Functions
2.14 Temperature Detection via RTD Boxes
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
201
Figure 2-68 Logic diagram of the temperature processing for RTD-box 1
2.14.2 Setting Notes
General
Temperature detection is only effective and accessible if this protective function was allocated to an interface
during configuration (Sub-section 2.1.1). At address 190 RTD-BOX INPUT the RTD-box(es) is allocated to the
interface at which it will be operated (e.g. port C). The number of sensor inputs and the communication mode
were set at address 191 RTD CONNECTION. The temperature unit (°C or °F) was set in the Power System Data
1 at address 276 TEMP. UNIT.
If the RTD-boxes are operated in half-duplex mode, the flow control (CTS) must be selected by means of a
plug-in jumper (see Section 3.1.2 in Chapter „Mounting and Commissioning“) „/CTS enabled by /RTS “.
Device Settings
The settings are the same for each input and are here shown at the example of measuring input 1.
Set the type of temperature detector for RTD 1 (temperature sensor for measuring point 1) at address 9011
RTD 1 TYPE. You can choose between , Ni 120 Ω and Ni 100 Ω. If no temperature detector is available
for RTD 1, set RTD 1 TYPE = Not connected. This parameter can only be changed in DIGSI under „Display
Additional Settings“.
Address 9012 RTD 1 LOCATION informs the device about the mounting location of RTD 1. You can choose
between Oil, Ambient, Winding, Bearing and Other. The selection is not evaluated in the device but only
serves the purpose of providing information about the medium in which the temperature measurement is
carried out. This parameter can only be changed in DIGSI under „Display Additional Settings“.
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