Settings - Siemens Siprotec 7UM611 Manual

Setting changes are necessary e.g. to obtain a great dropout difference. For the de-
tection of very small frequency changes (< 0.5 Hz/s), the default setting of the mea-
suring window should be extended. This is to improve the measuring accuracy.
Address 4518 U MIN is used to set the minimum voltage below which the frequency
Minimum Voltage
change protection will be blocked. A value of approx. 65 % U
minimum voltage threshold can be deactivated by setting this address to "0".

2.19.3 Settings

Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
Addr. Parameter
4501 df/dt Protect.
4502 df1/dt >/<
4503 STAGE df1/dt
4504 T df1/dt
4505 df1/dt & f1
4506 df2/dt >/<
4507 STAGE df2/dt
4508 T df2/dt
4509 df2/dt & f2
4510 df3/dt >/<
4511 STAGE df3/dt
4512 T df3/dt
4513 df3/dt & f3
4514 df4/dt >/<
4515 STAGE df4/dt
4516 T df4/dt
7UM61 Manual
C53000-G1176-C127-3
2.19 Rate-of-Frequency-Change Protection df/dt (ANSI 81R)
df/dt HYSTERES.
Setting value
Stage df /dt (Addr. 4519, 4521)
n
≈ 0.05
0.1...0.5 Hz/s
≈ 0.1
0.5...1 Hz/s
≈ 0.2
1...0.5 Hz/s
≈ 0.5
5...00.10 Hz/s
Setting Options
OFF
ON
Block relay
-df/dt<
+df/dt>
0.1 .. 10.0 Hz/s; ∞
0.00 .. 60.00 sec; ∞
OFF
ON
-df/dt<
+df/dt>
0.1 .. 10.0 Hz/s; ∞
0.00 .. 60.00 sec; ∞
OFF
ON
-df/dt<
+df/dt>
0.1 .. 10.0 Hz/s; ∞
0.00 .. 60.00 sec; ∞
OFF
ON
-df/dt<
+df/dt>
0.1 .. 10.0 Hz/s; ∞
0.00 .. 60.00 sec; ∞
dfx/dt M-WINDOW
(Addr. 4520, 4522)
25...10
10...5
10...5
5...1
Default Setting
OFF Rate-of-frequency-change pro-
tection
-df/dt< Mode of Threshold (df1/dt >/<)
1.0 Hz/s Pickup Value of df1/dt Stage
0.50 sec Time Delay of df1/dt Stage
OFF AND logic with pickup of stage f1
-df/dt< Mode of Threshold (df2/dt >/<)
1.0 Hz/s Pickup Value of df2/dt Stage
0.50 sec Time Delay of df2/dt Stage
OFF AND logic with pickup of stage f2
-df/dt< Mode of Threshold (df3/dt >/<)
4.0 Hz/s Pickup Value of df3/dt Stage
0.00 sec Time Delay of df3/dt Stage
OFF AND logic with pickup of stage f3
-df/dt< Mode of Threshold (df4/dt >/<)
4.0 Hz/s Pickup Value of df4/dt Stage
0.00 sec Time Delay of df4/dt Stage
is recommended. The
N
Comments
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