GIS 72.5 -550kV

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Product Description:

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


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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
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You do not want to what the transformer behind the high-voltage line,
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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)
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after the high and low voltage power failure, the work must be carried out before the first inspection
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Distribution equipment is generally referred to as the distribution lines and distribution substations (usually 35kV and below).
Q:CHINT group in the transmission and distribution equipment to do it?
Really is the leader in the domestic electrical industry!

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