Pro-MEC VCB

Vacuum Circuit Breakers

Pro-MEC VCB is user-friendly to give more convenience and safety by providing high speed interrupting time (3cycles), adopting the rapid auto-reclosing method, and having wide range of accessories.

  • General
    • High reliability of the operating mechanism
      • Separate design of the main circuit from the operating mechanism.
      • Adopt the toggle link method.
      • Improved the reliability of electric circuit.
      • Adopt the rapid auto-reclosing method as a standard option.
        (O-0.3sec.-CO-3min.-CO)
    • High interrupting performance
      • Make short of the interrupting time. (3cycles)
      • Increase the rated short-circuit withstand characteristics. (1sec. to 3sec.)
    • Great operational safety
      • Reinforce the insulation in the conduct, by adopting the molded housing in each phase.
      • Built in the device making the contacts open first when draw in and out.
      • Adopt the tulip-shape connection between the cradle and the VCB.
    Ratings
    • Rated voltage: 7.2kV, 12kV, 17.5kV, 24kV
    • Rated normal current: 630A, 1250A, 2000A, 2500A
    • Rated short-time withstand current: Max. 40kA
    Wide range of accessories (optional)
    Applied standard: IEC 62271-100 (M2, E2(List1), C2 class)
    Certification: KEMA, KERI
High reliability of the operating mechanism
  • Separate design of the main circuit from the operating mechanism.
  • Adopt the toggle link method.
  • Improved the reliability of electric circuit.
  • Adopt the rapid auto-reclosing method as a standard option. (O-0.3sec.-CO-3min.-CO)
High interrupting performance
  • Make short of the interrupting time. (3cycles)
  • Increase the rated short-circuit withstand characteristics. (1sec. to 3sec.)
Great operational safety
  • Reinforce the insulation in the conduct, by adopting the molded housing in each phase.
  • Built in the device making the contacts open first when draw in and out.
  • Adopt the tulip-shape connection between the cradle and the VCB.
Wide range of accessories (optional)
Comparison table for VCB (Short circuit test)
7.2kV Pro-MEC VCBs
7.2kV Pro-MEC VCBs
Type LVB-06=-20D LVB-06=-25D
Rated voltage (kV) 7.2 7.2
Rated normal current (A) 630 1250 2000 630 1250 2000
Rated frequency (Hz) 50/60 50/60
Rated short-circuit breaking current (kA) 20 25
Rated short-circuit breaking capacity (MVA) 250 310
Rated short-time withstand current (kA/3sec) 20 25
Rated short-circuit making current (kAp) 52 65
Rated breaking time (Cycle) 3 3
Rated opening time (sec) ≤ 0.04 ≤ 0.04
No-load closing time (sec) ≤ 0.06 ≤ 0.06
Withstand
Voltage
Power frequency (kV/min) 20 20
Impulse (kV/1.2×50㎲) 60 60
Rated operating sequence O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO
Type test Electrical M2 (10,000 times) M2 (10,000 times)
Mechanical E2 (List1) E2 (List1)
Capacitive current switching Note 1) C2 C2
Lifetime Maintenance Without maintenance (Time) 20000 20000
Maintenance (Time) 30000 30000
Electrical Without maintenance (Time) 20000 20000
Maintenance (Time) 30000 30000
Auxiliary switch 4a4b, 10a10b 4a4b, 10a10b
Type LVB-06=-32D LVB-06=-40D
Rated voltage (kV) 7.2 7.2
Rated normal current (A) 1250 2000 3150 1250 2000 3150
Rated frequency (Hz) 50/60 50/60
Rated short-circuit breaking current (kA) 31.5 40
Rated short-circuit breaking capacity (MVA) 390 500
Rated short-time withstand current (kA/3sec) 31.5 40
Rated short-circuit making current (kAp) 82 104
Rated breaking time (Cycle) 3 3
Rated opening time (sec) ≤ 0.04 ≤ 0.04
No-load closing time (sec) ≤ 0.06 ≤ 0.06
Withstand
Voltage
Power frequency (kV/min) 20 20
+ Product

Pro-MEC VCB

Vacuum Circuit Breakers

Pro-MEC VCB is user-friendly to give more convenience and safety by providing high speed interrupting time (3cycles), adopting the rapid auto-reclosing method, and having wide range of accessories.

