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

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

General Description

Model DH1(VS1)‑12P Series Solid‑Encapsulated Indoor Vacuum Circuit Breaker is applied in three‑phase power systems with rated voltage 12 kV and frequency 50 Hz, used as protective and control apparatus. Thanks to the superior performance of vacuum circuit breakers, it is especially suitable for occasions requiring frequent operations under rated current or repeated short‑circuit‑current interruption.

DH1(VS1)‑12 Series Solid‑Encapsulated Indoor 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.

Environmental Conditions

The main insulation of this product adopts solid insulation. The vacuum interrupter is integrally cast inside an epoxy resin insulating cylinder. This structure greatly improves the insulation performance of the product, and meets environmental requirements such as high‑humidity and high‑altitude conditions.

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    Outline and Installation Dimension Drawing
    Outline and Installation Dimension Drawing

    No. Item Unit Value
    1 Rated Voltage kV 12
    2 Rated Power Frequency Withstand Voltage (1 min) kV 42/48 (Phase-to-earth / Across open contacts)
    3 Rated Lightning Impulse Withstand Voltage (Peak) kV 75/85 (Phase-to-earth / Across open contacts)
    4 Rated Frequency Hz 50
    5 Rated Current A 630, 1250 / 630, 1250, 1600 / 630, 1250, 1600, 2000, 2500, 3150
    6 Rated Short-circuit Breaking Current kA 20/25 / 31.5 / 40
    7 Rated Short-time Withstand Current kA 20/25 / 31.5 / 40
    8 Rated Short-time Withstand Duration s 4
    9 Rated Peak Withstand Current kA 50/63 / 80 / 100
    10 Rated Short-circuit Making Current (Peak) kA 50/63 / 80 / 100
    11 Secondary Circuit Power Frequency Withstand Voltage (1 min) V 2000
    12 Rated Single Capacitor / Back-to-back Capacitor Bank Breaking Current A 630/400 (40kA: 800/400)
    13 Rated Capacitor Bank Switching Current A 12.5 (Frequency ≤1000Hz)
    14 Mechanical Life Operations 20000
    15 Rated Current Breaking Operations (Electrical Life) Operations 20000
    16 Rated Short-circuit Current Breaking Operations Operations 50 (40kA ≤30)
    17 Contact Overtravel mm 3
    18 Energy Storage Time s ≤10
    19 Contact Opening Distance mm 9±1
    20 Contact Stroke mm 3.5±0.5
    21 Contact Closing Bounce Time ms ≤2 (40kA ≤3)
    22 Three-phase Closing/Open Synchronism ms ≤2
    23 Average Closing Speed (Contact Opening 8mm) m/s 1.1±0.2
    24 Average Opening Speed (8mm Contact Closing) m/s 0.6±0.2
    25 Main Circuit Resistance μΩ ≤50 (630A) ≤45 (1250A) / ≤40 (1600,2000A) / ≤35 (2500A and above)
    26 Rated Operating Sequence O-0.3s-CO-180s-CO