User manual

Page 23
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
EL 3000 B Series
Standing surface (handle in -45° position)
2.3.4 Connection to DC sources
• When using the model which is rated for 60 A, attention has to be paid to where the source
is connected on the DC input terminals. The front 4mm banana plug hole is only rated for
max. 32 A!
• Connection of voltage sources which can generate a voltage higher than 110% nominal of
the device model is not allowed!
• Connection of voltage sources with reversed polarity is not allowed!
The DC load input is on the front 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 and average ambient temperature up to 50°C, we recommend:
up to 10 A: 0.75 mm² (AWG18) up to 25 A: 4 mm² (AWG10)
up to 60 A: 16 mm² (AWG4)
per lead (multi-conductor, insulated, openly suspended). Single cables of, for example,
16 mm² may be replaced by e.g. 2x 6 mm² etc. If the cables are long then the cross sec-
tion must be increased to avoid voltage loss and overheating.
2.3.4.1 Possible connections on the DC input
The DC input on the front is of type clamp & plug and can be used with:
• 4 mm system plugs (Büschel, banana, safety) for max. 32 A
• Spade lugs (6 mm or bigger)
• Soldered cable ends (only recommended for small currents up to 10 A)
When using any type of lugs or cable end sleeves, only use those with insulation to
ensure electric shock protection!
2.3.5 Grounding of the DC input
The device can always be grounded on the DC minus pole, i.e. can be directly connected to PE. The DC plus pole,
however, if it is to be grounded, may only be so for input voltages up to 400 V, because the potential of the minus
poleisshiftedintonegativedirectionbythevalueoftheinputvoltage.Alsoseetechnicalspecicationsheetsin
1.8.2, item “Insulation”.
For this reason, for all models which can support an input voltage higher than 400 V grounding of the DC plus
pole is not allowed.
• Do not ground the DC plus pole on any model with >400 V nominal voltage
• If grounding one of the input poles ensure that no output pole of the source (e.g. power supply)
is grounded. This could lead to a short-circuit!