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Ek6-40.5kv Earthing Switch

Basic Info

Model No.:  EK6-40.5

Product Description



Model NO.: EK6-40.5


Highest Working Voltage: 40.5kv Earthing Switch


Rated Dynamic Stable Current(Peak Value): 80ka Earthing Switch


Pole Centers: 280mm Earthing Switch


Transport Package: Wooden Case Packing (900*900*1000mm)


Origin: Cixi, Ningbo, Zhejiang




Rated Voltage: 35kv Earthing Switch


4s Rated Short Time Withstand Current: 31.5ka Earthing Switch


Making Current(Peak Value): 80ka Earthing Switch


Trademark: Mingde


Specification: OHSAS/ OHSMS 18001, ISO9001


HS Code: 8535210000



Ek6-40.5kV Earthing Switch



1. Summary



Earthing Switches of series EK6 are determined for indoor in stallation and conform to the requirements of GB1985 and IEC 62271-102. They are fitted with snap-action operating mechanisms for positive high-speed closing and sufficiently dimensioned to conduct the rated short-circuit making current when closed under load. The speed of the snap-action closing operation is independent controls. The earthing switches are supplied as kits with a pre-assem bled active part and correspon ding earthing con tacts supplied loose. Correct in stallation of these parts in a switchgear panel results in a functioning earthing switch. Routine tests toGB1985 and IEC 62271-102 are to be carried out at site accordingly.



2. Normal Using Ambient Conditions



(a) ambient air temperature: upper limit +40ºC;lower limit - 25ºC

Remark: allow to store and transport under - 30ºC

(b) altitude limit: under 1000m

(c) relative humidity: under 90%

(d) earthquake intensity : not higher than class VIII

(e)the place should be without fire,explode danger, serious dust, chemical corrosion and strong shork.



3. Technical Parameters


Model
Rated
voltage
(kV)
Highest
working
voltage
(kV)
4S rated short
time withstand
curren(kA)
Rated dynamic
stable current
(peak value)
(kA)
Making
current
(peak value)
(kA)
Pole
centers
(mm)
Making
speed
(m/s)
Main circuit
contact
resistence
(μΩ)
EK6-12/31.5-210
10
12
31.5
80
80
210
>6
<120
Ek6-40.5/31.5-280
35
40.5
31.5
80
80
280
>6
<120



Remark: the pole centers can be changed according to customers' requirement


4. Product Model and Meaning



6.Struction and Function



Ek6-40.5kv Earthing Switch

5. Outline Dimension Drawing

Ek6-40.5kv Earthing Switch

Ek6-40.5kv Earthing Switch

Earthing switches of series EK6 have three pairs of earthing blades which are located on the operating shaft and are freely movable. The pairs of earthing blades are electrically connected to each other by a shortcircuiting bridge and to earth potential at the bearing brackets by two stranded copper conductors. Driver levers and toggle springs located between the bearing brackets are used to transmit the force during the switching process. Fixing the active part on a torsionally rigid switchgear panel wall or cross beam provides it with the necessary stability.

The earthing contacts designed to suit the relevant switch type are to be bolted to the conductor bars supported on suitable insulating parts, e.g. pintype insulators, on the opposite side and parallel to each other, and the position adjusted until it conforms to that show in the dimensional drawings. The earthing switch has a snap action closing mechanism which functions independently of the rotation of the drive shaft. The switching speed and torque achieved in this process are independent of the actions of the operating mechanism.

In the opening process, in contrast, the toggle springs have no effect on the speed of contact separation. A ring lever or suitable manual or motorized operating mechanism with the necessary torque for the type of switch and an operating angle 90° can be fitted for operation of the switch.

Note: Always open earthing switches by turning until the stop is reached.

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