KB0 control protection switch and the breaker difference, national electrical switch factory, www.jiandq.com
The separation of electrical system compared with
A. With control and protection from the characteristics of KBO series control and protective switching devices with control and protection functions, equivalent to the broken road device ( fuse ) + + + auxiliary electrical overload relay contactor. Very good solution to the separation element cannot or difficult to solve element between the protection and control characteristics matching problem, so that the protection and control characteristics with more perfect and reasonable ( with inverse time limit, and the instantaneous protection characteristic of three segments ), as long as the load power or current can be properly selected a single product, instead of including self power incoming line end to the load end of various electrical appliances, without lowering the capacity; greatly reduces the workload of design.
There is nothing comparable to this B. With the operation reliability and continuous system operation performance of KBO in breaking short circuit current without maintenance can be put into use, that is breaking short circuit faults of continuous running performance: KBO was breaking short-circuit current after the test, is not less than 1500 AC-44 electric service life, which is composed of circuit breakers and other separation components of the system is difficult to achieve, this KBO feature of the system is greatly improved the reliability of operation and continuous operation of the system, the Ics 80kA index is similar products in the leading international, domestic highest index.
C. Energy saving KBO has the advantages of small volume, small installation area, without a separate component contacts, reduce line heating, energy saving, material saving etc..
The compared with molded case circuit breaker
A. With high breaking capacity, arcing distance short of the characteristics of KBO in 380V rated short-circuit breaking capacity ( Ics Oco-co ) reached high breaking type 80kA, type 50kA, type of economic standard for 35kA, 50kA expected in short circuit current breaking time is 2 ~ 3MS, limiting factor at 0.2 the following, reaching the leading level of molded case circuit breakers, reach the limiting current of fuse level, greatly limiting the short-circuit current of the system dynamic,
Thermal shock. KBO arcing distance of only 20 ~ 30mm.
B. And molded case circuit breaker. Compared with protection system, protection setting current adjustable thermal trip characteristics of KBO ( inverse ) current and magnetic trip ( constant time ) current can be adjusted in the panel, which in addition to the conventional thermal protection under the current load power setting, overcurrent protection setting current can be adjusted in the panel ( distribution load adjustment range is 3 ~ 6Ie, motor load adjustment range of 6 ~ 12Ie ). To overcome the molded case circuit breaker with short circuit protection setting current manufactured after the user can adjust the shortcomings, making KBO products even mounted at the ends of the line, short-circuit current is small, but also has a very good short circuit protection function. The performance is compared with the contactor has the advantages of long service life, convenient operation characteristics
KBO mechanical life of 500 ~ 10000000 times, the electrical life of AC-43 is 100 ~ 1200000 times, can be manually operated, but also can realize the automatic remote control function. Using advanced contact and electromagnetic system separation design, effective suppression of contact bounce two times, greatly improving the product life, and is especially suitable for heavy load starting the harsh situation