Explain how the 4 pole MCB is different from Triple pole and neutral?
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TPN= Thripple pole + neutral. Three (Triple) contacts make and break but neutral is closed contact.
Whereas 4P (3 phases +Neutral) all 4 contacts make and break together.
TPN means Triple Pole(TP)+ Neutral(N)which is 3 phases and neutral, but the protection is given for three phases only and in 4 pole MCB protection is given to all 3 phases as well as neutral. In the case of 4 pole MCB, the purpose is not to protect the neutral but it is rather to isolate the neutral.
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In three-phase electrical systems, a 4-pole MCB is utilized to properly separate and safeguard the neutral wire as well as the three live phase conductors. It eliminates floating neutral dangers, regulates unbalanced loads, and guarantees complete circuit shutdown in maintenance (or) faults.
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