Heinzinger electronic GmbH
Phone: +49 (0) 8031 2458 0
www.heinzinger.com
Anton-Jakob-Str. 4, 83026 Rosenheim
Fax: + 49 (0) 8031 2458 58
Germany
Page 45
ERS COMPACT
2.3.6
Connection to DC loads or DC sources
• In the case of a device with a high nominal DC current and hence a thick and heavy DC
connection cable it’s 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 could hang on the DC terminal, a strain reliever should be used.
•
Due to the construction, the device will always draw a small current of
≤
0.1% I
Nom
when
being connected to an external source and while the DC input is switched off!
No false polarity protection inside! When connecting sources with false polarity the device
will be damaged, also when not powered!
The DC terminal is located on the rear side of the device and is
not
protected by a fuse. The cross section of the
connection cable is determined by the current consumption, cable length and ambient temperature.
For cables
up to 5 m
(16.4 ft) and average ambient temperature
up to 30°C
(86 °F), 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 supply 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.