Bureau of Energy Efficiency
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SCHEDULE – 22 1
st
March ,2019
MICROWAVE OVENS
1. SCOPE
1.1. This schedule specifies the requirement for participating in the energy-labeling program for all
types of microwave ovens (including combination microwave ovens) meant for household or
similar use, with or without grill or convection functions, being manufactured, imported or sold
in India.
This schedule applies to all types of counter-top microwave oven (covered under the scope of IS
302-2-25, and IEC 60705).
From technology perspective, any additional feature built into the oven are also covered within
the scope of the standard provided it does not influence the various requirements specified in this
schedule.
1.2. This schedule specifies the requirements for following performance parameters for microwave
ovens:
a. Microwave function efficiency
b. Energy consumption
c. Power consumption in Standby mode
NOTE: For the purpose of this schedule, the star rating shall be based on per-cooking-cycle energy
consumption (Wh/cooking cycle), with energy consumption measured as per methodology
specified in the latest version of IEC 60705.
2. NORMATIVE REFERENCES
This schedule shall be read in conjunction with the following standards with all amendments, for the
purpose of star labeling:
Reference Standard Title of the Standard
IEC 60705: Amendment 1,
2010 and Amendment 2,
2018
Household microwave ovens – Methods for measuring performance
IEC 62301 Household electrical appliances – measurement of standby power
IS 302-2-25 Safety of household and similar electrical appliances
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3. TERMINOLOGY
For the purpose of this schedule the following definitions in addition to those given in IEC 60705, and
IS 302-2-25 shall apply.
3.1 Family of models: Family of models is the range of models of a particular brand, to which a single
set of test reports is applicable and where each of the models has the same physical characteristics,
energy performance, microwave function efficiency, standby power and other performance
characteristics.
3.2 Label means any written, printed, marked, stamped or graphic matter affixed to, or appearing on
the microwave oven.
3.3 Validity of Label: means the validity period of energy consumption norm under energy labeling
plan specified in this schedule.
4. TESTING GUIDELINES
4.1 Methods of Tests: The tests specified in this schedule shall be carried out as per IEC 60705 with
all Amendments and IEC 62301. The testing guideline for each of the performance parameters is
mentioned below.
4.2 Testing parameters
4.2.1 Microwave power output: The test for measuring microwave power output shall be conducted
as per IEC 60705 Amendment 1 and Amendment 2.
The value of microwave power output shall be reported in Watts.
4.2.2 Microwave function efficiency: The test for measuring microwave function efficiency of the
microwave oven shall be conducted as per IEC 60705 Amendment 1 and Amendment 2.
The value of microwave function efficiency shall be indicated as a percentage.
4.2.3 Energy consumption (per cooking cycle): The per-cooking-cycle energy consumption of the
microwave oven shall be calculated as per IEC 60705 Amendment 1 and Amendment 2.
The energy consumption shall be reported in Wh/cooking cycle.
4.2.4 Power consumption in Standby mode: The standby power of the microwave oven shall be
calculated as per IEC 62301 with all amendments.
4.2.5 Testing conditions: As per the methods prescribed in IEC 60705, and IEC 62301 respectively.
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5. TEST REPORT
The results of test shall be reported in the prescribed format as given in Annexure I of this Schedule.
Test report of 3 samples for each model of Microwave Oven is required for registration.
All 3 tests i.e. Standby power, Microwave Function Efficiency and Energy consumption is required
for each of the 3 samples.
6. TOLERANCE LIMIT
The tolerance on the measured value for microwave function efficiency, power consumption on
standby mode and microwave power output shall be as given in section 7.2 of this schedule.
7. MINIMUM QUALIFICATION REQUIREMENTS
7.1 The product shall be BIS certified for safety as per IS 302-2-25
7.2 The following benchmarks should be ensured by the manufacturer with relevant test reports (testing
conditions as per respective IEC standards with latest amendments). These would be additional
parameters verified other than energy consumption in the BEE check/challenge testing of the sample
drawn.
