12
TB MRF3 04.01 E
5
Operation and settings
5.1
Display
Function
Display shows
Pressed pushbutton
Corresponding
LED
Colour
of LED
Normal operation:
SEG
Measured operating values
meas. value of voltage
<SELECT/RESET>
U
green
meas. value of frequency
<SELECT/RESET>
f
green
Min./Max. frequency
measuring values before
last reset
<SELECT/RESET>
one time for each value
f + (min or max)
green
Measuring value df/dt
<SELECT/RESET>
one time for each value
df/dt
green
Min./Max. measuring
value of frequency gradi-
ent before last reset
<SELECT/RESET>
one time for each value
df/dt + (min or
max)
green
Setting values:
Rated frequency f
N
Setting value in Hz
<SELECT/RESET><+><->
f
N
green
Measuring repetition
Setting value in periods of
nominal frequency
<SELECT/RESET><+><->
T
red
Frequency pickup value f
1
Reclaim value for f
1
Tripping delay time for f
1
Reclaim time for f
1
Setting value in Hz
setting value in seconds
setting value in seconds
setting value in seconds
<SELECT/RESET><+><->
one time for each value
one time for each value
one time for each value
f
1
f
1
+R
t
f1
tf
1
+ t
R
green
green
red
red
Frequency pickup value f
2
Reclaim value for f
2
tripping delay time for f
2
Reclaim time for f
2
Setting value in Hz
setting value in seconds
setting value in seconds
setting value in seconds
<SELECT/RESET><+><->
one time for each value
one time for each value
one time for each value
f
2
f
2
+R
t
f2
tf
2
+ t
R
green
green
red
red
Frequency pickup value f
3
Reclaim value for f
3
tripping delay time for f
3
Reclaim time for f
3
Setting value in Hz
Setting value in seconds
setting value in seconds
setting value in seconds
<SELECT/RESET><+><->
one time for each value
one time for each value
one time for each value
f
3
f
3
+R
t
f3
tf
3
+ t
R
green
green
red
red
Frequency pickup value f
4
Reclaim value for f
4
tripping delay time for f
4
Reclaim time for f
4
Setting value in Hz
Setting value in seconds
setting value in seconds
setting value in seconds
<SELECT/RESET><+><->
one time for each value
one time for each value
one time for each value
f
4
f
4
+R
t
f4
tf
4
+ t
R
green
green
red
red
1. Frequency threshold value fe for
df/dt measuring
Setting value in Hz or
„VARI
1)
“
<SELECT/RESET><+><->
fe + df
1
green
1)
Lower frequency threshold value
fe for df/dt measuring
1)
Higher frequency threshold value
fe for df/dt measuring
Setting value in Hz
<SELECT/RESET><+><->
fe + df
1
+ min
fe + df
1
+ max
green
yellow
green
yellow
2. Frequency threshold value fe for
df/dt measuring
Setting value in Hz or
„VARI
1)
“
<SELECT/RESET><+><->
fe + df
2
green
1)
Lower frequency threshold value
fe for df/dt measuring
1)
Higher frequency threshold value
fe for df/dt measuring
Setting value in Hz
<SELECT/RESET><+><->
fe + df
2
+ min
fe + df
2
+ max
green
yellow
green
yellow
Setting value df
1
/dt
Different time or value of the trip
counter for df
1
/dt
Setting value in Hz /s
Setting value in periods of
rated frequency
<SELECT/RESET><+><->
one time for each value
df
1
dt
1
green
red
Setting value df
2
/dt
Different time or value of the trip
counter for df
2
/dt
Setting value in Hz /s
Setting value in periods of
rated frequency
<SELECT/RESET><+><->
one time for each value
df
2
dt
2
green
red
Function blocking
EXIT
<SELECT/RESET><+><->
LED of blocked
parameters
green
Blocking for the frequency measuring
Setting value in Volt
<SELECT/RESET><+><->
U
B
t
min
green
yellow
1)
The MRF3 is operating with the df/dt function
2)
Setting is only possible in case of dt/df trip
Summary of Contents for MRF3
Page 1: ...MRF3 Frequency Relay...
