Application of miniature electronic circuit breaker box circuit breaker in lightning protection engineering
Lightning arrester circuit breaker (small circuit breaker) in the role of lightning protection engineering is when the power arrester failure, a power arrester with the circuit disconnected device, it can prevent when the power arrester failure grounding short circuit fault current damage equipment. The mini-circuit breaker connected in series in front of the power arrester must guarantee the short-circuit bearing capacity of the arrester. In this case, all the lightning current must be discharged through the arrester into the ground during the response time of the overcurrent protection device, the mini-circuit breaker. But when the current is very big and long duration, beyond the short-term resistance current (Icw) of circuit breaker, the breaker will still action, lightning arrester and the protected line disconnect, therefore, the subsequent lightning flows along the road to continue to spread, this requires a power supply system lightning protection, should be based on the importance of the equipment and lightning environment multi-stage lightning protection measures are taken to avoid the equipment Damaged by lightning.
The correctness of the position of the stopper is also closely related to the normal operation of the Electronic Circuit Breaker Box. 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.
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