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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSI 9000 15U/24U Series
2.3.5
Connection to DC loads
Connection to transformerless DC-AC inverters (for example solar inverters) is restricted, be
-
cause the inverter can shift the potential of negative output (DC-) against PE (ground). Refer
to section
„1.8.3. Technical specifications“
for the allowed max. potential shift.
The DC output is located on the rear side of the cabinet and is
not
protected by any kind of fuse. The cross sec
-
tion of the connection cables is determined by the current consumption, cable length and ambient temperature.
For cables
up to 5 m
of length and an average ambient temperature
up to 30°C
we recommend cross sections
per DC pole
(multi-conductor, insulated, openly suspended, standard cable) as listed in the table below. For
longer cables or higher ambient temperatures the cross section must be increased accordingly in order to avoid
high voltage loss and overheating.
The cables are usually crimped with ring lugs and are tightened to the connection point at the lower end of the DC
bus bars. The mounting hole diameter of the ring lug should match the one of the connection point. This restricts
the number of applicable cable cross sections, for example because a M8 ring lug can take a max. of 95 mm² or
150 mm², depending on the manufacturer of the ring lug. The number of cables which are required increases when
using a smaller cross section per cable, but the cables also become better manageable.
Rated power
I
Max
Connection points
Minimum required cross section per DC pole
30 kW
60 A
3x M8
1x 10 mm²
80 A
3x M8
1x 16 mm²
120 A
3x M8
1x 35 mm² or 2x 16 mm²
180 A
3x M8
1x 70 mm² or 2x 25 mm²
240 A
6x M10
1x 95 mm² or 2x 35 mm²
420 A
6x M10
2x 70 mm² or 3x 50 mm²
1020 A
6x M10
4x 95 mm² or 6x 50 mm²
45 kW
90 A
3x M8
1x 25 mm²
120 A
3x M8
1x 35 mm² or 2x 16 mm²
180 A
3x M8
1x 70 mm² or 2x 25 mm²
270 A
3x M8
2x 50 mm² or 3x 25 mm²
360 A
6x M10
2x 70 mm² or 3x 35 mm²
630 A
6x M10
2x 150 mm² or 3x 70 mm²
1530 A
6x M10
5x 120 mm² or 6x 95 mm²
60 kW
120 A
3x M8
1x 35 mm² or 2x 16 mm²
160 A
3x M8
1x 70 mm² or 2x 25 mm²
240 A
3x M8
1x 95 mm² or 2x 35 mm²
360 A
3x M8
2x 70 mm² or 3x 35 mm²
480 A
6x M10
2x 95 mm² or 3x 50 mm²
840 A
6x M10
3x 120 mm² or 4x 95 mm²
2040 A
6x M10
6x 150 mm² or 8x 95 mm²
75 kW
150 A
3x M8
1x 50 mm² or 2x 16 mm²
200 A
3x M8
1x 70 mm² or 2x 25 mm²
300 A
3x M8
2x 50 mm² or 3x 25 mm²
450 A
3x M8
2x 95 mm² or 3x 50 mm²
600 A
6x M10
2x 150 mm² or 3x 70 mm²
1050 A
6x M10
4x 120 mm² or 6x 50 mm²
2550 A
6x M10
8x 150 mm² or 10x 95 mm²
90 kW
180 A
3x M8
1x 70 mm² or 2x 25 mm²
240 A
3x M8
1x 95 mm² or 2x 35 mm²
360 A
3x M8
2x 70 mm² or 3x 35 mm²
540 A
3x M8
2x 120 mm² or 3x 70 mm²
720 A
6x M10
3x 95 mm² or 4x 70 mm²
1260 A
6x M10
4x 150 mm² or 6x 70 mm²
3060 A
6x M10
10x 150 mm² or copper bar with min. 720 mm²
