Annual HV Maintenance

• Conducted on

  Date

• Prepared by

• Site

  Atherstone

  Landmead

  Paddock Wood

  Southam

  Turweston
• Location
  Address

• Winter / Summer?

  Winter

  Summer

Substation Summary

• Substation Reference

• Inspection Carried Out By

• Conducted On

  Date

• Tx Type

• Size (kVA)

• Serial Number

Inspection as per manual

• Check Gaskets and sealing at the transfomer and if necessary, retighten screws/bolts slightly. Include pictures.

  Yes

  No

  N/A

• Keep insulators clean. Provide pictures.

  Yes

  No

  N/A

• Remove rust and recoat/repair the surface concerned. Include pictures.

  Yes

  No

  N/A

Annual Inspection

• Check status of visual and acoustic indicators. Provide images.

  Yes

  No

  N/A

• Check dielectric stiffness (once every 5 years). Provide images.

  Yes

  No

  N/A

• Check moisture content of oil (once every 5 years). Provide images.

  Yes

  No

  N/A

• Visual inspection of termination sleeves. Include pictures.

  Yes

  No

  N/A

• Visually inspect the earthing electrodes. Include pictures.

  Yes

  No

  N/A

• Check condition of protection. Include pictures.

  Yes

  No

  N/A

• Visual inspection sealing of all joints. Include pictures.

  Yes

  No

  N/A

• Inspection of mechanical circuit breakers. Provide images.

  Yes

  No

  N/A

• Status and operation of the circuit breaker interlocks. Provide images.

  Yes

  No

  N/A

• Lubrication of circuit breakers. Include pictures.

  Yes

  No

  N/A

• Visual inspection of instrument transformer. Provide images.

  Yes

  No

  N/A

• Press contact and review of instrument transformer connections. Provide images.

  Yes

  No

  N/A

• Check condition of insulators and bus bars. Include pictures.

  Yes

  No

  N/A

• Check status of insulators, connections and bus bars. Include pictures.

  Yes

  No

  N/A

• Testing of earth connections. Provide images and results.

• Check operation of protection relays. Provide images.

  Yes

  No

  N/A

• "Check alarm and trip signals of temperature. Include pictures.

  Yes

  No

  N/A

• Check operation of auxiliary relays. Include pictures.

  Yes

  No

  N/A

• Check operation of alarms. Provide images.

  Yes

  No

  N/A

• Visual inspection of transformers. Provide images.

  Yes

  No

  N/A

• Check for oil leaks (if appropriate), strange noises and overheating. Include pictures.

  Yes

  No

  N/A

• Visual inspection of grounding. Provide images.

  Yes

  No

  N/A

• Cleaning of transformer surroundings. Include pictures.

  Yes

  No

  N/A

• Inspection and checking of transformers. Provide images.

  Yes

  No

  N/A

• Earthing insulation measurement. Provide images and results.

  Yes

  No

  N/A

• State of paint and oxidation. Sanding and painting with anti-oxidant paint (if required). Include pictures.

  Good

  Fair

  Poor

  N/A

• Functional tests of auxiliary circuits (cooling system, switch, protections, Buchholz, thermometer etc.). Provide images.

  Yes

  No

  N/A

• Check continuity of grounding mesh. Include pictures.

  Yes

  No

  N/A