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2. Surge protector - Wikipedia

   en.wikipedia.org/wiki/Surge_protector

   A little battery charger might include a MOV of only 1 watt, whereas a surge strip will have a 20 watt MOV or several of them in parallel. A house protector will have a large block-type MOV. Some manufacturers commonly design higher joule-rated surge protectors by connecting multiple MOVs in parallel and this can produce a misleading rating.

3. Joule thief - Wikipedia

   en.wikipedia.org/wiki/Joule_thief

   The battery voltage is usually 1.5 V. The resistor is ~1 kΩ, 1/4 W. The transistor could be a 2N3904, BC547B, 2SC2500, BC337, 2N2222, 2N4401 or other NPN. V ceo = 30 V, P= 0.625 W. A closed-loop regulated joule thief The waveform of an operating joule thief, showing a 30% duty cycle at approximately 40 kHz

4. Talk:Surge protector - Wikipedia

   en.wikipedia.org/wiki/Talk:Surge_protector

   Such protectors will survive about 10 average 20,000 amp lightning strikes, 400 surges of 2000 amps, or the one typically extreme surge. Protectors start at 1000 joules to survive multiple lightning surges or survive the extreme surge. A 200 or 400 joules protector is too small to protect from one average lightning surge. The www.tripplite.com ...

5. These UPS Battery Backups Do a Lot More Than a Regular Surge ...

   www.aol.com/ups-battery-backups-lot-more...

   Best UPS Battery Backups. Best Overall: CyberPower CP1500AVRLCD3. Best Budget: Amazon Basics Standby UPS 600VA. Most Outlets: CyberPower CP1500PFCLCD. Most Advanced: APC BR1500MS2. Best Compact ...

6. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   The offline/standby UPS offers only the most basic features, providing surge protection and battery backup. The protected equipment is normally connected directly to incoming utility power. When the incoming voltage falls below or rises above a predetermined level the UPS turns on its internal DC-AC inverter circuitry, which is powered from an ...

7. IEC 61000-4-5 - Wikipedia

   en.wikipedia.org/wiki/IEC_61000-4-5

   It necessitates the test of surge immunity in electrical or electronic equipment. IEC 61000-4-5 defines test set-up, procedures, and classification levels. In particular, it standardizes the required surge voltage and current waveforms for laboratory testing, with the "1.2/50-8/20 μs" impulse being the most frequently used surge waveform.