FZW28-12F Outdoor Vacuum Load Switch

Selection

Operating conditions

1. Altitude: ≤ 2000 meters; 2. Environment temperature: -40℃ ~+85℃; 3. Relative humidity: ≤ 90% (25℃); 4. The maximum daily temperature difference: 25℃; 5. Protection grade: IP67; 6. The maximum ice thickness: 10mm.

Technical data

Item	Unit	Parameter
The switch body
Rated voltage	kV	12
Power frequency insulation withstand voltage (Interphase and phase to ground / fracture)	kV	42/48
Lightning impulse withstand voltage (Interphase and phase to ground / fracture)	kV	75/85 (peak)
Rated current	A	630
Rated short-time withstand current	kA	20
Rated thermal stability time	S	2
Rated short-circuit close current (peak)	kA	40
Rated dynamic stability current (peak)	kA	40
Rated cable charging breaking current	A	20
Rated switching unloaded transformer inductor current	A	＜5
Mechanical life	Times	10000
Measurement and control unit
Type		FDR-100
Input voltage		AC220±20%
Input voltage frequency	Hz	50
The output voltage (opening operation)		DC48V
Interphase short-circuit protection setting current value		0.2-1.0 adjustable
Grounding protection of zero sequence current setting value		10-200mA adjustable
Grounding protection action time setting value		0-10s adjustable
Setting value permitted error		±5%
Insulation resistance (external terminal to    ground / input terminal to output terminal)		> 100MΩ/DC500V
Power frequency withstand voltage (ibid.)		2000V/1min
Impulse withstand voltage (ibid.)		5000V, 1.2/50μs The positive and negative three times each

Overall and mounting dimensions(mm)