User Manual

Page 29
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
ELR 9000 Series
2.3.4 Mains connection (AC)
• Connection to an AC mains supply may only be carried out by qualied personnel.
• Cable cross section must be suitable for the maximum input/output current of the device (see
table below)
• Before plugging in the input plug ensure that the device is switched off by its mains switch
• Ensure that all regulations for the operation of and connection to the public grid of energy
back-feeding equipment have been applied and all necessary conditions have been met.
The equipment is delivered with a 5 pole mains plug. Depending on model, this will be connected with a 2-phase
or 3-phase mains supply, which has to be connected according to the description on the plug and the table below.
Required for the mains connection, with or without AIU (automatic isolation unit, monitoring the mains for correct
energy recovery), are following phases:
Without AIU With AIU
Nominal power Phase Supply type Phase Supply type
3500W L2, N, PE Wall socket L1, L2, L3, N, PE Three-phase
7000W L1, L3, N, PE Three-phase L1, L2, L3, N, PE Three-phase
10500W L1, L2, L3, N, PE Three-phase L1, L2, L3, N, PE Three-phase
>10500W L1, L2, L3, N, PE Three-phase L1, L2, L3, N, PE Three-phase
The N conductor is imperative and must always be wired!
If using an automatic isolation unit (AIU), all phases of a three-phase supply are required, be-
cause the mains monitoring feature of the AIU always monitors on three phases.
For the dimensioning of the wiring cross section the power of the device and the cable length are decisive. The
maximum output current of the energy back-feeding feature per phase is calculated by the formula I
AC
= Nominal
power * Efciency / 230V. The table below tells the maximum output current of every phase, as well as the recom-
mended minimum cross section.
Based on the connection of a standalone unit:
L1 L2 L3 N
ø I
max
ø I
max
ø I
max
ø I
max
3500W - - 1.5mm² 16A - - 1.5mm² 16A
7000W 1.5mm² 16A - - 1.5mm² 16A 1.5mm² 16A
10500W 1.5mm² 16A 1.5mm² 16A 1.5mm² 16A 1.5mm² 16A
The included connection plug can receive cable ends of up to 4mm². The longer the connection cable, the higher
the voltage loss due to the cable resistance. If the voltage loss is too high then the feedback will not function reli-
ably or not at all. Therefore the mains cables should be kept as short as possible.
Figure 7 - Mains cable (not included)