Studer NEXT3 User Manual

Studer Innotec SA
next3
Technical user manual V1.3 © Studer-Innotec SA 113
8.7.4 AC-Flex as load; Settings
The main choice for the ac-flex being an AC-source entry or an AC load output is done during the
commissioning with the wizard. There is no possibility to change this again live without stopping all the
systems.
The 3 AC-Flex load contacts of each phase of one device can be programmed
independently to open and close under various conditions. The contact corresponding to
the neutral is automatically switched on when at least one phase is activated.
The programming is organised at the level 2 with a simplified menu (level 3) proposing the
choice between Modes:
• Manual OFF: always deactivated, in position NO. This is also the unpowered state.
• Manual ON: always activated, in position NC
• AUTO: some activation/deactivations conditions
are used. This can be chosen in a list of simple use
pre-set cases (one is selectable at a time)
o Battery voltage: An hysteresis is used to
activate relay when battery voltage
reaches threshold activation voltage and
deactivate relay when threshold
deactivation voltage is reached. Used for
example for load shedding when the
battery gets empty.
o Battery SOC : An hysteresis is used to
activate relay when battery SOC reaches
threshold activation SOC and deactivate
relay when threshold deactivation SOC is
reached. Used for example for a genset
start on battery state of charge or a load
shedding when the battery is empty.
o Battery temperature: for example to start a
heater when the battery temperature is
too low to avoid freezing.
o Battery charge phase: for example to run a fan in equalization for open lead acid
battery.
o Power AC : This is used for load shedding, when there is too much load, the relay is
activated until the power is reduced under another level.
o Solar excess OnGrid: activated when power is fed to the grid over a given level. This
can be used for example to switch on loads for self-consumption optimisation. The
hysteresis and delay allow to optimize the switching the load (avoid turn on and off
repeadly).
o Solar excess OffGrid: activated when the battery is full and there is unused solar. This
is used in order to optimize the use of solar in offgrid.
o Scheduled time: chose a time frame during the day to activate the contact.
o On-grid: This is used for example to connect some loads when connected to an AC-
source if you don’t want to have them running on the batteries.

Studer NEXT3 Specifications

General

Brand	Studer
Model	NEXT3
Category	Industrial Equipment
Language	English