Load switch VNA

Load break switches in ON intended for switching on and disconnect under load parcels circuit three phase AC industrial frequency of 50 Hz, rated voltage up to 10 kV, and grounding off areas by means of earthing.

 

Options switch load VNA:

- load switch VNA-10/630-20-U3

- load switch VNA-10/630-20-C-U3 grounding one side

- load switch VNA-10/630-20-2H-U3 with earthing with 2 sides

- load switch WPSA-10/630-20-C-U3 with section fuse+grounding

 

The switches are designed (in conjunction with drive) for use in switchgear and control gear cabinets (Crewe), chambers of prefabricated one-sided service (CSR), cabinets complete transformer substations (CTS) and other electrical devices internal installation voltage class up to 10 kV three-phase AC frequency 50 Hz for systems with grounded and insulated neutral.

 

Technical data switches load VNA-10/630-20 U3:

 

1. Rated voltage, kV 10,

2. The highest working voltage, kV 12,

3. Rated current, And 630,

4. Rated tripping current at cos φ = 0,7, And 630,

5. Rated rated peak withstand current, kA 50,

6. Current thermal resistance for 1 s, kA 20,

7. Mechanical endurance, cycles

"the inclusion of arbitrary break - off" 2000

8. The initial effective value of a periodic

current component include, kA 20

9. The highest peak current switching, CA 41

10. Switching durability

"the inclusion of arbitrary break - off":

- at rated current 630 And 30*

- at rated current 400 And 30*

- at rated current 300 And 100*

* Without replacement cameras arc.

11. Own time, with no more than 0,15

12. The allowable number of cycles without revision

for different modes of operation:

1) Enable and disable nominal current at cosφ = 0.7 to 30

2) Enable and disable nominal current at cosφ = 0,3 10

3) Enable and disable 5% of the rated current at cosφ =0.7 to 20

4) Enabling and disabling the charging current of the cable is not less than 10 And,

the disable operation must occur after full fade transition

  part 10

5) Operation enable when most operating voltage

(12 kV) and current to. C. 20 kA (the amplitude of the 41 kA)** 2

6) disconnect Operation the charging currents of the cable with grounding

one of the phases of the load side 10

7) disconnect Operation the charging currents of the cable with grounding

one of the phases from the power source 10

8) Enable and disable current X. X. transformer (10) 20

** After the execution of operations under item 5 is revision switch

replacing cameras arc.

13. Electric strength test voltage

industrial frequency, RMS kV 42

14. The pulse voltage, the full amplitude of the pulse, kV 75

15. Weight(with one group of sasem. knives), kg 32

 

 

Load break switches are manufactured in accordance with TU U 31.2-34975929-001:2010 and THST 17717.