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China GN30-12 Series Indoor HV Rotary Disconnect Switch Suppliers and Factory for 10kV Power Systems
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China GN30-12 Series Indoor HV Rotary Disconnect Switch Suppliers and Factory for 10kV Power Systems

The GN30-12 Series is a high-quality indoor rotary disconnect switch designed for 10kV, 50Hz AC power systems in China. As trusted suppliers and manufacturers, our factory produces this innovative switch featuring a rotating contactor equipped with upper and lower insulators, ensuring reliable circuit isolation during no-load conditions. For versatile applications, an optional earthing knife version (GN30-12M) is available to meet the varying needs of power systems. With its compact design, robust insulation, and straightforward installation process, the GN30-12 Series is ideal for high voltage switchgear cabinets and standalone distribution configurations, making it a preferred choice among industry professionals
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    Product Details

    Technical Specification
    Item GN30-12/400-12.5 GN30-12/630-20 GN30-12/1000-31.5 GN30-12/1250-31.5
    GN30-12D/400-12.5 GN30-12D/630-20 GN30-12D/1000-31.5 GN30-12D/1250-31.5
    Rated Voltage (KV) 12
    Rated Current (A) 400 630 1000 1250
    Rated Short-time Withstand Current (KA) 12.5 20 31.5
    Rated Short-circuit Duration (S) 4
    Rated Peak Withstand Current (KA) 31.5 50 80
    Rated Insulating Level Lightning Impulse Withstand Voltage (KV) Phase to phase / to earth: 75  |  Across open contacts: 85
    1 min. PF Withstand Voltage (KV) Phase to phase / to earth: 42  |  Across open contacts: 48
    Product Model
    GN30-12 Product Model
    Dimension
    GN30-12 Dimension Drawing
    GN30-12 GN30-12D/1250
    400A   630A 1000A 1250A 400A   630A 1000A 1250A
    A C A C A C A B C A B C A B C
    ~560 ~315 ~580 ~332 ~580 ~295 ~550 ~610 ~240 ~575 ~615 ~245 ~580 ~600 ~295
    Frequently Asked Questions
    Q What is the rated voltage of the GN30-12 series indoor high-voltage disconnect switch?
    The GN30-12 series is designed for a rated voltage of 12 KV, making it suitable for indoor medium-voltage power distribution systems.
    Q What rated current options are available for the GN30-12 series?
    The GN30-12 series is available in four rated current options: 400A, 630A, 1000A, and 1250A, covering a wide range of power distribution requirements.
    Q What is the difference between the GN30-12 and GN30-12D models?
    The GN30-12D is a variant of the standard GN30-12 model. Both share the same rated voltage, current, and short-circuit withstand parameters, but differ in their dimensional configuration (notably the B-dimension), making the GN30-12D suitable for different installation space requirements.
    Q What is the rated short-time withstand current and duration for the GN30-12/1000-31.5?
    The GN30-12/1000-31.5 has a rated short-time withstand current of 31.5 KA with a rated short-circuit duration of 4 seconds, and a corresponding rated peak withstand current of 80 KA.
    Q What are the insulation withstand voltage levels for the GN30-12 series?
    For lightning impulse withstand voltage, the phase-to-phase and phase-to-earth level is 75 KV, and across open contacts is 85 KV. For 1-minute power frequency withstand voltage, the phase-to-phase and phase-to-earth level is 42 KV, and across open contacts is 48 KV.
    Q How should I select the correct GN30-12 model based on installation dimensions?
    Refer to the dimension table and drawing provided above. Key dimensions (A, B, C) vary by current rating and model variant (GN30-12 or GN30-12D). For example, the GN30-12/400A–630A has dimensions A≈560mm and C≈315mm, while the GN30-12D/1250A has A≈580mm, B≈600mm, and C≈295mm. Always verify available cabinet space before selection.