1 
 Requirements on Minimum Energy Performance Standard , Labelling 
and Inspection of Rotodynamic  Water Pump s  
Announcements ： 
1. The rotodynamic water pump  referred to in this Announcement are 
those driven by a three -phase motor (“ Water Pumps ” or “products” 
hereafter), including the end suction single stage own bearing 
rotodynamic  water pumps , end suction single stage close coupled 
rotodynamic  water pumps and end suction single stage close coupled 
inline rotodynamic  water p umps , which  shall be in compliance with 
the applicable scope indicated in the Appendix 1.  
2. The Water Pumps  shall be tested for the energy efficiency measured 
value pursuant to the requiremen ts of grade 2 or higher under 
currently effective National Standards of the Republic of China 
(“CNS ”) 16017,  or the equivalent  requirements of grade 2 or higher 
under  International Organization for Standardization (“ISO”) 9906.  
The measured energy efficiency values of the Water Pumps  without 
motors  (“Bare Pumps”  hereafter ) shall not be lower than the 
minimum energy performance standard requirements for  the Bare 
Pumps  (see Appendix 2) and shall be  higher than or equal to  the 
product rated  value.   
The measured energy efficiency index values of the Water Pumps with 
motors (“Pump Units ”  hereafter ) shall not be higher than the 
minimum energy performance standard requirements  for the Pump  
Units and the product rated  value  (see Appendix 2) . The three -phase 
motor driving the Water Pumps  which is designated by the Central 
Competent Authority's announcement shall comply with the minimum 
energy performance standards  for the motor.  
3. While manufacturing or importing the Water Pumps  for domestic use , 
the product manufacturer or importer (hereafter referred to as “the 
dealer ”) shall submit the following documentation to the Central  
Competent  Authority to apply for the registration account and 2 
 password for Minimum Energy Performance St andard M anagement 
System  (hereafter referred to as “Management System”) , in order to  
access the Management S ystem:  
  (1) Original copy of the Application  Form  for Management System 
Registration Account and Password (Appendix 3).  
 (2) Copy of the product dealer’s corporate registration certificate or 
commercial registration certificate, or other equivalent certificates .  
4. After obtaining the  Management System account and password, the 
product dealer shall apply for registration  of the energy efficiency via 
the Management System, and submit the following documentation to 
the Central Competent Authority:  
 (1) Original Copy of the Application  Form  for Registration of Water 
Pumps  Energy Efficiency (see Appendix 4). 
(2) Registration of single model: The rated power of Water Pumps  shall 
be divided into  four ranges (1) 0.75 kW ~ less than 7.5kW;(2) 7.5kW 
~ less than 37kW; (3) 37kW ~ less than 75kW and (4) above 75kW . 
For application for  registration of more than three models  for each 
category of Water Pumps in each range , the product  dealer shall 
provide a copy of the t est report on energy efficiency of two models 
designated by the Central  Competent  Authority with official 
corporate seal . For those who apply  no more than two models  in each 
range , a copy of  the test report on energy efficiency of all models of 
product shall be  submitted with offi cial corporate seal.  
(3) Registration of serial models:  For application for more than five 
models of each category of Water Pumps , the product dealer shall 
provide a copy of the test report on e nergy efficiency of full impeller 
diameter and minimum trimmed  impeller diameter of four models of 
designated product s with official corporate seal . While applying for 
the regis tration of Water Pumps energy efficiency of no more  than 
four models of product s, the t est report on e nergy efficiency of full 
impeller diameter and minimum trimmed  impeller diameter of all 
models of product s shall be submitted with official  corporate seal.  
For registration of single model, Water Pumps with either different 3 
 rated power, number of poles of motors, drive link method, inlet and 
outlet diameter or impeller diameter shall be deemed Water Pumps of 
different basic models.  For registration of s erial models, Water Pumps 
with either different number of poles of motors, drive link method or 
the maximum (full) impeller diameter shall be deemed Water Pumps of 
different series.  
The energy efficiency test report mentioned in Section 4 .(2)and 4.(3) 
shall be issued by  laboratories approved by the  certified authorities 
that are members to the mutual recognition agreement signed by the 
Taiwan Accreditation Foundation (“TAF”) and  the International 
Laboratory Accreditation Cooperation (“ILAC”), or  be iss ued by 
Underwriters Laboratories Inc. (“UL”) or  Technischer Überwachungs -
Verein (“TÜV”).  
5. The Central Competent Authority shall approve the registration number 
of the product  in accordance with  the energy efficiency test report and 
energy efficiency rated value registered by the  product  dealers . The 
Central  Competent  Authority may conduct product sampling and testing  
before approv ing, and the  product  dealer shall bear the related  costs.   
6. When manufacturing or importing the Water Pumps  for domestic use , 
the product  dealer shall re -apply for the registration for the energy 
efficiency  and be approved the registration number of the product by 
the Central Competent Authority in the following instances : 
(1) The design of the product has been  changed and such change affects 
its energy efficiency.  
  (2) The product model number has been changed.  
7. While manufacturing or importing the products  for domestic use , the 
product dealer shall post the following items on metal nameplates on 
a prominen t area of the product s. These items shall all be labeled in 
Traditional Chinese, provided that the  unit symbols, special 
characters, trademark and symbol  cannot  be indicated in Traditional 
Chinese. The  product  dealer shall not conceal, destroy or in any ot her 
way  make the following information unrecogni zable:  
    (1) Name of the product:  end suction single stage own bearing 4 
 rotodynamic  water pumps  (or ESOB water pumps) , end suction 
single stage close coupled rotodynamic  water pumps  (or ESCC  
water pumps),  and end suction single stage close coupled inline 
rotodynamic  water pumps  (or ESCCi water pumps) ; 
    (2) Product model number: d ifferent  single  model  or series  models s hall 
have different model numbers . The model number of Bare  Pumps 
shall be different from Pump Units. The model number for Bare 
Pumps shall be XXX -poles+B, and the model number for Pump 
Units shall be  XXX- poles+BM;  
    (3) Rated power (kW): it shall refer to the  rated output power of  
motors ; if this information  has been  labeled on the nameplate of 
motor  in the Pump Units, it can be omitted;  
    (4) Rated voltage(V) and frequency(Hz) : if this information has been 
labeled on the nameplate of motor  in the Pump Units , it can be 
omitted;  
(5) Speed  (rpm): it shall r efer to the  speed of the pump at the best 
efficiency point;  
(6) Inlet and outlet diameters ( millimeter, mm) : it shall be l abel ed as 
inlet diameter  × outlet  diameter , e.g., 100×80mm;  
    (7) Full (or maximum)  impeller  diameter  (millimeter, mm); 
(8) Trimmed impeller diameter  (millimeter, mm), if impeller  is not 
trimmed , it can be omitted;  
(9)Flow rate at best efficiency point ( square meter/ minute, m3/min) : 
flow rate at full impeller shall be labeled, i f the impeller is 
trimmed , flow rate  at trimmed impeller shall be labeled;  
(10) Head at best efficiency point  (meter,  m): head at full impeller shall 
be labeled, if  the impeller is trimmed,  head at trimmed impeller 
shall be labeled;  
(11) Hydraulic pump e fficiency at best efficiency point (%):  efficiency 
at ful l impeller shall be labeled, if  the impeller is trimmed, 
efficiency at trimmed impeller shal l be labeled; otherwise ; 
(12) Energy Efficiency index  EEI: Pump Units shall be labeled ; 5 
 (13) Product registration number;  
(14) Number and year of manufacture;  
(15) Production country or region;  
(16) Name of the manufacturer or OEM consigner : for imported 
products , the name of the manufacturer or OEM consigner  and   
agent (or distributor ) shall be labeled.  
  Water Pumps  shall be labeled in conformity with the requirem ents set 
forth in the preceding paragraph while  being exhibited or sold . 
8. The product dealer shall report the volume of product sales of the 
preceding  year in the Management System by  end of February each 
year .  
9. The Central  Competent  Authority may designate the model and volume 
of Water Pumps annua lly for  product sampling and testing.  The product  
dealer shall send such  product to the designated testing laboratory for 
testing within the period  informed by the Central Competent Authority . 
The measured  energy efficiency value of the Bare Pumps should be 
above 97% of the product rated  value and comply with the minimum 
energy performance standard requirements ; the measured energy 
efficiency  index values of the Pump Units should be below 103% of the 
product rated  value and comply with the minimum energy performance 
standard requirements . 
For products fail to meet the requirements in preceding  paragraph , the 
Central Competent Authority will request related manufacturers to re-
submit samples for re -testing. The re -tested samples shall be of the 
same model and twice as many as the first -tested samples. All the 
incurred cost associated with the re- testing shall be borne by 
manufacturers.  
10.The volume of the sampling and testi ng products in Section 9 shall be 
determined based on the totality of the products sold in the preceding 
year  ,according to the following rules :  
(1)O ne sample shall be tested out of 200 units of end suction single 
stage own bearing rotodynamic water pumps , a maximum of 5 units 
for each dealer, while there are less than 200 units sold, one sample 6 
 shall still be tested;  
(2)One sample shall be tested out of 200 units of end suction single 
stage close coupled rotodynamic water pumps, a maximum of 5 units 
for each dealer, while there are less than 200 units sold, one sample 
shall still be tested;  
(3)One sample shall be tested out of 100 units of end suction single 
stage close coupled inline rotodynamic water pumps, a maximum of 
5 units for each dealer, while t here are less than 100 units sold, one 
sample shall still be tested.  
The Central Competent Authority may adjust the sampling model or 
volume based on actual needs.  
11.If the product testing or re -testing is not conducted, or if the re-tested 
samples do not completely comply with the requirements, the Central 
Competent Authority shall act in accordance with Articles 21 and 24 of 
the Energy Management Act. For those fail to complete the corrective 
actions within the designated period, the Central Competent Authority 
shall nullify its energy efficiency registration,  provided that the prod uct 
dealer fails to conduct the energy efficiency tes t due to the fact that the 
designated sampling and testing products are no longer produced or 
imported , and the Central  Competent Authority has approved and 
cancel ed its energy efficiency registration.   
The Central  Competent  Authority shall disclose the information under 
the preceding paragraph  on the Management System pursuant to the 
Consumer Protection Act  and the relevant regulations .   
 
