Siemens SIPROTEC 4 7VE61 User Manual

Minimum Voltage
Address 4518 U MIN is used to set the minimum voltage below which the frequency change protection will
be blocked. A value of approx. 65 % U
N
is recommended. The minimum voltage threshold can be deactivated
by setting this address to 0.
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 protec-
tion
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 STAGE df1/dt 0.1 .. 3.0 Hz/s 0.3 Hz/s Pickup Value of df1/dt Stage
4505 T df1/dt 0.00 .. 60.00 sec 0.50 sec Time Delay of df1/dt Stage
4506 df1/dt & f1 OFF
ON
OFF AND logic with pickup of stage f1
4507 df2/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df2/dt >/<)
4508 STAGE df2/dt 0.1 .. 10.0 Hz/s 1.0 Hz/s Pickup Value of df2/dt Stage
4509 STAGE df2/dt 0.1 .. 3.0 Hz/s 0.3 Hz/s Pickup Value of df2/dt Stage
4510 T df2/dt 0.00 .. 60.00 sec 0.50 sec Time Delay of df2/dt Stage
4511 df2/dt & f2 OFF
ON
OFF AND logic with pickup of stage f2
4512 df3/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df3/dt >/<)
4513 STAGE df3/dt 0.1 .. 10.0 Hz/s 4.0 Hz/s Pickup Value of df3/dt Stage
4514 STAGE df3/dt 0.1 .. 3.0 Hz/s 1.3 Hz/s Pickup Value of df3/dt Stage
4515 T df3/dt 0.00 .. 60.00 sec 0.00 sec Time Delay of df3/dt Stage
4516 df3/dt & f3 OFF
ON
OFF AND logic with pickup of stage f3
4517 df4/dt >/< -df/dt<
+df/dt>
-df/dt< Mode of Threshold (df4/dt >/<)
4518 STAGE df4/dt 0.1 .. 10.0 Hz/s 4.0 Hz/s Pickup Value of df4/dt Stage
4519 STAGE df4/dt 0.1 .. 3.0 Hz/s 1.3 Hz/s Pickup Value of df4/dt Stage
4520 T df4/dt 0.00 .. 60.00 sec 0.00 sec Time Delay of df4/dt Stage
4521 df4/dt & f4 OFF
ON
OFF AND logic with pickup of stage f4
4522 U MIN 10.0 .. 125.0 V 65.0 V Minimum Operating Voltage Umin
4523A df1/2 HYSTERES. 0.02 .. 0.99 Hz/s 0.10 Hz/s Reset Hysteresis for df1/dt & df2/dt
4524A df1/2 M-WINDOW 1 .. 25 Cycle 5 Cycle Measuring Window for df1/dt &
df2/dt
4525A df3/4 HYSTERES. 0.02 .. 0.99 Hz/s 0.40 Hz/s Reset Hysteresis for df3/dt & df4/dt
4526A df3/4 M-WINDOW 1 .. 25 Cycle 5 Cycle Measuring Window for df3/dt &
df4/dt
2.7.3
Functions
2.7 Rate-of-frequency-change protection
SIPROTEC 4, 7VE61 and 7VE63, Manual 95
C53000-G1176-C163-3, Edition 10.2017

Siemens SIPROTEC 4 7VE61 Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7VE61
Category	Power distribution unit
Language	English