هيئة الإمارات للمواصفات والمقاييس  
 Emirates Authority For Standardization & Metrology 
(ESMA)  
 
    
 
  
المواصفة القياسية الإماراتية  
UAE.S 5042 : 2020  
 
بطاقة البيان– بطاقة كفاءة إستهلاك الطاقة للمصاعد  
Labeling –Energy Efficiency Label for lifts  
 
 
 
 
 
دولة الإمارات العربية المتحدة 
UNITED ARAB EMIRATES 
 
حقوق الطبع محفوظة لهيئة الإمارات للمواصفات والمقاييس  
 
 
 
UAE.S 5042                                                            UAE  Standard                                                                                             
  
بطاقة البيان– بطاقة كفاءة إستهلاك الطاقة للمصاعد  
 
Labeling –Energy Efficiency Label for lifts  
 
 
 
 
تاريخ إعتماد مجلس الوزراء 2020     /   /  
صفة الإصدار : لائحة فنية  
 
المواصفات القياسية الإماراتية لدولة الإمارات العربية المتحدة  
Standards of United Arab Emirates  
 
/  /2020  تاريخ إعتماد مجلس الوزراء  
Technical Regulation  صفة الإصدار  
 
 
 
حقوق الطبع محفوظة لهيئة الإمارات للمواصفات والمقاييس  
 
 
 
 
 
 UAE.S 5042                                                            UAE  Standard                                                                                             
 Labeling –Energy Efficiency Label for lifts  
 
1- Scope  
This standard  specified Energy classification system  and measuring actual energy 
consumption of lifts, on single unit basis. This only considers the energy performance 
during the operational portion of the life cycle  of the lifts.  
This standard  does not cover energy aspects, which affect the measurement, 
calculations and simulation such as the following:  
- Hostway  lighting  
- Heating and cooling equipment  in the lift car.  
- Machine room heating, ventilation, and air conditioning.  
- Machine room lighting.  
- Non-lift display system , CCTV secure cameras ,  
- Non –lift monitoring system (e.g. building management systems, etc.  
- Effect of lift group dispatching on energ y consumption.  
- Consumption through the power sockets  
- Lifts whose travel includes an express zone.  
 
2- Applicable Standards  
 
- UAE.S ISO 25745 -1 :2012 : Energy performance of lifts, escalators  and moving walks  
 Part 1:  Energy measurement and verification  
- UAE.S ISO 25745 -2: 2015 : Energy performance of lifts, escalators  and moving walks  
Part 2:  Energy calculation and classification  for lifts (elevators) . 
 
3- Technical Terms and definitions  
For the purposes of this standard, the terms and definitions in annex (1) are applied.  
 
4- Calculation of energy performance of the lift  UAE.S 5042                                                            UAE  Standard                                                                                             
  
4.1 Classification of energy performance of the lift  
The energy performance of the lift shall be classified as following:  
Table 1 “Classification of energy efficiency”  
Energy efficiency class  Energy consumption per day (Wh)  
5 star  Ed  ≤  0.72×Q×  nd× sav/1000 +50×  tnr 
4 star Ed  ≤  1.08×Q×  nd× sav/1000 +100×  tnr 
3 star  Ed  ≤  2.43×Q×  nd× sav/1000 +400×  tnr 
2 star  Ed  ≤  3.65×Q×  nd× sav/1000 +800×  tnr 
1 star  Ed > 5.47×Q×  nd×sav/1000 +1600×  tnr 
 
 Where : 
Ed: Energy consumption per day (Wh)  
nd: is the number of trips per day  . 
Q: is the rated load (kg)  
Sav: is the average travel distance for target installation (m).  
tnr: is the non – running (idle and standby) time per day (h).  
Note : The value of ( nd) shown in Table 1 is taken t he exact number  of trips ( nd) where  it is known.  If it is 
not known , the median value for ( nd) taken from annex 2  of this standard.  
4.2 Calculating the t otal energy consumption per day  
The estimated daily energy consumption (Wh) is given  by following:   
Ed = Erd + Enr                                                                              
Where  
- Ed :  is the total daily energy consumption (wh).  
- Erd : is the  daily running energy consumption ( Wh).  
- Enr : is the d aily non -running (idle and standby) energy consumption  ( Wh).  
4.2.1 Calculating the Daily running energy  UAE.S 5042                                                            UAE  Standard                                                                                             
 The daily running energy consumption is given by the following:   
Erd = KL X nd X Erav/2  
Where  
- Erav :  is the running energy consumption of an average cycle (Wh).  (see annex 2)  
- KL : is the load factor .  (see annex 2)  
- nd  : is the number of trips per day according to the selected usage category.(see 
annex 2)  
 
