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Program features 19
Grid monitoring
The PRO-33.0-TL inverter monitors the grid conditions with internal measurements. The
measured values are compared against the limits set in the parameter group
. If the measured value does not stay within the limit for a certain minimum
period of time, the inverter declares the grid as unstable. All grid monitoring settings are
reset when the country code is changed.
Notes
:
•
If the grid monitoring settings are changed, do a parameter refresh with the parameter
•
Depending on the installation country, an external third party-certified grid monitoring
relay may be needed.
Nominal values
Note
: The fault ride-through settings must be taken into account when defining grid
monitoring.
The inverter monitors either line-to-line voltages or line-to-neutral voltages. This is
selected with the parameter
that can be set to
Main
or
Phase
,
respectively. The settings for grid monitoring are set in relation to the nominal value.
Settings
Connection delays
Typically, it is required that the grid must be stable for some time before grid connection is
allowed. For this purpose there is a set of delays.
•
defines the delay that must expire before the first grid
connection after a power-up can be made.
•
defines the delay that must expire after a disconnection
before the following reconnection.
•
is used if the grid is unstable for less than the value
defined in parameter
. Thus a short unstable grid allows
a faster reconnection. If the parameter
is set to
0
, quick
reconnection is not used.
Settings
Содержание PRO-33.0-TL Series
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