NO: E-29021|61936|2024|Electrical(HQ)                                                                                                                                                                                                                                    Dhanbad, Date: 02.09.2024

                                                         DGMS APPROVAL NO.560 of 2007(Renewal approval)

From

Director General of Mines Safety
Directorate General of Mines Safety,
P.O & Distt: Dhanbad - 826 016.

To

NANDINI CHAKRAVARTY, Mine Line Pvt. Ltd., 23, INDRANI PARK
West Bengal, Kolkata, KOLKATA, 700033

Subject:  Approval under Regulation 208 (3) of the Coal Mines Regulations, 2017 for flameproof Transwitch Unit (combined) rated at 1000 KVA, primary voltage upto 3300 V and secondary voltage upto 1100 V in Mild Steel fabricated steel plate construction Type - 2140, manufactured by M/s. Mine Line Pvt. Ltd., Kolkata, conforming to IS/IEC 60079-0:2017 and IS/IEC 60079-1:2014 for use in belowground Coal Mines– Renewal thereof.

Reference: Test report issued by CIMF vide no.IN/CIMFR/TR20/H97 dated 31.08.2020, letter no.CIMFR/FES/Cons./22-23/242 dated 21.06.2022 and the associated drawing no. 950571, dated 15.05.2020.

Madam,

Please refer to your online application No. E-29021|61936|2022|Electrical(HQ) dated 04.06.2024 on the above subject & test reports and other documents submitted therewith in this regard.

I, in exercise of powers conferred upon Chief Inspector of Mines (also designated as Director General of Mines Safety) under Regulation 208 (3) of the Coal Mines Regulations, 2017, hereby renew the Approval No. 560 of 2007 granted vide this Directorate's letter No. 333/1870/EHQ dated 06.08.2007 for a further period of two years, i.e. up to 06.08.2026 for use in belowground Coal Mines.In the interest of safety, the OEM guidelines shall be adhered to and spares, supplied by OEM shall only be used while maintaining the machine/Equipment. The conditions mentioned in the original approval and subsequent renewal letters, if any, shall be strictly complied with and the test reports of all the electrical items covered under approval, conforming to the latest standards, shall be submitted within three months, if not submitted before.

The application for renewal should be made at least three (03) months before the date of expiry of the approval.