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Maintaining a 03-1

3. Integrated maintenance

According to that seen previously, giving the substation maintenance guidance to the availability of equipment, and taking into account work system in Power Systems (transmission and distribution, mainly), maintenance of substations should be built, ie look at maintenance as a whole, whose components are in preventive maintenance, corrective and proactive.

3.1. Preventive maintenance.

substation Preventive maintenance is divided into two components:

- Visual inspection.
- Preventive maintenance scheduled or systematic.

3.1.1. Visual inspection.

This type of maintenance is done on a monthly basis, without de-energizing the line, do not use tools or instruments in most cases, and as its name suggests is only visual inspections. Its aim is to visually inspect the external condition of equipment, scoring on a form the results of that inspection.

The forms have a box for each phase, ie three for the teams, where points are scored for the team outside the state, according to the following criteria:

There are certain items that are observed when a visual inspection, and records the status of these items in the forms of inspection, as mentioned above. For equipment of a substation, we have:

• power transformer: civil Construcciones, Tank, grounding, porcelains of the bushings, cleaning, conservator tank, radiators, fans, silica, Buchholz relay changer with taps, gauge, gauge, oil level, temperature indicator, control box, tertiary oil temperatures and coils.
• switches (oil, SF6, vacuum, air): civil foundations, structure, grounding, porcelain, status indicator, command, terminal blocks, heating, leaks, oil leaks, gas pressure (N2) , number of operations, sealing.
• transformers (CT's, PT's, CCPD's): civil foundation, structure, grounding, porcelains, oil sight glass, oil level, heater box, terminal blocks, level of N2 capacitor.
• Disconnectors: civil foundations, structure, grounding, porcelain, leakage control, relay ground.
• Lightning: civil foundations, structure, grounding, porcelain, grading ring, number of downloads, power connection.
• Capacitor bank: Foundations civilians, support structure, grounding, safety net, signs, insulators connections for leaks.
• Battery Bank: support structure, grounding, ventilation, blood bank, each cell voltage, level, temperature, density.

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