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For a t otal c able length (connecting cable of the
charging system and vehicle charging cable) of up
to 5 m, the PE conductor resistance must not exceed
300 mΩ. If the cables are longer, allowances must
be added in accordance with the applicable national
regulations. In any case, the resistance must never
exceed 1 Ω.
•
Insulation test
The charging system is equipped with a discon-
necting relay and therefore requires two insulation
measurements. The charging system must be discon-
nected from the mains for this purpose. Therefore,
switch off the mains voltage at the circuit breaker in
the building's electrical cabinet before performing
the measurement.
» First measurement on the primary side of the
charging system
On the primary side of the charging system, meas-
ure the insulation resistance at the connection
point of the charging system's supply cable in the
building's electrical cabinet. The value must not be
less than 1 MΩ.
The charging system is equipped with an
overvoltage protection device. This may be
taken into account when performing the
measurement.
» Second measurement on the secondary side of
the charging system
To do this, connect the charging coupler to a
test adapter for vehicle simulation according
to EN IEC 61851-1. Perform the insulation meas-
urement via the measuring sockets on the test
adapter. The value must not be less than 1 MΩ.
A lternatively, the differential-current method in
combination with measuring the PE conductor
current can be used. A value of 3.5 mA must not
be exceeded in either case. To perform these
measurements, connect the charging coupler
to a test adapter for vehicle simulation according
to EN IEC 61851-1. The measurements must be per-
formed in adapter state C. The differential-current
measurement must be performed at the connec-
tion point of the charging system's supply cable in
the building's electrical cabinet.
Depending on the measuring instrument
used, it might not be possible to perform
the following measurement on the adapter.
In this case, perform the test at the connec-
tion terminals.
•
Testing the switch‑off condition in the event of
a short circuit (Z
)
L-N
To perform these measurements, connect the charg-
ing coupler to a test adapter for vehicle simulation
according to EN IEC 61851-1. The measurements must
be performed in adapter state C. Perform the meas-
urements at the test adapter's measuring sockets.
22
The values in accordance with the selected circuit
breaker must be observed.
•
Testing the switch‑off condition in the event of the
RCD tripping
To perform these measurements, connect the charg-
ing coupler to a test adapter for vehicle simulation
according to EN IEC 61851-1. The measurement must
be performed in adapter state C. Perform the meas-
urement at the measuring sockets of the test adapter
using a suitable measuring instrument. The values in
accordance with the selected RCD and the network
must be observed.
•
Testing the integrated DC residual current detection
To perform these measurements, connect the charg-
ing coupler to a test adapter for vehicle simulation
according to EN IEC 61851-1. The measurements must
be performed in adapter state C. Perform the meas-
urements at the test adapter's measuring sockets
using a suitable measuring instrument. The charging
system must disconnect the charging coupler
from the mains when the residual current exceeds
6 mA DC. The fault display on the charging system
must respond.
•
Testing the upstream RCD
The upstream RCD must be tested at the connection
point of the charging system's supply cable in the
building's electrical cabinet. The RCD must trip in
accordance with the national regulations.
1.6
Information about signs, symbols and
labelling
Hazard warning:
Information about a possibly hazardous situation that
could be fatal or result in severe injuries if the safety
measures are not observed. All work to be conducted by
skilled personnel only.
Note:
supplementary information.
1.7
Protective devices
The following components (Fig. 11) are protective
devices:
No. 1 housing, no. 5 coupler holder, no. 6 charging cou-
pler, no. 7 charging cable
Checking the protective devices
» 1. Visually inspect the protective devices for damage
before every charging process.
» 2. Have a qualified electrician perform the electrical
function tests at regular intervals in compliance
with the national regulations.
