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NO: E-29021|30862|2021|Electrical(HQ) Dhanbad, Date: 07/07/2021
DGMS APPROVAL NO.-190 of 1979
From
Chief Inspector of Mines &
Director General of Mines Safety
Directorate General of Mines Safety,
Dhanbad - 826 016.
To
NANDINI CHAKRAVARTY, Mine Line Pvt. Ltd., 23, INDRANI PARK
West Bengal, KOLKATA, KOLKATA, 700033
Subject: Approval No. 190 of 1979 under Regulation 181 (3) of the Coal Mines Regulations, 1957 for flameproof air break circuit breaker, type-CB-1 redesignated as CB 6 rated at 100 A, 550 V, 3 phase, 50 Hz, 7.5 MVA breaking capacity manufactured by M/S Mine Line Pvt. Ltd., Kolkata conforming to IS/IEC 60079-0:2004 and IS/IEC 60079-1:2007 for use in belowground Coal Mines– Renewal thereof.
Dear Madam,
Please refer to your online application No.E-29021/30862/2021/Electrical (HQ) dated 31.05.2021, offline application No. M21/DGMS/31 dated 24.06.2021 on the above subject and ERTL Test & Assessment Report No.ERTL(E)TES/M056/0042/01-12 dated 18.01.2012, BIS Licence No. CM/L-0893166 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 (DGMS Approval No. 190 of 1979) granted vide this Directorate's letter No. 333/C/79/1649/EHQ dated 22.11.1979 for a further period of five years, i.e. up to 19.06.2026 for use in belowground Coal Mines. The conditions mentioned in the original approval and subsequent renewal letters shall be strictly complied with.
Please note that application for renewal should be made at least three (03) months before the date of expiry of the approval.
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