Installation Depending On The System Earthing Arrangement (Sea); Ups With Common Normal And Bypass Ac Inputs - Eaton EX RT 7 Installationsaleitung

2. Installation

2.5 Installation depending on the system earthing arrangement (SEA)

EX RT must be fed from a 3-phase source with neutral.

UPS with common Normal and Bypass AC inputs

Main
low-voltage
switchboard
(MLVS)
Changement de SLT entre amont et aval ou isolation galvanique requis
Main
low-voltage
switchboard
(MLVS)
ASI avec réseaux d'entrée AC Normal et AC Bypass séparés
Main
low-voltage
switchboard
(MLVS)
Changement de SLT entre amont et aval ou isolation galvanique requis
Main
low-voltage
switchboard
(MLVS)
(*): The transformer is not necessary if:
Normal and Bypass AC inputs are connected to the same source,
z
and wires cross sections and wires lengths on Normal and Bypass inputs are identical,
z
and upstream protection is provided by only one switch with RCD (residual current device) for Normal
z
and Bypass inputs.
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Bypass AC
Normal AC
10
Bypass AC
11
10
Normal AC
Bypass AC
11
(*)
10
Normal AC
Bypass AC
11
(*)
10
Normal AC
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