Recommendations and Conditions
Routine maintenance will depend on the conditions to which the unit is subjected and to the relevant codes and practice. Periodic inspection of the substation and equipment will be necessary to establish the conditions to which the units are subjected to.
Recommendations and Conditions
|
Maintenance |
Ideal conditions |
Standard conditions |
Aggressive conditions |
|---|---|---|---|
|
Gas enclosure |
No attention |
No attention |
No attention |
|
Housing interior (mechos and so on.) |
No attention |
Periodic inspection |
Every 5 years |
|
Housing |
Periodic inspection |
Every 5 years |
Every 2 years |
|
Protection system |
Every 5 years |
Every 5 years |
Every 5 years |
Ideal Conditions
Unit installed and commissioned in accordance with the manufacturer’s instructions. Following are the environmental conditions:
-
Indoors, completely protected from the weather.
-
Humidity below 40% and no dripping water.
-
Minimal dust and air circulation.
-
Ambient temperature between -25 °C to +40 °C.
-
No contact with any chemical agents (for example, salt).
-
No infestation of any animal life (for example, insects).
-
No contact with any plant life (for example, mold).
-
No earth movements.
-
No damage to the unit of any kind.
Following are the operational conditions:
-
No mal-operation of any kind.
-
No abnormal high number of breaking operations.
-
No abnormal high number of faults.
-
No over-voltage or over-current (above rating).
Standard Conditions
Unit installed and commissioned in accordance with the manufacturer’s instructions. Following are the environmental conditions:
-
Unit installed and commissioned in accordance with the manufacturer’s conditions.
-
Humidity below 60%.
-
Unit is designed for indoors or outdoors but must not be subjected to regular extremes of weather for example, heavy rain storms, dust storms, heavy snow and ice, flooding, temperature cycles greater than 55°C or less than -25°C, dense coastal fog or acid rain.
-
No regular or thick covering of leaves or other debris.
-
No contact with any chemical agents.
-
No infestation of animal or plant life.
-
No earth movements.
-
No damage to the unit of any kind.
Following are the operational conditions:
-
No mal-operation of any kind.
-
No abnormal high number of breaking operations graph.
-
No abnormal high number of faults graph.
-
No over-voltage or over-current (above rating).
Post Fault Maintenance
We recommend that after 50% of its rated fault operations, check the following:
-
Gas pressure.
-
Trip opening time.
-
Contact resistance.
The maximum number of fault interruptions can be calculated from the interrupting capacity graph.