INSPECTION AND MAINTENANCE
REV6 /REV3 OI 248 (EN) 69
9.1 Ordering Accessories and Replacement Parts
The following data are required for an order:
- Type designation on nameplate
- Serial number on nameplate
- Instruction manual number on cover
- Figure number and position number in the figure
- Part description
- Quantity required
9.2 Inspection
The circuit breaker may remain in operation during inspection.
9.2.1 Visual Inspection
• Check the circuit breaker carefully for damage or corrosion. In
particular, check the insulators from the ground for possible
damage.
• If corrosion is detected, take steps to prevent or control corrosion.
• Check the ventilation ports and vents in the mechanism cabinet to
make sure they are clear. Remove any blockages.
9.2.2 Anti-Condensation Heater
Check the heat dissipation from the anti-condensation heater. To
do so, place a contact thermometer on the anti-condensation hea-
ter and measure the temperature rise.
9.2.3 Checking Gas Pressure
Check the density monitor indicator. If the indicator is not in the
green area, top up with gas until rated pressure is reached (see
“Filling the Breaker with Gas” on Page 48).
Danger due to electric shock.
Therefore:
- Never reach into the high voltage insulation area of the
circuit breaker.
- Never touch the contacts of the circuit breaker control
system.
Follow all regional and operator-specified safety precautions.
The anti-condensation heating unit gets hot during operation.
It can burn skin or clothing.
Therefore:
- Never touch the heating unit directly.
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