Just touch this area, a lot of places do not understandFor example, I have a water pump, for 11kw, choose circuit breaker, then what model should be chosen more appropriate, it is best to recommend a Schneider, universal DW recommend oneCan explain in detail, better, I checked online selection manual, there are many places that feel fuzzyIn addition, 37KW, 22KW, 1.5KW each choose what type?Hope predecessors give advice
Schneider circuit breaker is not selected, I do not know how much current to drive the 11kw pump, and there is no other load?
Tell you a way, then go to the election, mainly to see his rated current to choose.The most general calculation of a KW==2 current (380V3 phase) 11KW==22 current, and then enlarge 1.2 times, that is, the current of the circuit breaker is selected to 25-30A. If it is started directly, zoom in to 1.5 times. Yes, no problem!! In addition, the 37KW 64 current short circuit selector 80-100A is ok.. Similarly, 4KW following unification can be done using 10A15A
If it is a single-phase motor, rated current is 75A; three is about 30A; the contactor should be 1.1-1.5 times the rated current of the motor protection type selection of circuit breaker, circuit breaker: RMM1-100/33002 or 50A motor comprehensive protector, the price is not expensive.The circuit breaker (English Name: circuit-breaker circuit, breaker) refers to the closing, carrying and breaking current conditions and normal circuit switch device, load and breaking current loop abnormal conditions within the stipulated time. The circuit breaker is divided into high voltage circuit breaker and low voltage circuit breaker according to its range of use. The demarcation line of high and low voltage is fuzzy. Generally, more than 3kV is called high-voltage equipment.The circuit breaker can be used to distribute electricity, not frequently start asynchronous motors, the protection of the power line and a motor, can automatically cut off the circuit when they occur serious overload or short circuit and under voltage fault combination, its function is equivalent to the fuse switch and less thermal relay etc.. Moreover, after breaking the fault current, there is no need to change the components. At present, it has been widely used.Distribution is an extremely important link in the generation, transportation and use of electricity. Distribution systems include transformers and various high and low voltage electrical equipment. Low-voltage circuit breakers are a wide range of electrical equipment.
