NO: E-29021|30387|2020|Electrical(HQ) Dhanbad, Date: 29/10/2020
Chief Inspector of Mines &
Director General of Mines Safety
Directorate General of Mines Safety,
Dhanbad - 826 016.
Shri Debajit Sen – Director (Finance)
M/s. Marathon Electric Motors (India) Ltd.,
1, Taratala Road, Kolkata – 700024.
Sub: Approval under Regulation 208 (3) of the Coal Mines Regulations, 2017 for flameproof foot mounted fan cooled squirrel cage induction motor in frame size-KF 250 M rated at 55 KW, 4 pole, 500/550 V, 3 phase, 50 Hz, 1500 RPM manufactured by M/s. Marathon Electric Motors (India) Limited, Kolkata conforming to IS/IEC 60079-1:2007 and IS/IEC 60079-0:2004 for use in belowground Coal Mines– Renewal thereof.
Please refer to your online application No. E-29021/30387/2020/Electrical (HQ) dated 03.01.2020, offline application MS/MOTOR/KF250M/134 dated 14.11.2019 on the above subject and CIMFR test report no. CIMFR/TC/SR/H106 dated 16.05.2013, BIS License No. CM/L- 0374445 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. 134 Group-I of 1977) granted vide this Directorate's letter No. 60/76/471/EHQ dated 20.04.1977 for a further period of five years, i.e. up to 17.10.2024 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.