Yes, you can get stabilisers for your entire home. A 5KVA unit will pretty much power everything including a couple of airconditioners, though it is generally advised to separate lighting and power lines at the meter junction, and stabilise the lighting line only. A single 2KVA stabiliser should be enough for pretty much everything connected to that line. For the power line it is advised to separately regulate each appliances. Simple resistive appliances such as geysers do not need a stabiliser at all, whereas anything with a motor or coil requires a reasonably stable (190-260V) supply. The problem is not the voltage, but the fluctuation. So if you get anything above 200v and it stays stable, you should be fine. A UPS switching into battery mode for a few seconds is not an issue, but a 230V compressor running off 180V may burn it out. Most appliances are OK with about 10% fluctuation (that is 207-253v) so it’s not as big a problem as you would probably think.
A good 5KVA unit will cost in the region of 16-18K, and may guarantee ultimate peace of mind. Do not connect a geyser to it though, those things can kill a stabiliser. Also remember motors can draw up to 2x their rated power at switch-on, so get a unit that can take a bit of overload.
Inverters usually have a wide input voltage range, they just pass the mains voltage without any kind of AVR,only after say 270v they just switch to Battery mode.
But a UPS on the other hand will do AVR,so one should look at a UPS like APC SUA3000UXI which can handle a load of 2700watts which means one can run a normal water heater(but not the instant type) and a fridge and a large size lcd tv .but UPS are very sensitive to sudden demand of the load,like for eg if one switches a 21" CRT tv in my 1000VA model , the ups trips indicating a overload ,despite the fact that it can handle 7times the load of the tv,this only happens in a cold start.
again in a UPS the load shouldn’t exceed the rated output of the UPS even when its running on mains unlike a inverter.
thanks for all the info guys,
so now, options are to get a servo or get 2 stabilizers for the fridge and home entertainment equipments.
Since a servo is really heavy and huge, i think i will stick to 2 stabs option
What are the recommended stabilizers for Refrigerator and TV equipments.
Can we use automatic stabilisers (those with the relays) instead of the servo stab? These are much cheaper than the servo ones. I have one such (500VA) with my refrigerator and I face no problems in 10 years. I have serious voltage fluctuations at my home and it does its job fine on keeping the output within 200-230V range.
we r using 3kva stabilizer at home works absolutely fine and for fridge we use diff. stab of .5kva.As we use gas geyser so we don’t need stab for that.
Use stab according to your load connection,like we have 2Kva load connection.
I’m using a normal Vertex 5KV auto stabilizer, powering everything except a couple of ACs which are powered by their own 5Kv stabs. Voltage here drops to 80~90 in the evenings. The lower the input voltage, the higher the prices would be. So take readings of how low your voltage drops to on average before spending on the stab.
bought a multimeter yesterday and tested the voltages in my house. Its a 3 phase connection and 1 phase was giving only 190 V. And at night, it even dropped to 150V for a while. My computer and laptops are connected to this phase.