 7 
 Appendix 1  
Applicable  Scope of  Rotodynamic  Water Pumps  
1. Applicable Scope  
This standard applies to rotodynamic  water pumps  including bare pump without motors and pump 
unit s with motors , which have rated fre quency of 60Hz, rated power of 0.75 (1HP) to 200kW  
(270HP), volume flow rate  of greater than or equal to 6m3/hr., head  of less than or equal to 140m , 
and driven by a three -phase motor with nominal speed  of 3600rpm (2 poles) or 1800rpm (4 poles), 
the illustrations as follow : 
(1) End S uction S ingle S tage O wn Bearing rotodynamic  water pumps (ESOB  water pumps ): 
An end suction single stage rotodynamic water pump in which l iquid enters the pump in a direction 
parallel to the impeller shaft and is discharged through a volute in a plane perpendicular to the 
shaft , the driving motor component remains dry, a sealed shaft connection between the impeller 
in the pump body and the motor , and is equipped with own bearings.  
(2)End S uction S ingle S tage C lose C oupled rotodynamic  water pumps  (ESCC  water pumps ): 
An end suction single stage rotodynamic  water pump  in which liquid enters the pump in a direction 
parallel to the impeller shaft and is discharged through a volute in a plane perpendicular to the 
shaft , the driving motor component remains dry, a sealed shaft connection between the impeller 
in the pump body and the motor, and the motor shaft is extended as the pump shaft. 
(3) End Suction Single Stage Close Coupled Inline rotodynamic  water pumps  (ESCCi   water 
pumps ): 
An e nd suction single stage rotodynamic  water pump  in which liquid enter s and is discharged 
through a volute in a plane perpendicular to the shaft, the driving motor component remains dry and the motor is mounted on the top, a  sealed shaft connection between  the impeller in the pump 
body and the motor , the motor shaft is extended as the pump shaft , and the water inlet and outlet  
of the pump is on the same axis .  
2. Excluded Items : 
(1) water pumps designed specifically for pumping clean water at temperatures below – 10 °C or 
above 120 °C;  
(2) water pumps designed only for fire -fighting applications , and the overall unit ( including pump 
body, motor and other ancillary facilities ) has obtained the fire fighting  pump certification of the 
Competent  Authority . 8 
 (3) displacement water pumps: means a water pump that moves clean water by enclosing a volume 
of clean water and forcing this volume  of water  to the outlet of the pump 
(4) self -priming water pumps : means a water pump that moves clean water which can start and/or 
operate when only partly filled with water;  
(5) axial flow pump  or mixed flow pump which liquid is discharged through a volute in a plane non-
perpendicular to the  impeller shaft  
3. The product dealer claims to be out of the applicable scope  while manufacturing or importing the 
Water Pumps for domestic use ,  or claims that the product is not for domestic use, the Central 
Competent Authority may  require the product dealer  to provide design information or shipment 
details  and other relevant documents. 
 9 
 Appendix 2  
Minimum Energy Performance Standard Requirements for  Rotodynamic  Water 
Pumps   
 
