Thursday, June 4, 2020

Thermographic Imaging

SPA confirms that the thermal imaging scanning process will incorporate all electrical boards including all main switchboards and sub-boards, low voltage switchboard section of all pad mount substations and pole mounted electrical boards, and all main mechanical control boards including air conditioning control plant, any electrical motor within the HVAC plant room.

SPA thermal imaging inspection and report system is configured into a layout which provides clear and simple format which can be understood by non-technical person, and shall as a minimum contain the following information dependent of the client. In Site location.

  • Building and location of the equipment being tested.
  • Asset Barcode No.
  • Equipment Designation No.
  • Type of equipment being tested.
  • Inspection date and time of the inspection.
  • Camera serial number used to carry out the inspections, NATA certification number.
  • Thermographic Image.
  • Visual Image complimenting the Thermographic image.
  • Define corrective action.
  • Comments on the problems identified and required remedial actions.

SPA Trade Services wishes to confirm that our thermography services are in-line with ASTM E1934 and we can evidence compliance on request. We also confirm compliance with Practice SNT-TC-1A 2006. SPA's Thermographers are certified to a minimum Level 1 in accordance to the requirements as specified in ANSI/ASTN CP-105 Topical Outlines for Qualifications of Non-destructive Testing Personnel. Interpretation and evaluation of results can be conducted by Level 2 thermographer Australian Institute non-destructive testing certification (AINDT). Our findings are categorised into industry accepted priority ratings based upon experience and plant/equipment knowledge, with cognisance taken of only the effected item of the plant.

Please refer to thermal images identifying hot spots not visible to the naked eye.

Thermographic Camera Requirements

SPA confirms that our thermograph cameras can take both thermal and analogue image, and is designed to bring to light and pinpoint any high-resistance problems within the electrical board. At a minimum, our camera is compliant with the below:

  • Camera minimum resolution: 320 x 240 pixels detector size with an analogous resolution of 3.2 mega-pixel /digital CCD camera.
  • Thermal sensitivity: Noise equivalent temperature difference NETD of 0.08° C at30° C.
  • Camera accuracy: +/- 1° C. or ± 1% of reading.
  • Emissivity Correction: Variable from 0.01 to 0.10 (in 0.01 increments).
  • Camera field of view: 24 deg & 45 deg.
  • Camera maximum age: 5 years.
  • Camera calibration: Calibration certificate by manufacturer or NATA certified company.

All work will be carried out within the following standards:

  • NSW Occupational Health & Safety Act 2000.
  • NSW Occupational Health & Safety Regulation 2006.
  • WorkCover NSW Electrical Equipment Risk Assessment.
  • WorkCover NSW, Code of Practice Electrical equipment inspection checklist.
  • WorkCover Code practice – Low Voltage Electrical work.
  • Service & installation Rules associated with the relevant electricity authority.
  • Building Code of Australia BCA.
  • Australian Standards, AS/NZS3000:2007, AS/NZS3017:2007 and AS/NZS3019:2007.
  • Australian Standards, AS 3760:2003 In –service safety inspection & testing of electrical equipment.
  • Australian Standards, AS 3190: 2003 Approval & testing specification residual current devices.
  • Australian Standards, AS 5762:2005 In service safety inspection & testing - repair electrical equipment.
  • Australian Standards, AS 3199:2002 Approval & test specification for cords extension sets.
  • Australian Standards, AS 3350.2.25 Safety of household & similar appliances – Particular requirements for microwave ovens.
  • Australian Standards, AS 3998.2006 Non-destructive testing–Qualification & Certification of personnel.
  • Provide all other Testing as required by the ANSI/NETA MTS – 2007 Maintenance Testing Specification for Electrical Power Distribution Equipment

Thermal Imaging Reports

  • Schedule of Completed thermal image testing will include a detailed report of the results and findings of the thermal imaging and include Thermal Imaging and Visual Image complimenting the Thermographic image photos of each board and associated equipment.
  • The report will include details of proposed work to be carried out to rectify any problems identified during the thermal imaging review.
  • Provide a priority of Services and a time frame to carry out such Services.
  • Schedule of outstanding thermal image testing will include a list of outstanding testing.
  • The report will clearly identify the date, time and duration of the work, the technician(s) who carried out the tests and the equipment used for the testing.

Examples of Thermal Imaging/Electrical Faults Repair Recommendations