Table of Contents
Advertisement
S
AFETY TESTS
The tests described below should be performed after the UPS is completely closed with the wrapping and all the panels. In
addition, all operations must be carried out with the UPS off and completely disconnected from the mains, batteries and any other
equipment.
▪
Equipment required
1.
Earth resistance meter, fitted with RS28 ELEKTROTECHN Laboratorium electrodes (or similar).
2.
UH28 .. ELEKTROTECHN LABORATORIUM strength test instrument complete with high voltage rectifier BRIDGE
adapter (or similar).
▪
Measurement of contact resistance to earth (CRITICAL FOR SAFETY)
Connect one electrode from the "RS 28" generator to the earth terminal. Inject the test current through the other electrode
(tip) in all the different parts that make up the metal frame. In the test on painted frames, before the test, pierce the painted
layer with the tip.
The test is passed if all the metal parts of the equipment are earthed.
The earth resistance reading on the instrument should be 0.1 Ohm.
▪
Strength test (CRITICAL FOR SAFETY)
With the UPS off and disconnected from the mains, batteries and any other equipment, short circuit the mains input terminals
(L1, L2, L3, N) (and bypass input terminals if present).
Close all the disconnectors SWIN, SWOUT, SWBATT (if present on the UPS), and SWMB and SWBYP (if present). With
the machine for the strength test and relative rectifier bridge, set at 1500Vac with a 10mA limit, apply a voltage of about
2100Vdc for at least 2 seconds between the short circuit created beforehand and an earth terminal.
The test is passed if the test equipment gives no indication of an anomaly.
Remove the short circuit between the phases and the neutral. Open all the disconnectors.
- MST / MSM / MCT / MCM -
ALL OPERATIONS DESCRIBED IN THIS CHAPTER MUST
ONLY BE CARRIED OUT BY PERSONNEL WHO ARE
QUALIFIED AND PROPERLY TRAINED
CAUTION
11
Advertisement
Table of Contents
