Siemens siprotec 7SD5 User Manual

2 Functions
434
7SD5 Manual
C53000-G1176-C169-1
2.24.11 Set Points (Measured Values)
SIPROTEC
®
4 devices allow set point limits to be set for some measured and metered
values. If during operation a value reaches or exceeds one of these limits, the device
generates an alarm which is displayed as an operational indication. This can be con-
figured to LEDs and/or binary outputs, transferred via the interfaces and interconnect-
ed in DIGSI
®
CFC. In addition you can use DIGSI
®
CFC to configure set points for
further measured and metered values and allocate these via the DIGSI
®
device matrix.
In contrast to the actual protection functions the limit value monitoring function oper-
ates in the background; therefore it may not pick up if measured values are changed
spontaneously in the event of a fault and if protection functions are picked up. Further-
more, since a message is only issued when the limit value is repeatedly exceeded, the
limit value monitoring functions do not react as fast as protection functions trip signals.
2.24.11.1 Limit Value Monitoring
Set points can be set for the following measured and metered values:
• IL1dmd>: Exceeding a preset maximum average value in Phase L1.
• IL2dmd>: Exceeding a preset maximum average value in Phase L2.
• IL3dmd>: Exceeding a preset maximum average value in Phase L3.
• I1dmd>: Exceeding a preset maximum average value of the positive sequence
system currents.
• |Pdmd|> : Exceeding a preset maximum average active power.
• |Qdmd|>: Exceeding a preset maximum average reactive power.
• |Sdmd|> : Exceeding a preset maximum average value of the apparent power.
•|cosϕ|< Falling below a preset power factor.
2.24.11.2 Information List
10102 3U0min = MVT Min. Zero Sequence Voltage 3U0
10103 3U0max = MVT Max. Zero Sequence Voltage 3U0
No. Information Type of In-
formation
Comments
No. Information Type of In-
formation
Comments
- IL1dmd> LV Upper setting limit for IL1dmd
- IL2dmd> LV Upper setting limit for IL2dmd
- IL3dmd> LV Upper setting limit for IL3dmd
- I1dmd> LV Upper setting limit for I1dmd
- |Pdmd|> LV Upper setting limit for Pdmd
- |Qdmd|> LV Upper setting limit for Qdmd
- Sdmd> LV Upper setting limit for Sdmd
- PF< LV Lower setting limit for Power Factor
273 SP. IL1 dmd> OUT Set Point Phase L1 dmd>
274 SP. IL2 dmd> OUT Set Point Phase L2 dmd>
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English