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Home > Products > Indoor HV Vacuum Circuit Breaker > Zn28-12k Fixed Type of Indoor High Voltage Vacuum Circuit Breaker

Zn28-12k Fixed Type of Indoor High Voltage Vacuum Circuit Breaker

Basic Info

Model No.:  ZN28-12K

Product Description

Model NO.: ZN28-12K Operation: Electric Type Arc-extinguishing Medium: Vacuum Structure: ACB Type: Circuit Breaker Certification: VDE, ISO9001-2000, CE, CB, CCC Rated Current: 630/1250/1600/2000/2500/3150A Trademark: Longxiang Electric Origin: China Baoji Breaking Capacity: High Voltage Circuit Breakers Speed: High-Speed Circuit Breaker Installation: Fixed Poles Number: 3 Function: Circuit-Breaker Failure Protection Rated Voltage: 12kv Rated Frequency: 50/60Hz Specification: IEC: M2-E2-C2 HS Code: 85389000 ZN28-12K Fixed Type of Indoor High Voltage Vacuum Circuit Breaker

General Description
 ZN28A-12 fixed type indoor HV vacuum breaker is used for many kinds of Switchgear like XGN2-12(Z).It is widely used for 12kV voltage systems which is accordance with GB1984-2003 standards Structural characteristics:
1.This vacuum circuit breaker adopts air insulation ,it can meet air distance and creepage under nomal run condition.
2.The operating mechanism can use CD17or CT19 type mechanism,the outlet curve has good adaptation for the requirements of vacuum interrupters.It has high reliable with characteristic of long life and easy maintenance.
3.Convenient for matching with switchgear;convenient and reliable operation:compulsive mechanical interlock way is adopted:meet the "Five Preventions"function.
 
  Applying ambient conditions
 1.Ambient temperature:-15~+40ºC.
2.The height above sea level:≤1000m(besides the special requirements).
3.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%.
4.Saturated vapor pressure:the average pressure of a day should be no more than 2.2kPa:the  average pressure of a month should be no more than 1.8kPa.
5.Earthquake intensity:not exceed 8 degrees.
6.It should be installed in the places without fire,explosion,serious filth, chemical erosion and violent vibration.

  Main Technical Specification
S.N Name Unit Data
1 Rated voltage kV 12
2 Rated frequency Hz 50/60
3 Rated current A 630 630   1250   1600
1000 1000 1600 2000
1250 1250 2000 2500



3150
4 Rated short circuit breaking current    kA   20    25    31.5    40
5 Rated peak withstand current    kA   50    63     80    100
6 Rated short-circuit duration     s                             4
7 Rated power frequency withstand voltage Between phases,
phase to  ground
   kV                            42
Between gaps    kV                            48
8 Rated lightning impulse withstand voltage Between phases,
phase to ground
   kV                             75
Between gaps    kV                             85
9 Rated operating sequence
O-0.3s-CO-180s-CO
O-180s-CO-180s-CO(40kA)
10 Rated source voltage of opening and closing circuit    V ~220/-110;-220/110
11 Rated breaking current of single capacitor bank    A                            630
12 Rated breaking current of bank to bank capacitor bank    A                            400
13 Electrical endurance class Cycle                              30
14 Mechanical endurance Cycle                           10000
15 Operating mechanism type
CD17I CD17II CD17II CD17III
CT19I CT19I CT19I CT19II
16 Clearance between open contacts mm 11±1
17 Contact stroke of contacts   mm 4±1
18 Out simultaneity of CO operation of three poles   ms ≤2
19 Contact bouncing duration at closing operation   ms ≤2
20 Closing time    ms 50~100
21 Opening time    ms 20~60
22 Average closing speed    m/s 0.6±0.2
23 Average opening speed    m/s 1.1±0.2
24 Main circuit resistance of each pole    μΩ ≤40 ≤40    ≤40    ≤30
25 DC component
                      50%(Max.)

  Overall outline drawing
Zn28-12k Fixed Type of Indoor High Voltage Vacuum Circuit Breaker
 
Zn28-12k Fixed Type of Indoor High Voltage Vacuum Circuit Breaker
 
Zn28-12k Fixed Type of Indoor High Voltage Vacuum Circuit Breaker
 
 
 
 
  
 

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