IT system is to protect the grounding system. The so-called grounding is to closely connect a part of the equipment to the earth through the grounding device.
The ground voltage is the potential difference between the charged body and the earth with zero potential. Obviously, the ground voltage is equal to the product of the grounding current and the grounding resistance: Ud=Rd×Id.
The neutral wire of the transformer is grounded and divided into two, one is for the working zero wire and the insulation, and the other is for the protection of the zero wire and the shell. This is the so-called TN-S system (i.e. three-phase fire wire, a zero wire, and a ground wire).
TT TN IT power supply system is named according to the different neutral point grounding N, public protection line PE, and protection neutral line PEN junction.The TT system refers to the three-phase four-wire, the neutral point is directly grounded, and the equipment is connected to the PE line. That is, the equipment shell is directly grounded.
TT system is a system in which the neutral point of the power supply is directly grounded and the shell of the electrical equipment is also directly grounded. Usually, the grounding of the neutral point of the power supply is called working grounding, and the grounding of the equipment shell is called protective grounding. In the TT system, these two groundings must be independent of each other.
TT system is a system in which the neutral point of the power supply is directly grounded, and the exposed conductive part of electrical equipment is also directly grounded. Usually, the grounding of the neutral point of the power supply is called working grounding, and the grounding of the exposed conductive part of the equipment is called protective grounding. In the TT system, these two groundings must be independent of each other.
IT system is a kind of low-voltage power distribution system, and "protective zero connection system" is only a one-sided statement. Definition of IT system: a system in which the neutral point of the power supply is not grounded, and the exposed conductive part of the electrical equipment is directly grounded. The IT system can have a neutral line, but IEC does not recommend setting a neutral line.
IT system is the right way to protect the zeroing system. It is a system in which the charged part of the power supply system is not grounded, or the exposed conductive part of the electrical equipment is grounded through impedance grounding. Nowadays, most of the grounding and zeroing systems adopt the standards stipulated by the International Electrotechnical Commission (IEC).
IT system is an international standard IEC60364 that distinguishes three different types of grounding systems, using two letter codes to represent TN, TT and IT. The first letter indicates the relationship between the power supply end and the ground: T indicates that the power supply end is directly grounded;I means that all the charged parts of the power supply are not grounded or grounded by impedance.
Trade data for renewable energy sector-APP, download it now, new users will receive a novice gift pack.
IT system is to protect the grounding system. The so-called grounding is to closely connect a part of the equipment to the earth through the grounding device.
The ground voltage is the potential difference between the charged body and the earth with zero potential. Obviously, the ground voltage is equal to the product of the grounding current and the grounding resistance: Ud=Rd×Id.
The neutral wire of the transformer is grounded and divided into two, one is for the working zero wire and the insulation, and the other is for the protection of the zero wire and the shell. This is the so-called TN-S system (i.e. three-phase fire wire, a zero wire, and a ground wire).
TT TN IT power supply system is named according to the different neutral point grounding N, public protection line PE, and protection neutral line PEN junction.The TT system refers to the three-phase four-wire, the neutral point is directly grounded, and the equipment is connected to the PE line. That is, the equipment shell is directly grounded.
TT system is a system in which the neutral point of the power supply is directly grounded and the shell of the electrical equipment is also directly grounded. Usually, the grounding of the neutral point of the power supply is called working grounding, and the grounding of the equipment shell is called protective grounding. In the TT system, these two groundings must be independent of each other.
TT system is a system in which the neutral point of the power supply is directly grounded, and the exposed conductive part of electrical equipment is also directly grounded. Usually, the grounding of the neutral point of the power supply is called working grounding, and the grounding of the exposed conductive part of the equipment is called protective grounding. In the TT system, these two groundings must be independent of each other.
IT system is a kind of low-voltage power distribution system, and "protective zero connection system" is only a one-sided statement. Definition of IT system: a system in which the neutral point of the power supply is not grounded, and the exposed conductive part of the electrical equipment is directly grounded. The IT system can have a neutral line, but IEC does not recommend setting a neutral line.
IT system is the right way to protect the zeroing system. It is a system in which the charged part of the power supply system is not grounded, or the exposed conductive part of the electrical equipment is grounded through impedance grounding. Nowadays, most of the grounding and zeroing systems adopt the standards stipulated by the International Electrotechnical Commission (IEC).
IT system is an international standard IEC60364 that distinguishes three different types of grounding systems, using two letter codes to represent TN, TT and IT. The first letter indicates the relationship between the power supply end and the ground: T indicates that the power supply end is directly grounded;I means that all the charged parts of the power supply are not grounded or grounded by impedance.
How to align trade data with marketing
author: 2024-12-24 02:13Heavy machinery parts HS code verification
author: 2024-12-24 01:34Global trade intelligence for investors
author: 2024-12-24 00:55HS code categorization for finished goods
author: 2024-12-23 23:59HS code alignment for halal imports
author: 2024-12-24 01:04HS code-based duty drawback claims
author: 2024-12-24 00:56Global import export freight indexes
author: 2024-12-24 00:51How to forecast trade demand spikes
author: 2024-12-24 00:33International market entry by HS code
author: 2024-12-24 00:02117.46MB
Check344.79MB
Check484.28MB
Check677.38MB
Check624.69MB
Check281.66MB
Check977.15MB
Check263.37MB
Check156.11MB
Check187.88MB
Check944.61MB
Check238.57MB
Check596.94MB
Check849.15MB
Check945.87MB
Check724.35MB
Check196.37MB
Check424.13MB
Check864.94MB
Check428.91MB
Check229.54MB
Check433.26MB
Check193.65MB
Check729.41MB
Check375.47MB
Check215.72MB
Check825.24MB
Check868.48MB
Check579.48MB
Check915.81MB
Check159.97MB
Check129.42MB
Check692.87MB
Check713.43MB
Check419.61MB
Check785.39MB
CheckScan to install
Trade data for renewable energy sector to discover more
Netizen comments More
922 Customs authorization via HS code checks
2024-12-24 01:54 recommend
2659 How to secure international sourcing
2024-12-24 01:50 recommend
1189 Trade data for raw materials
2024-12-24 00:41 recommend
1750 HS code-based opportunity scanning
2024-12-24 00:16 recommend
2584 Comparative trade route analysis
2024-12-23 23:45 recommend