Set Points For Measured Values; Description; Setting Notes - Siemens SIPROTEC 4 7SJ61 Manual

Functions
2.17 Auxiliary Functions
No. Information
844 I1dmdMax
851 Ia Min=
852 Ia Max=
853 Ib Min=
854 Ib Max=
855 Ic Min=
856 Ic Max=
857 I1 Min=
858 I1 Max=
1058 Θ/ΘTrpMax=
1059 Θ/ΘTrpMin=
2.17.6

Set Points for Measured Values

SIPROTEC 4 devices facilitate the setting of setpoints for some measured or metered values. Should any of
these setpoints be reached, exceeded or undershot during operation, the device issues a warning which is
indicated in the form of an operational message. This can be configured to LEDs and/or binary outputs, trans-
ferred via the ports and interconnected in DIGSI CFC. Additionally, DIGSI CFC can be used for the configuration
of set points for further measured and metered values and to allocate these via the DIGSI device matrix. In
contrast to the actual protection functions, the setpoints monitoring function operates 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. As a message is only issued upon multiple exceeding of the setpoints, such
setpoint monitoring does not react as fast as the trip signals of protection functions.
Applications
•
This monitoring program works with multiple measurement repetitions and lower priority than the
protection functions. For that reason, in the event of a fault it may not respond to fast measured value
changes before protection functions are started and tripped. This monitoring program is not suitable for
blocking protection functions.
2.17.6.1

Description

Setpoint Monitoring
Upon delivery, the following individual setpoint levels are configured:
•
ΙAdmd>: Exceeding a preset maximum average value in Phase A.
•
ΙBdmd>: Exceeding a preset maximum average value in Phase B.
•
ΙCdmd>: Exceeding a preset maximum average value in Phase C.
•
Ι1dmd>: Exceeding a preset maximum average positive sequence current.
•
ΙL<: Falling below a preset current in any phase.
2.17.6.2

Setting Notes

Setpoints for Measured Values
Setting is performed in the DIGSI Configuration Matrix under Settings, Masking I/O (Configuration Matrix).
Set the filter "Measured and Metered Values Only" and select the configuration group "Setpoints (LV)". Here,
default settings may be changed or new setpoints defined.
Settings must be applied in percent and usually refer to nominal values of the device.
210
Type of Comments
Informa-
tion
MVT I1 (positive sequence) Demand Maximum
MVT Ia Min
MVT Ia Max
MVT Ib Min
MVT Ib Max
MVT Ic Min
MVT Ic Max
MVT I1 (positive sequence) Minimum
MVT I1 (positive sequence) Maximum
MVT Overload Meter Max
MVT Overload Meter Min
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016