What is the electrical and light electricity for the project? Why do electrical appliances in the house leak electricity and cause electric shocks to the user, then cause shocks when accidentally touching the metal shell of the device? Is the system necessary in human life? How much money does the system invest in? How to classify the actual system of reception? Is it necessary to install a system of contact? Why is the power outlet in high-class and standard projects 3-spoke, when the family home has only 2 spokes?
What is a reception system?
Simple to understand: A grounding system is a grounding system for electromechanical infrastructure, machinery and equipment involved in the use of electricity.
It is a system that conducts unwanted currents to the ground, does not cause electric shocks to the user, does not cause magnetic interference to equipment sensitive to current, ensures the safety of machinery and human life.
Grading of the reception system
According to the function, the system of reception is divided into 2 types:Safe and working contacts.
+ The main working contacts are the neutral continuation of the 3 phase downstream transformer.
+ Safe landing is to ressue the lightning protection system, to the power system, to the light power system.
In the category of this article, we only consider two types: electrical soy sauce systems and light soy-of-power systems. The working continuity related to the neutrality of the 3-phase power grid and the relay for the lightning protection system will be mentioned in the article with the link below:
DETAILS OF WORKING AND RESUCITATION FOR LIGHTNING PROTECTION SYSTEM:
About power system and light power system reception
- Electrical system: this system is for electrical appliances in the house and works: main electrical cabinets, distribution power cabinets, electrical appliances such as sockets, water heaters, computers, dryers, refrigerators, indoor water heaters, air conditioners, drills, cutters, …
- Light power system: This system is for light electrical equipment, devices sensitive to current: equipment in the Internet system, CCTV, television equipment, audio equipment, smart apartment control system, alarm, anti-theft, sensor …
Power System Contact Details:
Light Power System Contact Details:
Why install a system for light and light power systems?
During use, electrical equipment will leak electricity, possibly due to humidity such as water heaters, water heaters, computers, refrigerators, water pumps … or by the operating motor creating magnetic fields, then the variable magnetic field will generate current, this is the leakage of the equipment (this phenomenon in the factory, There are a lot of accidents in the industrial park and there are huge consequences.
This excess leakage current if not destroyed, it affects the electronic boards of the equipment, devices sensitive to current, electrical impulses damage the board, leading to damaged equipment, inactivity, costing repairs and replacing completely new. In addition, the manufacturer will not guarantee if the equipment is not installed in accordance with the recommendation that there must be a contact to ensure safety.
In addition, it also causes jerks for the user when accidentally touched, the leakage can be deadly, very dangerous.
The need for a secure accession system for light and electrical systems
Its name speaks to the nature of the system, making machines, equipment and users electrically safe.
When we read this, we must also acknowledge the need to install a touch-to-access system. Now, the quality of life is increasing, so the use of the reception system is almost a must in a project, apartment, townhouse, villa.
Is it difficult to install a system? How much money is running out?
Basically, installing a grounding system is not difficult, but it requires meeting the requirements of grounding, otherwise there is no safety and protection effect.
In addition, for large-scale and specific projects, the reception system will have stricter requirements, making the installation also more difficult.
The cost of a relay system is very cheap compared to the value that it brings, most of the current works invest in this system, the power supply drive with 3 spokes gradually prevails as such a cause, 1 locust is the contact wire, theremaining 2 spokes provide a hot and cold source. Especially for light power systems, safe access is a must.
Standard of light and electrical and electrical reception system
The grounding system for houses and civil works is very easy, basically the ground is similar to the ground of the lightning protection system, but the requirements are higher, requiring the grounding system to reach a ground resistance of less than 4 Ohm, while the light grounding system is more demanding, must be below 1 Ohm, the reception for medical machinery must be below 0.5 Ohm.
The system of reception for systems in factories and industrial parks is slightly different, but it is basically the same as the system for home and construction. In the factory, the leakage of machinery equipment is very large, in addition to it has a contact knife,… I don't go into details here because such a post will be very long. There will be another article dedicated to the factory reception system.
Some basic features of the system.
When there is a receiving site, just make a box of relay wires,then from here pull back to connect to the system in the power cabinet, then divide to the consumption load locations. The blue gold power cable, commonly known as the TE wire, is exactly the contact wire,so that the currents leaking along this cable escape to the ground, ensuring the safety of the device, not causing electric shocks to the user. The native resplament remains a wire and has an estimated area according to the leaking current, or can be obtained by or less than a 1-level neutral wire.
