VF(R)-12 Wbudowany wysokonapięciowy próżniowy przełącznik obciążenia AC

Overview of VF(R)-12

VF(R)-12 is a kind of indoor embedded high voltage AC vacuum load switch-fuse combination device. It is suitable for various power grids and operates safely and stably within its technical parameters. With advanced design, this device is widely used in modern power systems.

Standard produktu

VF(R)-12 Vacuum load switch conforms to the following standards:

GB 3804-2004: High-voltage load AC switches with rated voltage between 3.6 kV and 40.5 kV.
GB 16926-2009: Standard for high-voltage load AC switch-fuse combinations.

Parametry techniczne

Pozycja	Jednostka	Wartość odniesienia
		VF-12/T630-20 Vacuum load switch	VFR-12/T125-50 Vacuum load switch-fuse combination	VFH-12/T630-25 High breaking capacity vacuum switch	VFHR-12/T125-50 High breaking capacity vacuum switch-tuse combination
Rated yoltage	kV	12	12	12	12
napięcie wytrzymywane impulsu błyskawicy	kV	75	75	75	75
Rated insulation level 1min power-frequency withstand voltage	kV	42	42	42	42
Rated frecuency	Hz	50/60	50/60	50/60	50/60
Prąd znamionowy	A	630	125(fuse)	630	125(fuse)
Znamionowy prąd zwarciowy	kA		50(fuse	25(are suppreson chamber)	25im pcesson harx
Znamionowy prąd zwarciowy (wartość szczytowa)	kA	50		63
Znamionowy krótkotrwały prąd wytrzymywany	kA	20		25
Znamionowy prąd wytrzymywany (wartość szczytowa)	kA	50		63
Rated breaking current of cable during charge	A	16
Rated breaking current of no-load transformer	kVA	1250		1250
Rated breaking take-over current	A		3150		3150
Breaking times of the rated short-circuit current	Czasy
Żywotność mechaniczna		Poziom M2	M2 leve	M2 leve	Poziom M2
Waga	kg	125

Operating conditions

Ambient temperature: -40°C to +40°C (less than 35°C within 24 hours)
Relative humidity: ≤95% (daily average), or ≤90% (monthly average)
Wysokość: ≤1000 metrów

Transformer and fuse selection

Fuses have the ability to cut off high currents in less than 10 milliseconds and have a breaking capacity of up to 50KA, which makes them effective in protecting transformers. When selecting fuses, it is important to consider that the fuse current needs to be 1.6 times its rated value to cope with potential inrush currents. The designer should also allow a margin for the fuse, taking into account the fluctuations in the grid. If the fuse is to be used for high voltage motor protection, consideration should also be given to the frequency of motor start-ups, as frequent start-ups may result in the fuse not being able to cool down in time and thus failing.

Fuse Selection

Napięcie pierwotne transformator (kV)	Pojemność the transformer(kVA)	Model bezpiecznika		Prąd znamionowy of the fuse(A
		Model dla rynku krajowego	Model dla rynku międzynarodowego
6.6	200	XRNT-10	12kV BDGHC	31.5
	250			40
	300/315			50
	400		12kV BDGHC	63
	500			80
	630			90

Wymiary całkowite i instalacyjne

Całkowity wymiar wewnętrznego wyłącznika próżniowego wysokiego napięcia prądu przemiennego VF(R)-12 (na kółkach)

Szerokość obudowy (mm)	P(mm)	A(mm)	B(mm)	C(mm)	E(mm)	φW(mm)
650	150	500	530	490	203	35
800	210	650	680	640	278	35
1000	275	850	880	840	378	35