Steca Elektronik StecaGrid 2020 Instrucciones De Instalación Y Manejo página 16

EN
Frequency limits
Voltage limits
React. pwr. char. curve
Overview
2 2
Technical details
14
ø
(average value)
3
4
1
5
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
The following voltage limits can be changed:
• Upper voltage disconnection value
• Lower voltage disconnection value
The disconnection value relates to the average value of
1)
the voltage.
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
• 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 (overexci-
tation) through 1.00 (no phase shift) to 0.95 (underexcita-
tion).
• 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 %.
(Fig. left)
1)
1)
744.711 | 12.20