Energy-saving products Categories Circuit breaker

Constant component: F0 = Fatm / 2 (Fatm = 107 B2 MS / 8π)

Alternating component: F ~ = F0 cos 2ωt.

At work, due to the armature reaction force always been the role of the spring, the contact springs Fr reaction force, the electromagnetic suction averages Fat> Fr; when Fat <Fr armature at the beginning of the release, Fat> Fr armature also was attracted state, so Again and again, the armature Inverter Power Supply‍ vibration and noise. At this point in the alternating magnetic core produced by hysteresis loss and eddy current loss will cause the core heat (superposition of silicon can play a role in reducing the eddy current losses). To reduce operating noise is usually open in the small capacity of the electromagnetic system yoke ends embedded in a small groove corresponding short-circuit ring, and its role is to be divided into two parts by the core flux, that does not pass through the magnetic flux Φ1 and short-circuit loop the magnetic flux Φ2 through the short-circuit loop, and Φ2 lag Φ1, suction is always greater than the synthesis reaction, thereby reducing the vibration and noise, but also increases the copper loss accordingly.

AC contactor power mainly by the retention power and pull the power of two parts, although larger coil pull starter instant power, but time is very short (tens of ms); working time has been in the retention hold (at this energy loss is mainly concentrated in the state of retention on iron loss). That is why if they can reduce the AC contactor work retention can save energy consumption, according to this principle, the current energy air circuit breaker‍ contacts broadly categorized as follows:

1. Saver

Saver is divided into: capacitive, transformer, duty cycle (change) type. AC contactor Saver corresponding supporting the use of the contactor in the DC state retention operation, so to save energy. Saver AC contactor solenoid due to electromagnetic energy and the internal device Saver limitations generally applicable to the rated current of 60 ~ 600A AC contactor, lower than 60A AC contactor because the stored Electric transformer‍ electromagnetic solenoid can run in DC maintain its pull; electromagnetic greater than 600A AC contactor can be easily generated so Saver damage internal components.