Manual 37143A
MFR 15 - Protection Relay & Control
Page 54/119
© Woodward
Voltage Controller (
Option Y
/
G
/
GU
)
Volt. controller
ON
Voltage controller
ON/OFF
ON
................Generator voltage control is enabled. The subsequent screens of this
function are displayed.
OFF
..............Generator voltage control is disabled. The subsequent screens of this
function are not displayed.
Volt. controller
Setp. variable
(with
Option G
/
GU
only)
Presetting voltage set point selection
variable/fixed
Fixed
.............The set fixed set point value is continually adjusted. An external cor-
rection of the set point value via actuating signals "higher" or "lower"
is not possible.
Variable
.......The set point can be externally corrected within certain limits.
Set Point Setting
Volt. controller
Setpoint 000V
Fixed-voltage set point value
[1] 50 to 125 V; [4] 70 to 440 V
This parameter defines the voltage reference point for the control to use in isolated
and no-load operations. The value entered into this parameter refers to the secon-
dary rated voltage of the PTs or the system voltage if PTs are not utilized.
Volt. controller
min.value OO0V
Set point "variable"
(only with
Option G
/
GU
)
Lower limit for variable voltage set point value
[1] 50 to 125 V; [4] 70 to 440 V
The set value indicates the minimum set point value that can be reached with an ex-
ternal set point selection via that actuating signals "lower". The smaller voltage
value should be entered here.
Volt. controller
max.value OO0V
Set point "variable"
(only with
Option G
/
GU
)
Upper limit for variable voltage set point value
[1] 50 to 125 V; [4] 70 to 440 V
The set value indicates the maximum set point that can be reached with an external
selection of the set point via actuating signal "higher". The greater voltage value
should be entered here; otherwise, the assignment to terminals 6 and 7 ("higher"
and "lower" is reversed).
Setpoint voltage
Gradiant = 00V/s
Set point "variable"
(only with
Option G
/
GU
)
Potentiometer voltage set point increase
1 to 20 V/s
The effect of the increase indicates the speed (in volts per second) at which the
voltage set point value changes when selected using the "higher"/"lower" signals on
the digital inputs via an actuating signal.
Setpoint ramp
Ramp = 00V/s
(only with
Option G
/
GU
)
Voltage controller set point ramp
1 to 20 V/s
The set point ramp indicates how rapidly (in volts per second) the voltage set point
is supposed to approach its limit value. The change is linear.