GIS 72.5 -550kV

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Specifications

80% of the power frequency withstand voltage
the leak rate is low
high operating reliability
good safety performance

Introduction :
Release time :
2012-8-22 Product Description: Product role With 72.5 ~ 550kV GIS Current Transformer, sulfur hexafluoride gas insulation, mainly used in power systems power measurement, current measurement and relay protection.
Product structure

Features
1, insulation stable: 80% of the power frequency withstand voltage under the partial discharge amount not greater than 5pC.
2, the leak rate is low: annual leakage rate of less than 0.3%, far better than the 1% of the requirements of the GB.
3, high operating reliability: pressure SF6 gas zero table, safe operation can be a long time.
4, good safety performance: explosion-proof device with excellent explosion-proof performance.
5, high precision: measurement up to meet the 0.1 level.
6 protection: protect the winding core of high permeability and saturation flux density is high (greater than 1.8T).
Technical parameters

Type	L (S) R-72.5	L (S) R-126		LR-220		LR-500
The devices rated voltage, kV	66	110		220		500
The * Device highest voltage, kV	72.5	126		252		550
Rated frequency Hz	50-60
* Short-time power frequency withstand voltage, kV	160	230		460		740
* Lightning impulse voltage, kV	350	550		1050		1675
Partial discharge level (1.2Um / √ 3)	<5pC
* Rated current, A	300-300	300-300	300-4000			600-5000
* Rated secondary current, A	5 or 1.				1
* Accuracy class (subject combinations)	0.2S; 0.2; 0.5S; 0.55P; 10P
* Rated output, VA	15-50	15-50		10-50		10-30
Safety factor, FS	5 or 10
* Accuracy Limit Factor, ALF	10-40
Short-term thermal stability current, kA / s	40/3	40/3		31.5-63 / 3		50-63/3
Rated dynamic current, kA	100	100		80-125		125-160
SF6 rated pressure (20 ° C), Mpa	0.4
A SF6 Buqi pressure (20 ° C), Mpa	0.35
SF6 gas leakage rate,%	<0.3
SF6 moisture content, μL / L	<150

Q: DC transmission equipment: DC screen commonly known as intelligent maintenance free DC power supply screen, referred to as DC screen, the general model is GZDW.

Q: Transmission system and distribution system: Transmission system is based on the power supply to the same level or lower substation for the purpose of the general voltage level higher (35KV or more)

Q: What is the role of transmission system and distribution system in power grid: power plant and the load center often separated by long distances, resulting in the problem of power transmission. The power is sent to the user only hydropower area can be fully utilized by high voltage transmission line

Q: Distribution system equipment classification: The equipment can be used not only in the iron and steel industry, but also in the chemical and metallurgical industries

Q: High and low voltage distribution equipment: High voltage distribution equipment: high voltage fuse; high voltage isolation switch; high voltage load switch; high voltage circuit breaker.

Q: Transmission lines are not electrical equipment?: Transmission lines in the power transmission project belongs to the carrier, belonging to the power cable category, should not be called equipment

Q: An introduction to the interpretation of flexible AC transmission systems: The series compensation device such as thyristor controlled series capacitor (TCSC), thyristor controlled reactor (TCSR), static synchronous series compensator (SSSC), active power flow is mainly used to change the system of distribution, improve the system transmission capacity and transient stability etc.;

Q: What is the transmission line, what is the power distribution equipment: As the name implies, the transmission is by the power plant or power center regional power grid (sending end), to the load center power grid (by the end) of the transmission of electricity; power distribution is to be distributed by the substation or bus power down.

Q: Difference between distribution voltage and supply voltage: Supply voltage refers to the supply point of the line voltage or phase voltage.

Q: CHINT group in the transmission and distribution equipment to do it?: The national grid is not purchasing some equipment of CHINT, CHINT group is now very powerful

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