General Power System Data (Power System Data 1); Setting Notes - Siemens siprotec 7SD610 User Manual

2 Functions
Addr. Parameter
140 Trip Cir. Sup.
141 REF PROT.
142 Therm.Overload
143 TRANSFORMER
144 V-TRANSFORMER
148 GPS-SYNC.
2.1.2

General Power System Data (Power System Data 1)

The device requires some plant and power system data in order to be able to adapt its
functions accordingly, dependent on the actual application. The data required include
for instance rated data of the substation and the measuring transformers, polarity and
connection of the measured quantities, if necessary features of the circuit breakers,
and others. Furthermore, there is a number of settings associated with several func-
tions rather than a specific protection, control or monitoring function. The Power
System Data 1 can only be changed from a PC running DIGSI and are discussed in
this section.
2.1.2.1

Setting Notes

In address 201 CT Starpoint the polarity of the current transformers must be en-
Current
Transformer tered, in other words, the location of the CT star-point (Figure 2-1). The setting defines
Polarity the measuring direction of the device (current in line direction is defined as positive at
both line ends). The reversal of this parameter also reverses the polarity of the residual
current input I
Figure 2-1
32
Setting Options
Disabled
1 trip circuit
2 trip circuits
3 trip circuits
Disabled
Enabled
Disabled
Enabled
NO
YES
Not connected
connected
Enabled
Disabled
.
E
Polarity of current transformers
Default Setting
Disabled Trip Circuit Supervision
Disabled Restricted earth fault protection
Disabled Thermal Overload Protection
NO Transformer inside protection
zone
connected Voltage transformers
Disabled GPS synchronization
Comments
7SD610 Manual
C53000-G1176-C145-4