FZN25/FZRN25-12 Indoor Vacuum Load Switch

Selection

Operating conditions

1. Ambient air temperature: upper limit +40℃, lower limit -25℃ (allow storage at - 30℃), 24h average value is not higher than +35℃; 2. Altitude: no more than 1000m; 3. Relative humidity: daily average value is not greater than 95%, monthly average is not greater than 90%; 4. Earthquake intensity: do not exceed 8 degree; 5. The surrounding air is not corrosive and flammable gas,steam and other significant pollution; 6. No regular violent vibration; 7. Contamination grade: II class;

Technical data

Item	Unit	FZN25-12D/ T630-20	FZRN25-12D/ T125-20
Voltage, current parameters
Rated voltage	kV	12
Rated frequency	Hz	50
Rated current	A	630	125
Rated short time power frequency withstand voltage (1min)	kV	Interrupter fracture 30; phase to earth 42; isolation fracture 48
Rated lightning impulse withstand voltage (peak)	kV	Phase to earth 75; isolation fracture 85
Rated peak withstand current	kA	50	-
4s rated short-time withstand current	kA	20	-
Rated active load breaking current	A	630	-
Rated loop breaking current	A	630	-
Rated cable charging breaking current	A	10	-
Interrupting no load transformer capacity	kVA	1250	-
Rated short-circuit breaking current	kA	-	31.5
Rated transfer current, rated AC current	A	-	2000
Fuse type			SDLAJ-12 SFLAJ-12
The impactor energy output	J		2-5 (medium)
Rated short-circuit closing current	kA	50
Grounding switch rated stability current	kA	50
Grounding switch 2S thermal stability current	kA	20
The auxiliary circuit rated voltage	V	≌220/110
Mechanical life	Times	10000

Outline and mounting dimensions