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: Power supply operation of power plant and substation in nowadays are used in DC power supply, it provides power for the control of the load and power load and DC emergency lighting load, is the foundation of modern electric power system control and protection

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:What is the role of transmission system and distribution system in power grid: The power load center is more concentrated in the industrial zone and the big city,

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:CHINT group in the transmission and distribution equipment to do it?: Really is the leader in the domestic electrical industry!

Q:Rural high voltage transmission line equipment ownership: the transformer can be what, look at the role of electrical appliances can be

Q:Main equipment of high voltage direct current transmission: It is composed of two or more converter bridges, which can realize the AC DC AC converter.

Q:AC distribution equipment including distribution box: AC power distribution cabinet is used to distribute electricity, that is from the power transformer has three phase wires of a zero line of a ground load according to the following requirements to the distribution of electric energy

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

Q:Transmission system and distribution system: Simply put, you can distinguish between the end of the cable to the use of electrical equipment (motor, power box) is the distribution system to the substation, transformer is the transmission system

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