Woodward LS-5 v2 Series - Page 98

• Overvoltage level 2 (╚═▷ “4.3.1.7 System A Overvoltage (Level 1 & 2) ANSI# 59”)
• Undervoltage level 1 if parametrized (╚═▷ “4.3.1.8 System A Undervoltage (Level 1
& 2) ANSI# 27”)
• Undervoltage level 2 (╚═▷ “4.3.1.8 System A Undervoltage (Level 1 & 2) ANSI# 27”)
• Phase shift or df/dt (╚═▷ “4.3.1.3 Phase Shift”)
• Voltage increase if parametrized for decoupling (╚═▷ “4.3.1.10 System A Voltage
Increase”)
If one of these protective functions is triggered, the display indicates "SyA. decoupling"
(the logical command variable "07.25" will be enabled) and an active level 2 alarm.
The decoupling function is optimized on the relay outputs "CBA open" and "CBB open". In
case of using a free relay output in conjunction with the command variable 07.25 an
additional delay time of up to 20 ms must be considered.
ID Parameter CL Setting range
[Default]
Description
12942 Enable SyA. decoupling 2 Determined by
LogicsManager
If LogicsManager 24.31 is true,
decoupling is "On".
Notes
For information on the LogicsManager
and its default settings see ╚═▷ “9.3.1
LogicsManager Overview”.
3058 Change of frequency 2 O󰈠 Change of frequency is not monitored.
[Ph. shift] Change of frequency is monitored on
phase shift.
df/dt Change of frequency is monitored on
df/dt (ROCOF).
Ph-sh.,df/dt Change of frequency is monitored on
df/dt (ROCOF) and on phase shift
(logical OR).
3110 SyA. decoupling 2 O󰈠 System A decoupling is disabled
[CBA] System A decoupling is carried out
according to the following parameters.
If one of the subordinate monitoring
functions is triggered, the CBA will be
opened.
CBA -> CBB System A decoupling is carried out
according to the following parameters.
If one of the subordinate monitoring
functions is triggered, the CBA will be
opened. If the reply "CBA open" is not
present within the delay con󰈡gured,
the CBB will be opened as well.
CBB System A decoupling is carried out
according to the following parameters.
If one of the subordinate monitoring
98 LS-5 v2 Series 37650
4 Con󰈡guration
4.3 Con󰈡gure Monitoring
Released