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 38
ERS COMPACT
2.3.2.2
AC supply
The intended AC supply connection for these device is termination. It’s done via the 5 pole AC connector on the
rear (AC filter box). A matching plug is included. Wiring of the plug is at least 4 wire (3x L, PE) of suitable cross
section and length. Full configuration with all phases plus N and PE is permissible.
For recommendations for a cable cross section see
“2.3.5. Connection to AC supply”.
Dimensioning of the DC
wiring to the load/consumer has to reflect the following:
•
The cable cross section should always be specified for at least the maximum current of the
device.
•
Continuous operation at the approved limit generates heat which must be removed, as well as
voltage loss which depends on cable length and heating. To compensate for these the cable
cross section should be increased and the cable length reduced.
2.3.2.3
Additional measure for energy recovering devices
All models of this series are so-called recuperating device, at least when they’re working in sink mode. In this is
mode they feed back a specific amount of energy into the local or public grid. The devices can’t work without this
functionality. The goal is to consume the recovered energy completely in the local power grid of a company or
plant. In case it can occur that more energy is recuperated than consumed, the excess will be fed back into the
public grid which usually isn’t allowed without further precautions.
The operator of the device must,owing to circumstances, contact the local electric supply company and clarify what
is allowed and if a so-called network & system protection is required to be installed. There are several different
international provisions or standard, such as the german VDE-AR-N 4105/4110 or the british ENA EREC G99
which regulate this situation. The device itself provides a basic protection and would shut down energy feed back
in case it can’t work, but a full protection against frequency shift or voltage deviation can only be accomplished by
such an NS protection device, which will also prevent isolation operation.
We offer read-to-use NS protection solutions. They come on form of a module with or without contactors, mounted
on a 3U front plate for installation in a 19” rack or cabinet. This NS protection already fulfills the german AR-N 4105
and 4410, as well as the italian CEI 0-21 or the british G59/G98/G99. Also see sections
“1.9.4. Accessories”
and
“2.3.5.3. Restriction when operating the device with NS protection”.
Concept of an NS protection system:
Supervision
Device
L1
L2
L3
PE
N
GRID