Testing Measured Values During Operation - Siemens SIPROTEC 5 Operation Manual

NOTE
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Using wiring modifications switch the primary system to the de-energized state.
You can do tests specific to protection functions via the operational measured values. To do this, click the
Function meas. values tab. In a differential protection function, the differential currents must be 0 and the
corresponding restraint current available.
You get a graphical visualization if you click Test → Protection function. Apart from the set characteristics,
you see the functions relevant to protection.
To be 100 % sure about the direction setting in a directional overcurrent protection, make use of the test
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functionality integrated in the protection function.
Place the protection function in test mode by activating the binary input signal (>Test of the
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direction).
Analyze the indication behavior of the protection function according to the selected setting.
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Deactivate the test mode by terminating the binary signal again.
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With active protection you can continue the testing of the switching devices. Check the on and off
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switching of the circuit breaker.
With the circuit breaker switched off, check the activation of disconnectors and the corresponding inter-
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locking mechanisms.

Testing Measured Values During Operation

7.5.3
Checking the operational measured values for plausibility is a simplified test of components of the primary
system (transformer, wiring) and of secondary equipment (measured-value acquisition including measured-
value processing). You can set a default display in the device display that also contains the measured values.
Several measured-value windows are preadjustable and can be further switched if needed. Check these meas-
ured values for plausibility.
If you wish to check measured values more precisely, follow the device menu and navigate to the corre-
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sponding measured values.
Alternatively, you can set parameters for a function key so that directly jumping to the desired menu is
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possible.
Online operation with DIGSI 5 provides a good complete overview. You will find the relevant measured values
in Measurements for the respective function group. If there is a communication connection to systems
control, measured values that the operational crew can verify are also transmitted here.
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-7, Edition 06.2016
Commissioning
7.5 Primary Tests
103