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NO: E-29021|51097|2022|Electrical(HQ) Dhanbad, Date: 04.05.2022
Permissible Variation for DGMS Approval No.80 Group-I of 1974
From
Cheif Inspector of Mines &
Director General of Mines Safety
Directorate General of Mines Safety,
P.O & Distt: Dhanbad - 826 016.
To
Mr. RAMESH KUMAR N, M/s.CG Power and Industrial Solutions Limited, A-6/2 MIDC INDUSTRIAL AREA , AHMEDNAGAR 414111
Maharashtra,
Sub: Approval under Regulation 208 (3) of the Coal Mines Regulations, 2017 for flameproof squirrel cage induction motor rated at 60 HP, 550 V, 3 phase, 50 Hz, 3000 RPM in frame size-E225M with detachable terminal box with sealing box and gland for wire armoured cable with external fan and fan cool, manufactured by M/s. CG Power and Industrical Solutions Limited, Ahmadnagar conforming to IS/IEC 60079-1:2014 and IS/IEC 60079-0:2011 for use in belowground Coal Mines– Permissible variation thereof.
Dear Sir,
Please refer to your online application No.51097 dated 16.01.2022 and online letter No. LTM/DGMS/REN/2021-22/10V dated 16.01.2020 on the above subject.
The matter has since been examined and based on the ERTL(E) test report No. ERTL(E)/TES/C299/0012/12-19 dated 01.05.2020 as per IS/IEC60079-1-2014 and IS/IEC60079-0:2011 standards, following permissible variation is allowed which does not adversly affect the flameproof features of the subject equipment subject to fulfillment of the conditions stipulated in DGMS approval No. 80 of 1974:
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Pole
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Voltage
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KW
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2
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Upto 690V
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Up to 45
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4
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Upto 690V
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Up to 45
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6
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Upto 690V
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Up to 30
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8
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Upto 690V
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Up to 22
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This letter shall always be accompanied with the approval letter, issued earlier for inclusion of permissible variations as mentioned in this letter.
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