In order to protect personal safety, to prevent indirect electric shock and the exposed conductive part of the equipment grounding is called: grounding wire.
Expanded knowledge
The following is the extended knowledge about the grounding wire:
A Basic Principle of the Grounding Wire
1, the principle of safety: the main grounding wire purpose is to ensure that the metal parts of the equipment to maintain the same potential with the ground to reduce the risk of electric shock and fire. When equipment leaks or fails, grounding can provide a low-impedance path for current to flow quickly to ground.
2, electromagnetic compatibility: grounding also helps to reduce electromagnetic radiation and electromagnetic induction, improve the electromagnetic compatibility of electrical equipment, and prevent the impact of electromagnetic interference on other equipment.
Two, the type of grounding wire
1, protective grounding: used to connect the equipment shell to provide protection against electric shock to the equipment.
2, signal grounding: used to connect the signal references of electronic equipment to ensure that the reference point of the signal is consistent, to improve the reliability of the equipment.
3, lightning grounding: used to guide the lightning current, to reduce the damage of lightning strikes on equipment.
Three, grounding system
1, single-point grounding system: all equipment is connected to ground through a single grounding point, suitable for small buildings and independent equipment.
2, multi-point grounding system: equipment connected to ground through a number of grounding points, can reduce the grounding resistance, suitable for large buildings and equipment.
3, equipotential grounding system: to ensure that all equipment is equipotential, reduce the potential difference between the equipment, improve the stability of the system.
Four, grounding resistance and testing
1, grounding resistance: measure the performance of the grounding system. Low grounding resistance means better grounding. Test grounding resistance regularly to ensure that it is within acceptable limits.
2. Grounding test instruments: Use professional grounding test instruments, such as multimeters and ground resistance testers, to perform accurate grounding resistance tests.
Fifth, the grounding of special environments
1, chemical plants: in the explosive gas environment, the need for anti-static grounding to prevent electrostatic discharge triggered by an explosion.
2, medical equipment: medical equipment requires special grounding protection to ensure the safety of patients and health care workers.
Six, grounding wire standards and norms
1, the International Electrotechnical Commission (IEC): IEC issued international standards on grounding systems and equipment, such as the IEC60364.
2, the U.S. National Electrical Safety Code (NEC): the U.S. NEC specifies the electrical system and equipment grounding requirements.
Seven, intelligent grounding system
1, intelligent grounding monitoring: the use of intelligent technology, real-time monitoring of the grounding system, timely detection of problems and take measures.
2, remote monitoring: remote monitoring system can be widely distributed grounding system for real-time monitoring and management.
Eight, grounding line and electromagnetic radiation suppression
1, electromagnetic field theory: to understand the formation and propagation of electromagnetic field law, reasonable design of grounding system, reduce electromagnetic radiation.
2, shielding grounding: in high-frequency circuits, the use of shielding grounding technology to prevent electromagnetic wave interference.
Nine, the future development trend
1, green grounding: explore green materials and green technology to enhance the environmental protection of the grounding system.
2, intelligent: with the development of the Internet of Things and big data technology, the future grounding system may tend to be intelligent, to achieve more intelligent monitoring and management.
Grounding wire as a vital part of the electrical system, its rational design and management for the safe operation of electrical equipment and personnel safety is critical. By gaining a deeper understanding of the basic principles, types, systems, testing methods, and future trends of grounding wires, we can better respond to the grounding needs in different fields and environments.