchboards are used in applications that require a constant and stable DC voltage supply, such as in telecommunications or transportation systems.

Overall, the main differences between AX and DC switchboards are the power source, voltage, protection, control, and applications in which they are used.

 

[Jun20202p]

What is the primary function of a circuit breaker?

 

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A circuit breaker is an electrical safety device that is designed to protect an electrical circuit and its components from damage caused by overload or short circuit. The primary function of a circuit breaker is to interrupt the flow of electrical current in a circuit when it becomes too high or when a fault occurs. This prevents damage to the wires, appliances and other electrical devices connected to the circuit, as well as reducing the risk of electrical fires. Circuit breakers are critical components in the electrical systems of homes, buildings, and industrial plants, and they play an important role in ensuring the safety and reliability of the electrical supply.

 

[Jun20202p]

What is the main difference between a relay and a contactor?

 

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Relays and contactors are both electrical switching devices used to control the flow of electrical power. However, there are a few key differences between the two:

1. Power capacity: Contactors are designed to handle high current and high voltage applications, while relays are typically used in low power applications.

2. Size: Contactors tend to be larger than relays due to their higher power capacity.

3. Number of poles: Contactors typically have more poles than relays, allowing them to control multiple circuits at once.

4. Duty cycle: Contactors are designed for continuous operation, while relays are typically used for intermittent operation.

5. Application: Contactors are commonly used in industrial applications, such as motor control, whereas relays are used in a wide variety of applications, including automotive, telecommunications, and home appliances.

Overall, the main difference between relays and contactors is their power capacity and size, which determines their suitability for different applications.