1.The energy efficiency  standard for  Water Pumps  (without motors ,  namely, “Bare Pumps ”) shall be 
calculated according to the following formulas:  
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵  =88.59 𝑥𝑥+13.46 𝑦𝑦−11.48 𝑥𝑥2−0.85 𝑦𝑦2−0.38 𝑥𝑥𝑦𝑦−𝐶𝐶     (a ) 
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝑃𝑃   = 0.947 ×  𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵                                                         (b)                              
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝑂𝑂𝑃𝑃  = 0.985 ×  𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵                                             (c) 
𝑥𝑥 = ln(𝑛𝑛𝑠𝑠) , 𝑦𝑦 = ln(Q100%) , Q100%：volume flow rate of the water pump at best efficiency point 
(m3/h) 
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵：energy performance standard  of the water pump at best efficiency point  (%); 
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝑃𝑃：energy performance standard  for the operating point of the  water pump at 75 % of the 
flow at best efficiency point (%);   
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝑂𝑂𝑃𝑃：energy performance standard for the operating point of the water pump at 110 % of the 
flow at best efficiency point (%);  
ns：specific speed of pump ( min-1 ), 𝑛𝑛𝑠𝑠=𝑛𝑛∙�Q "100%
(1
𝑖𝑖H100% )3/4 , n: the revolutions per minute of the 
shaft (rpm);  
Q"100%：volume flow rate of the water pump at best efficiency point (m3/s); 
H100%：head  of the water pump at  best efficiency point  (m); \ 
𝑖𝑖：the number of series impellers in the water pump  
C : a constant of  efficiency for different pump types.  
Type  C value  
end suction single stage own 
bearing rotodynamic  water 
pumps  motor  (3600rpm)  128.07  
motor (1800rpm)  130.27  
end suction single stage close coupled rotodynamic  
water pumps  motor  (3600rpm)  128.46  
motor  (1800rpm)  130.77  
end suction single stage close coupled inline 
rotodynamic  water pumps   motor (3600rpm)  132.30  
motor  (1800rpm)  133.69  
Note: (1)Formula (a), (b), (c) apply to W ater P umps with  full impeller diameter.  
(2)Best efficiency point means the operating point of water pumps  at which it is at the maximum 
hydraulic pump efficiency measured with clean cold water.  10 
 (3)The measured energy efficiency value of  bare pumps shall not be lower  than  𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵，
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝑃𝑃 ，𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝑂𝑂𝑃𝑃 as calculated by formula (a), (b), (c), and shall be higher  than or 
equal to the rated values of product.  
(4)The measured energy efficiency value of bare  pumps  shall be calculated to the first place 
of decimal fraction and rounded up after decimal fraction.  
(5) The volume flow rate (Q), head (H) and motor power input  (P) shall be translated to  the 
value on the basis of the nominal speed 3600rpm(2pole) or 1800rpm(4poles). The 
conversion equations are as follow:  
𝑄𝑄𝑖𝑖,𝑛𝑛𝑛𝑛𝑝𝑝𝑖𝑖𝑛𝑛𝑛𝑛 𝑠𝑠𝑝𝑝𝑠𝑠𝑠𝑠𝑠𝑠=𝑄𝑄𝑖𝑖(𝑛𝑛𝑛𝑛𝑛𝑛𝑛𝑛𝑖𝑖𝑛𝑛𝑛𝑛𝑛𝑛  𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠
𝑛𝑛𝑖𝑖) 
 
