APS 6RL Series, Руководство по эксплуатации

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6RL SERIES OPERATION MANUAL
SECTION 4: TECHNICAL SPECIFICATIONS
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
2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual Page 51 of 204
5.10.4 DC Input Grounding
Individually operated loads can always be grounded from 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
grounded for input voltages up to 400Vdc, because the potential of the minus pole is shifted
into negative direction by the value of the input voltage. See Technical Specification section
for insulation voltage limits.
Following also has to be considered:

Do not ground the DC plus pole on any model with >400 V nominal voltage.

If grounding one of the input poles, make sure that no output pole of the source
(e.g. power supply) is grounded. This could result in a short-circuit!
5.10.5 Remote Voltage Sense Connections
To minimize voltage drop on the load cables to the unit under test, remote voltage sense
connections are recommended. This is especially true for high current applications or in
situations where the long cables are long. Voltage sense wires carry no load current so can
be considerable smaller in diameter than load cables.
Remote sensing is only effective during constant voltage operation (CV). For other
regulation modes, the external voltage sense inputs should be disconnected, if possible.
Connecting them in non-CV mode generally increases the tendency of the output to
oscillate.

Remote sensing is only effective during constant voltage operation (CV) and for
other regulation modes the sense input should be disconnected if possible, because
connecting it generally increases the tendency to oscillate.

The cross section of the sense cables is not critical. Recommendation for cables up
to 5 m. is to at least 0.5 mm².

Sense cables should be twisted and laid close to the DC cables to dampen
oscillation. If necessary, an additional capacitor should be installed at the load
terminal to eliminate any oscillation.

The positive (+) sense cables must be connected to the positive terminal (+) on the
source and negative (-) sense to the negative terminal (-) at the source, otherwise
the sense input stage of the DC load can be damaged by the reversed polarity. See
Figure 5-5 below for proper polarity.

In master-slave configurations, the remote sensing should be connected to the
master unit only.