Microwave oven
Parameter Minimum requirement
Microwave function efficiency ≥ 54%
Power consumption in standby mode ≤ 0.6 W
8. RATING PLAN
Table Validity Period
1st March 2019 to 31st December 2020
Star rating Energy consumption per cooking cycle (E)
Wh
1-star 56 < E ≤ 60
2-star 52 < E ≤ 56
3-star 48 < E ≤ 52
4-star 44 < E ≤ 48
5-star E ≤ 44
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There is no negative tolerance for the Star Rating Bands. All tested products must meet the minimum
threshold for each Star rating Band. The scope for manufacturing tolerance and other variations shall
be accounted by the manufacturer or permittee while determining the Star Rating of a particular model.
9. FEES
1. Application fee payable on application for assignment of the authority to affix label is INR
2000/- (Rupees Two thousand only)
2. Application fee payable on application for renewal of authority to affix labels is INR 1000/-
(Rupees One Thousand only).
3. Labeling fee for affixation of label on each unit of microwave oven is INR 20/- (Rupees
twenty only)-
10 LABEL DESIGN AND MANNER OF DISPLAY
10.1 Placement: The microwave ovens must display the label at the point of sale. The label shall be
affixed on the front/side/top of the product. The label shall also be displayed on the packaging.
Label contents:
Electricity consumption per cooking cycle (Wh)
Label period
Appliance type (solo /convection /grill)
Brand
Model no. /year of manufacturing
Capacity
Rated Power Output
Material, Dimension and Shape
The label shall be of durable cardboard, or be self- adhesive and shall be cut to one of the outlines
shown in figure 1.
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10.3 Sample Label
An example of a printed star label to be affixed on the model is shown in figure below.
Figure 1: Sample Label
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10.5 Color scheme
The label shall be printed as per the color scheme given in figure below.
Figure 2: Color Scheme for the Label
Note: CDR File is available on BEE Website (www.beestarlabel.com)
11.Check Testing
As described in the operations manual of BEE’s S&L program.
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ANNEXURE I
TEST REPORT FORMAT FOR MANUFACTURERS LAB and INDEPENDENT LAB
1. General Information /sample details
Name of Manufacturer
Test Lab Name, address and contact details
Rated power output
Rated voltage/voltage range
Rated microwave frequency
Rated capacity/Volume
Serial number of the sample
Model number
Family of models details
Condition of unit under testing on receipt
Date of receipt of samples
Applicable standard IEC 60705:2010 + AMD1:2014, Edition 4.1:
2014-06 & AMD2:2018
IEC 62301, Edition 2.0: 2011-01
Date of
Testing
(Start date) End Date
General ambient
condition
Temperature in °C 23 ± 2°C
Relative humidity in
%
45-70 %
Date of Reporting
2. Details of the Sample tested
S.
No.
Test Parameter Standard & Clause
Number
Result (observed
values)
1. Microwave Power
Output
Clause 8 of IEC 60705
2. Microwave
Function Efficiency
Clause No. 9 of IEC
60705:2010 +
AMD1:2014, Edition
4.1: 2014-06 and AMD:2
in 2018
3. Energy
consumption for the
microwave function
Clause No. 14 of IEC
60705:2010
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+ AMD1:2014, Edition
4.1: 2014-06 and AMD2:
2018
4. Standby Power
Consumption
Clause 15 of IEC
60705:2010 +
AMD1:2014, Edition
4.1: 2014-06 and Clause
No. 5 of IEC 62301,
Edition 2.0: 2011-01
3. Details of each test conducted
Test No.1- Microwave power input as per clause 8 of IEC 60705
Test methodology adopted: The microwave power output is calculated from the formula:
��= [4.187 �� ����(��1 −��0)+ 0.55 �� ����(��1 −����)]/��
Following data to be recorded:
Sr. No Symbols Parameters Observed values
1 P is the microwave power output (W);
2 mw is the mass of the water (g);
3 mc is the mass of the container (g);
4 TA is the ambient temperature (°C);
5 T0 is the initial temperature of the water (°C);
6 T1 is the final temperature of the water (°C);
7 t is the heating time (s), excluding the magnetron
filament heating-up time.