𝑃𝑃𝑖𝑖,𝑛𝑛𝑛𝑛𝑝𝑝𝑖𝑖𝑛𝑛𝑛𝑛 𝑠𝑠𝑝𝑝𝑠𝑠𝑠𝑠𝑠𝑠=𝑃𝑃𝑖𝑖(𝑛𝑛𝑛𝑛𝑛𝑛𝑝𝑝𝑖𝑖𝑛𝑛𝑛𝑛𝑛𝑛 𝑠𝑠𝑝𝑝𝑠𝑠𝑠𝑠𝑠𝑠
𝑛𝑛𝑖𝑖)3 
(6) The equations for  measured energy efficiency value of bare  pumps  is: 
𝜂𝜂over  efficiency ,𝑖𝑖=hydraulic  output  power   (Pℎ,𝑖𝑖)
motor  power  input( P1,𝑖𝑖)×100%   
𝜂𝜂over  efficiency ,𝑖𝑖=hydraulic  output  power (Pℎ,𝑖𝑖)
power transmitted  to the pump  by its motor   (P2,𝑖𝑖)×100%   
        =hydraulic  output  power (Pℎ,𝑖𝑖)
motor  power input�𝐵𝐵1,𝑖𝑖�×motor efficiency (𝜂𝜂𝑛𝑛𝑛𝑛𝑚𝑚𝑛𝑛𝑚𝑚,𝑖𝑖)×100%  
        =𝜂𝜂overall  efficiency ,𝑖𝑖 
 motor  efficiency (𝜂𝜂𝑛𝑛𝑛𝑛𝑚𝑚𝑛𝑛𝑚𝑚,𝑖𝑖)×100%  
𝑃𝑃ℎ,𝑖𝑖=𝜌𝜌𝑔𝑔 𝑄𝑄𝑖𝑖 𝐻𝐻𝑖𝑖 (kW) 
Where:  
𝑖𝑖: load point corresponding to 75%, 100%, and 110% of BEP  (best efficiency point)  flow  
rate 
𝑛𝑛𝑖𝑖: speed at 75%, 100%, and 110% of BEP flow  rate 
𝑛𝑛𝑛𝑛𝑛𝑛𝑝𝑝𝑖𝑖𝑛𝑛𝑛𝑛𝑛𝑛 𝑠𝑠𝑝𝑝𝑠𝑠𝑠𝑠𝑠𝑠: 3600rpm or 1800rpm  
𝑄𝑄𝑖𝑖、𝐻𝐻𝑖𝑖、𝑃𝑃𝑖𝑖: the measured volume flow  rate (m3/s), head  (m),  and motor power input  
(kW) at load point i  of the tested pump 
𝑃𝑃ℎ,𝑖𝑖: the measured hydraulic output power at load point i of the tested pump (kW) 
𝑃𝑃1,𝑖𝑖: the measured motor power input  at load point i of the tested pump (kW)  
𝑃𝑃2,𝑖𝑖: the measured power transmitted to the pump by its motor at load point i of the tested 
pump (kW)  
𝜂𝜂𝑝𝑝𝑛𝑛𝑚𝑚𝑛𝑛𝑚𝑚,𝑖𝑖: motor efficiency  at load point i (%) 
𝜌𝜌: density of water  delivered by pump (kg/m3) 
𝑔𝑔: local acceleration due to gravity (m/sec2) calculated according to the equations under 
CNS16017 or ISO 9906  𝐻𝐻𝑖𝑖,𝑛𝑛𝑛𝑛𝑝𝑝𝑖𝑖𝑛𝑛𝑛𝑛 𝑠𝑠𝑝𝑝𝑠𝑠𝑠𝑠𝑠𝑠=𝐻𝐻𝑖𝑖(𝑛𝑛𝑛𝑛𝑛𝑛𝑝𝑝𝑖𝑖𝑛𝑛𝑛𝑛𝑛𝑛 𝑠𝑠𝑝𝑝𝑠𝑠𝑠𝑠𝑠𝑠
𝑛𝑛𝑖𝑖)2 11 
 (7) When the registration  for serial models is applied for Water Pumps , the related information 
including efficiency of maximum (full) impeller and minimum trimmed impeller shall 
both be registered. The measured energy efficiency values shall not be lower than the  
energy performance standard  at three load points (75%, 100%, and 110% of BEP flow) 
of maximum (full) impeller and shall be higher than or equal to the product rated value. 
The energy perform ance standard  of the  Bare  Pumps  with minimum  trimmed 
impeller ,𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵 ,𝑚𝑚𝑚𝑚𝑖𝑖𝑝𝑝𝑝𝑝𝑠𝑠𝑠𝑠 ,shall be 90% of the energy performance standard of the 
maximum (full) impeller at best efficiency point  𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵. The measured energy 
efficiency values of the Bare Pumps  with trimmed impeller shall not be lower than the 
energy performance standard , 𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵 ,𝑚𝑚𝑚𝑚𝑖𝑖𝑝𝑝𝑝𝑝𝑠𝑠𝑠𝑠  , and shall be higher  than or equal to 
the product rated value .  
(8) The approved serial models for Water Pumps , the measured energy efficiency values at 
best efficiency point of all impeller diameter between minimum trimmed impeller and 
maximum (full) impeller shall be not lower than the energy performance standard  of 
minimum trimmed impeller  diameter at best efficiency point ,  𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵 ,𝑚𝑚𝑚𝑚𝑖𝑖𝑝𝑝𝑝𝑝𝑠𝑠𝑠𝑠 , and 
shall be higher  than or equal to the product rated value.  
(9) Test requirements:  
I. The test shall be conducted with at least  seven flow points , the flow points shall be 
selected at  40%, 60% , 75% , 90%, 100% , 110% , and 120 % of the expected  Best 
Efficiency Point ( BEP) flow rate of the pump. For pumps that cannot be tested to flows 
beyond 120% of the expected BEP, the test shall be conducted at the flow points of  
40%, 50% , 60% ,70% , 80%, 90%  and 100%  of the expected BEP flow rate.  
II. The curve of best fit of efficiency versus rate of flow for the determination of BEP 
shall be a polynomial up to 6th order function in the region of the BEP rate of flow 
and with the maximum R2 value, indic ating the value of best fit.  The curve of best fit 
of the pump total head versus flow rate shall be a polynomial up to the 6th order 
function and with the maximum R2 value, indicating the best fit.  
III. The head and motor input power at 75%, 100%, and 110%  of the BEP flow rate  shall 
be determined  according to regression analysis.  
 
