These bursts of overvoltage can be measured with specialized electronic meters that can show power disturbances of thousands of volts amplitude that last for a few microseconds or less.
42.
The other two UPS systems functioned correctly, surviving the overvoltage, probably due to an undetermined subtle difference in wiring or equipment between the two pairs of units.
43.
:If that device can tolerate such overvoltage, it will work ( although it will heat up more ) ( it also might reduce it's lifespan ).
44.
The battery can still be charged while " bucking " an overvoltage, but while " boosting " an undervoltage, the transformer output is too low to charge the batteries.
45.
If that device cannot tolerate such overvoltage, it will either blow fuse or it will get damaged .-talk ) 09 : 57, 12 February 2008 ( UTC)
46.
Additional features such as monitoring of power consumption, noise and overvoltage filtering, environment monitoring and remote management are generally the same as in North American rack-based PDUs.
47.
In order to make defective units obvious, glass units are designed with Class B construction, so that an overvoltage causes a puncture arc through the glass instead of a flashover.
48.
The overvoltage caused failure of the control circuitry of two of the four redundant UPS systems which supplied the safety critical equipment at the plant, including cooling pumps and control circuitry.
49.
Two types of overvoltage protection devices are currently used : clamping, which passes through voltages up to a certain level, and foldback, which shunts voltage away from the load.
50.
Now the remaining ones have 4.2 % overvoltage etc . The remaining bulb continue to fail, and after 5 have failed they remaining ones are at 11 % overvoltage.
