| | | | | | | | Vacuum arc-extinguishing chambers | Vacuum arc-extinguishing chambers  The vacuum arc-extinguishing chambers (VAC) are the core elements of vacuum switchgear and vacuum contactors. The VAC-based vacuum switchgear/contactors are environment-friendly and very reliable equipment, where the extinguishment of electric arc is made on the account of the contactors' moving within the high ambient vacuum (under 10-5÷10-6 mm of mercury column). The vacuum-based arc-extinguishment enables the development of switching/commutation equipment intended for coal-mining, chemical, and petroleum industries. Such equipment can also find application in the public utilities and related areas. Nowadays, Generator State-run Company serially produces two types of the high-voltage VAC. Simultaneously, the company is currently preparing to start manufacture of two new types of the high-voltage VAC as well as four new types of the low-voltage VAC. All of these devices have been developed by Generator on the basis of national patents and do not yield to the respective foreign-made similar products. | Technical properties | Main technical properties | Currently made on serial basis | Scheduled for serial manufacture | | KDVH 10-20/1600 | KDVM 10-20/1600 | KDVP 10-25/2500 | KDVP 10-20/1600 | KDV 10-20/1600 | KDV 10-12,5/1000 | KDV 1,14-400 | KDV 1,14-250 | KDV 1,14-160 | | Nominal voltage of industrial frequency, KV | 10 | 10 | 10 | 10 | 10 | 10 | 1,14 | 1,14 | 1,14 | | One-minute-long testing voltage, KV | 42 | 42 | 42 | 42 | 42 | 42 | 10 | 10 | 10 | | Nominal current, A | 1600 | 1600 | 2500 | 1600 | 1600 | 1000 | 400 | 250 | 160 | | Nominal breaking current, KA | 20 | 20 | 25 | 20 | 20 | 12,5 | 5,1 | 3,2 | 3,0 | | Endurance under short circuit through current: | | | | | | | | | | | - electrodynamic (maximum amplitude current), KA ; | 51 | 51 | 64 | 51 | 51 | 32 | 6,0 | 5,6 | 4,2 | | - thermal (efficient current), KA | 20 | 20 | 25 | 20 | 20 | 10 | 3,2 | 3,0 | 2,4 | | Switching endurance & switching cycles: | | | | | | | | | | | - under nominal current; | 50 thsd. | 50 thsd. | 30 thsd. | 50 thsd. | 50 thsd. | 55 thsd. | 2 mln. | 2 mln. | 2 mln. | | - under nominal breaking current | 100 | 100 | 50 | 100 | 100 | 120 | 0,15-106 | 0,25-106 | 0,5-106 | | Transient contact resistance, not exceeding, micro Ohm | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | | Devices' own contact thrust, N | 120 | 120 | 120 | 120 | 120 | 120 | 75 | 45 | 35 | | Supplementary contact thrust, N | 1200 | 1200 | 2000 | 1200 | 1200 | 800 | 20 | 20 | 15 | | Moving contact travel, mm | 8 | 8 | 8 | 8 | 8 | 6 | 2 | 2 | 2 | Dimensions, mm:
- height
- diameter |
240
106 |
240
106 |
210
95 |
180
95
|
180
96
|
250
85
|
125
66
|
105 56 |
95
46 | | Weight, not exceeding, kg | 4,0 | 3,8 | 2,2 | 2,0 | 2,5 | 2,5 | 0,7 | 0,5 | 0,3 |
Ежедневная прочистка мозгов - функция государства.
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