Appearance of plastic shell circuit breaker

There are many types of circuit breaker, usually we contact more of the number of plastic shell circuit breaker, let’s first through a picture to see what the real body of the plastic shell circuit breaker is like:

Appearance of plastic shell circuit breaker

Although the shape of different brands of plastic shell circuit breakers is different, but they are much the same, basically similar to the picture.As for the model of plastic shell circuit breaker, the models of different brands are very different. Here we take a first-line brand as an example to introduce the model of plastic shell circuit breaker.

Compact NSX 100 N MIC2.2 40 F FC Attachment + COM4

The names of each section are explained as follows:

The Compact NSX —— represents the type series of the product

100 —— represents the frame current specification of the shell circuit breaker in 100 / 160 / 250 / 400 / 630 gears

N —— represents the segmentation capacity of the plastic shell circuit breaker, including F, N, H, S, L and R, corresponding to 36kA, 50kA, 70kA, 100kA, 150kA and 200kA, respectively

MIC2.2 —— represents the buckle type of plastic shell circuit breaker, including hot magnetic buckle TM and electronic buckle MIC

The 40 —— represents the rated working current of the plastic shell circuit breaker

—— represents the number of poles (not marked), 4P

F —— represents the installation mode of the plastic shell circuit breaker, F: fixed type (not marked), P: insert type, D: extraction type

FC —— represents the connection mode of the plastic shell circuit breaker, FC: plate front mode (not marked), RC: board back connection

Annex —— represents the attachment type of plastic shell circuit breaker belt, MX / MN excitation / pressure loss coil, OF / SD / SDE / SDV multi-function auxiliary switch, MT electric operating mechanism, ME / MB / MH leakage protection module, ERH / RH FDM door display unit, SDx fault classification indication attachment, leakage module (EL buckle, ELA only alarm not buckle), IFE1 intelligent * *, I / O input / output module

COM4 —— measurement and communication scheme

For example below, now I want to choose a 3-pole outlet switch, rated voltage 380, maximum working current 210A, calculate the short circuit current 20kA, fixed type, front panel wiring, so the feasible model is: NSX250F MIC2.2 250 FFC.