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    Purpose

Switching electric circuits at normal and emergency modes in three-phase AC
networks with frequency 50 Hz and voltage 10 kV with a neutral insulated or
grounded via an arcing ground suppressor or a resistor.
In the circuit-breakers there is applied a state-of-the-art structure of the arc
extinguish chamber made by Siemens Company with axial magnetic field materially
reducing wear and tear of contacts.


 






Specifications

 

 

Parameter

Circuit-breaker type1

ВВ-БЭМН-М-10-20/ХХХХУ3

ВВ-БЭМН-М-10-25/ХХХХУ3

ВВ-БЭМН-М-10-31.5/ХХХХУ3

Rated voltage, kV

10

10

10

Highest working voltage, kV

12

12

12

One-minute test voltage with frequency 50 Hz, kV

42

42

42

Rated current (ХХХХ), A

800; 1250; 1600

800; 1250; 1600

800; 1250; 1600

Rated interrupted current, kA

20

25

31,5

Opening time:

•     1st electric magnet (Y1), ms, not exceeding

•     2nd electric magnet (Y2), ms, not exceeding

 

60

45

 

60

45

 

60

45

Closing time, ms, not exceeding

60

60

60

Rated voltage of electric motor spring windup, V

= 220 or ~230

= 220 or ~230

= 220 or ~230

 

Circuit-breaker arrangement

•    Stationary

•    Pull-out:

- with a pull-out trolley

- with a pull-out trolley and contact system

Circuit-breaker weight, kg

57,5/77

57,5/77

57,5/77

Circuit-breaker service life, years

25

25

25

 1 In the Circuit-breaker designation: ВВ-БЭМН-10-ХХ/ХХХХУ3: ХХ — rated interrupted current, кА; ХХХХ — rated current, А.