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what is the difference between single voltage rated MCB and dual voltage rated MCB?

can anyone explain meaning of these Icu and Ics values? what is the meaning of that Ics=100% of Icu? how Icu and Ics differs for different voltages? why Icu and Ics values defined for single phase voltages as well even though MCCB is a multi pole device which will always get voltage over 400V?

what is the cable type that i use for connecting antenna and a Terrestrial television or broadcast television(analog)? there are 3C-2V, 5C-2V, RG 59 and RG 6 cable types. what type of cable should i use?

how to choose a MCB from 3kA, 4.5kA MCB, 6kA MCB and 10kA MCB for domestic application? i have seen 10kA MCB are used for industrial applications. but why industrial applications need 10kA MCB instead of 3kA, 4.5kA MCB, 6kA MCB what is the thumb rule of selecting short circuit capacity of a MCB.

what is the best rivet type to be used for 10kA(short circuit capacity) MCB rivets? can Al rivets withstand higher kA rating or is it Cu rivets?

hello, can anyone tell me most probable reason for this kind of RCCB(4P, 400V, 63A, 100mA, 3kA) burn out. there was isolator in the system before this RCCB. can this happen due to a lightening strike? then why isolator didnt burn out first?

is it required to issue declaration of conformity for motor control panels we manufacture when we export them to EU countries? if yes, what requirements do we have to fulfill for issuing DoC? is CE marking is applicable for motor control panels? is there any other EU directives that we have...

for what purpose we use MCCB shunt devices?

i have faced a issue of copper cable blackening after few months of productions. what are possible causes for copper cable blackening? how can we prevent this issue during copper cable manufacturing?

can someone explain how circuit Breaker Arc Chutes help to extinguish arcs during on and off operations?

could you pls let me know how to select accuracy class value and burden for a particular application of CT of 400/5? i have 2 CTs of 400/5. one is accuracy class of 0.5 and another one with accuracy class 1. and i can choose of the burdens from 1.5, 2.5 and 5VA for any CT. how can i select...

hi, pls can you tell me if we want to get type tested our enclosures for IP 54 rating, do we have to test them after all internal wiring and done or before internal wiring and closing all wire wholes.