BUREAU OF INDIAN STANDARDS Manak Bhavan, 9 Bahadur Shah Zafar Marg New Delhi 110002 Phones 2323 0131 2323 3375 Extn 8284 TeleFax +91 11 2323 1192 Website : www.bis.org.in email : eetd@bis.org.in व य पक पर च लन स द प रल ख प र षण स ज ञ पन स दर भ ददन क ईट ड 15/ ट - 39 05-02-2019 तकन क सम तत ईट प र षत : 1. ईट ड 15 क सभ सदस य 2. व द य त तकन क व भ ग पर षद क सभ सदस य तथ 3. र च खन ल अन य सभ ननक य मह दय, क प य म म म त स श ध मस द क एक प रमत स ग ह : प र श र षक ईट ड 15(13665) ल इन ऑपर ट ड त न फ ज ए.स. म टर ( आईई क ड ) दक षत वर ग करण एव क र यक ररत ववश ष ट ( त सर प नर क षण ) स श धन स ख य 1 क प य इस स श ध मस द क अव क कर और अप स ममतय यह तत त हएए मक अ तत यमद : य स श ध क र प म प रक मशत ह ऍ त इस पर अम कर म आपक व यवस य अवव क र त र म य कम इय आ सकत ह स ममतय यमद क ई ह त क प य अ प पर मदए प र म अध ह त क षर र क रपलरम म त पत पर द सम मत य जन ज त तत यम यर ख 18-02-2019 धन यव द, वद य, (र व शम ष) प रम (मवद य त तक क मव ) स : रपलरम म त
BUREAU OF INDIAN STANDARDS Manak Bhavan, 9 Bahadur Shah Zafar Marg New Delhi 110002 Phones 2323 0131 2323 3375 Extn 8284 TeleFax +91 11 2323 1192 Website : www.bis.org.in email : eetd@bis.org.in DRAFT AMENDMENT IN WIDE CIRCULATION DOCUMENT DESPATCH ADVICE Our Ref Date ETD 15/T- 05-02-2019 TECHNICAL COMMITTEE: ETD 14 ADDRESSED TO: 1. All Members of Sectional Committee, ETD 15; 2. All Members of Electro technical Division Council; and 3. All Interested. Dear Sir(s), Please find enclosed copy of the following draft amendment: Doc No. ETD 15 (13665) Title Draft Amendment No. 1 February 2019 to Line Operated Three Phase a.c. Motors (IE CODE ) Efficiency Classes and Performance Specification (Third Revision ) Kindly examine the draft amendment and forward your views stating any difficulties which you are likely to experience in your business or profession, if these are finally adopted as AMENDMENT. Comments, if any, may please be made in the format given overleaf and mailed to the undersigned. Last date for comments: 18 February 2019. Thanking you, Yours faithfully (Rajeev Sharma) Head (Electrotechnical Department) Email: eetd@bis.org.in Encl : See attachment.
Date Document No. 05-02-2019 Doc: ETD 15 (13665) Sl. No. Name of the Organization Clause/ Sub-Clause Paragraph/ Figure/Table Type of Comment (General/Editorial /Technical) Comments Proposed Change
ETD 15 Doc. (13665) DRAFT AMENDMENT NO. 1 FEBRUARY 2019 TO IS 12615: 2018 LINE OPERATED THREE PHASE A.C. MOTORS (IE CODE) EFFICIENCY CLASSES AND PERFORMANCE SPECIFICATION (THIRD REVISION) [Page 1, Clause 1.1 (m), line 9] Substitute see 11 for see 12. (Page 1, Clause 1.1, Note 5) Insert the following para at the end: Motors which are used with service factor > 1.0 for a continuous duration greater than 1h must meet the efficiency corresponding to the actual power (service factor x rated kw marked on the nameplate). (Page 3, Clause 6, para 2, line 5) Insert the word measured after the word and. (Page 4, Clause 12.3) Insert the following para at the end: If a motor carries a sustained overload due to operation at service factor > 1.0 then note 5 under 1.1 shall apply. (Page 4, Clause 15.1.1, Note) Substitute the following for the existing note: Motors operated by frequency converters may have higher losses as compared to line (sinusoidal) power supply due to the harmonic voltage content. These motors must be tested on sinusoidal supply and efficiency must meet the declared efficiency class (which should not be lower than IE2 class). (Page 5, Clause 15.4.2, Note) Insert the words for IE2 motors only at the end. (Page 9, Table 2, Note 2) Substitute the following for the existing note and renumber the subsequent notes: 2 If the pull-up torque occurs at 0 speed, then minimum value of the starting torque permitted (subject to no tolerance) shall be 0.5 times the rated torque 3 Sometimes motors are required to be offered in frame sizes higher than as stipulated in Table 3 of IS 1231. Such cases are covered for IE classification and marking. The motor shall meet the performance parameters of the rated power (Table 1 to Table 4).
(Page 11 & 12, Table 4, Column 4) Delete the word Max. (Page 11 & 12, Table 4, Column 5) Insert the word Max. (Page 6 to 12, Table 1 to 4, Note 5) Insert the following new note 6 at the end: 6 Locked rotor torque values declared above are indicative and actual values may be obtained from manufacture s catalogue. For special applications, the higher values of locked rotor torque may be declared.