The shaft trolley includes a power cabin and a working cabin. The power cabin is connected to the working cabin through a slewing mechanism for 360° rotation. The inner cavity of the slewing mechanism forms a through hole. The power cabin is connected to the working cabin through the through hole. Lifting agency. Increased construction safety and ensured construction quality and efficiency. Staircase Shaft,Construction Shaft Stairs,Shaft Stairs Passages,Shaft Stairs In Underground Anshan Lijian Engineering Group Co. LTD , https://www.lijianformwork.com
Principle of operation: The generation of switching transients is related to the following factors: switching of the main power supply system, minor switching actions or load changes in the vicinity of the power distribution system, resonance circuits related to the switching devices, and various system failures, such as grounding systems of equipment. Short circuit and arc fault. The direct lightning strike acts on the external circuit, and the injected large current flows through the grounding resistor or the impedance of the external circuit to generate a voltage, and indirect lightning strikes that induce voltage and current on the inner and outer conductors of the building. When the protection device is activated, voltage and current may change rapidly and may be coupled to internal circuits.
Power surge arresters are also called power surge protectors. They are the most commonly used type of surge protector and are primarily designed for surge protection chosen for power systems. In addition, there are network lightning protection devices, signal lightning protection devices, and so on. Power surge arresters include power supply lightning protection modules, power supply lightning protection boxes, and power supply lightning protection sockets. The lightning arrester is an integrated lightning protection scheme that combines lightning protection and other internal overvoltage intrusion into equipment to prevent damage from lightning protection and lightning protection. It introduces concepts such as external lightning protection and internal lightning protection, protection zone, lightning protection and other potential connections. The principle of the power lightning protection device was analyzed. The use of a lightning arrester can release a large amount of pulse energy generated by the lightning stroke on the circuit in the shortest time and discharge it to the earth, reducing the potential difference between the interfaces of the device and protecting the devices on the circuit. Lightning surge