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.
Pet feed HS code verification-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.
HS code-based competitive advantage analysis
author: 2024-12-23 22:24HS code variance across regions
author: 2024-12-23 22:15Global trade customs valuation analysis
author: 2024-12-23 22:10Granular HS code detail for compliance officers
author: 2024-12-23 21:05How to integrate HS codes in ERP
author: 2024-12-23 22:16Advanced customs data integration
author: 2024-12-23 22:15Country-wise HS code tariff relief
author: 2024-12-23 20:55Trade flow analysis by HS code category
author: 2024-12-23 20:15368.46MB
Check562.12MB
Check464.33MB
Check621.49MB
Check824.31MB
Check314.67MB
Check211.54MB
Check941.43MB
Check275.53MB
Check333.98MB
Check233.76MB
Check783.56MB
Check285.82MB
Check848.41MB
Check441.74MB
Check297.95MB
Check119.41MB
Check395.74MB
Check241.11MB
Check385.72MB
Check343.12MB
Check198.66MB
Check284.83MB
Check214.68MB
Check921.44MB
Check917.74MB
Check418.44MB
Check742.84MB
Check989.68MB
Check768.14MB
Check539.19MB
Check318.47MB
Check457.18MB
Check644.76MB
Check398.18MB
Check798.59MB
CheckScan to install
Pet feed HS code verification to discover more
Netizen comments More
1983 Apparel import export statistics
2024-12-23 21:17 recommend
904 Automated import export risk alerts
2024-12-23 21:03 recommend
2968 Global trade compliance certifications
2024-12-23 20:40 recommend
1786 Trade data for logistics companies
2024-12-23 20:38 recommend
2889 Global trade compliance playbooks
2024-12-23 19:57 recommend