2. The energy efficiency index EEI for Water Pumps  (with motors  , namely, “Pump Units” ) shall be 
calculated according to the following formulas:  
(1)energy performance standard  of the Water Pumps with the maximum (full) impeller at best 
efficiency poin t,  𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵, or the energy performance  standard of  Water Pumps with 
minimum trimmed impeller at best efficiency point, 𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵 ,𝑚𝑚𝑚𝑚𝑖𝑖𝑝𝑝𝑝𝑝𝑠𝑠𝑠𝑠 , shall be calculated  
according to formulas in the preceding paragraph.  
(2) The r eference motor power input , 𝑃𝑃1,𝑚𝑚𝑠𝑠𝑟𝑟, shall be calculated:  
𝑃𝑃1,𝑚𝑚𝑠𝑠𝑟𝑟=𝑃𝑃2,𝑚𝑚𝑠𝑠𝑟𝑟
𝜂𝜂𝑝𝑝𝑛𝑛𝑚𝑚𝑛𝑛𝑚𝑚,𝑚𝑚𝑠𝑠𝑟𝑟 
 12 
 𝑃𝑃2,𝑚𝑚𝑠𝑠𝑟𝑟=𝑃𝑃ℎ,𝑚𝑚𝑠𝑠𝑟𝑟
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵  or 𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵 ,𝑚𝑚𝑚𝑚𝑖𝑖𝑝𝑝𝑝𝑝𝑠𝑠𝑠𝑠 
 
