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Khaled Abuzaid
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Any idea how can we decide on the fault current time 1, 3 or 5 sec. for grounding cable sizing? Also, what is the related temperature to the selected timing?
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Required cross section of cable conductor in mm2 is :Khaled Abuzaid said:Any idea how can we decide on the fault current time 1, 3 or 5 sec. for grounding cable sizing? Also, what is the related temperature to the selected timing?
Fault current time refers to the duration of a fault current, which is an electrical current that occurs when there is a fault or short circuit in a power system. It is important because it helps to determine the magnitude and duration of the current, which can impact the safety and stability of the system.
Fault current time is typically measured in seconds, and there are different time intervals that are commonly used, such as 1, 3, or 5 seconds. These intervals are chosen based on the type of power system and the equipment being used.
The main difference is the duration of the fault current. A 1 second fault current time indicates a short duration fault, while a 5 second fault current time indicates a longer duration fault. The duration can impact the amount of damage to the system and the safety of the equipment and personnel.
Circuit breakers are designed to trip or open when a fault current occurs. The fault current time can impact the performance of the circuit breaker, as a longer duration fault may cause more damage and make it more difficult for the circuit breaker to interrupt the current.
Yes, there are various methods that can be used to reduce or control fault current time, such as using protective relays, fuses, and circuit breakers. These devices can detect and interrupt the fault current, minimizing its duration and potential damage to the system.