Subject: Approval under Regulation 208(3) of the Coal Mines Regulations, 2017 for flameproof Belt Speed Switch, Type: BSS65, rated 2A at 220V, manufactured by M/s. Mine Line Pvt. Ltd. conforming to the testing standards IS/IEC 60079-0:2017 and IS/IEC 60079-1:2014. For use in belowground coal mine India - Renewal thereof.

Ref:-1. The test report no. IN/CIMFR/TR22/S/ H 57 dated 13/05/2022 and Type  Examination certificate no. CMF 20 INEx 0289 dated 13/05/2022

       2. The performance report letter no. MMR/ENM/2026/51/58 dated 05/03/2026 of Kalyani Khani no.05 Incline of M/s SECL.

Please refer to your online application no. E-29021|62713/2026/Electrical (HQ) dated 28/01/2026 on the above subject & test reports and other documents submitted 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 DGMS Approval No. 820 of 2023 granted vide this Directorate's letter No. E-29021/61636/2023/EHQ dated 20/10/2023, subject to compliance with the conditions stipulated in the original approval, for a further period of Five i.e. up to 05/04/2031 for use in belowground Coal Mines in India.

The application for renewal should be made, with updated BIS and test reports with latest applicable testing standards, at least three (03) months before the date of expiry of the approval.