Woodward LS-5 v2 Series - Page 96

Example
If the system A rated voltage is 400 V, the upper voltage limit is 110 % (of the system A
rated voltage, i.e. 440 V), and the hysteresis for the upper voltage limit is 5 % (of the
mains rated voltage, i.e. 20 V), the system A voltage will be considered as being out of
the operating limits as soon as it exceeds 440 V and will be considered as being within
the operating limits again as soon as it falls below 420 V (440 V – 20 V).
If the rated system frequency is 50 Hz, the lower frequency limit is 90 % (of the rated
system frequency, i.e. 45 Hz), and the hysteresis for the lower frequency limit is 5 % (of
the rated system frequency, i.e. 2.5 Hz), the mains frequency will be considered as being
out of the operating limits as soon as it falls below 45 Hz and will be considered as being
within the operating limits again as soon as it exceeds 47.5 Hz (45 Hz + 2.5 Hz).
ID Parameter CL Setting range
[Default]
Description
5810 Upper voltage limit 2 100 to 150 %
[110 %]
The maximum permissible positive
deviation of the system A voltage
from the system A rated voltage
(parameter 1768) is con󰈡gured here.
This value may be used as a voltage
limit switch. The conditional state of
this switch may be used as a
command variable for the
LogicsManager (02.09).
5814 Hysteresis upper voltage limit 2 0 to 50 %
[2 %]
If the system A voltage has exceeded
the limit con󰈡gured in parameter
5810, the voltage must fall below the
limit and the value con󰈡gured here, to
be considered as being within the
operating limits again.
5811 Lower voltage limit 2 50 to 100 %
[90 %]
The maximum permissible negative
deviation of the system A voltage
from the system A rated voltage
(parameter 1768) is con󰈡gured here.
This value may be used as a voltage
limit switch. The conditional state of
this switch may be used as a
command variable for the
LogicsManager (02.09).
5815 Hysteresis lower voltage limit 2 0 to 50 %
[2 %]
If the system A voltage has fallen
below the limit con󰈡gured in
parameter 5811, the voltage must
exceed the limit and the value
con󰈡gured here, to be considered as
being within the operating limits
again.
5812 Upper frequency limit 2 100.0 to 150.0 %
[105.0 %]
The maximum permissible positive
deviation of the system A frequency
from the rated system frequency
(parameter 1750) is con󰈡gured here.
This value may be used as a
frequency limit switch. The conditional
96 LS-5 v2 Series 37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released