Sir, could you please explain what these are and how to install these?
Search for voltage cutout in amazon. You will get many such devices at different price points. Most of these are Made in Taiwan. Before these came into the market you had what is known as 'home protectors'. These desi home protectors have a small preset which you can adjust using a screw driver. I think if you buy the protector, the manufacturer installs the same in your house. This will be an extra box besides your existing electrical distribution box.
You have to get an electrician to fit it into your exising distribution board. It is of the standard size (unlike the domestic home protectors).
It is simple to connect. You have two terminals where the input power is connected. The output is connected to two output terminals. Using few buttons you can configure the low voltage value and high voltage value. You can also set the recovery time after a fault happens. These cutouts are of standard size of equpment that are installed in the distribution box. So if you have spare space in your existing electrical distribution box it can be fitted inside.
I will list down what I lost in the same year that covid happened. Mostly it will be your power supply unit in your precious equipment that will blow. If you have vintage equipment, most of them were designed for 220 v and some for 240 v. Be double careful with vintage equipments because you will not get spares easily.
These are what conked off around the covid pandemic and after the pandemic before I protected myself using cutouts and stabilizers throughout the house
1. Computer SMPS (looked at it and found SMPS had blown. Replaced the SMPS myself from cooler master). This was my HTPC which ran perfectly since 2007.
2. Yamaha AVR (Found the SMPS TOP 254 IC had blown). Fixed it myself in less than Rs 100. Yamaha official service center said the approximate cost to repair it would be above Rs 25 k. Now this is something I want all of you to be aware of. This will be applicable to lot of AVRs, subwoofers, etc all of which have SMPS inside. AVRs like Marantz, Denon use the same IC. The heart of all such SMPS is an IC like TOP254. The max voltage for these SMPS is 265 volts. With the new standards being implemented, the max voltage that you can get is 240 + 10% = 264 volts. This is dangerously close to 265 volts max voltage tolerated by these SMPS ICs. For all you know that voltage very well could go little above 264 volts when you are sleeping peacefully. This I believe is the reason for many of our FM loosing subwoofers and AVRs and TV sets.
3. Allo Shanti LPS (luckily it was the fuse that blew)
4. Zero B RO filter (I looked at it and found the SMPS had blown)
5. iphone power adaptor (these adaptors are actually SMPS)
