1.1Scope of use and feature GW-12R/200-6.3 series outdoor high voltage disconnector switch is coordinated type construction of 3 poles,which is adapted to the power system of AC 50/60Ha,rated voltage 17.5KV,rated current 400A for protecting short circuit and overload of the carrying line and transformer,furthermore,can be operated with load. to meet different demand of the customer, a Zinc oxide of lightning arrester is assembled .the Air break switch has the capacity of breaking load current and the function of protecting short circuit,meanwhile,has obvious isolate breaking disstance,easy construction,suitable fafrication,reliable action

1.2 Type and definition:

1.3 Environment of use
a.The ambient air temperature is -40℃~+40 .
b.The altitude above ssea level is less than 1000m.
c.Wind speed does not exceed 30m/s.
d.The earthquake intensity does not exceed 8 degrees.
e.The installation situation shall be without frequent violent vibration.
f.The Air break switch shall be kept away from falmmable, explosive hazard,chemical corrosion and serious filth.

2.1 Structure(See fig.1)
The Air break switch is a coorcinated type disconnector switch with simple with simple interrupters and cutout fuse,No.1 in fig.1 is frame made of steel .No.2 is earth bolt,which connect the frame with earth wire in order to the safety of man and equipment in case that the frame is electriferous.N0.3 is supportin frame,used fo installing the switch on the single pole.No.4 is drive system ,the rotation part of the big shaft is fixed by rolling bearings,which is operated flexibly.No.5 is the in-between spring device,which is installed between the frameand rotation shaft so as to fulfill opening and closing quickly.No.6 is insulator,which is silicon rubber insulator with big creepage distance. the system of carrying current is made up of main blde and auxiliary blade. No.7 is main blade made of pure copper coating with tince alloy. No.8 is auxiliary blade made of stainless steel and with spring accelerated that can quick up opening speed of the auxiliary blade when opening gullotine.No.9 is interrupters made of clapboard with good characteristic of flame fetardant and interrupting.No.10 is cuout fuse .No.11 is handle,operated to open and close the brake with insulate rod for operator.
2.2 operating principle
The Air break switch is 3pole mechanical linkage type, and is only permitted to pull the "closing" ring in the NO.11 operating handle with insulate operation rod when opening and closing guilliotine,No.4 drive system make the big shaft move, when move to certain angle,the spring will be in-between, make the big shaft finish closing quickly,when opening,in the moment of main blade leaving and auxiliary blade not disconnecting completely,the accelerated equipment of sprign on the auxiliary blade is used to accelerate disconnecting ,and reduce to produce the arc.meanwhile,the No.9 interrupters limit the arc to diffuse so that to achieve to reduce the arc.
No.10 cutout fuse is assembled with 12KVfuse link,whten short circuit current is passed, the fuse link will melt quickly and under the action of fuse body and accelerated opening setting ,the fuse tube drops.

3.Main technical parameter: 3.1 main electrical parameter

1

Rated voltage

KV

12

2

Rated current

A

200

3

Rated frequency

Hz

50/60

4

Rated short-time withstand current/time

KA/s

6.3/2

5

Rated peak withstand current

KA

16

6

Max rated current of fuse

A

20

7

The rated current of the fuse link of the fuse

A

200

8

Short circuit breaking current of fuse

KA

6.3

9

1 min power frequency withstand voltage(phase to phase,phase to earth)

KV

42/48

10

Lightning impulse withstand voltage(Phase to phase,phase to earth)

KV

75/85

11

Mechanical life

times

2000

1

2

3

4

5

6

7

4.1 examination before installation
a.The Air break switch is only permitted to open and close in 17.5KV,400A and below.
b.Examine every fastener of rotation parts and supporting parts to see if they are loosen,and examine the insulators if they are broken.
c.After closing,the main blade and auxiliary blade shall be closed completely,otherwise,shall adjuxt again.
e.Examine fuse part to see if they are meet tightly and well.
4.2 Notice
a. the operator shall finish the operation without any pause and shall finish opening and closing quickly.do not be slow and pause.
b.The guillotine of the switch shall be opened when theoperator opeerates the fuse tube,and then bring the fuse tube into action or quit with isolate rod to make sure that the fuse tube is working in the condition of no load current.

5.1 Regular inspection:The switch shall be inspected after being used for 3 years.(it is according to load and times of using )

6.1Transportation
a. The Air break switch shall be kept from violent vibration and impact.
b.Pay attention to the notice in the package.
c.Do not be overweight when stowage.
6.Transportation and storage
6.1 Transportation
a. The Air break switch shall be kept from violent vibration and impact.
b.Pay attention to the notice in the package.
c.Do not be overweight when stowage.
6.2 Storage
a. it shall keep in ventilative and dry room when it will not be used for a long time.
b.Examine the technical documents and accessories in the box to see if they are complete

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