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6Suspend Charging mode installation guide | Version 1.0 | July 2019
ENGLISH
2.1 Functionality
Alfen has developed a solution to suspend a running
charging session on request of the grid operator.
Suspending the charging session is done in a controlled
way, according to the Mode 3 protocol.
The grid operators energy meter is equipped with a
potential free contact. The grid operator controls the
energymeterandcaneitheropenorclosethecontact(S1).
When the contact is closed, the charging station can charge
at full power. When the contact is open, the charging power
isreducedto0W.
The charging station makes sure a running transaction is
suspended according to the Mode 3 protocol. The screen
onthechargingstationwillshowamessagefortheuser:
‘Charging session halted by energy supplier’. In case the
charging station is not equipped with a screen, the blue
led will blink to indicate the power supply is halted by the
energysupplier.Duringtheshut-otimeitispossibleto
start a new charging session; the session, however, will be
paused immediately. As soon as the potential free contact
(S1)closesagain,thechargingstationwillcontinuethe
suspended charging session.
Image 1: Overview of the energy meter and charging station
2. FUNCTIONALITY
DANGER!
In this document the contact is considered to be closed
when charging is allowed. In practice it is possible that the
contact is open when charging is allowed. The installer is
responsible to assess the situation and act accordingly.
NOTICE!
This functionality is developed for all Eve (Single and
Double)chargingstationsandavailablefromsoftware
version 3.4.2 and higher.
S1
6


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