 4.2.2 Calculating the Daily non -running (idle and standby) energy 
consumption  
The Daily non -running (idle and standby) energy consumption is given by following :  
Enr: tnr/100 (Pid Rid + Pst5 Rst5 + Pst30 Rst30 )                                    
Where  
- Pid: is the power used in idle mode (W).  
- Rid : is the ratio of idle time consuming Pid(%). ( see annex 3 )  
- Pst5: is the standby power used after 5 minutes ( W).  
- Pst30 : is the standby power used after 30 minutes (W).  
- Rst5 : is the ratio of 5 minutes time consuming Pst5(%). ( see annex 3 )  
- Rst30: is the ratio of 30 minutes time consuming Pst30 (%). ( see annex 3 ) . 
 
4.3 Total energy consumption per year  
The estimated annual energy  consumption ( Wh) is given by following :   
                     Ey = Ed x dop                                                                               
Where  
Ey  : is the annual energy consumption  
dop: is the number of operating days per year .  
 If the lift is switched off on certain days (e.g. Weekends  or holidays) the  number of 
days per year can be reduced by the number of days is switched off per year.  
4.4 Specific running energy for the reference cycle  UAE.S 5042                                                            UAE  Standard                                                                                             
 The specific running energy (Espr) for the reference cy cle can be calculated using the 
energy (Ersc ), measured according to UAE.S ISO 25745 -1 and is given by : 
 
Espr = 1000×E rc / 2×Q× src 
Where  
- Espr is the specific running energy for reference cycle mWh/(kg.m)  
 
5- Reporting  
The results of the energy assessment shall be documented and shall include the 
following:  
— name of manufacturer;  
— type of lift;  
— drive system type;  
— rated load (kg);  
— rated speed (m/s);  
— average acceleration (m/s2); 
— average jerk (m/s3); 
— travel he ight (m);  
— number of stopping floors;  
— number of trips per day;  
— usage category;(annex 2 )  
— idle power (W);  
— standby power (Pst5) (W);  
— standby power (Pst30) (W);  
— time(s) to reach standby mode(s);  
— time(s) to recover from standby mode(s);  
— operating days per year;(annex 2 )  
— estimated annual energy consumption (kWh);  
— specific running energy for the average cycle mWh/(kg·m);  
— classification of lift (number of stars);  
— specific running energy for the reference cycle mWh/(kg·m);  
 
 
6- General rules  and requirements  
- Energy classification system applied on new, existing and modernized traction lifts 
on a single unit basis.  UAE.S 5042                                                            UAE  Standard                                                                                             
 - in case of identical lifts, the energy consumption value for one of the lifts can be 
measured and calculation made, it may then be applied to the other lifts provided 
that verification of equivalence can be justified.  
- in case of groups of lift installation, each unit shall be considered as an individual 
unit.  
- If the representative sample of a family of lifts has a range of rated speeds, a 
class ification for each speed shall be determined.  
- All parameters and components that may affect energy usage shall be the same as 
on the sample lift, changes to any of these components or parameters shall 
require a reclassification.  
 
