Operation Manual

Protect PV.250 Operating Instructions
Page 11 of 51 80000027023 BAL, en
4.1.2 The "Waiting for feed conditions" Status
In this status, the Protect PV.250 monitors the DC voltage of the
PV cells that is present at the unit, as well as the mains voltage
and the mains frequency.
The monitoring systems are activated.
In this status, no power is fed into the mains.
Possible change of status:
If the DC voltage rises above a certain value for a certain time and
the mains voltage and mains frequency are within a certain range,
the unit switches to the "Operation" status. An attempt to start up is
made which involves switching on the inverter stack. If the DC
voltage collapses too dramatically during this start-up attempt, the
stack is switched off again and there is a delay until the next start-
up attempt is made. The unit will not switch to the "Operation"
status until a start-up attempt during which the DC voltage does
not dip too significantly.
If the DC voltage falls below a certain value for a certain time, the
unit switches to the "Night" status.
If a deactivating or self-acknowledging fault is triggered, the unit
switches to the "Fault" status.
The status can be switched from "Waiting for feed conditions" to
"OFF" using the "Off" control command.
4.1.3 The "Operation" Status
The Protect PV.250 has met all conditions for operation and no
deactivating or self-acknowledging faults are present.
The monitoring systems are activated.
In this status, power is fed into the mains and the inverter output
contactor K7 is closed.
Possible change of status:
If the generated power falls below a certain value for a certain
time, the operating conditions are no longer met. The unit then
switches to the "Waiting" status.
If a deactivating or self-acknowledging fault is triggered, the unit
switches to the "Fault" status.
The status can be switched from "Operation" to "OFF" using the
"Off" control command.
4.1.4 The "Waiting" Status
If the power fed in falls below a certain value in "Operation", the
unit switches to the "Waiting" status. Although the incoming power
is low, the DC voltage of the PV cell could still be high enough and
even stable enough to meet the feed conditions in the "Waiting for
feed conditions" status. So that the inverter does not switch back
on again immediately, thereby subjecting the inverter output con-
tactor K7 to unnecessary load due to frequent switching, after the
"Operation" status the unit initially switches to the "Waiting" status.
It remains in this status for a certain time, only switching to the
"Waiting for feed conditions" status once this time has elapsed.
The monitoring systems are activated.