Settings - Siemens siprotec 7SD5 User Manual

2 Functions
If the voltage transformers are located on the line side, the measuring voltages will be
missing when the line is disconnected. To avoid that the undervoltage levels in these
cases are or remain picked up, the current criterion CURR.SUP.U1< (address 3778)
is switched ON. With busbar side voltage transformers it can be switched OFF. How-
ever, if the busbar is dead, the undervoltage protection will pick up and expire and then
remain in a picked-up state. It must therefore be ensured in such cases that the pro-
tection is blocked by a binary input.

2.17.4 Settings

Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
Addr. Parameter
3701 Uph-e>(>)
3702 Uph-e>
3703 T Uph-e>
3704 Uph-e>>
3705 T Uph-e>>
3709A Uph-e>(>) RESET
3711 Uph-ph>(>)
3712 Uph-ph>
3713 T Uph-ph>
3714 Uph-ph>>
3715 T Uph-ph>>
3719A Uphph>(>) RESET
3721 3U0>(>) (or Ux)
3722 3U0>
3723 T 3U0>
3724 3U0>>
3725 T 3U0>>
3728A 3U0>(>) Stabil.
3729A 3U0>(>) RESET
3731 U1>(>)
3732 U1>
3733 T U1>
338
Setting Options
OFF
Alarm Only
ON
1.0 .. 170.0 V; ∞
0.00 .. 100.00 sec; ∞
1.0 .. 170.0 V; ∞
0.00 .. 100.00 sec; ∞
0.30 .. 0.98
OFF
Alarm Only
ON
2.0 .. 220.0 V; ∞
0.00 .. 100.00 sec; ∞
2.0 .. 220.0 V; ∞
0.00 .. 100.00 sec; ∞
0.30 .. 0.98
OFF
Alarm Only
ON
1.0 .. 220.0 V; ∞
0.00 .. 100.00 sec; ∞
1.0 .. 220.0 V; ∞
0.00 .. 100.00 sec; ∞
ON
OFF
0.30 .. 0.98
OFF
Alarm Only
ON
2.0 .. 220.0 V; ∞
0.00 .. 100.00 sec; ∞
Default Setting
OFF Operating mode Uph-e overvolt-
age prot.
85.0 V Uph-e> Pickup
2.00 sec T Uph-e> Time Delay
100.0 V Uph-e>> Pickup
1.00 sec T Uph-e>> Time Delay
0.98 Uph-e>(>) Reset ratio
OFF Operating mode Uph-ph overvolt-
age prot.
150.0 V Uph-ph> Pickup
2.00 sec T Uph-ph> Time Delay
175.0 V Uph-ph>> Pickup
1.00 sec T Uph-ph>> Time Delay
0.98 Uph-ph>(>) Reset ratio
OFF Operating mode 3U0 (or Ux) over-
voltage
30.0 V 3U0> Pickup (or Ux>)
2.00 sec T 3U0> Time Delay (or T Ux>)
50.0 V 3U0>> Pickup (or Ux>>)
1.00 sec T 3U0>> Time Delay (or T Ux>>)
ON 3U0>(>): Stabilization 3U0-Mea-
surement
0.95 3U0>(>) Reset ratio (or Ux)
OFF Operating mode U1 overvoltage
prot.
150.0 V U1> Pickup
2.00 sec T U1> Time Delay
Comments
7SD5 Manual
C53000-G1176-C169-1