𝑃𝑃ℎ,𝑚𝑚𝑠𝑠𝑟𝑟=𝜌𝜌𝑔𝑔𝐻𝐻100% (𝑄𝑄100% /3600 )
1000 
𝑃𝑃1,𝑚𝑚𝑠𝑠𝑟𝑟：reference motor power input of the maximum (full) impeller  or minimum trimmed 
impeller  (kW)  
𝑃𝑃2,𝑚𝑚𝑠𝑠𝑟𝑟 ：reference power transmitted to the pump by its motor of the maximum (full) impeller  or 
minimum trimmed impeller (kW)  
 𝑃𝑃ℎ,𝑚𝑚𝑠𝑠𝑟𝑟 ：reference hydraulic output power of the maximum (full) impeller or minimum trimmed 
impeller (kW) 
𝜂𝜂𝑝𝑝𝑛𝑛𝑚𝑚𝑛𝑛𝑚𝑚,𝑚𝑚𝑠𝑠𝑟𝑟：full load efficiency of three phase induced motor equipped for the maximum (full) 
impeller or minimum trimmed impeller  of  Water Pumps  (%)，if the motors apply to 
IE3 regulation shall be meet . 
𝑄𝑄100% , 𝐻𝐻100%  ：volume flow  rate( m3/s), head(m) of the maximum (full) impeller or minimum 
trimmed impeller  
𝜌𝜌= the density of water is 1000 kg/m3 for calculat ing 𝑃𝑃ℎ,𝑚𝑚𝑠𝑠𝑟𝑟 
𝑔𝑔= acceleration due to gravity is 9.81m /s2 for calculating  𝑃𝑃ℎ,𝑚𝑚𝑠𝑠𝑟𝑟 
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵：energy performance  standard of the maximum (full) impeller at best efficiency point 
(%) 
𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵 ,𝑚𝑚𝑚𝑚𝑖𝑖𝑝𝑝𝑝𝑝𝑠𝑠𝑠𝑠：energy  performance  standard of the minimum trimmed impeller at best 
efficiency point (%) is 0.9× 𝜂𝜂𝑝𝑝𝑝𝑝𝑝𝑝𝑝𝑝 ,𝐵𝐵𝐵𝐵𝐵𝐵   
(3) E nergy efficiency index EEI for the maximum (full) impeller or minimum trimmed impeller of 
Pump Units shall be calculated : 
I. The weighted average motor power input  𝑃𝑃1,𝑛𝑛𝑎𝑎𝑎𝑎 shall be calculated as:  
𝑃𝑃1,𝑛𝑛𝑎𝑎𝑎𝑎=�(∆𝑡𝑡
100)𝑖𝑖3
𝑖𝑖=1𝑃𝑃1,𝑖𝑖 
 𝑖𝑖 : load point corresponding to 75%, 100%, and 110% of BEP flow rate of maximum (full) 
impeller  or minimum trimmed impeller  
𝑃𝑃1,𝑖𝑖  : the measured motor power input of the maximum (full) impeller or minimum 
trimmed impeller at 75%, 100%, and 110% of BEP flow rate (kW)  
∆𝑚𝑚
100 : the reference flow -time profile, as    
Flow Q in % of 100%  75% 100%  110%  
∆𝑡𝑡
100 25% 50% 25% 
 
