54
742.221 | 12.04
EN
Frequency limits
The following frequency limits can be changed:
•
Upper frequency disconnection value
•
Lower frequency disconnection value (fig. left)
•
Derating switch-on threshold (because frequency is too high)
•
Frequency threshold when switching on again
Voltage limits
ø
(average value)
The following voltage limits can be changed:
•
Upper voltage disconnection value
1)
(fig. left)
•
Lower voltage disconnection value
1)
1)
The disconnection value relates to the
average value
of
the voltage.
React. pwr. char. curve
Overview
4
5
22
3
1
The reactive power characteristic curve must be set during
initial commissioning if this is prescribed for the previously
selected country. The following applies:
•
3 characteristic curves are available for selection (fig. left):
–
Default
.
char
.
curve
(pre-defined)
–
Char
.
curve
cos
φ
=
1
(pre-defined)
–
Enter
char
.
curve
(manually adjustable)
•
After configuration, the characteristic curve is displayed as
a graph (example in fig. left).
x-axis, output power P in %
y-axis, phase shift cos
φ
Nodes (in example: 4 nodes)
Arrow symbol
Overexcitation
Arrow symbol
Underexcitation
Technical details
•
Each characteristic curve is defined by 2 to 8 nodes.
•
A node is defined by the output power P of the inverter
(x-axis) and the associated phase shift (y-axis).
•
The phase shift can be set over a range of 0.95 (overexcita-
tion) through 1.00 (no phase shift) to 0.95 (underexcitation).
•
The type of phase shift is shown in the graph using arrow
symbols defined as follows (defined from the point of
view of the inverter):
: Overexcitation, inductive
: Underexcitation, capacitive
•
The 3 characteristic curves available for selection have the
following properties:
Default
.
char
.
curve
: pre-defined according to the
selected country (example in fig. left).
Char
.
curve
cos
φ
=
1
: pre-defined with cos
φ
= con-
stantly 1.00
Enter
char
.
curve
: The number of nodes and their x/y
values can be configured.
Exceptions: The 1st node is always located at
x (
P
%
) = 0 % and the last node is always located at
x (
P
%
) = 100 %.
Содержание coolcept StecaGrid 3000
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