Functions
2.26 Rate-of-Frequency-Change Protection df/dt (ANSI 81R)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
197
2.26.3 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Additional Settings.
Addr. Parameter Setting Options Default Setting Comments
4501 df/dt Protect. OFF
ON
Block relay
OFF Rate-of-frequency-change pro-
tection
4502 df1/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df1/dt >/<)
4503 STAGE df1/dt 0.1 .. 10.0 Hz/s; ∞ 1.0 Hz/s Pickup Value of df1/dt Stage
4504 T df1/dt 0.00 .. 60.00 sec; ∞ 0.50 sec Time Delay of df1/dt Stage
4505 df1/dt & f1 OFF
ON
OFF AND logic with pickup of stage f1
4506 df2/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df2/dt >/<)
4507 STAGE df2/dt 0.1 .. 10.0 Hz/s; ∞ 1.0 Hz/s Pickup Value of df2/dt Stage
4508 T df2/dt 0.00 .. 60.00 sec; ∞ 0.50 sec Time Delay of df2/dt Stage
4509 df2/dt & f2 OFF
ON
OFF AND logic with pickup of stage f2
4510 df3/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df3/dt >/<)
4511 STAGE df3/dt 0.1 .. 10.0 Hz/s; ∞ 4.0 Hz/s Pickup Value of df3/dt Stage
4512 T df3/dt 0.00 .. 60.00 sec; ∞ 0.00 sec Time Delay of df3/dt Stage
4513 df3/dt & f3 OFF
ON
OFF AND logic with pickup of stage f3
4514 df4/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df4/dt >/<)
4515 STAGE df4/dt 0.1 .. 10.0 Hz/s; ∞ 4.0 Hz/s Pickup Value of df4/dt Stage
4516 T df4/dt 0.00 .. 60.00 sec; ∞ 0.00 sec Time Delay of df4/dt Stage
4517 df4/dt & f4 OFF
ON
OFF AND logic with pickup of stage f4
4518 U MIN 10.0 .. 125.0 V; 0 65.0 V Minimum Operating Voltage Umin
4519A df1/2 HYSTERES. 0.02 .. 0.99 Hz/s 0.10 Hz/s Reset Hysteresis for df1/dt &
df2/dt
4520A df1/2 M-WINDOW 1 .. 25 Cycle 5 Cycle Measuring Window for df1/dt &
df2/dt
4521A df3/4 HYSTERES. 0.02 .. 0.99 Hz/s 0.40 Hz/s Reset Hysteresis for df3/dt &
df4/dt
4522A df3/4 M-WINDOW 1 .. 25 Cycle 5 Cycle Measuring Window for df3/dt &
df4/dt
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