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Front panel
Indicators for measured values,
voltage U and frequency f
Indicator for rated frequency setting
Indicator for undervoltage setting
Indicator for protection stage 1 settings
Indicator for protection stage 2 settings
Indicator for protection stage 3 settings
Indicator for protection stage 4 settings
Indicator for df/dt settings
Indicator for recovery function settings
Indicator for SGF settings
Indicator for SGB checksum
Indicator for SGR checksum
Fig.3. Front panel of the combined frequency and rate of change of frequency relay module
SPCF 1D15
Simplified device
< >
f
d f
symbol
>
<
d t
U
f
IRF
Self-supervision
alarm indicator
Display
RESET
[
]
f
Hz
n
STEP
Reset and display
U
/
U
<
n
step push-button
f
[
]
Hz
1
,
[ ]
t
t
s
, 1
1
f
[
]
Hz
2
,
t
[ ]
t
s
, 2
2
f
[
]
Hz
3
,
[ ]
t
t
s
, 3
3
[
]
f
Hz
4
,
t
t
[ ]
s
, 4
4
d f d t
/
[
/
]
Hz s
∆
f
[
]
Hz
t
[ ]
s
r
PROGRAM
Pogramming
SGF
push-button
SGB
SGR
Trip indicator
TRIP
Type designation
SPCF 1D15
of relay module
7
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