Purchased a 4 KVA digital stabilizer of V-Guard make yesterday.
Referred to the threads in here, but could not make much out .... between advantages of CVT, Servo Stabilizer or simple digital stabilizer .... just too many parameters ... some people preferring some feature to others ... so, could not decide.
Ended up applying my own logic and went ahead.
Selected stabilizer model VD 400 (4 KVA). It is a 12 A one, meant for a 1.5 TR air-conditioner. You see, the starting current required by the AC is pretty huge, in a 1.5 Tr machine, it is to the tune of 10 A ... which falls to 6-7 A, when the operation gets normalised, say after 10 minutes.
The 12 A stabilizer ... would have 12 x 220 = 2640 W capacity ... and my peak load, if all operate (never possible) is @ 1100 W. So, just need never bother about the highs during 'Saving Private Ryan' type movies, laced with frequent AVR 'peaks' to accomodate the machine gun rattles and mortar shell bursts.
BTW, my entire HT / accessories is put through this 4 KVA stabilizer. In operation since last night ... and noticed a single auto cut-off when there was a momentary steep voltage drop. Yes, this model HAS a low-high voltage cut off (range 150 V - 280 V). The line resumption happens the moment the voltage comes back to the 'range' levels.
Unlike a simple automatic stabilizer, could not hear the 'relay' jumping sound during the fluctuation period .... though, this needs to be observed carefully at a later opportune time. The transition seemed stepless and smooth.
I played my Norge Amp full night at low volume and did not find any hint of warmth on the stabilizer body this morning .... this has no relevance, but, still reporting. So, for a place with mild fluctuations, this kind of outfit looks to be a good match.
Costed me Rs. 2900 with bill and 3 year warranty.