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 Loss of power - Friday, 23rd October, 2015
 Return to top of page · Post #: 1 · Written at 20:06 on 21 September 2015.
's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 4375

Due to the need for a power pole replacement on the site where the host server for Vintage Radio & Television is located there will be a loss of power for up to four hours on Friday, 23rd October whilst this work is carried out.

The servers and associated equipment is set to automatically restart when power is restored so the downtime will be limited to the duration of the electrical work. The UPS will carry the load for a short time though it ultimately does not have the capacity to do this for the length of time required by the supply authority to complete their work.

UPDATE: This work has been completed.


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Brad.

A valve a day keeps the transistor away...


 Return to top of page · Post #: 2 · Written at 20:34 on 21 September 2015.
's avatar
 GTC
 Location: Sydney, NSW.
 Member since 28 January 2011.
 Member #: 823
 Postcount: 3973

Thanks for the notification.

(I have to respond in order to clear the "You have unread front page forum posts" flag.)


 Return to top of page · Post #: 3 · Written at 09:10 on 23 September 2015.
ZScan's Gravatar
 Location: Oradell, US.
 Member since 2 April 2010.
 Member #: 643
 Postcount: 619

I think most UPSs have an output that tells the computer that the power has failed, and the computer would then do an orderly shutdown. Here in the USA, power company substation circuit breakers attempt to automatically reclose the circuit after a second or so, As most short circuits are caused by things like tree branches or squirrels. And that get burned off, allowing power to continue after a reclose cycle. If the short is bolted hard enough, the recloser cycles about 3 times and then gives up. Which means that you'd want to wait about 15 seconds after the initial power loss event to decide that the power isn't coming back soon, and thus do the orderly shutdown. I imagine Australian power companies do thing like this.


 Return to top of page · Post #: 4 · Written at 15:59 on 23 September 2015.
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 Administrator
 Location: Greenwich, NSW.
 Member since 15 November 2005.
 Member #: 1
 Postcount: 4375

Yes, reclosers have been standard equipment for a long time, typically decades as they allow power restoration after strong winds cause aerial conductors to 'splash' together.

The power pole being replaced though is a private one and the power being supplied to it will be isolated at a pole in the street.

I have not put the safe shutdown into effect here as this mode would override the 'wake on power' function, which in this case is a higher priority.


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Brad.

A valve a day keeps the transistor away...


 Return to top of page · Post #: 5 · Written at 20:54 on 24 September 2015.
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 Administrator
 Location: Greenwich, NSW.
 Member since 15 November 2005.
 Member #: 1
 Postcount: 4375

Due to Sydney's inclement weather at present, this work is now postponed. A further notice will be placed here when a new date has been arranged.


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Brad.

A valve a day keeps the transistor away...


 Return to top of page · Post #: 6 · Written at 18:16 on 21 October 2015.
's avatar
 Administrator
 Location: Greenwich, NSW.
 Member since 15 November 2005.
 Member #: 1
 Postcount: 4375

The work on the power pole described in the original post will take place on the morning of Friday, 23rd October. The work is likely to take up to four hours so there is a good chance that there will be a period of two to three hours where this site will not be accessible.

The servers are programmed to restart without intervention once power is made available again so once the work is done the site should once again be accessible.


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Brad.

A valve a day keeps the transistor away...


 Return to top of page · Post #: 7 · Written at 01:06 on 22 October 2015.
's avatar
 GTC
 Location: Sydney, NSW.
 Member since 28 January 2011.
 Member #: 823
 Postcount: 3973

Hope the current rainy weather stays away for the second attempt.


 Return to top of page · Post #: 8 · Written at 01:25 on 22 October 2015.
's avatar
 Location: Latham, ACT.
 Member since 21 February 2015.
 Member #: 1705
 Postcount: 899

You know I witnessed a powerpole being taken down by a ten year old boy and a soccer ball. He kicked his ball up to the power lines and one broke free. The servo I was working at stopped functioning for about 6 hours while the lineys went to repair the cable and found that the entire pole was about to come down by its self. Considering the pole was on the servo premises I was very lucky.


 Return to top of page · Post #: 9 · Written at 07:43 on 22 October 2015.
's avatar
 Administrator
 Location: Greenwich, NSW.
 Member since 15 November 2005.
 Member #: 1
 Postcount: 4375

White ants and dry rot will do that. This pole is in much the same state and to make matters worse it has been spiked at some stage to prolong it's life and in my view this is a waste of money as the only thing that is prolonged at the end of the day is the inevitable need for pole replacement.


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Brad.

A valve a day keeps the transistor away...


 Return to top of page · Post #: 10 · Written at 15:55 on 23 October 2015.
's avatar
 Administrator
 Location: Greenwich, NSW.
 Member since 15 November 2005.
 Member #: 1
 Postcount: 4375

This work has now been completed.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
Brad.

A valve a day keeps the transistor away...


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