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MASTERYS BC 100-120 kVA - Ref.: IOMMASBCXX07-EN 05
ENGLISH
2.5.1-1
2. UNPACKING AND INSTALLATION OF THE UNIT
2.5.1. Backfeed protection
The UPS is set up for the installation of external protection devices against the backfeed of dangerous voltages, on both the input
power supply line (MAINS SUPPLY) and on the auxiliary backup mains power supply line (AUX MAINS SUPPLY); these devices
are controlled by means of the card shown in fi gure 2.5.1-1.
In the event that the equipment does not have a voltage protection device, warning labels must be attached to all mains power
disconnectors installed away from the UPS area, in order to remind support personnel that the circuit is connected to a UPS (see
also paragraph 1.1 of this manual and paragraph 4.5.3 of standard EN62040-1 2009-05). The label is supplied with the equipment.
If under certain irregular conditions, or due to the installation upstream (e.g. undetected and protected earth fault, or high leakage
in a phase, or with IT systems) there is a hazardous potential on neutral, a suitable isolating switch must be provided on the neutral
as well, or else there must be a detection, signalling and protection system (see the table in section 2.5 Electrical requirements).
Connections, refer to paragraph 2.6.5.
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