According to IEC61643-11, Type 1 surge protective device should be tested by 10/350μs waveform and Type 2 SPD should be tested by 8/20μs waveform.
10/350μs waveform is a surge which reaches peak value at 10μs and it reduces to half of peak current at 350μs. Take BR-25GR type 1 SPD as an example, the product was tested at waveform which reach 25kA in 10μs which reduces to12.5kA at 350μs.
As comparison, 8/20μs waveform is a surge which reaches peak value at 8μs and reduces to half of peak current at 20μs. Take BR-40 type 2 SPD as an example, this product was tested at waveform which reach 40kA in 8μs which reduces to 20kA at 20μs.
As you can see from the above picture, 8/20μs waveform has much shorter time than the 10/350μs waveform. As energy equals to current square multiplied by resistor and time (E=I2Rt) and the time difference between the two wave is very big, therefore, a type 1 25kA SPD can discharge much more energy than a type 2 40kA SPD.
Contact Person: Macy Jin
Tel: 0577-62605320
Fax: 86-577-61678078
BR-40 3P Surge Protector Device Three Phase Spd Lightning Arrester 200kA
BR-40 3P+1 Surge Protection Protector Device Lightning Arrester Protection 18mm surge protector
BRPV3-600 Photovoltaic 600v DC Surge Protection Device solar spd lightning protection
BRPV3-1000 40KA DC SPD Surge Protection Device Solar Photovoltaic Lightning Arrester
Reliable PV Surge Arrester House Surge Protector Easy Installation
BRPV3 T1 Lightning PV Surge Arrester 10 / 350 Us Lightning Impulse Current
IP20 PV Surge Arrester No Leakage Current -40 To 80 ℃ Temp CE Approved
Thermalplastic PV Surge Arrester UL94 - V0 Type 1+2 Lightning Protection