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: What are the two power distribution equipment?: Primary equipment is the equipment used in the main system of transmission, transmission and distribution

Q: What is the power equipment in the distribution room?: The indoor power distribution room with low voltage load is called the power distribution room,

Q: What is the difference between power supply and distribution: The problem is you estimate from the injection test out the electric power, is the power system of power plant and the national grid is responsible for part of the design, the design of power plant and power lines, its design must be designed by a qualified electric power design institute

Q: Are electric wires and cables belong to distribution equipment?: Wire rod products for the transmission of electric (magnetic) energy, information and electromagnetic energy conversion.

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 parallel compensation device, such as static var compensator (SVC), thyristor controlled braking resistor (TCBR), static

Q: What is the transmission line, what is the power distribution equipment: Distribution equipment is generally referred to as the distribution lines and distribution substations (usually 35kV and below).

Q: Rural high voltage transmission line equipment ownership: You do not want to what the transformer behind the high-voltage line,

Q: Transmission and transformation equipment: Power transmission and transformation of the protection of the main transformer, relay protection devices, lightning arrester, etc..

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