Coal mining equipment approval

of India Ministry of Labour & Employment Directorate General of Mines Safety /EHQ, Dhanbad, dated Speed Post -2016 No.

From:

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

To Shri Haranath Babu Boyapati — Director M/s. Electroteknica Switchgears Private Ltd.

1/5A, Raja Basanta Roy Road Kolkata-700 026.

Sub:

Ref:

Renewal of DGMS approval No. 446 of 1996 under Regulation 181 (3) of the Coal Mines Regulations, 1957 for Flameproof Transwitch Unit, Model No. F-Transwitch/01 rated 315 KVA, 3300/600-400 V with FLP primary vacuum breaker, type-VIB-150 and FLP secondary chamber suitable for earth neutral or restricted neutral system conforming to IS/IEC 60079-0:2004 and IS/IEC 60079-1:2007 manufactured by M/s.

Electroteknica Switchgears Private Ltd., Kolkata for use in belowground Coal Mines.

ERTL test report No. dated 08.05.2012.

IDENTIFICATION MARK DGMS APPROVAL NO. 446 of 1996 Dear Sir, Please refer to your letter Nos. ESPL/DGMS dated 30.03.2013 and subsequent correspondence thereupon the above subject.

•Based on DGMS approval No. 446 of 1996 issued by this Directorate's letter No.

446/607/EHQ dated 28.06.1996, BIS Licence No. CM/L-5053551 and above ERTL test report under reference, I hereby renew the approval to 18.06.202 fr m the ate of x i i.e. from 18.06.2019 for use in belowground Coal Mines, subject to compliance with conditions stipulated in the original approval as well as annexure enclosed with this renewal letter.

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

Encl .

• Annexure Yours faithfully, (Rahul Guha)

Director General of Mines Safety Annexure DGMS approval No. 446 of 1996 renewed by this Directorate's letter No.

........................./EHQ dated.....

Condition for renewal of DGMS approval No. 446 of 1996 under Regulation 181 (3) of the Coal Mines Regulations, 1957 for Flameproof Transwitch Unit, Model No. F-Transwitch/01 rated 315 KVA, 3300/600-400 V with FLP primary vacuum breaker, Wpe-VIB-150 and FLP secondary chamber suitable for earth neutral or restricted neutral system conforming to IS/IEC 60079-0:2004 and IS/IEC 60079-1:2007 manufactured by M/s. Electroteknica Switchgears Private Ltd., Kolkata for use in belowground Coal Mines.

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(i) Every' unit shall carry conspicuously in a permanent manner the aforesaid identification mark i.e. IDGMS APPROVAL NO. 446 of 1996 renewed vide DGMS letter No.

..../EHQ dated......

In addition, every unit shall also carry permanently this Directorate's approval mark as given below :

Gove nr;MS

(ii) In the nameplate marking shall be in accordance with the applicable requirements of the relevant standards.

(a)The design of the electrical circuit shall not be changed without obtaining prior approval from this Directorate.

(b)Conspicuous warning inscriptions against opening the cover of the main enclosure or of any apparatus which gives access to the flameproof enclosures on live parts or which is designed to receive cable attachment unless the supply to the unit is isolated at source, shall be affixed permanently on the respective part to ensure that all live parts within the unit are made dead and safe.

Spare parts shall be made readily available to the user as and when required for proper maintenance of the equipment.

(a) The customer shall be supplied the copy of this approval letter, the test report from the testing laboratory with the lab certified drawing , an extract of the condition & special conditions, maintenance schedule, if any, recommended by the testing laboratory in their test report(s) so as to maintain safety features of apparatus/equipment.

(b) The customer shall also be provided a copy of factory test report along with drawings, instruction manual on the installation, operation and maintenance of the equipment and spares parts catalogue at the time of delivery of the equipment.

The user shall furnish the performance report of the equipment directly to this Directorate after one (01) year of actual use.

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-2- Any modification to the equipment that might be considered necessary at a later date shall be effected upon being so directed by this Directorate.

While seeking renewal of approval, valid BIS license in the case of Indian manufacturers and in case of foreign manufacturers QAR/QAN, as may be applicable, shall be submitted.

An officer of this Directorate may at any time draw a sample either from the factory or from the user and get it tested at the cost of the manufacturer. If the test reports are not satisfactory, this approval shall be deemed to be suspended.

If there occurs any revision of standards applicable to the product/equipment , the manufacturer shall get the product/equipment tested as per revised standards and submit test reports to the customer for information and to this Directorate for further approval/renewal.

The cable entry devices, threaded adaptors and stopping plugs shall be suitable for the equipment and be considered as a part of equipment (not a component). The cable entry device and cabling methods used shall be suitable for their intended duty and for the special type of cable used in mining. Such cable entry devices shall be duly certified as per relevant IS/IEC standards.

In case of any permissible variations issued from this Directorate, they shall also be read along with this letter and the original approval letter.

The approval is renewed upto 18.06.2021 from the date of expiry i.e. from 18.06.2016.

The equipment manufactured subsequently shall be identical to the proto type tested at ERTL vide test report No. dated 08.05.2012.

At the time of applying for renewal, details of supply with name of mines, purchase order and date shall be furnished with the application.

If at any time any of the conditions subject to which this approval has been granted, is violated or not complied with, this approval shall be deemed to have been revoked

• with immediate effect.

The above approval may be amended or withdrawn at any time, if considered so necessary in the interest of safety and is being issued without prejudice to any other provisions of law which may be or may become applicable at any time.

ahul Director General of Mines Safety