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fannypf
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hi..i want to know if anyone of you can confirm of BS 142:1966 for relay coordination time is 0.4s? thx
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fannypf said:hi..i want to know if anyone of you can confirm of BS 142:1966 for relay coordination time is 0.4s? thx
fannypf said:hi...nope..i don't hv d copy..i've been looking in d i'net...but..i need to verify if BS142:1966 states that the grading time from relay to relay is o.4s..
thx
Relay coordination time refers to the amount of time it takes for protective relays to respond to a fault or abnormal condition in an electrical system. It is an important factor in ensuring the reliability and safety of the system.
Relay coordination time is important because it helps prevent damage to equipment and disruption of service in an electrical system. By coordinating the response of different relays, faults can be isolated and cleared more efficiently, minimizing downtime and potential hazards.
BS 142:1966 Confirmed is a British Standard that provides guidelines for the coordination of protective relays in electrical systems. It outlines the recommended settings and time delays for different types of relays to ensure effective coordination.
The relay coordination time is determined through a process called time-current coordination. This involves analyzing the time-current curves of different protective relays to ensure that the relay closest to the fault will operate first, followed by the next closest relay, and so on until the fault is isolated and cleared.
There are several factors that can affect relay coordination time, including the type and settings of the protective relays, the size and complexity of the electrical system, and the type and location of the fault. Changes in any of these factors may require adjustments to the coordination time to maintain the reliability and safety of the system.