Checking The Circuits Of The Low-Voltage Equipment; Checking High-Voltage Connections; Checking Electrical Connections; Checking Protection Against Environmental Influences - Siemens 8DA Installation Instructions Manual
Medium-voltage switchgear
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Also See for 8DA:
- Operating instructions manual (48 pages) ,
- Operating instructions manual (36 pages)
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Leakage test
Checking the gas quality
Monitoring the gas pres-
sure
Checking device connec-
tions
Checking auxiliary cable
connections
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!
24 hours after having filled the gas compartments, check all flange connections
mounted at site and all SF
!
For leak detection, use an SF
!
In case of gas leaks, these points must be disassembled and sealed again.
!
Check the gas quality 24 hours after filling the gas compartments.
!
Determine the maximum dew point with a gas hygrometer. Dew-point
o
temperature: -15
!
Check the air content in the SF
content: 5%.
!
If the gas quality is not achieved, the gas filling must be cleaned with the
maintenance unit.
!
After commissioning, check the gas pressures daily for a period of two weeks. If the
gas pressures drop within this period of time, please inform the Siemens Service
Centre.
!
After this period of time, check the gas pressures according to the maintenance
instructions.
13.2
Checking the circuits of the low-voltage equipment
!
Check the current transformer circuits according to the circuit diagrams.
!
Check the voltage transformer circuits up to the m.c.b. or the fuse for short-circuits.
!
Check the functions of all protection devices with a secondary test unit for relays.
13.3
Checking high-voltage connections
!
Check the tightening torque of the bolts of the cable plugs according to the
manufacturer's instructions.
!
Check the earthing of the cable termination on all high-voltage cables.
13.4
Checking electrical connections
!
Check the screw-type connections of the devices in the low-voltage compartment at
random with the torque wrench.
!
Check the plug-in connections of the devices in the low-voltage compartment at
random.
!
Check auxiliary cable connections on devices and terminal blocks at random.
!
Check all auxiliary cable connections on current transformer terminals including
slides and jumpers in the low-voltage compartment.
!
Check the designation labels on the terminal blocks.
!
Replace missing labels using the information given in the circuit diagrams.
13.5
Checking protection against environmental influences
For touching up doors and front parts there is a touch-up set (spatula and paint) available,
as well as a paint pen.
!
Touch up surface damages.
-pipes for leaks.
6
-leak detector.
6
C.
-gas with a gas-percentage meter.Maximum air
6
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47
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