II. The energy efficiency index EEI shall be calculated as:  13 
 EEI =𝑃𝑃1,𝑛𝑛𝑎𝑎𝑎𝑎𝑃𝑃1,𝑚𝑚𝑠𝑠𝑟𝑟⁄   
The energy efficiency index EEI  shall be calculated to the third place of decimal fraction 
and rounded up after the fourth decimal fraction.  
III. T he measured EEI for the maximum (full) impeller of Pump Units  shall not  be higher than  
0.988 and the product rated value. The measured EEI for the minimum trimmed impeller 
of Pump Units shall not be higher than the EEI for the maximum (full) impeller of Pump 
Units and the product  rated value.  
IV. When the registration for serial models is applied for Water Pumps, the related information 
including efficiency of Bare Pumps and  EEI of Pump Units for maximum (full) impeller 
and minimum trimmed impeller shall both be registered, and th e measured energy 
efficiency of Bare Pumps and  EEI of Pump Units for maximum (full) impeller and 
minimum trimmed impeller shall both comply with  energy performance standard.  
IV. The approved serial models  is applied for Water Pumps , the measured EEI of all  impeller 
diameters between maximum(full) and minimum trimmed impeller diameter shall be not 
higher than the EEI of the maximum(full) impeller and the product rated value.  The motor 
power must also be within the range of motor power of the maximum  (full) impeller and 
minimum trimmed impeller. 14 
 Appendix 3  
Permitted Energy Consumption Standard Management System 
Account and Password Application Form  
Prepared on (ROC year,  month,  date)  
 
