Operation Manual 37107F
MFR 3 - Multi Function Relay
Page 52/165
© Woodward
23 LED
Test
Color: Blue
Check LED's
All control unit LED’s are illuminated by pressing this button to check for
proper operation.
24 ACK
Color: Blue
Acknowledgment
Alarm messages are acknowledged pressing the "ACK" push button. The
alarm messages on the LC display are cleared and the "Alarm" LED will
darken. The display is reset to the basic screen. Class F2 and F3 alarms can
only be acknowledged in the MANUAL operation mode. Refer to Alarm
Acknowledgement on page 45.
25 AUTO
Color: Blue
Select operating mode AUTOMATIC
If the AUTOMATIC operation mode is selected, automatic control of the
power circuit breaker control is enabled. By energizing or de-energizing
"Set point 1
↔
2" (terminal 5), the power set point can be changed.
•
Terminal 5 "Setpoint 1
↔
2" de-energized:
Real power set point 1 is active.
•
Terminal 5 "Setpoint 1
↔
2" energized:
Real power set point 2 or an external setpoint value is active. The user
may configure if set point 2, a 0/4-20 mA input, or an interface is to be uti-
lized.
LC Display
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
28
LC display LC display
The LC display shows messages and values, depending on the respective
mode applied. In configuration mode, the individual parameters are dis-
played and changed. In automatic mode the operating variables (e. g. vol-
tages and currents) can be called up.
NOTE
Using push-button "Display V
↓
" the voltages can be displayed.
Automatic Mode (First Display Line: Measuring Values)
xxxx yyy yyy yyy
----------------
Display in automatic mode, first line: measuring value
The following measuring values are displayed (depending on the LEDs V1/V2/V3)
on the top line of the display:
•
"xxxx" - generator voltage relating to which LEDs V1/V2/V3 are illuminated:
V1 illuminates
line-to-neutral voltage
V
L1-N
;
V2 illuminates
line-to-neutral voltage
V
L2-N
;
V3 illuminates
line-to-neutral voltage
V
L3-N
;
V1&V2 illum.
line-to-line voltage
V
L1-L2
;
V2&V3 illum.
line-to-line voltage
V
L2-L3
;
V3&V1 illum.
line-to-line voltage
V
L3-L1.
•
"yyy" - generator currents (line currents I
L1
, I
L2
and I
L3
).
