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Vacuum-circuit :
   12KV VACUUM CIRCUIT BREAKER : ZN12 (VS1-12)

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General Description

ZN12 (VS1012) series of vacuum circuit breaker is three-phase A.C 50Hz indoor high-voltage distribution device with 12kV rated voltage and below which 12kV rated voltage voltage and below which can match with GZSI type cubical switchboard. It is suitable to control and protect transmission and distribution system such as power generation plant and substation, especially used in the fields where it is frequently operated.
The operation mechanism of this series of circuit breaker is that of spring energy-stored type which can be operated by A.C or D.C., also by manual control.

  • Applying Ambient Conditions
    The elevation should be no higher than 1000m.

  • Ambient Temperature
    The max. temperature should be +40¡É
    The min. temperature should be -10¡É

  • Relative Humidity
    The average humidity of a day should be no more than 95%
    The average humidity of a month should be no more than 90%

  • Saturated Vapor pressure
    The average saturated vapor pressure of a day should be no more than 2.2x10-3Mpa
    The average saturated vapor pressure of a month should be no more than 1.8x10-3Mpa

    It should be used in the places without fire, explosion, serious filth, chemical erosion and violent vibration.
Rated voltage Rated power frequ-
ency with-
stand voltage		 Rated lighting impulse with-
stand voltage		 Rated short circuit brea-
king current		 Rated short circuit making current Rated dur-
ation
of
short circuit		 Rated switc-
hing opera-
tions		 Mech-
anical Endur-
ance		 Rated current (A)
1250 1600 2000 2500 3150 4000
kV kV kV kA kA s ¡¡ ¡¡ ¡¡ ¡¡ ¡¡ ¡¡ ¡¡ ¡¡
12 42 75 20 50 4 30 20000 ¡Ü ¡¡ ¡¡ ¡¡ ¡¡ ¡¡
12 42 75 25 63 4 30 20000 ¡Ü ¡¡ ¡¡ ¡¡ ¡¡ ¡¡
12 42 75 31.5 80 4 30 20000 ¡Ü ¡Ü ¡ã ¡ã ¡¡ ¡¡
12 42 75 40 100 4 30 20000 ¡¡ ¡¡ ¡¡ ¡ã ¡¡ ¡¡
  ¡Ü : Products available   ¡ã : Products to be developed

Because Reliance corp. owns nowadays advanced modern producing measures, the vacuum interrupter and the operating mechanism can match optimumly with all the circuit breakers fitted with the vacuum interrupters manufactured by Reliance corp. itself.

The circuit breaker especially uses vacuum interrupter with longitudinal magnetic field to ensure that it possessed high switching capability and cut-off capability. therefore making the circuit breaker reach higher technical specification within smaller space.

High quality products can be produced by adopting modern manufacturing methods and high quality material. Optimized design of each small part for the circuit breaker has fully taken into consideration the requirements of domestic applying conditions and national standards.

This series of circuit breaker adopts the most advanced domestic operating mechanism. It can optimumly pass its energy by accurately controlling the drive force, ensuring its property and service life.

The circuit breaker is noted for its compact construction, small size, light weight and beautiful appearance.

The circuit breaker is exempt from maintenance. It needs no adjustment even if it is frequently operated

It has a variety of specifications, which can meet many uses.
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1 Rated Short circuit breaking current kA 20  31.5  40
2 Rated Short circuit making current kA 50  80  100
3 Rated Short time withstand current kA 20  31.5  40
4 Rated withstand current (peak) kA 50  80  100
5 Rated Duration of short time s 4
6 Rated switching operations of short circuit  current ¡¡ 30
7 Mechanical endurance ¡¡ 20000
8 Closing time ms ¡Â75
9 Opening time ms ¡Â65
10 Switching current for single capacitor bank A 630
11 Switching current for back to back capacitor bank A 400
12 Rated voltage for energy-stored generator V DC220,110  AC220,110
13 Closing Voltage V DC220,110  AC220,110
14 opening Voltage V DC220,110  AC220,110
15 Power for Opening and closing coil w 245
16 Overall Dimension (width x depth x height) mm 588 x 429 x 563
17 Weight kg 100



    
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1304, Kumkwang Benesta,1149-2, Jung-Dong, Wonmi-Gu,
Bucheon-city, Gyeonggi-do 420-020, KOREA