+ Features
  • General
    • High reliability of the operating mechanism
      • Separate design of the main circuit from the operating mechanism.
      • Adopt the toggle link method.
      • Improved the reliability of electric circuit.
      • Adopt the rapid auto-reclosing method as a standard option.
        (O-0.3sec.-CO-3min.-CO)
    • High interrupting performance
      • Make short of the interrupting time. (3cycles)
      • Increase the rated short-circuit withstand characteristics. (1sec. to 3sec.)
    • Great operational safety
      • Reinforce the insulation in the conduct, by adopting the molded housing in each phase.
      • Built in the device making the contacts open first when draw in and out.
      • Adopt the tulip-shape connection between the cradle and the VCB.
    Ratings
    • Rated voltage: 7.2kV, 12kV, 17.5kV, 24kV
    • Rated normal current: 630A, 1250A, 2000A, 2500A
    • Rated short-time withstand current: Max. 40kA
    Wide range of accessories (optional)
    Applied standard: IEC 62271-100 (M2, E2(List1), C2 class)
    Certification: KEMA, KERI
+ Characteristics
High reliability of the operating mechanism
  • Separate design of the main circuit from the operating mechanism.
  • Adopt the toggle link method.
  • Improved the reliability of electric circuit.
  • Adopt the rapid auto-reclosing method as a standard option. (O-0.3sec.-CO-3min.-CO)
High interrupting performance
  • Make short of the interrupting time. (3cycles)
  • Increase the rated short-circuit withstand characteristics. (1sec. to 3sec.)
Great operational safety
  • Reinforce the insulation in the conduct, by adopting the molded housing in each phase.
  • Built in the device making the contacts open first when draw in and out.
  • Adopt the tulip-shape connection between the cradle and the VCB.
Wide range of accessories (optional)
Comparison table for VCB (Short circuit test)
+ Ratings
7.2kV Pro-MEC VCBs
7.2kV Pro-MEC VCBs
Type LVB-06=-20D LVB-06=-25D
Rated voltage (kV) 7.2 7.2
Rated normal current (A) 630 1250 2000 630 1250 2000
Rated frequency (Hz) 50/60 50/60
Rated short-circuit breaking current (kA) 20 25
Rated short-circuit breaking capacity (MVA) 250 310
Rated short-time withstand current (kA/3sec) 20 25
Rated short-circuit making current (kAp) 52 65
Rated breaking time (Cycle) 3 3
Rated opening time (sec) ≤ 0.04 ≤ 0.04
No-load closing time (sec) ≤ 0.06 ≤ 0.06
Withstand
Voltage
Power frequency (kV/min) 20 20
Impulse (kV/1.2×50㎲) 60 60
Rated operating sequence O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO
Type test Electrical M2 (10,000 times) M2 (10,000 times)
Mechanical E2 (List1) E2 (List1)
Capacitive current switching Note 1) C2 C2
Lifetime Maintenance Without maintenance (Time) 20000 20000
Maintenance (Time) 30000 30000
Electrical Without maintenance (Time) 20000 20000
Maintenance (Time) 30000 30000
Auxiliary switch 4a4b, 10a10b 4a4b, 10a10b
Type LVB-06=-32D LVB-06=-40D
Rated voltage (kV) 7.2 7.2
Rated normal current (A) 1250 2000 3150 1250 2000 3150
Rated frequency (Hz) 50/60 50/60
Rated short-circuit breaking current (kA) 31.5 40
Rated short-circuit breaking capacity (MVA) 390 500
Rated short-time withstand current (kA/3sec) 31.5 40
Rated short-circuit making current (kAp) 82 104
Rated breaking time (Cycle) 3 3
Rated opening time (sec) ≤ 0.04 ≤ 0.04
No-load closing time (sec) ≤ 0.06 ≤ 0.06
Withstand
Voltage
Power frequency (kV/min) 20 20