Would you believe a circuit breaker does not always trip at the same tripping point! There are various reasons a circuit breaker tripping point deviates…one is temperature. Well for some more then others – the thermal-based ones have big deviation, it even gets affected by the neighbors.(grouping) as well as the frequency of the supply. […]
What to make of the two kA ratings one find on MCB (Miniature Circuit Breakers) Why is there 6 and 10kA for same circuit breaker?(sales) The famous question that causes much confusion: The BS 60898 and IEC 60947 for Euro and African countries. The same breaker but two different kA ratings …come on! Why, why, […]
Tags: protection
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It is Saturday night and you are having a grand party…the powerful sound system is tuning out the music…pulling heavy amps. There comes the drunk uncle…he trips over the self-made extension cord and there the lights go out…
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We all know the circuit breaker is rated according to the load it protects, right! I have a rude awaking for you… ===>>>OOPS…You are not logged in for this group!
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It is a test button to confirm the operation of the earth leakage… “Duhuh (or something that sounds like that)” he says…I can see that…it is written on the unit…I ask what does it do. Does it push a lever inside and trip the unit mechanically or does it test it electrically as well…what does it […]
Tags: earthleakage, protection, RCD
When we have an electrical storm the earth leakage trips and in my assessments it always does when some serious lightning energy is behind it.
Tags: earth leakage, GFPD, RCD