Hi Fabry!
Use of ultra isolation transformer of appropriate power
capacity at the input of UPS will remove all damaging power
spikes and surges. The transformer is designed in such a way
that output voltage will not rise unless the magnetic flux
rises more over the designed flux is very near to saturation
level, hence magnetic flux do not rise beyond saturation
level, secondly the surges and spikes are of very short duration and are
transferred to equipment due to capacitive coupling, in the isolation
transformer primary to secondary coupling capacitance is less than
0.00005 pf, which is sufficient to isolate spikes of million volts! One
has to take care in laying the cables of power line that primary and
secondary cables are totally isolated.
Isolation transformer also gives opportunity to ground neutral
on secondary of transformer to reduce the neutral voltage to
zero, which is requirement for most of the sophisticated
instruments.
Best Luck to avoid power glitches!
L S Mombasawala
NMR Laboratory,
SAIF, IIT Bombay
Maharashtra, India
__________________________________________________________________________
Hi All!
I am having power outage issues within our NMR facility. Our building is
connected to an old sub-station that often sends out powerful surges when
we transition from backup generator power to street power. We had our RF
amplifier destroyed from one of these surges. We have the NMR connected
to
an appropriate UPS but that does not provide enough protection.
Is there a better way to protect our NMR system as well as our other high
voltage equipment?
Thank you for your input! Cheers!
D. Fabry
Haverford College
Received on Thu Jul 09 2015 - 20:25:22 MST