ABB FSK II S +, Руководство по эксплуатации и техническому обслуживанию

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Enter the number of switching operations indicated by the counter in the apparatus logbook
• During operating voltage, no exterior discharges may appear on the surfaces of the electrical
equipment. This can, for example, be determined by characteristic sounds, a clearly perceptible smell of
ozone or visible glowing in the dark
Important!
Never put oil or grease in the guide of the moving contact of the vacuum switching chamber!
8.2.1. Cleaning
If during inspections, the need for cleaning measures is determined, the procedure should be as follows
:
•
If necessary before cleaning, the work area is to be isolated according to the “Safety Regulations”
prescribed by DIN VDE/IEC and secured
• Cleaning general surfaces:
- Dry dust deposits with little adhesion with a soft dry cloth
- Strongly adhering dirt with slightly alkaline household cleaning agent or with Rivolta BWR 210 (Bremer
& Leguil GmbH)
•
Cleaning general surfaces:
- Cleaning the surfaces of insulating parts and conductive components
- Light dirt with halogen-free cleaning agents, such as Rivolta BWR 210
- Heavy dirt on parts of insulation material with a cold cleaner
- After cleaning, wipe away with clean water and dry carefully
8.2.2. Check the Pole Inside Gas Pressure
This check CAN be performed every 5 years
Indicator: 0.2 – 0.8bar (overpressure) at 20°C = OK
If the pressure falls below the prescribed value, the apparatus should be refilled in the factory
The pole is filled with an inert gas (N2). The purpose of this is to fill the space between the vacuum interrupter
and the insulator with a defined and controlled dry atmosphere.
The initial factory pole filling is in the range of 0.5 to 0.8bar at approx. 20°C. To check this, a specific pressure
gauge, which can be obtained as a spare part, must be used.
8.2.2.1. Procedure
•
Dismantle the cover panel of the drive unit
•
Detach the three fastening screws of the quick-action coupling cap and store the cap with the O-ring in a
safe place
• Insert the quick-action coupling of the pressure gauge into the mating piece of the pole and check the
pressure
•
When decoupling, withdraw this quickly so as to leak as small a quantity of gas as possible
• Finally fit cap, gasket and cover panel in order to seal the pole again
Fig. 21 a&b
8.2.3. Checking the Vacuum Interrupter
During operation, due to the switching operations both at short-circuit current as well as at nominal current, the
contact becomes more or less heavily stressed and worn. This wear can be determined theoretically according to
the corresponding electrical cases of loading. However, if the theoretical limit for wear is reached, a check must
be carried out.
Quick-action
coupling cap
Pressure gauge