GN19-12 · GN19-12C

Indoor high-voltage disconnector

Indoor disconnectors for AC networks of 12 kV and below, 50 Hz. Operated by a CS6-1 manual mechanism to open and close energised circuits under no-load conditions; version C is a wall-bushing type.

Key parameters

Rated voltage: 12 kV
Rated current: 400; 630; 1000; 1250 A
Short-time withstand current (4 s): 12.5 … 40 kA
Operating mechanism: manual, CS6-1

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General information

GN19-12 series indoor disconnectors are high-voltage switching apparatus for 50 Hz AC power systems with a rated voltage of 12 kV and below. Together with the CS6-1 type manual operating mechanism, they are intended for closing and opening circuits that are energized but not under load.

Derived versions are also available: with enhanced pollution resistance, for high-altitude areas, and with a built-in voltage presence indicating device.

Type designation

G N 19 – 12 / (C) / x – x

G	Disconnector
N	Indoor
19	Design serial number
12	Rated voltage, kV
(C)	Wall-bushing (through-wall) version
x	Rated current, A
x	Rated short-time (thermal) withstand current, kA

Service conditions

Altitude: not more than 1000 m.
Air temperature: −25 °C … +40 °C.
Relative humidity: daily average ≤ 95 %, monthly average ≤ 90 %.
Seismic intensity: not more than 8 degrees.
Installation site: free from fire hazard, flammable and explosive substances, severe pollution, chemical corrosion and severe vibration.

Main technical parameters

Model	Rated voltage, kV	Rated current, A	Short-time withstand current (4 s), kA	Peak withstand current, kA
GN19-10(C)400-12.5	12	400	12.5	31.5
GN19-10(C)630-20	12	630	20	50
GN19-10(C)1000-31.5	12	1000	31.5	80
GN19-10(C)1250-40	12	1250	40	100

Overall and mounting dimensions (mm)

Fig. 1 — GN19-12 series; Fig. 2 — GN19-12C series. Right — terminal contacts for 400, 630 and 1000/1250 A versions.

Model	A	B	C	D
GN19-12/400	450	446	185	4-14×24
GN19-12/630	470	446	185	4-14×24
GN19-12/1000/1250	510	500	196	4-18×28
GN19-12C/400	420	690	185	4-14×24
GN19-12C/630	430	690	185	4-14×24
GN19-12C/1000/1250	470	745	196	4-18×28

Installation diagrams of the disconnector with the CS6-1 operating mechanism

**Option 1.** 1 — auxiliary switch; 2 — connecting lever; 3 — CS6-1 type operating mechanism; 4 — rod; 5 — crank; 6 — pull-rod insulator; 7 — disconnector. Below — hole layout for the auxiliary switch and operating mechanism (not less than 300 mm); dimension A: Fr-4 — 90, Fr-6 — 120, Fr-8 — 150 mm. Distance to the handle — not less than 150 mm.

**Option 2.** 1 — disconnector; 2 — crank; 3 — rod; 4 — operating mechanism. Height of the disconnector above the floor — not less than 2500 mm, of the operating mechanism — about 1200 mm; distance to the handle — not less than 150 mm.

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