Siemens 6MD86 - Commissioning Hints for Voltage Control; Secondary Tests; General; Checking the Transformer Tap Position

Commissioning Hints for Voltage Control
Secondary Tests
General
Secondary tests can never replace the primary tests described in the following (10.10.2 Primary Tests),
because you cannot exclude connection faults.
Secondary tests are used for the following purposes:
•
Checking the setting values
•
Checking the correct reaction of the protection function, limits, indications, blocking, and voltage control
functions
•
Checking the engineering (for example, routing of the respective logic signals, display images with meas-
ured values and CFC logics)
•
With parallel control check of the communication
Note the following information during the secondary tests:
i
i
NOTE
For tests with secondary test equipment, make sure that no other measurands are connected and that the
trip commands to the circuit breakers are interrupted. Otherwise, the circuit breaker may be activated.
If the tap-changer position is not updated manually during the secondary test, you must deactivate the tap-
changer supervision. Otherwise, the voltage control is blocked after every switching procedure.
i
i
NOTE
Once you have completed the secondary test, you must activate the tap-changer supervision again.
Checking the Transformer Tap Position
General
For this test, the transformer must be de-energized, that is, circuit breakers and disconnectors are switched
off/opened, protected against re-energizing and the maintenance grounding switch should be closed.
10.10
10.10.1
10.10.1.1
10.10.1.2
Functional Tests
10.10 Commissioning Hints for Voltage Control
1076 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017