Comments for The Power Protection Blog

Comment on A Requirement for Redundancy by toneus

toneus — Thu, 27 Aug 2009 10:45:25 +0000

Actually, further news (that the Taipei Government quicky denied) was that the outage was caused by somebody switching off the circuit. They thought they were switching off something else. Not a lot you can do when that happens really.

Comment on What are Square Wave Inverters Good For? by toneus

toneus — Sat, 07 Feb 2009 19:07:38 +0000

In terms of the transient bombardment of square wave inverters, the actual frequency of bombardment is probably higher, as you have a positive going transient (the leading edge) but also a negative transient (the falling edge), equally fast and equally as damaging. In a system that produces a positive square wave, then a negative wave, you will in effect have 4 transients per cycle – 200 per second!

Comment on Why Online Uninterruptible Power Supplies (UPS) are the best. by toneus

toneus — Tue, 23 Dec 2008 18:54:24 +0000

One other thing – when used in a standby power solution that incorporates a genset, it is advisable to use online double conversion technology. This is because these products are resilient to frequency changes and voltage fluctuations. Other technologies may result in the UPS not being able to sychronise with the generator and thus staying on, or regularly switching to, battery operation which will eventually diminish and may cause load failure.

Comment on Are we in the sh*t? New VAT Regulations. by upsmart

upsmart — Thu, 27 Nov 2008 16:17:15 +0000

And for those of you keen to know, we’ll take the product price, multiply it by 46 and then divide by 47. VAT is then added at 17.5%, which will be the same as adding 15% to the normal price. Just so everybody knows, this is a saving on the product price for a limited time!

Comment on Are we in the sh*t? New VAT Regulations. by upsmart

upsmart — Thu, 27 Nov 2008 09:03:20 +0000

Actually, we still need to charge VAT at 17.5% until 1 December, but we’ll do the maths when we charge your card so that you pay the equivalent of 15% VAT

Comment on Prevention better than cure in protecting healthcare power supplies by upsmart

upsmart — Wed, 26 Nov 2008 14:13:31 +0000

Powervar Power Conditioners, Power Conditioned UPS, including GroundGuard and Medical Grade are available to purchase online at http://www.upsmart.co.uk/shop

Comment on Not so Trust Worthy by upsmart

upsmart — Mon, 27 Oct 2008 23:05:40 +0000

PS: We don’t sell Trust systems

Comment on Medical UPS or Medical Grade UPS by toneus

toneus — Wed, 22 Oct 2008 02:24:57 +0000

Just another point to add to this, an interesting side effect of using medical grade ups systems is that the earth leakage of all connected equipment is in fact reduced to <300uA. This is because of the isolation transformer used to achieve the low leakage in the first place. I’ve seen this technique used so that hospitals can save money on expensive specialist PC hardware and instead opt for medical grade UPS (or power conditioner!) and standard PC & monitor.