Measurement - Siemens SIPROTEC 7SK80 Manual
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- Manual (512 pages) ,
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2.18.3
Measurement
A series of measured values and the values derived from them are constantly available for call up on site, or
for data transfer.
Applications
• Information on the actual status of the system
• Conversion of secondary values to primary values and percentages
Prerequisites
Except for secondary values, the device is able to indicate the primary values and percentages of the measured
values.
A precondition correct display of the primary and percentage values is the complete and correct entry of the
nominal values for the instrument transformers and the protected equipment as well as current and voltage
transformer ratios in the ground paths when configuring the device. The following table shows the formulas
which are the basis for the conversion of secondary values to primary values and percentages.
When using the capacitive voltage connection, or with the connection types Vab, Vbc or Vab, Vbc, Vx of
the voltage transformers (address 213 VT Connect. 3ph), the measured values for power P, Q, S, power
factor, energy and the derived values, such as mean values etc. are not available.
When using the capacitive voltage connection, the measured values for power P, Q, S, power factor, energy
and the derived values, such as mean values etc. are not available.
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
Functions
2.18 Auxiliary Functions
255
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