（Mirco Circuit Breaker 就是MCB，空气开关或者微断啦；Moulded Case Circuit Breaker 就是MCCB，塑壳断路器. TPN： 为三相+N的断路器， T指THREE 英文三的缩写， P 表示火线， N 零线。 一般也写成3P+N.

2024年2月19日 · As the name specifies TPN - Tripple pole isolation & neutral link is direct (no isolation) where as 4 pole MCB has 4 pole isolation. What is the correct technical difference betweenTPN and 4-POLE MCB? Thanks in advance. Madhan.

2021年6月16日 · TP MCB is used in 3phase 4wire system. It is denoted as TP+N which will mean a three pole device with external neutral link which can be isolated if required. For the 4 pole breakers, protection...

TPN MCB: It is generally used where there are dual sources of incomer to the panel (utility source and emergency generator source). 4P MCB: It is used where is the possibility of high neutral current (due to unbalance loads and /or 3rd and multiple of 3rd harmonics current etc) and Neutral / Earth Protection is provided on Neutral.

MCB boards technical specifications Multipact MCB boards ASTA certified 微型斷路器配電箱技術參數 Multipact 微型斷路器配電箱 ASTA 認可 Technical Data: Power supply: 415V AC In compliance with standards: IEC60439-1 and BSEN 60439-1 Degree of protection: IP41 Surface mounting Galvanized 1.2mm steel sheet

2013年12月28日 · TP MCB is used in 3phase 4wire system. It is denoted as TP+N which will mean a three pole device with external neutral link which can be isolated if required. For the 4 pole breakers, protection applies to current flow through all poles. However when breaker trips or manually opened, all poles are disconnected.

2010年6月29日 · Good Answer: In 3 Pole MCCB, switching amp protection is effected in only three phases and the neutral is not part of the MCCB. In TPN MCCB, Neutral is part of the MCCB as a seperate pole but without any...

2020年7月6日 · TPN means a 4 Pole device with 4th Pole as Neutral. In TPN opening & closing will open & close the Neutral. For TPN, protection applies to the current flows through only 3 poles (Three Phase) only; there is no protection for the current flow through the neutral pole.

2021年9月22日 · TPN (3P+N) MCB: A TPN MCB has switching and protection for all three phases of the circuit, and Neutral is also included as a separate pole. 4 Pole MCB: A four-pole MCB is similar to a TPN, but it also has a neutral-pole protective release. MCBs are more current-sensitive than fuses.

MCB TPN C Curve As low as ₹ 1 258.00 (incl. of all taxes) MRP ₹ 2 164.00 42% Off Suitable for protection against overload & short circuit for high inrush current loads.