Test No.2- Efficiency as per Clause 9 of IEC 60705
Test methodology adopted: The energy consumed during the test as per clause 8 is used to determine
the Efficiency. The efficiency of the oven is calculated from the formula:
The efficiency is expressed in percentage.
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Following data to be recorded:
S. No. Symbol Parameters Observed values
1. η Efficiency (%)
2. P Microwave Power(W) output
3. t heating time(s), excluding the magnetron
filament heating up time
4. W in Input Energy(Wh) including the magnetron
filament heating-up energy consumption
Test No.3- Energy Consumption for the Microwave Function as per Clause 14 of IEC 60705
Test methodology adopted: The test Load was used as per the Table 4 of clause 14.2 of IEC
60705:2010 + AMD1:2014, Edition 4.1: 2014-06. The measurement of energy consumption has been
performed as per clause 14.5 of IEC 60705:2010 + AMD1:2014, Edition 4.1: 2014-06
The final energy consumption Wfinal was calculated from the formula:
Following data to be recorded:
A. Measurement of energy consumption for a cooking cycle
S. No. Parameter Observed value
1. Heating time tlow and thigh (s); including the magnetron
filament heating-up time
2. Initial temperature T0 (°C)
3. Final temperature Tlow and Thigh (°C)
4. Energy consumption Wlow and Whigh (Wh)
5. Test voltage (V)
6. Energy Consumption for small load (W50,s) (Wh)
7. Energy Consumption for medium load (W50,m) (Wh)
8. Energy Consumption for large load (W50,l) (Wh)
9. heating time tlow and thigh (s); including the magnetron
filament heating-up time
10. Initial temperature T0 (°C)
11. Final temperature Tlow and Thigh (°C)
12. Energy consumption Wlow and Whigh (Wh)
13. Ambient temperature (°C) at the start of the test (when the
water is positioned in the appliance)
14. Actual and nominal mass of water (g)
15. Actual mass of the water (g); (mw)
16. Nominal mass of water (275 g, 350 g, 1 000 g); (mw,n)
17. Actual mass of the container (g); (mc)
18. Initial temperature of the water (°C);( T0)
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19. Final temperature of the water for the low temperature range
(°C); (Tlow)
20. Final temperature of the water for the high temperature range
(°C);( Thigh)
B. Calculation for the energy consumption of a cooking cycle
S. No. Parameter Observed value
1. Microwave power output measured according to Clause 8
2. Type of the appliance, available heating function(s)
3. Type of the appliance, available heating function(s)
4. Fitted with turntable or reciprocating tray
5. Position of the loads
6. Supply voltage at which the measurements were made
7. energy consumption in Wh rounded to one decimal according
to 14.6 for each load
8. final result per cooking cycle, Wfinal, in Wh rounded to one
decimal according to 14.7
Test No.4- Standby Power Consumption as per Clause 15 of IEC 60705 + Clause 5.3 of IEC 62301
Test methodology adopted: The Product Standby power was measured as per Clause 15 of IEC
60705:2010 + AMD1:2014, Edition 4.1: 2014-06 and the clause 5.3 of IEC 62301, Edition 2.0:
2011-01. The product was configured for standby mode.
Test observations:
S. No. Parameter Observed values
1. Product Mode
2. Average Power (W)
3. Uncertainty of the result due to the measuring instrument (%)
4. Measurement method use
5. Sampling interval
6. Total duration of measurement (min)
7. Stability Period (min)
8. Energy (Wh)
9. Ambient conditions (temp.) (°C)
10. Total harmonic distortion
11. Accumulated energy and period of measurement (s/m/hr)
12. Description of how the appliance mode selected and
programmed.
13. Sequence of events to reach the mode where equipment
automatically changes mode, if any
