GW4-24DD Double Earthing Switch Installation and Operation Manual

- Jul 18, 2019-

General

Series GW4 HV disconnectors are 3-phase AC 50Hzhigh voltage switchgears.They are used in no-load condi-tion to switch off the electric circuit and isolate electrically the power appareatus such as high voltage bus,circuit breaker etc and high voltage line in 35220(245)kV pow-er system.

This type of product can be divided into either types:without earthing switch,with single earthing switch and double earthing switches or general type:pollution-proof type and plateau type.

The series GW4HV disconnectors are conformed with every specifications in National Standards and IEC Stan-dards,and can meet the needs of 9degrees of earthquake intensity 4.9m/s²for vertical acceleration).

Service conditions of product

1)      Above sea level:1000m;2000 m;3000 m

2)      Ambient temperature:+40-30

3)      Wind velocity;35/ m/s

4)      Earthquake intensity;9 degrees

5)      Ice-coated thickness;10mm

6)      Autipollution class: Class I(General type)

Class II(Autimedium type)

Class III(Autisevere pollution type)

7)      The produets can not be used at such places where there are some combustible substances, explosive dangers, chemical corrosion and intensive vibration.


Composition of type of product

The full-type of product stands for the series,variety and specification of the prodcut,lt consinsts of capital let-ter of tirsr Chinese

Phonetic symbol of product’s name,N(indoor)or W(outdoor),series number,rated volatge,featured mark and specification (rated current and charac-teristic factor).

























Notes:The earthing switch is classified as both single-earthed type and double-earthed type,and also as both tpye I and type II according to the peak cur-rent and short-time current that the earthing switch can withstand,(Type I -General type;Type II -This type of earthing switch can with-stand the peak current and short-time currentwhich value is the same as that of main circuit).Itshould be specified when ordering and it is not ex-pressed in the composition of type).


Construction

The series GW4 HV disconnectors are of double pole structure,mainly consisting of frame,porcelains and con-ductive parts. Two Porcelain poles of each phase are mounted respectively on bearing holders of  both ends of the frame,and connected by cross links for horizontal rota-tion. Each of the conductive blades is divided into two halves ficed on the two supporting porcelains,and the con-tact part is right in the middle.

When the mechanism is operated one of the supporting porcelains rotates for 90º,the other also turns round 90ºat the same time due to driving of the links, so that twoblades rotate towards the same xide to perform open or close operation.

The series disconnectors are mounted either without earthing switch or with one or two earthing switches,and mechanical interlock is set between the main blade and the earthing switch.


Technical data

   产品型号Type

 

参数Data 

GW4-24

额定电压    Rated voltage                kV

24

最高工作电压Max.working voltage         kV

27.5

额定电流Rated current                      A

400

630

1250

热稳定电流(有效值)

Short time withstand current (rms)           kA

16

20

31.5

动稳定电流(峰值)

Peak withstand current (peak)              kA

40

50

80

Imin工频耐压(有效值)

Imin power frequence withstand

voltage (rms)

对地to earth

45

断口

between breaks

55

雷电冲击耐受电压(峰值)

Lightning impulse withstand

voltage(preak)

对地to earth

105

断 口

between breaks

125

接线端水平拉力Horizontal force of terminal  N

500

   Remarks


 

Note:(   )means the value which is practically adopted in the products.


Technique request

1).Is each to turn to move the department to operate after the gearing should vivid;

2).Conduct electricity part of and each turn to move to rub the part to draw the lubricant

 


 Pack the detailed list

序号 No

   Name

数量Number

不接地

No-earthed

右接地|

Right-earthed

左接地

Left-earthed

双接地

Double-earthed

1

户外高压隔离开关

The outdoor exchanges HV disconnerctor.

1

1

1

1

2

CS8-6D手动机构

CS8-6D move the organization

1

1

3

CS11G手力操动机构

CS11G move the organization

1

2

1

4

CJ6电动机构|Electric the organization

1

1

1

1

CS11G手力操动机构

CS11G move the organization

1

1

2

5

接头Deal with contact

2

2

6

接头Deal with contact

2

2

7

接头Deal with contact

2

2

8

接头Deal with contact

2

2

9

开口销4H25   Openings pin 4H25

3

3

6

6

10

带孔销12H50   Take the bore pin12H50

3

3


Ordering

   1)When ordering,please specify the followings clearly:

   2)Type,name,rated voltage,rated current and earthing method (without earthing swith or with one or two earthing switches).

   3)Type and control votage of operating mechanism.

   4)Type of manual mechanism and number of pairs of accessory.

   5)Specification of electro—magnetic lock for manual mechanism.