Horstmann ComPass B - Voltage Calibration Procedure

Instructions for Use
ComPass B 4023841-001
Short-circuit trip current → Settings I>>
Short-circuit current delay time → Settings tI>>
Earth fault trip current → Settings IE>
Earth fault delay time → Settings tIE>
Time reset → Settings tReset
Language → Settings Language
Short-circuit current transformer → Settings CT
Earth fault current transformer → Settings SUM-CT
Frequency → Settings Frequency
Rated voltage → Settings VNom
Neutral earthing → Settings NeutralPt
Relay type → Settings Type
Relay mode → Settings Mode
Parameter setting in the ComPass BTable 5:
Voltage calibration5.2.
Step 1:
G
Voltage calibration is required after ComPass B has been installed in the switch-gear and the
switch-gear has been energised.
Below voltage calibration is carried out using the example of a 11 kV network.
Step 2:
Voltage calibration is possible only, if medium voltage is applied to the switch-gear. The bushings of
the switchgear or the capacitive insulators on the primary side must be connected to a three-phase
medium voltage.
G
If there is no precise reference voltage available, ComPass B must be calibrated using the
network voltage with the impending power supply. In this case, continue with step 4.
Setting the medium-voltage parameterStep 3:
Example: 11 kV system
U
n
= 11 kV resp.
U
LE
= U
n
/√3 = 6,35 kV
Software for the determination of data settings (example).Figure 21:
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Dipl.-Ing. H. Horstmann GmbH