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i had severe power problems for many years and did a lot of research in to surge protection. pretty much all the consumer grade surge protection devices are worthless. the only thing good would be if they really do honor the protected equipment replacement insurance they offer but the devices themselves are almost worthless. they are based on MOV technology and usually have in adequate sizes and types of these to do anything other than protect form minor transients. they can also have noise filtering which can be helpful but it is not surge protection. also, when MOVs are stressed, they gradually fail and there is no way to know if they are still capable of doing anything other than by destructive testing.

the power company fixed the problem that as causing the surges. it turned out that they needed to spend a few million dollars replacing the distribution system in my area. i actually won against PG&E which is almost unheard of.

in the meantime i installed an industrial quality whole house protector that has something like 200 times the energy absorbing ability of a standard power strip type protector. i am actually on my second such unit because one surge destroyed the first one.

i also discovered that the Panamax surge protectors that have the feature they call "protect or disconnect" are vastly superior to other devices. they have a deadman relay that keeps the load connected and if the input is over or under the design limits or if there is a high voltage transient, the relay is released protecting the connected load and also the MOVs. so the MOVs are much less likely to be stressed. these strips protect against brownout conditions as well.

Best regards, Spencer Chase
67550-Bell Springs Rd.
Garberville, CA 95542 Postal service only.
Laytonville, CA 95454 UPS only.
21220 92nd Place W., Edmonds, WA 98020
Spencer@...
Spencer@...
Spencer@mcn.org
http://www.spencerserolls.com
http://www.poodlex.com
(425) 791-0309
(707) 223-8212

------ Original Message ------

From: "Charles Lau charleslau@... [disklavier]" <disklavier@yahoogroups.com>

To: disklavier@yahoogroups.com

Sent: 9/24/2016 1:30:50 PM

Subject: Re: [disklavier] Power Failure

--------------------------------------------
On Sat, 9/17/16, markbevingtonsmith@...m [disklavier] <disklavier@yahoogroups.com> wrote:

Subject: [disklavier] Power Failure [1 Attachment]
To: disklavier@yahoogroups.com
Date: Saturday, September 17, 2016, 1:34 AM

When I spoke with tech support about my MarkIV PSU problem they said always have it plugged into a surge protector.

You can buy these on Amazon for example
https://www.amazon.com/Belkin-BE112230-08-12-Outlet-Surge-Protector/dp/B000J2EN4S/ref=sr_1_3?ie=UTF8&qid=1474748885&sr=8-3&keywords=surge+protector+power+strip

[Attachment(s) from
markbevingtonsmith@... [disklavier] included
below]

Hi Everyone,
I have a Disklavier MKIIXG (1999) that
has just died. I have had a quick check round the PSU
modules and have found that the 4A fuse (circled in the
attached photo) has blown. Does anyone know what may have
caused this? Also is this fuse a normal or quick blow type
before I order some? The piano was being used in silent
mode on last operation and switched off as normal. Also as
the silent mechanism stepper motor is still in the hammer
blocking position so I need to release the cable for normal
piano operation. Is there a correct way to release this
without power? Many thanks for any help.

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Re[2]: [disklavier] Power Failure

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