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EPS Stromversorgung GmbH
Alter Postweg 101 • 86159 Augsburg
Germany
Fon: +49 821 / 570451-0
Fax: +49 821 / 570451-25
www.eps-germany.de
PSI 10000 4U Serie
2.3.6
Connection to DC loads
In case the device has a high nominal current and hence thick and heavy DC connection ca
-
bles are used it becomes necessary to take account of the weight of the cable and the strain
imposed on the DC connection. Especially when mounted in a 19” cabinet or similar, where the
cable hangs on the DC output, a strain reliever should be used.
The DC output terminal is on the rear side of the device and isn
’t
protected by a fuse. The cross section of con-
nection cables is depending on the current consumption, cable length and ambient temperature.
For cables up to 1.5 m and average ambient temperature up to 50°C, we recommend:
up to
40 A
:
6 mm²
up to
60 A
:
16 mm²
up to
80 A
:
25 mm²
up to
120 A
:
35 mm²
up to
180 A
:
70 mm²
up to
240 A
: 2x 35 mm²
up to
420 A
:
2x 95 mm²
up to
1000 A
: 3x 185 mm²
per connection pole
(multi-conductor, insulated, openly suspended). Single cables of, for example, 70 mm² may
be replaced by e.g. 2x 35 mm² etc. If the cables are long then the cross section must be increased to avoid voltage
loss and overheating.
2.3.6.1
DC terminal types
The table below shows an overview of the various DC terminals. It’s recommended that connection of load cables
always utilizes flexible cables with ring lugs.
Type 1: Models up to 200 V
Type 2: Models from 360 V
M10 bolt on a metal rail
Recommendation: ring lug with a 11 mm hole
M6 bolt on a metal rail
Recommendation: ring lug with a 6.5 mm hole
2.3.6.2
Cable lead and plastic cover
Models from 360 V rating and with type 2 DC terminal have a plastic cover for contact protection included. It should
always be installed. There are breakouts so that the DC cable can be laid in various directions.
The connection angle and the required bending radius for the DC cable must be taken into
account when planning the depth of the complete device, especially when installing in a 19”
cabinet or similar installations.
