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Paul,
I understand, there will be no kick when the Landis controller turns off, but there will be a kick sometimes when the mechanical timer turns off. If the mechanical timer's contacts are in parallel with the zero-crossing switch in the Landis controller, perhaps the zero-crossing switch could be damaged when the mechanical timer's switch opens.
>>> PH <pholzsc yahoo com> 8/28/2006 3:34:03 PM >>> The Landis uses a "zero-crossing" SS relay so there
should be no "kick". Thanks, Paul Holzschuher --- Bob Murcek <rmurcek geisinger edu> wrote: > Mr. Landis would obviously be the best source of > info, but if the Landis controller uses a > solid-state switch of some kind rather than a relay > to control the charger, your switch to turn off > power to the Landis controller might be really > important to keep the switch in the Landis > controller from being blown out by the inductive > kick when the mechanical timer turns off. > > >>> "Raymon Ellis" <raymonellis adelphia net> > 8/28/2006 2:39:00 PM >>> > This is for those who have experienced timer > problems and are looking for a simpler charger > setup. Michael J. Banks wrote that he fixed his > timer after opening it and all the switch parts fell > out in his hand. He is a champion and I salute him. > I took mine apart and found it impossible to > reassemble. Today a standard 12 hour auto shut-off > mechanical timer was installed to straddles the > newly installed Landis controller to override the > Landis when the batteries are very low. This may be > the answer for anyone willing to risk it. An in-line > fuse and single pole switch was inserted in the red > wire to the Landis to stop power while the > mechanical timer is in control although this may not > be necessary. When the timer was first turned on > this morning the power meter showed a current draw > of slightly over 8 amps. After a few minutes the > current reduced to 4.6 amps. All seems well now, but > the big test will come later this week when we mow > the lawn and run down the batteries. The ability to > charge 6 or 8 hours with the mechanical timer > followed by the Landis method for unattended > surveillance ought to be just what the doctor > ordered. The power usage record should prove the > practical advantages of the setup. Maybe. > > > > > IMPORTANT WARNING: The information in this message > (and the documents attached to it, if any) is > confidential and may be legally privileged. It is > intended solely for the addressee. Access to this > message by anyone else is unauthorized. If you are > not the intended recipient, any disclosure, copying, > distribution or any action taken, or omitted to be > taken, in reliance on it is prohibited and may be > unlawful. If you have received this message in > error, please delete all electronic copies of this > message (and the documents attached to it, if any), > destroy any hard copies you may have created and > notify me immediately by replying to this email. > Thank you.> _______________________________________________ > Elec-trak mailing list > Elec-trak cosmos phy tufts edu > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elec-trak mailing list Elec-trak cosmos phy tufts edu https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak |