Start / Stop Key Operated Spring-Return Switch (-S1) - Hyundai HPC-250HT User Manual

USER MANUAL of HPC-250HT

3.2.3 Start / Stop Key Operated Spring-Return Switch (-S1)

The key operated spring-return switch (–S1) can be in one of three possible positions START,
STOP and CENTER. START and STOP are momentary positions and the switch
automatically returns to the CENTER position after leaving hold of its operating key.
The HPC-250HT can be set to "Offline" or "Connecting to Solar Arrays" mode, the "Automatic
Startup" sequence can be aborted or skipped and the User Interface backlight illumination
can be turned ON with the Start / Stop Key Operated Spring-Return Switch (-S1).
Instantaneous operation of the Start / Stop Key Operated Spring Return Switch (-S1) in
either direction enables the backlight illumination of the HPC-250HT User Interface. The
backlight illumination of the HPC-250HT User Interface will stay enabled for 60 minutes
counting from the last actuation of the Start / Stop Key Operated Switch in either direction.
In case the system is in "Offline" state, when the switch is turned to the Start position for at
least three seconds the system state of the HPC-250HT changes from "Offline" to
"Conencting to Solar Arrays".
In case the system is not in "Trip", "Emergency" or "Waiting after Grid Failure" state, when
the switch is turned to the stop position for at least three seconds the system initializes a shut
down sequence and the system state changes according to, and the steps of this shut-down
sequence depend on the actual state of the system at the moment of the stop request.
Each time the auxiliary power supply was connected to the MCU of the HPC-250HT the
system waits for additional 5 minutes before initiating an automatic start up sequence. This
waiting time can be interrupted by turning the Start/Stop Key operated Switch in Stop
direction for at least three seconds, or skipped by turning the Start/Stop Key Operated Switch
in Start direction for at least 3 second three. If the automatic startup process is skipped, the
operation state is redirected to "Waiting after Grid Failure" state.
Each time the utility grid voltage is disconnected from the HPC-250HT or the power supply is
disconnected from the MCU of the HPC-250HT, the system waits for additional five minutes
counting from the reconnection of the MCU power supply or counting from the moment in
which the stable condition of the utility network has been met, respectively, before the HPC-
250HT is allowed to connect to the utility grid again. Note, that the utility grid stability waiting
time can be in coincidence with the Automatic Start Up waiting time, but can not be
shortened or interrupted.
The conditions, in which the utility network can be considered stable can be defined on the
"Setting 2" tab page of the User Interface and are identified as "Nominal Grid Voltage",
"Nominal Grid Frequency", "Minimum Grid Voltage", "Maximum Grid Voltage", "Grid
Frequency Limit F -F " and "Grid Frequency Limit F -F ".
max nom nom min
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