4 Axis Square Pipe&Sheet Plasma Cutting Machine mainly for 4 axis 3D square pipe cutting.
1. This design fit for multifunction cutting requirements: both metal sheet and square pipe continuous cutting
2. Accept OEM for any pipe cutting diameter and working length. ( Normally from 100x100mm up to 600x600mm dia. )
3. Accept OEM for any table size: likes 4x4, 4x8 Plasma Cutting Table
4. Accept any materials cutting: Iron plate, Stainless steel plate, Titanium plate, Galvanized sheet, Aluminum plate, High speed steel, etc
4 Axis Square Pipe & Sheet Cutting Machine Tube Cutting Machine,4 Axis Square Pipe Cutting Machine,4 Axis Square Pipe,Cnc Tube Cutter Jinan Huaxia Machinery Equipment CO.,Ltd , http://www.cnmetalcutting.com
(A) Classification of the role of grounding
Generally divided into protective grounding and functional grounding:
1. Protective earthing (1) Earthing against electric shock To prevent electric equipment from being damaged by insulation or causing a leakage current, the exposed electrically conductive parts that are not energized at ordinary times can cause electric shocks, and the exposed conductive part of the equipment is grounded, which is called grounding against electric shock. This kind of grounding can also limit the high voltage caused by the inrush current or low-voltage line and equipment due to high-pressure intrusion; when an electrical failure occurs, it is beneficial to the operation of the over-current protection device and cut off the power supply. This kind of grounding is also a narrow sense of "protective grounding."
(2) Lightning protection grounding will lead people to earth and prevent lightning currents from causing electric shock or damage to property.
(3) Anti-static grounding Introduce electrostatic charges to the earth to prevent damage to the human body and equipment due to electrostatic accumulation. In particular, integrated circuits in electronic devices are currently used in many ways, and integrated circuits are prone to malfunctions due to electrostatic effects, and the integrated circuits can be prevented from being damaged after being grounded.
(4) Anti-corrosion grounding The buried metal body is used as a sacrificial anode or cathode to prevent electric corrosion of cables and metal pipes.
2. Functional grounding (1) Work according to the ground In order to ensure the power system operation, prevent system oscillation. To ensure the reliability of relay protection, ground the AC/DC power system at an appropriate place. The AC is generally a neutral point. DC is generally the midpoint. In the electronic equipment system, the AC/DC grounding is considered to be other than the electronic equipment system. Power ground. (2) Logic grounding In order to ensure a stable reference potential, appropriate metal parts in electronic equipment are used as “logical groundsâ€, and metal backplanes are generally used as logic grounds. Grounding of logic grounds and other analog signal systems is often referred to as DC ground. (3) Shield grounding will introduce electrical interference sources into the earth, suppress the influence of external electromagnetic interference on electronic devices, and also reduce the interference generated by electronic devices and affect other electronic devices. (4) Signal grounding Grounding to ensure that the signal has a stable reference potential, such as grounding for detecting leakage currents, grounding of electrical parameters such as impedance measurement bridges and corona discharge loss measurements.
(B) Classification by grounding
The grounding poles can be divided into outer-type grounding poles and loop-type grounding poles according to their arrangement. According to its shape, there are several basic forms of tube, band and ring. According to its structure, there is a distinction between a natural ground electrode and an artificial ground electrode. The earth's poles are used as: metal pipes for water access; metal structures for structures and structures that are reliably connected to the earth; and cable jackets and cables installed in the ground and their number is not less than two and are laid underground. Metal pipes. However, except for flammable liquids and flammable or explosive gas piping. Used as artificial grounding poles, there are steel, angle steel, flat steel and round steel and other steel. For example, in chemically corrosive soils, the galvanized steel or copper electrodes mentioned above should be used.
After laying the grounding device, the electrical equipment is of course much safer than when no grounding device is applied. However, if the arrangement of the grounding device is a single grounded electrode or an externally grounded grounding electrode, the human body is still inevitably exposed to the danger of electric shock due to the uneven potential distribution. In addition, the reliability of a single grounded or externally grounded electrode is also poor. We know that the externally grounded pole is connected to the indoor grounding trunk only by two mains. If the two main lines are damaged, the entire grounding line is cut off from the grounding pole. Of course, the situation where two trunk lines are damaged at the same time is relatively small.
The detection principle of the "Kian An" vibration cable alarm system is similar to that of a radar. A detection signal is transmitted along a vibration cable, a reflected signal is detected at the same time, digital processing is performed, and the position where the invasion occurs is calculated based on the time difference between the reflected signal and the transmitted signal. The signal strength determines the amplitude of the vibration. Through the intelligent identification algorithm, the interference signals caused by rain, wind, and vehicles are identified and filtered to reduce the false alarm rate. The final system accurately identified intrusion events such as shearing and climbing and their specific locations, with a positioning accuracy of 1 meter and an error of ±2 meters. The detection principle of the "Kian An" vibration cable alarm system is similar to that of a radar. A detection signal is transmitted along a vibration cable, a reflected signal is detected at the same time, digital processing is performed, and the position where the invasion occurs is calculated based on the time difference between the reflected signal and the transmitted signal. The signal strength determines the amplitude of the vibration. Through the intelligent identification algorithm, the interference signals caused by rain, wind, and vehicles are identified and filtered to reduce the false alarm rate. The final system accurately identified intrusion events such as shearing and climbing and their specific locations, with a positioning accuracy of 1 meter and an error of ±2 meters.
The detection principle of the "Kian An" vibration cable alarm system is similar to that of a radar. A detection signal is transmitted along a vibration cable, a reflected signal is detected at the same time, digital processing is performed, and the position where the invasion occurs is calculated based on the time difference between the reflected signal and the transmitted signal. The signal strength determines the amplitude of the vibration. Through the intelligent identification algorithm, the interference signals caused by rain, wind, and vehicles are identified and filtered to reduce the false alarm rate. The final system accurately identified intrusion events such as shearing and climbing and their specific locations, with a positioning accuracy of 1 meter and an error of ±2 meters.