Application

GW4 Outdoor AC high voltage isolation switch is a two-column three-phase AC 50Hz outdoor high voltage switchgear for power system voltage 10-220kV, the supply voltage at no load for hours together circuits, as well as being on the high voltage bus overhaul , circuit breakers and other electrical equipment and charged high voltage lines for circuit isolation. Pollution prevention isolating switch which can meet the requirements of users in the region re-contamination, and can effectively address the isolation switch in the operation of the flashover problem.

Isolation switch is open double-column horizontal type, the composition of each single stage by the dock, post insulators, outlet and contact other parts of the seat, the two pillars of the insulating porcelain mounted parallel to each other on both ends of the bearing `, and the base vertical . Leading electrical part were installed in the two pillars above the porcelain insulator, porcelain insulator with pillars do 90 ° rotation.

Each bearing has a built-in isolation switch shaft assembly, the assembly between the two axes by connecting plates, screws and other connecting the drive to adjust.

Refers to the middle portion of the contact pairs of the contact assembly, using self-elastic contact finger in the form of roll-in, in order to reduce opening and closing the contacts and the contact fingers of wear and improve life.

Disconnectors with earthing switch, fan-shaped plate leading electrical circuit and grounding switch and interlock with the base of the curved panels that switch on when leading electrical circuit, grounding switch is not closing, when the grounding switch is closed, the leading electrical circuit can not be closed. Chain plate chain disconnectors and earthing switches on the realization by the agency when equipped with CS8-6D.

Features

Isolating switch with double column, contact into open type structure, has the ability of self cleaning contact, improve the contact reliability;

Finger made of new material with high strength, high conductivity, high elastic. Relying on the elastic contact finger clamping itself, to avoid the spring corrosion, contact clamping fever caused by annealing

Force to reduce the contact resistance increases, the contact heat intensified the vicious spiral.

The rotating part according to the design requirements of the isolating switch maintenance free. The rotating seat designed seal structure, moisture, dust and harmful gas can not enter, bearing, molybdenum disulfide lithium base grease will never work in

A good environment, bearing, never rust, grease can not be lost, never dry up, the isolation switch operating torque will increase after long term operation. Stainless steel shaft and oil-free self-lubricating bearing

With the structure of steel by hot dip galvanizing, ensure the isolation switch operation is flexible, portable and reliable, never rust.

Technical Parameters

  RH-B High Voltage Disconnector Switch

Item

Unit

Technical parameters

Rated voltage	kV	10	15	24
Max. operation voltage	kV	12	17.5	27

Rated insulation level

1min power frequency withstand voltage

Rated lightning impulse

To earth                  kV       38                                 40                                50

Across open DS     kV       45                                 47                                60

To earth                  kV       75                                 105                              125

Overall And Installation Dimension

withstand voltage	Across open DS	kV	85		120		145
Rated frequency		Hz	50
Rated current		A	200	400	630	1250	1600	2000
Short time withstand current 4s(Eff).		kA	6.3	12.5	20	31.5	31.5	40
Rated peak withstand current		kA	16	31.5	50	80	80	100
Rated duration of short-circuit		S	4

Rated mechanical terminal vertical load                                N         245

Mechanism supplied for disconnector                                             manual mechanism or motor drive mechanism

Earthing switch rated parameter for discnnector assembling

Earthing switch use for cutting off the residual current , the dynamic and thermal current without examination

 

 Normal Service Conditions

a. Altitude: 1000-2000mb.
b. Ambient temperature: no more than 40℃ and no less than-30℃ (no less than-40℃ in alpine areas)
c. Wind pressure: ≤700Pa (equaling wind velocity of 34m/s)
d. Earthquake intensity: ≤8
e. Ice thickNess: ≤10mm
f. The installation location shall be free from flammable. explosive dangerous articles,chemical corrosion and fierce vibration
g. The pollution grade of post insulator: 0 for general type and II for pollution resistance type