Settings - Siemens siprotec 7SD610 User Manual

Further application examples exist in the field of power stations. The frequency values
to be set mainly depend, also in these cases, on the specifications of the power sys-
tem/power station operator. In this context, the underfrequency protection also
ensures the power station's own demand by disconnecting it from the power system
on time. The turbo regulator regulates the machine set to the nominal speed. Conse-
quently, the station's own demands can be continuously supplied at nominal frequen-
cy.
Since the dropout threshold is 20 mHz below or above the trip frequency, the resulting
„minimum" trip frequency is 30 mHz above or below the nominal frequency.
A frequency increase can, for example, occur due to a load shedding or malfunction
of the speed regulation (e.g. in a stand-alone system). In this way, the frequency pro-
tection can, for example, be used as overspeed protection.

2.12.3 Settings

Addr. Parameter
3601 O/U FREQ. f1
3602 f1 PICKUP
3603 f1 PICKUP
3604 T f1
3611 O/U FREQ. f2
3612 f2 PICKUP
3613 f2 PICKUP
3614 T f2
3621 O/U FREQ. f3
3622 f3 PICKUP
3623 f3 PICKUP
3624 T f3
3631 O/U FREQ. f4
3632 f4 PICKUP
3633 f4 PICKUP
3634 T f4
7SD610 Manual
C53000-G1176-C145-4
Setting Options
ON: Alarm only
ON: with Trip
OFF
45.50 .. 54.50 Hz
55.50 .. 64.50 Hz
0.00 .. 600.00 sec
ON: Alarm only
ON: with Trip
OFF
45.50 .. 54.50 Hz
55.50 .. 64.50 Hz
0.00 .. 600.00 sec
ON: Alarm only
ON: with Trip
OFF
45.50 .. 54.50 Hz
55.50 .. 64.50 Hz
0.00 .. 600.00 sec
ON: Alarm only
ON: with Trip
OFF
45.50 .. 54.50 Hz
55.50 .. 64.50 Hz
0.00 .. 600.00 sec
2.12 Frequency Protection (optional)
Default Setting
ON: Alarm only Over/Under Frequency Protection
stage f1
49.50 Hz f1 Pickup
59.50 Hz f1 Pickup
60.00 sec T f1 Time Delay
ON: Alarm only Over/Under Frequency Protection
stage f2
49.00 Hz f2 Pickup
57.00 Hz f2 Pickup
30.00 sec T f2 Time Delay
ON: Alarm only Over/Under Frequency Protection
stage f3
47.50 Hz f3 Pickup
59.50 Hz f3 Pickup
3.00 sec T f3 Time Delay
ON: Alarm only Over/Under Frequency Protection
stage f4
51.00 Hz f4 Pickup
62.00 Hz f4 Pickup
30.00 sec T f4 Time Delay
Comments
175