Woodward LS-5 v2 Series - System a Decoupling

state of this switch may be used as a
command variable for the
LogicsManager (02.10).
5816 Hysteresis upper frequency limit 2 0 to 50 %
[0.5 %]
If the system A frequency has
exceeded the limit con󰈡gured in
parameter 5812, the frequency must
fall below the limit and the value
con󰈡gured here, to be considered as
being within the operating limits
again.
5813 Lower frequency limit 2 50.0 to 100.0 %
[95.0 %]
The maximum permissible negative
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
state of this switch may be used as a
command variable for the
LogicsManager (02.10).
5817 Hysteresis lower frequency limit 2 0 to 50 %
[0.5 %]
If the system A frequency has fallen
below the limit con󰈡gured in
parameter 5811, the frequency must
exceed the limit and the value
con󰈡gured here, to be considered as
being within the operating limits
again.
4.3.1.2
System A Decoupling
General notes
The system A decoupling function is intended for use in a mains parallel operation and
monitors a series of subordinate mains protection thresholds. If a threshold is exceeded,
the LS-5 initiates a breaker opening and separates the system B from the mains at the
de󰈡ned breaker.
The mains decoupling can be fully maintained by the LS-5 device as long no mains
decoupling according to VDE-AR-N 4105 is required. If mains decoupling according to
VDE-AR-N 4105 is required, please refer to ╚═▷ “6.5 Setup VDE-AR-N 4105 Applications”.
The following thresholds are monitored:
• Overfrequency level 1 (╚═▷ “4.3.1.5 System A Overfrequency (Levels 1 & 2) ANSI#
81O”)
• Overfrequency level 2 (╚═▷ “4.3.1.5 System A Overfrequency (Levels 1 & 2) ANSI#
81O”)
• Underfrequency level 1 (╚═▷ “4.3.1.6 System A Underfrequency (Level 1 & 2) ANSI#
81U”)
• Underfrequency level 2 ╚═▷ “4.3.1.6 System A Underfrequency (Level 1 & 2) ANSI#
81U”()
•
Overvoltage level 1 if parametrized for decoupling (╚═▷ “4.3.1.7 System A
Overvoltage (Level 1 & 2) ANSI# 59”)
97LS-5 v2 Series37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released