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    ECBC - Losses

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    Bu Man
    This document summarizes the mandatory requirements for electrical and renewable energy systems in buildings complying with the Energy Conservation Building Code 2017. Key points include: 1) Power transformers must meet maximum allowable loss requirements and minimum BEE star ratings. Dry type transformers cannot exceed the loss values in Table 7-1 and oil type transformers must be BEE 4-star or above. 2) Transformer losses must be measured using calibrated meters and transformers over 500kVA must have additional metering for periodic loss monitoring. 3) Voltage drop for feeders cannot exceed 2% and 3% for branch circuits. 4) Three phase induction motors must meet minimum IE efficiency class requirements, with higher classes required for

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    ECBC - Losses

    Uploaded by

    Bu Man
    173 views4 pages
    This document summarizes the mandatory requirements for electrical and renewable energy systems in buildings complying with the Energy Conservation Building Code 2017. Key points include: 1) Power transformers must meet maximum allowable loss requirements and minimum BEE star ratings. Dry type transformers cannot exceed the loss values in Table 7-1 and oil type transformers must be BEE 4-star or above. 2) Transformer losses must be measured using calibrated meters and transformers over 500kVA must have additional metering for periodic loss monitoring. 3) Voltage drop for feeders cannot exceed 2% and 3% for branch circuits. 4) Three phase induction motors must meet minimum IE efficiency class requirements, with higher classes required for

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    This document summarizes the mandatory requirements for electrical and renewable energy systems in buildings complying with the Energy Conservation Building Code 2017. Key points include: 1) Power transformers must meet maximum allowable loss requirements and minimum BEE star ratings. Dry type transformers cannot exceed the loss values in Table 7-1 and oil type transformers must be BEE 4-star or above. 2) Transformer losses must be measured using calibrated meters and transformers over 500kVA must have additional metering for periodic loss monitoring. 3) Voltage drop for feeders cannot exceed 2% and 3% for branch circuits. 4) Three phase induction motors must meet minimum IE efficiency class requirements, with higher classes required for

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    173 views4 pages

    ECBC - Losses

    Uploaded by

    Bu Man
    This document summarizes the mandatory requirements for electrical and renewable energy systems in buildings complying with the Energy Conservation Building Code 2017. Key points include: 1) Power transformers must meet maximum allowable loss requirements and minimum BEE star ratings. Dry type transformers cannot exceed the loss values in Table 7-1 and oil type transformers must be BEE 4-star or above. 2) Transformer losses must be measured using calibrated meters and transformers over 500kVA must have additional metering for periodic loss monitoring. 3) Voltage drop for feeders cannot exceed 2% and 3% for branch circuits. 4) Three phase induction motors must meet minimum IE efficiency class requirements, with higher classes required for

    Copyright:

    © All Rights Reserved
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    Download as pdf or txt
    of 4

    ENERGY

    CONSERVATION
    BUILDING
    CODE
    2017
    (With Amendments upto 2020)
    7. Electrical and Renewable Energy Systems
    ELECTRICAL & RENEWABLE

    7.1 G e n e r a l
    All electric and renewable energy equipment and systems shall comply with the mandatory
    requirements of §7.2.

    7.2 Mandatory Requirements


    7.2.1 Transformers
    7.2.1.1 Maximum Allowable Power Transformer Losses
    Power transformers of the proper ratings and design must be selected to satisfy the minimum
    acceptable efficiency at 50% and full load rating. The permissible loss shall not exceed to
    values listed in Table 7-1. for dry type transformers. BEE star rating for dry type transformer
    shall take precedence over this table once notified by BEE under BEE Standards and Labelling
    Program.

    For oil type transformer BEE star rated transformer (BEE Standards and Labelling Program)
    shall be used in all compliant buildings. Power transformers to meet compliance shall have:

    (a) minimum 3 stars rating in ECBC Buildings


    (b) minimum 4 stars rating in ECBC+ Buildings
    (c) 5 stars rating in Super ECBC Buildings

    Table 7-1 Permissible Losses for Dry Type Transformers

    Rating Max. Losses at Max. Losses at Max. Losses at Max. Losses at


    kVA 50% loading 100% loading 50% loading 100% loading
    W* W* W* W*
    Up to 22 kV class 33 kV class
    100 940 2,400 1,120 2,400
    160 1,290 3,300 1,420 3,300
    200 1,500 3,800 1,750 4,000
    250 1,700 4,320 1,970 4,600
    315 2,000 5,040 2,400 5,400
    400 2,380 6,040 2,900 6,800
    500 2,800 7,250 3,300 7,800
    630 3,340 8,820 3,950 9,200
    800 3,880 10,240 4,650 11,400
    1,000 4,500 12,000 5,300 12,800
    1,250 5,190 13,870 6,250 14,500
    1,600 6,320 16,800 7,500 18,000
    2,000 7,500 20,000 8,880 21,400

    80 Energy Conservation Building Code 2017


    Rating Max. Losses at Max. Losses at Max. Losses at Max. Losses at
    kVA 50% loading 100% loading 50% loading 100% loading
    W* W* W* W*

    ELECTRICAL & RENEWABLE


    2,500 9,250 24,750 10,750 26,500
    1,250 5,190 13,870 6,250 14,500
    1,600 6,320 16,800 7,500 18,000
    2,000 7,500 20,000 8,880 21,400
    2,500 9,250 24,750 10,750 26,500
    *The total loss values given in above table are applicable for thermal classes E, B and F and have
    component of load loss at reference temperature according to Clause 12.7 of IS 11171 i.e. average
    winding temperature rise as given in Column 4 of Table 4 of IS 11171 plus 300C. i.e. for F thermal class
    the total loss values shall be calculated at 1200C and for H thermal class the total loss values shall be
    calculated at 1450C. An increase of 7% on total loss value for thermal class H is allowed.”
    * The values as per Indian Standard/BEE Standard & Labelling notification for dry type transformer
    corresponding to values in this table will supersede as and when the Indian standards/ BEE Standard
    & Labelling notification are published.

    7.2.1.2 Measurement and Reporting of Transformer Losses


    All measurement of losses shall be carried out by using calibrated digital meters of class 0.5
    or better accuracy and certified by the manufacturer. All transformers of capacity of 500
    kVA and above would be equipped with additional metering class current transformers (CTs)
    and potential transformers (PTs) additional to requirements of Utilities so that periodic loss
    monitoring study may be carried out.

    7.2.1.3 Voltage Drop


    Voltage drop for feeders shall not exceed 2% at design load. Voltage drop for branch circuit
    shall not exceed 3%at design load.

    7.2.2 Energy Efficient Motors


    Motors shall comply with the following:

    (a) Three phase induction motors shall conform to Indian Standard (IS) 12615 and shall
    fulfil the following efficiency requirements:

    i. ECBC Buildings shall have motors of IE 2 (high efficiency) class or a higher


    class
    ii. ECBC+ Buildings shall have IE 3 (premium efficiency) class motors or
    higher class
    iii. Super ECBC Buildings shall have IE 4 (super premium efficiency) class
    motors

    (b) Motors of horsepower differing from those listed in the table shall have efficiency
    greater than that of the next listed kW motor.

    Energy Conservation Building Code 2017 81

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