China GN19-12 Indoor High-Voltage Isolating Switch Factory & Suppliers for Reliable Power Solutions

Introducing the GN19-12(C) series indoor high-voltage disconnectors, a crucial component of power systems in China, designed for a rated voltage of 12kV and a frequency of 50Hz or less. Manufactured in our state-of-the-art factory, these disconnectors feature the 036-1 manual operating mechanism, allowing for seamless opening and closing of circuits under energized but no-load conditions. Our extensive range includes derivative products tailored for specific applications, such as anti-pollution types, high-altitude variations, and models equipped with live-line indicating devices, Ideal for a variety of environments, these disconnectors can operate effectively at altitudes of up to 1000m, in ambient temperatures ranging from -30℃ to +40℃, and with relative humidity levels of up to 90% at +25℃. Designed to withstand seismic intensities of up to 8, they are free from risks associated with fire, explosions, severe pollution, chemical corrosion, and intense vibrations. As a leading supplier in the industry, we ensure our products meet the highest standards of quality and reliability for your power system needs

Product Details

Type & Meaning

1	Disconnector
2	Indoor type
3	Design serial number
4	Rated voltage
5	Wall-through type
6	Rated current
7	Rated short-time withstand current (4s)

Model Description
- GN19-12: Flat-mounted type; GN19-12C: Wall-through type
- C1: Rotating side at wall-through side
- C2: Breaking side at wall-through side
- C3: Both sides are wall-through type
Derivative Model Description
- Anti-pollution type: GN19-12W(C)
- High-altitude type: GN19-12G(C)
- With live-line indicating device: GN19-12X(C)

Product Display

Technical Parameters

Model	Rated Voltage (kV)	Maximum Voltage (kV)	Rated Current (A)	4s Thermal Withstand Current (RMS) (kA)	Dynamic Withstand Current (Peak) (kA)
GN19-12/400-12.5	12	11.5	400	12.5	31.5
GN19-12/630-20	12	11.5	630	20	50
GN19-12/1000-31.5	12	11.5	1000	31.5	80
GN19-12/1250-40	12	11.5	1250	40	100
GN19-12C/400-12.5	12	11.5	400	12.5	31.5
GN19-12C/630-20	12	11.5	630	20	50
GN19-12C/1000-31.5	12	11.5	1000	31.5	80
GN19-12C/1250-40	12	11.5	1250	40	100

Outline and Installation Dimension

Model	A	B	C	D			E			F
GN19-12/400	450	436	4-14×24	210	230	250	620	660	700	870	900	940
GN19-12/630	470	436	4-14×24
GN19-12/(1000 or 1250)	500	530	4-18×28
GN19-C/400	420	625	4-14×24
GN19-C/630	420	680	4-14×24
GN19-C/(1000 or 1250)	505	745	4-18×28

Main Structure and Working Principle

The GN19-12 series disconnectors are available in flat-mounted (GN19-12) and wall-through (GN19-12C1) versions. Each phase of the GN19-12 conductive part is fixed to the base frame via two post insulators, while the GN19-12C1 uses one insulator and one porcelain bushing. Both types are installed in three parallel phases. The conductive part consists of contact blades and contacts; each contact blade is connected to the main shaft on the base frame via a tie rod insulator. The main shaft links to the CS6-1 operating mechanism through cranks and connecting rods, with a connecting rod (user-supplied) on the mechanism driving the auxiliary switch.

Each contact blade is made of two grooved copper plates, which increases heat dissipation area and mechanical strength, improving dynamic stability. Contact pressure is maintained by contact springs. The 1000A and 1250A versions have magnetic-locking plates at contacts to boost pressure, enhancing dynamic and thermal stability; 400A and 630A versions omit these plates due to lower current ratings and closer blade spacing. The CS6-1 mechanism has a self-locking device to hold the disconnector in open or closed positions.

Frequently Asked Questions (FAQ)

Q1: What is the difference between GN19-12 and GN19-12C?

GN19-12 is the flat-mounted type disconnector, designed for standard indoor panel installations. GN19-12C is the wall-through type, allowing the disconnector to pass through a wall partition, with variants C1 (rotating side through), C2 (breaking side through), and C3 (both sides through).

Q2: What rated current options are available for the GN19-12 series?

The GN19-12 series disconnectors are available in four rated current options: 400A, 630A, 1000A, and 1250A, covering a wide range of medium-voltage switchgear applications.

Q3: What is the rated voltage of the GN19-12 disconnector?

The rated voltage is 12 kV, with a maximum operating voltage of 11.5 kV. This makes it suitable for medium-voltage indoor switchgear applications.

Q4: Are there derivative models for special environments?

Yes. The GN19-12 series offers several derivative models: GN19-12W(C) for anti-pollution environments, GN19-12G(C) for high-altitude applications, and GN19-12X(C) for installations requiring a live-line indicating device.

Q5: Why do the 1000A and 1250A models include magnetic-locking plates while 400A and 630A do not?

The 1000A and 1250A versions carry higher currents and require greater contact pressure for enhanced dynamic and thermal stability. Magnetic-locking plates are added at the contacts to achieve this. The 400A and 630A versions operate at lower currents with closer blade spacing, making magnetic-locking plates unnecessary.

Q6: What operating mechanism is used with the GN19-12 disconnector, and how is the position maintained?

The GN19-12 disconnector is paired with the CS6-1 operating mechanism, connected via cranks and connecting rods. The CS6-1 mechanism incorporates a self-locking device that reliably holds the disconnector in either the open or closed position, ensuring safe and stable operation.