NACH is an ISO 9001:2008 certified firm. Its factory has an established Quality Assurance Program. The established Quality Assurance Program is continuously improved and audited. The QC organization is headed by Dr. N. A. Chaudhary, who is designated as Director, with responsibility for QC in charge assisted by trained staff and engineers.
(A) Following tests as per IS/IEC standards can be conducted in house at NACH Lab:
(a) Dielectric Testing of transformer oil
(b) Moisture in Transformer oil Testing (Karl Fischer)
(c) Particle Testing for transformer oil
(d) Gas Content Testing
(e) Transformer oil tan DELTA and Insulation Resistance
(f) Insulation withsand test, HV Test upto 2kV for control panel/equipments
(g) Vacuum Testing equipment
(h) Standard Measurement Scales like Vernier, Micrometer etc.
(B) Details of calibration of laboratory/ Test Equipment/ Gauges, indicated above
| (a) Method of calibration | NABL Approved lab |
| (b) Frequency of calibration | Yearly |
| (c) System to ensure that calibration of above equipments does not fall overdue | Routine Audits |
(C) Following are details for source of procurement of raw materials, important bought outs and steps taken to ensure their quality:
| (a) Procurement of raw material | By reputed manufacturer/dealer with Material Test Certificates |
| (b) Procurement of bought-outs | From original manufacturer /dealer/distributor/ agent. |
| (c) Steps taken to ensure quality | Checking of Test Certificates, else conducting third party/NABL lab testing |
(D) Details of Inspection / checks done on material during various stages of the above manufacturing process:
| (a) Inspection of materials | Visual for damages, cracks, bends, scratches at our works, followed by verification of test certificates by OEM/suppliers/vendors |
| (b) Checking of materials | Checking as per requirement and order at our works |
| (c) Physical Checking of materials | Physical Checking of materials for dimensions, sizes, quantity at our works. |
| (d) Testing for correctness | Testing for correctness by putting it on assemblies/ sub- assemblies/ test rigs |
Acceptable values for parameters inspected during above stage checks are laid down. In case of parameters not falling in permissible limits, necessary action is taken. Parameters are generally kept with sufficient safety factors and acceptable tolerance limits. Each component is tested and document is prepared. If results are acceptable, it is put in service. However, if any component is not as per the acceptable values it is returned to manufacturer for replacement/ correction. There is a systematic approach and documentation for the above procedure.
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