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

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

Q:What are the general requirements for working on distribution equipment?: Distribution equipment including high voltage power distribution room, substation, power distribution transformer platform, low voltage power distribution room (box), ring network cabinet, cable branch box] outage maintenance,

Q:Are electric wires and cables belong to distribution equipment?: Wire and cable for the transmission of electric (magnetic) energy, information and realize electromagnetic energy conversion of wire products, wire and cable general also referred to as the cable,

Q:Power distribution equipment should be prepared before the blackout?: Before the power failure, the person in charge or the electrical appliance technician should fill in the work order.

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 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: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: so there will be in the power distribution cabinet a reference line and a zero line selection of single-phase 6A can switch.

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.

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