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DH1(VS1)-12C Indoor High‑Voltage Vacuum Circuit Breaker

DH1(VS1)-12C Indoor High‑Voltage Vacuum Circuit Breaker

General Description

Model DH1(VS1)‑12C Side‑Mounted Vacuum Circuit Breaker is indoor high‑voltage switchgear. It is applied in three‑phase power systems with rated voltage 12 kV and frequency 50 Hz, serving as protective and control apparatus.

Thanks to the superior performance of vacuum circuit breakers, it is especially suitable for locations requiring frequent operations under rated current or repeated short‑circuit current interruption.

Model DH1(VS1)‑12C side‑mounted vacuum circuit breaker adopts fixed‑type installation, mainly for fixed‑type switch cabinets. This circuit breaker can be used standalone, and also applicable for ring‑network power supply, box‑type transformers and various non‑standard power supply systems.

    Preview Data Contact us
    Outline and Installation Dimension Drawing
    Outline and Installation Dimension Drawing

    No. Item Unit Value
    1 Rated Voltage kV 12
    2 Maximum Operating Voltage kV 12
    3 Rated Current A 630/1250 ; 630/1250 ; 630/1250/1600
    4 Rated Short-circuit Breaking Current kA 20 ; 25 ; 31.5
    5 Rated Short-circuit Making Current kA 50 ; 63 ; 80
    6 Rated Peak Withstand Current kA 50 ; 63 ; 80
    7 Rated Short-time Withstand Current (4s) kA 20 ; 25 ; 31.5
    8 Rated Insulation Level kV
    Power Frequency Withstand Voltage (1 min) 42 (Across Open Contacts: 48)
    Lightning Impulse Withstand Voltage 75 (Across Open Contacts: 85)
    9 Rated Operating Sequence O-0.3s-CO-180s-CO
    10 Mechanical Life Operations 20000
    11 Rated Short-circuit Breaking Operations Operations 50
    12 Rated Closing Coil Voltage (DC) V 110, 220
    13 Rated Opening Coil Voltage (DC) V 110, 200
    14 Contact Opening Distance mm 11±1
    15 Contact Overtravel (Contact Compression Length) mm 3.5±0.5
    16 Three-phase Closing Synchronism Time ms ≤2
    17 Three-phase Opening Synchronism Time ms ≤2
    18 Average Closing Speed m/s 1.1±0.2
    19 Average Opening Speed m/s 0.6±0.2
    20 Opening Time s
    Maximum Operating Voltage ≤0.05
    Minimum Operating Voltage ≤0.08
    21 Closing Time s 0.1
    22 Main Circuit Resistance μΩ 60 / 50
    23 Contact Allowable Wear Thickness mm 3