Siemens SIPROTEC 7UT613 series, Руководство пользователя

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2 Functions
266
7UT613/63x Manual
C53000-G1176-C160-2
The following example illustrates a setting of the frequency protection for a generator
that indicates a delayed warning at approx. 1 % decreased frequency. In case of a
further frequency decrease, the generator is disconnected from the network and finally
shut down.
Minimum Voltage The frequency protection is blocked on undershooting the minimum voltage
U MIN
.
The recommended value is approx. 65 % U
N
. The setting value is based on phase-
phase voltages. If the frequency protection of one side of the main protected object,
the value must be set as reference value under address
5652 U MIN
, e.g. 0.65. When
assigned to a measuring location the value of phase-phase voltage must be set under
address
5651 Umin
in Volt , e.g. 71. V at U
N sec
= 110 V (65 % of 110 V). The
minimum voltage threshold can be deactivated by setting this address to 0. However,
no frequency measuring is possible below approx. 5 V (secondary) so that the fre-
quency protection can no longer function.
2.16.3 Settings
Level
Changes to
CPU modules
Setting at f
N
=
Delay
50 Hz 60 Hz 16.7 Hz
f< Warning 49.50 Hz 59.50 Hz 16.60 Hz 20.00 s
f<<
Disconnection
from the network
48.00 Hz 58.00 Hz 16.00 Hz 1.00 s
f<<< Shutdown 47.00 Hz 57.00 Hz 15.70 Hz 6.00 s
f> Warning and trip 52.00 Hz 62.00 Hz 17.40 Hz 10.00 s
Addr. Parameter Setting Options Default Setting Comments
5601 O/U FREQUENCY OFF
ON
Block relay OFF Over / Under Frequency Protec-
tion
5611 f< 40.00 .. 49.99 Hz; 0 49.50 Hz Pick-up frequency f<
5612 f<< 40.00 .. 49.99 Hz; 0 48.00 Hz Pick-up frequency f<<
5613 f<<< 40.00 .. 49.99 Hz; 0 47.00 Hz Pick-up frequency f<<<
5614 f> 50.01 .. 66.00 Hz;
∞
52.00 Hz Pick-up frequency f>
5621 f< 50.00 .. 59.99 Hz; 0 59.50 Hz Pick-up frequency f<
5622 f<< 50.00 .. 59.99 Hz; 0 58.00 Hz Pick-up frequency f<<
5623 f<<< 50.00 .. 59.99 Hz; 0 57.00 Hz Pick-up frequency f<<<
5624 f> 60.01 .. 66.00 Hz;
∞
62.00 Hz Pick-up frequency f>
5631 f< 10.00 .. 16.69 Hz; 0 16.50 Hz Pick-up frequency f<
5632 f<< 10.00 .. 16.69 Hz; 0 16.00 Hz Pick-up frequency f<<
5633 f<<< 10.00 .. 16.69 Hz; 0 15.70 Hz Pick-up frequency f<<<
5634 f> 16.67 .. 22.00 Hz;
∞
17.40 Hz Pick-up frequency f>
5641 T f< 0.00 .. 100.00 sec;
∞
20.00 sec Delay time T f<
5642 T f<< 0.00 .. 600.00 sec;
∞
1.00 sec Delay time T f<<
5643 T f<<< 0.00 .. 100.00 sec;
∞
6.00 sec Delay time T f<<<