LVPCB vs ICCB

http://www.bing.com/search?q=+LBPCB+&src=IE-SearchBox&Form=IE8SRC

http://www.bing.com/search?q=ICCB&qs=n&sk=&sc=4-4&form=QBRE

Oh come on, this IS an Electrical Engineering forum for crying out loud, no need to be rude. MOST of us know that he meant Low Voltage Power Circuit Breaker (obvious typo when he repeated it in the body, but he got it right in the title) and Insulated Case Circuit Breaker.

"Both LVPCB and ICCB can be used in Switchboard, Switchgear and MCC. But when do I use LBPCB or ICCB? Is there any difference with regards to its applications?"

There is a big difference. An ICCB is typically a branch device or sometimes a main in another system such as a LV Switchboards, MCCs, even panelboards where the UL489 rules would apply but you need trip ratings higher than MCCBs will allow.

An LVPCB is a step above that. The breakers are tested under UL1066, ANSI C37.13 and NEMA SG-3. They are used in LV Switchgear, which is UL1558, ANSI C37.20 and NEMA SG-5. The main difference is that in Switchgear, it is expected that these will be primary distribution systems and thereby expected to be the LAST devices to trip in the event of a fault when you have a properly coordinated system. As such, they are DESIGNED to withstand the extra mechanical stresses that will be exerted on them as they wait for downstream devices to clear the fault. In other words they are the last line of defense, so they have to wait the longest under duress.

Incidentally, you can use a UL1066 listed LVPCB in a lower level system like Switchboards and MCCs, but you CANNOT use an ICCB in higher level Switchgear systems. So that part of your statement is incorrect. Common misconception, many people are never taught the differences between Switchgear and Switchboards and do not realize that they are not the same.

Hope that cleared it up for you.

Thanks Mr. JRaef it clears my understanding.