what is the difference between miniature circuit breaker and fuse
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elcb is the daughter of ELR ,mcb is their one onlyn son
TPN is same as 4P MCB TPN means Three Pole and Neutral - four pole MCB. 4P is four pole MCB
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Basically tpn means the tripple pole + nutral protectin mbc .
MCB (Miniature Circuit Breaker)-rated current not more than 100 A. Trip characteristics normally not adjustable. Thermal or thermal-magnetic operation. Breakers illustrated above are in this category.MCCB (Molded Case Circuit Breaker)-rated current up to 2500 A. Thermal or thermal-magnetic operation. Trip current may be adjustable in larger ratings. MCB (Miniature Circuit Breaker)-rated current not more than 100 A. Trip characteristics normally not adjustable. Thermal or thermal-magnetic operation. Breakers illustrated above are in this category.MCCB (Molded Case Circuit Breaker)-rated current up to 2500 A. Thermal or thermal-magnetic operation. Trip current may be adjustable in larger ratings.from Manu anand