•
Check of the cubicle and the devices for damage
•
Check of earthing of the cabinet and the device
•
Check the external cabling for condition and completeness.
Acquisition of Technical Power System Data
For checking synchronization and protection parameterization (allocation and settings) in accordance with
power system requirements, recording of technical data of the individual components is necessary in the
primary system. This includes, among others, the generator and voltage transformer.
On deviations from the planned data the settings values at the device must be corrected accordingly.
Analog Inputs
Checking of the voltage transformer circuits includes the following items:
•
Acquisition of technical data
•
Visual check of transformers, e.g. for damage, assembly position, connections
•
Check cabling in accordance with circuit diagram
Further tests are under certain circumstances necessary in accordance with contract:
•
Insulation measurement of cable
•
Measurement of transformation ratio and polarity
•
Burden measurement
•
If test switches are used for the secondary check, their function must also be checked.
Binary Inputs and Outputs
For more information see also Section
•
Setting of binary inputs:
–
Check and match jumper allocation for pickup thresholds (see Section
–
Check the pickup threshold – if possible – with a variable DC voltage source
•
Check the tripping circuits from the command relays and the tripping lines down to the various compo-
nents (circuit breakers, excitation circuit, emergency tripping, switchover devices etc.)
•
Check the signal processing from the signal relays and the signal lines down to the station control and
protection system; to do so, energize the signal contacts of the parallel switching device and check the
texts in the station control and protection system
•
Check the control circuits from the output relays and the control lines down to the circuit breakers and
disconnectors etc.
•
Check the binary input signals from the signal lines down to the paralleling device by activating the
external contacts
Mounting and Commissioning
3.2 Checking Connections
168
SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017
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