Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Using generators

Using generators

Using generators

Has anyone ever plugged the UPS into a generator and is this safe for the networking devices attached to the UPS?  Generators will not provide a steady current, but I think the UPS will regulate that for the servers and such.  For example a house generator that's about 7500 Watt.


RE: Using generators

Generators will provide steady current but they must be maintained and exercised including the transfer switch. Other thingd to consider is what kind of voltage regulator the generator uses. A electronic vr will maintain steady current, mechanical regulator ie: the govenor on the engine tends to have some problems. These problems include not holding a steady rpm, not taking a load.

Regular house/business current from the power company is not steady voltage at all. Around here it tends to fall in a 10-15 volt range around the 120v mark.

RE: Using generators

I have many sites where each PC is connected to a UPS which is then connected to a voltage regulator.  The voltage regular is connected to the wall plug.  The wall plug is linked to a transfer switch.  The transfer switch has one side connected to the utility and the other to a generator.  It works very well but it doesn't cause premature use of the UPSes.  The regulators are must because when the generator quicks in, the voltages get pretty hight.  On these sites, they have VERY VERY frequent power brownouts and power failures.  For the sites in the cities of Africa, it's not uncommon to hear the UPS kick in 10 times a day when the weather is nice, never mind when it rains...  In the jungles of Africa, there's no utility so the generator runs 24hrs a day...  Man am I glad to be in North America !

RE: Using generators

I apologize for the greek.

One of the biggest problems with small portable generators is the mechanical governor on the engine. This piece regulates engine speed. All generators must run at a steady speed to provide propper output. The governor helps regulate this speed but also allows the engine to accept increased load without increased rpm. The best explanation I can give is walking on a treadmill, with the treadmill flat you can walk easily without expending much energy, raise the incline of the treadmill and to maintain the same speed you expend more energy. This is how the governor works it allows the engine to accept the load without bogging down or dieing.
    Another problem with mechanical governors is a tendency to (pardon the term) jackoff. this is where the engine revs up and down and never settles into a steady rpm. This plays hell with the voltage regulator and anything plugged into the generator.

   If you are looking for a home or small business back up    I would look at a small Kohler or Onan unit.

Unless Kohler has changed one of their units would be the choice.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close