Woodward LS-5 v2 Series - System B Voltage Phase Rotation

5802 Upper frequency limit 2 100.0 to 150.0 %
[105.0 %]
The maximum permissible positive
deviation of the system B 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 (02.04).
5803 Lower frequency limit 2 50.0 to 100.0 %
[95.0 %]
The maximum permissible negative
deviation of the system B 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 (02.04).
4.3.2.2
System B Voltage Phase Rotation
General notes
NOTICE!
Damage to the control unit and/or generation equipment
• Ensure that the control unit is properly connected to phase voltages on both sides of
the circuit breaker(s) during installation.
Failure to do so may result in damage to the control unit and/or generation equipment
due to the breaker closing asynchronously or with mismatched phase rotations. Also
ensure that phase rotation monitoring is enabled at all connected components
(generator, breakers, cable, busbars, etc.).
This function will block a connection of systems with wrong phases only under the
following conditions:
• The voltages being measured are wired correctly with respect to the phase rotation
at the measuring points (i.e. the potential transformers in on both sides of the
circuit breaker)
• The voltages being measured are wired so that angular phase shifts or any
interruptions from the measuring point to the control unit do not exist
• The voltages being measured are wired to the correct terminals of the control.
• The con󰈡gured alarm class is of class C or D (breaker relevant alarm).
Correct phase rotation of the phase voltages ensures that damage will not occur during a
breaker closure to either the mains or the generator. The voltage phase rotation alarm
checks the phase rotation of the voltages and the con󰈡gured phase rotation to ensure
they are identical.
The directions of rotation are di󰈠erentiated as "clockwise" and "counter clockwise". With
a clockwise 󰈡eld the direction of rotation is "L1-L2-L3"; with a counter clockwise 󰈡eld the
direction of rotation is "L1-L3-L2".
129LS-5 v2 Series37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released