The CBI Hydraulic-Magnetic Principle – How it works

CBI's HY-MAG circuit breakers are what we call Hydraulic-Magnetic MCBs. For you as a user, this means that they always keep rated current within the temperature range -40ºC - + 85ºC, which gives design advantages if the application is exposed to fluctuating ambient temperatures. They are also more accurate in their tripping characteristic by always trip at their specified overload level, regardless of which temperature they have around them. The technology also make it possible to design a narrower module size which is a clear competitive advantage, especially in  distribution applications where you want to get many distribution points on a small area.

All the CBI HY-MAG is based on the same basic principle, but is manufactured in different models to suit different applications with varying requirements for installation, connectivity, rated current, voltage and auxiliary functions. The whole family consists of seven different basic designs or "Frames" covering rated currents from a few mA up to 1500A and voltages from a few volts up to 600V. All CBI Hydraulic-Magnetic circuit breakers are tested according to IEC to be used as a switch (10,000 operations). Most of them are also approved by IEC / EN / VDE (Europe), UL (US Continent) and CCC (China), which allows worldwide use, a feature which is particularly important for you who export your products to various parts of the world.


See Emcomp film about the CBI products and the HY-MAG technique

Principle of Operation  ----> (PDF opens in new tab)


SelectionChart_CBI_Emcomp.JPG                          standard_globe_B.JPG  

Selection Chart  ----> (PDF opens in new tab)                

Data sheet - DC products for both distribution and battery protection Standard range for quick supply ----> (PDF opens in new tab)