Manual XRI1-ER
Woodward
TD_XRI1-ER_12.03, Rev. C
23
6. Operations and settings
6.1 Setting procedure
After push button <SELECT/RESET> has been pressed, always the next measuring value is indicated. Firstly
the operating measuring values are indicated and then the setting parameters. By pressing the <ENTER> push
button the setting values can directly be called up and changed.
6.1.1 Voltage transformer connection for residual voltage measuring (3pha/e-n/1:1)
Depending on the connection of the voltage transformer of relays three possibilities of the residual voltage
measurement can be chosen (see chapter 4.4).
6.1.2 Pickup value for residual voltage U
E
Regardless of the preset earth current, an earth fault is only identified if the residual voltage exceeds the set
reference value. This value is indicated in volt.
6.1.3 WARN/TRIP changeover
A detected earth fault can be parameterized as follows:
a) "warn" only the alarm relay trips
b) "TRIP" the trip relay trips and tripping values are stored.
6.1.4 Pickup current for earth fault element (I
E>
)
The setting value for this parameter that appears on the display is related to the nominal current (IN) of the re-
lay.
This means: pickup current (Is) = displayed value x nominal current (I
N
) e.g. displayed value = 0.20 then, Is =
0.2 x I
N
. The pickup value of the device XRI1-XR refer