Rated current(n):1,23,4,5,6,8,10,13,16,20,25,32,40,50,63
Number of poles:1,2,3,4
Rated operating voltage (Ue):230/400V~
Rated frequency:50/60Hz
Insulation voltaqe(Ui):500
Rated withstand impulse voltage (Uimp):6
Main circuit dielectric strength (1 min power-frequency withstand voltage test) :2
Protection degree:IP20
Instantaneous tripping type:B C D (According to GB10963.1 IEC/EN60898-1)
Instantaneous tripping type:K (According to GB14048.2 IEC/EN60947-2)
Electric life:6000
circuit breaker enclosure Electromagnetic tripping mechanism: overload and short circuit protection, and correct display Rapid arc extinguishing system: quickly extinguish arc, avoid electrical fire.Advanced contact line pressing firm, palpable closing and tripping indication function, shape upgrade feel more comfortable.
circuit breaker enclosure Have to prevent electricity safety electricity priority, short circuit hidden trouble electrical equipment aging, insulation damage caused by short circuit is the hidden killer of home safety.Electrical overload carrying induction cookers, electric ovens, air conditioners, water heaters and other high-power electrical appliances increased the load of the line.Leakage danger plug The electrical equipment used for a long time, aging, ash, damp, insulation layer damage caused by leakage, threatening the safety of life and property.Lightning hazards The residual voltage and induced glow caused by lightning will not affect electrical equipment, which will cause electrical short circuit, causing combustion, explosion and other risks.
The correctness of the position of the stopper is also closely related to the normal operation of the Circuit Breaker Enclosure. The stopper on the guide rail can be adjusted when we find that its position is incorrect to avoid more serious things. The stopper is used to withstand the outside of the half shaft. This is to prevent the half shaft and the jumper from being buckled, thereby avoiding many failures.
The failure of the pressure-loss release is also prone to failure. If it is not in the correct pull-in position, its metal sheet will let the tripping mechanism act under the action of the spring force. We should check the filter capacitor, and then see if there is an open circuit in the loss-of-voltage release coil, and see if there is any deformation of the metal on it, and pay attention to the distance between the metal sheet and the ejector pin within 0.5-1 mm. In the above details, if the filter capacitor is broken, it is necessary to replace it in time. The coil of the loss-of-voltage release must also be replaced when the coil is open. The spring plate deformation needs to be corrected, and the gap problem needs to be adjusted. Down.
Circuit Breaker Enclosure design and selective action of upper and lower levels of protection appliances:
The selective action between the upper and lower levels of the protective device is one of the issues that electrical designers need to consider when designing and selecting circuit breakers. In order to avoid overstepping tripping, designers need to be very careful when designing and selecting circuit breakers.
According to the "Code for Design of Low-Voltage Electrical Appliances", "the action of the upper and lower protection appliances used in distribution lines should be selective: coordination and cooperation between all levels should be possible. cut off".
For a long time, designers have been accustomed to not delving into the protection selectivity of power distribution systems. The selective protection of circuit breakers has always been a difficult problem for designers. The phenomenon of tripping occurs frequently, but the leapfrog tripping of the main incoming circuit breaker of the transformer should be absolutely avoided.
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