Siemens siprotec 7SD5 User Manual

2 Functions
338
7SD5 Manual
C53000-G1176-C169-1
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 Setting Options Default Setting Comments
3701 Uph-e>(>) OFF
Alarm Only
ON
OFF Operating mode Uph-e overvolt-
age prot.
3702 Uph-e> 1.0 .. 170.0 V; ∞ 85.0 V Uph-e> Pickup
3703 T Uph-e> 0.00 .. 100.00 sec; ∞ 2.00 sec T Uph-e> Time Delay
3704 Uph-e>> 1.0 .. 170.0 V; ∞ 100.0 V Uph-e>> Pickup
3705 T Uph-e>> 0.00 .. 100.00 sec; ∞ 1.00 sec T Uph-e>> Time Delay
3709A Uph-e>(>) RESET 0.30 .. 0.98 0.98 Uph-e>(>) Reset ratio
3711 Uph-ph>(>) OFF
Alarm Only
ON
OFF Operating mode Uph-ph overvolt-
age prot.
3712 Uph-ph> 2.0 .. 220.0 V; ∞ 150.0 V Uph-ph> Pickup
3713 T Uph-ph> 0.00 .. 100.00 sec; ∞ 2.00 sec T Uph-ph> Time Delay
3714 Uph-ph>> 2.0 .. 220.0 V; ∞ 175.0 V Uph-ph>> Pickup
3715 T Uph-ph>> 0.00 .. 100.00 sec; ∞ 1.00 sec T Uph-ph>> Time Delay
3719A Uphph>(>) RESET 0.30 .. 0.98 0.98 Uph-ph>(>) Reset ratio
3721 3U0>(>) (or Ux) OFF
Alarm Only
ON
OFF Operating mode 3U0 (or Ux) over-
voltage
3722 3U0> 1.0 .. 220.0 V; ∞ 30.0 V 3U0> Pickup (or Ux>)
3723 T 3U0> 0.00 .. 100.00 sec; ∞ 2.00 sec T 3U0> Time Delay (or T Ux>)
3724 3U0>> 1.0 .. 220.0 V; ∞ 50.0 V 3U0>> Pickup (or Ux>>)
3725 T 3U0>> 0.00 .. 100.00 sec; ∞ 1.00 sec T 3U0>> Time Delay (or T Ux>>)
3728A 3U0>(>) Stabil. ON
OFF
ON 3U0>(>): Stabilization 3U0-Mea-
surement
3729A 3U0>(>) RESET 0.30 .. 0.98 0.95 3U0>(>) Reset ratio (or Ux)
3731 U1>(>) OFF
Alarm Only
ON
OFF Operating mode U1 overvoltage
prot.
3732 U1> 2.0 .. 220.0 V; ∞ 150.0 V U1> Pickup
3733 T U1> 0.00 .. 100.00 sec; ∞ 2.00 sec T U1> Time Delay
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English