121
DELPHYS MX ELITE
250-900 kVA
Connection to the mains power supply and to the load(s) must be made using cables of suitable size, in accordance with current
standards. If not already present, an electrical control station which can isolate the network upstream of the UPS must be installed.
This electrical control station must be equipped with a circuit breaker (or two, if there is a separate bypass line) of an appropriate
rating for the power draw at full load, and a residual current circuit breaker.
Current flowing to earth varies depending on the size of the UPS, therefore installation engineers must install a residential current
circuit breaker of an appropriate rating upstream of the UPS using a selective model (not sensitive to transitory currents).
Potential dispersion of current from utilities downstream of the UPS should be added to that discharged from the UPS, and it should
also be noted that current peaks are also reached, albeit very briefly, during transitory phases. It is recommended to isolate the
residual current circuit breaker by adding 30mA protection downstream of the UPS on power lines to utilities.
We also recommend checking first for any earth leakage current with an uninterruptible power supply installed and running at the
final load to prevent any untimely tripping of the breakers.
If an external manual bypass is required, only the model supplied by the manufacturer must be installed.
See the relevant table for the data on the cable size and safety devices required.
For detailed information, see the installation and operating manual.
4. INSTALLATION REQUIREMENTS AND PROTECTION
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