© EA Elektro-Automatik in 2022, this information is subject to change without notice
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06230820_manual_psi_10000_3u_15kw_en_01
2.3.4
Connection to AC supply
•
Connection to an AC supply must only be carried out by qualified personnel and the device must always
be run directly on a power grid (transformer are permitted) and not on generators or UPS equipment!
•
Cable cross section must be suitable for the maximum input current of the device! See tables below. The
device should furthermore be fused externally and according to the current rating and cable cross section
All models and variants in this series support to run either on 380/400/480 V or also 208 V (US and Japan grids). When
running any with model on 208 V it would automatically switch into derated power mode in which the available DC power is
decreased to 3 kW (5 kW models), 6 kW (10 kW models) or 9 kW (15 kW models). This is detected every time when powering
the device, so that the same model could provide the full rated power when being run on 380/400/480 V.
2.3.4.1
AC supply requirements
No matter what particular variant the device is, standard, WC or Slave, the rated AC supply voltage on the type label is decisive.
They all use a regular three-phase supply without N. Specification:
Rated DC power
Inputs on AC plug
Supply type
Configuration
5 kW
at least L2, L3, (N), PE
Two/Three-phase (2P/3P) Delta
10 kW
L1, L2, L3, (N), PE
Three-phase (3P)
Delta
15 kW
L1, L2, L3, (N), PE
Three-phase (3P)
Delta
The PE conductor is imperative and must always be wired to the AC plug! There is furthermore a ground-
ing point beneath the AC filter box which is required to be connected to PE via a separate PE line for the
primary reason of grounding the enclosure in order achieve higher safety. As a secondary option it can
be used to ground one of the DC terminal poles.
2.3.4.2
Cross section
For the selection of a suitable cable
cross section
the rated AC current of the device and the cable length are decisive. Based
on the connection of a
single unit
the table lists the maximum input current and recommended minimum cross section for
each phase:
L1
L2
L3
PE
(1
Available DC power
ø
Imax
ø
Imax
ø
Imax
ø
5 kW (rated) at 380/400/480 V
3 kW (derated) at 208 V
-
-
≥ 1.5 mm²
(AWG14)
16 A
≥ 1.5 mm²
(AWG14)
16 A
≥ 1.5 mm²
(AWG14)
10 kW (rated) at 380/400/480 V
6 kW (derated) at 208 V
≥4 mm²
(AWG10)
28 A
≥4 mm²
(AWG10)
16 A
≥4 mm²
(AWG10)
28 A
≥4 mm²
(AWG10)
15 kW (rated) at 380/400/480 V
9 kW (derated) at 208 V
≥4 mm²
(AWG10)
28 A
≥4 mm²
(AWG10)
28 A
≥4 mm²
(AWG10)
28 A
≥4 mm²
(AWG10)
2.3.4.3
AC plug & AC cable
The included connection plug can receive cable ends from 0.5 mm² (AWG20) to 10 mm² (AWG8). The longer the connection
cable, the higher the voltage loss due to the cable resistance. Therefore the mains cable should be kept as short as possible
or have an even bigger cross section. Cables with 3, 4 or 5 conductors can be used. When using a cable with N conductor,
it’s allowed to clamp it into the spare pin of the AC plug. Ratings of the AC plug:
•
Max. cross section without cable end sleeve: 10 mm² (AWG8)
•
Max. wire cross section with cable end sleeve: 6 mm² (AWG10)
•
Stripping length without cable end sleeve: 18-20 mm (0.75 in)
•
Cable sleeve length: at least 12 mm (0.47 in)
1 Valid for both, the ground conductor in the AC cable and the separate PE line for enclosure grounding