Applicant (Company):                                      
Applicant:             Tel:              Fax:                  
E-MAIL:                                               
 
Category of the Product:                                   
Account ID:                                               
Password:                                                
 
This company is applying for log- in and use of the Permitted Energy Consumption 
Standard Management System , and will be responsible for all information registered.  
Stamp  (seals of the company and the responsi ble person):  
 
 
 
 
 
             (official seals of the company and responsible person)  
 
    15 
 Appendix 4  
 
   
Energy Efficiency Performance Standard  Registration Application 
Form for the Water Pumps  
Prepared on (ROC year,  month,  date)  
1. Applicant ( Product Dealer) Information  
Company name:                                     
Company address:                                      
Responsible Person:          Business ID:                      
Contact:           Department:           Title:             
Tel:             Mobile:           Fax:               
Email:                                           
2. Manufacturer Name and Address  
  □same as the A pplicant  
Manufacturer name:                                    
Manufacturer address:                                   
3. Contents of Registration  
 Application number:  16 
 No. Model 
No. Name  motor 
rated 
power 
(kW)  Motor 
type/  
Mode  
/pole  
 Rated 
voltage  
(V)/  
 Rated 
frequency(
Hz) Inlet / 
outlet 
diameter 
of pump 
(mm)  Full impeller  (three load points)  Trimmed impeller  
Production 
country or 
region  Energy 
Efficiency 
Index  
(EEI)  pump  
dimensions  diameter 
(mm)  Flow 
rate 
(m3/m
in) Head 
(m)  Bare 
pump 
efficiency 
(%)  speed  
at BEP  
(rpm)  diameter 
(mm)   
Flow 
rate at 
BEP 
(m3/min
) Head 
at BEP   
(m) pump 
efficienc
y  
at BEP  
(%) speed  
at BEP  
(rpm)  
1.                     
2.                     
3.                     
Note: 1. Information of trimmed impeller  can be omitted if impeller is not trimmed;  
2. For serial models, information of the full impeller and minimum trimmed impeller shall be filled in.  
3. Three load points refer to volume flow, head and efficiency at 75%, 100%, 110% of the flow at the best efficiency point.  
4. Product Dealer shall log  in the  Minimum Energy Performance Standard Management System to fill out the application form and 
download for further use. 
4. Application D eclaration and Affidavit  
This company hereby declares to the central competent authority that all information contained in this a pplicatio n is true , and this 
company will  be responsible for false, if any, and  bear all legal liabilities . This company hereby declares that products available 
on the markets shall have the same energy efficiency  labelling information as given in this application form. In case of any false, 
this company, without any objection, shall be subject to registration revocation and any disposition under the energy managem ent 
regulations.  
Stamp  (Seals of company and responsible person )  
 
 
 
(official seals of company and responsible person  17 
 5. Power of Attorney (not applicable for applicants apply for registration by 
themselves)  
For those apply for registration through attorney(s), the attorney(s) shall be approved by 
the applicants.  
 
Company Name of the Attorney:  
Responsible Person:  
Address:  
Business ID:  
Tel:  
 
 
 
              
(official seals of company and responsible person )