 
 
 
 
 
 
 
 
 
 
 
 UAE.S 5042                                                            UAE  Standard                                                                                             
 Annex 1 -  
Technical Definitions  
 
 
Elevator : A permanent elevating e quipment serving defined floors , comprising a car 
whose dimensions and means of construction clearly permit the access of passengers 
or other loa ds, running at least partially between rigid vertical guides whose inclination 
to the vertical is not more than 15°.  
Average cycle : cycle of one up and one down trip each covering the average travel 
distance of the target installation  including two complete door cycles.   
Energy:  power consumed over time.  
Idle condition:  condition when the lift is stationary at floor following a run before the 
standby mode is entered.  
Load factor: ratio between the running used by a car carrying an ave rage load and the 
running energy measured with an empty car.  
Reference cycle :  cycle during which the empty car is run from the bottom terminal 
landing ,to the top terminal landing , and then back to the bottom terminal landing 
including two complete door cycles .  
Running current: current  drawn by the lift, when it has achieved rat ed speed in either 
the up or down direction.  
Express zone: section of the lift well there are no loading entrance whose length is more 
than three average floor heights.  
Short cycle : cycle during which the empty car is run for a travel distance of a least o ne 
– quarter of the total travel height with the travel distance centered around the mid -point 
of the travel height and back to the starting point over a sufficient distance for the lift car 
to reach stable rated speed in both direction including two compl ete door cycles.  
Standby condition:  condition when a lift is stationary at a floor and may have reduced 
the power consumption to a lower level set for that particular lift.  
Standby current:  current used by the lift, when in standby condition.  
Trip (s) : movement (s) from a starting (departure) landing to the next stopping (arrival) 
landing not including re -leveling.  UAE.S 5042                                                            UAE  Standard                                                                                             
 Verification:  procedure to identify any significant changes in energy characteristics 
during the life of the lift, escalator or moving walk.  
Terminal landing cycling test:  test for lifts when the car is continuously cycled between 
the bottom terminal landing and the top terminal landing , with the door  operations 
enabled and no load in the car .  
Main power coupling point:  point where the main  power measurements are taken , 
and which is located at the output side of the main switch/disconnect for the lifts , 
escalator or moving walk.  
Ancillary current:  current  drawn by the ancillary circuit through the ancillary switch (es).  
 Ancillary  power: energy used by the ancillary equipment.  
Ancillary equipment:  equipment such as lighting, fans, heating, alarm devices and 
emergency battery supplies.  
Ancillary  power coupling point: point where ancillary measurements are taken, and 
which is located at the output side of the lift . 
 
 
 
 
 
 
 
 
 
 
 
 
 
 UAE.S 5042                                                            UAE  Standard                                                                                             
 Annex 2  
1. Specific usage category  
Table 2 - Number of trips per day (and operating days per years)     
Usage category  1 2 3 4 5 6 
Usage intensity 
frequency  Very low  Low Medium  High Very high  Extremely high  
Number of  trips per  
day (nd) typical 
range  50 
 
˂75 125 
 
75 to ˂ 200  300 
 
200 to ˂500  750 
 
500 to ˂1000  1500  
 
1000 to ˂ 2000  2500  
 
2000 to ≤ 2500 
Typical buildings 
and usage 
(operating days per 
year  Residential building 
up to 6 dwellings 
(360d)  
 
Residential care  
home (360d)  
 
Small office or 
administrative 
building with few 
operations (260d)  
 
 
Suburban railway 
stations ( 360d)  
 
 Residential 
building up to 20 
dwellings (360d)  
 
 
Small office or 
administrative 
building with 2 to 
5 floors (260d)  
 
 
 Small hotels 
(360d  ) 
 
Office care parks( 
260d)  
 
General car parks 
(360d)  
 
Main line railway 
stations(360d)  
 
 
Library (312d)  
Entertainment 
centres (360d)  
 
Stadia 
(intermittent)  
 
 Residential 
building  with 
up to 50 
dwellings 
(360d)  
 
 
Medium –
sized office or 
administrative 
building with 
up to 10 floors 
(260d)  
 
Medium –
sized hotel 
(360d)  
 
 
Airports 
(360d)  
 
University 
(260d)  
 
 
Small hospital 
(360d)  
 
Shopping 
centre (360d)  Residential 
building with 
more than 50  
dwellings (360d)  
 
 
 
Large office or 
administrative  
building with 
more than 10 
floors (260d)   
Large hotel 
(360d)  Very large office 
or administrative 
building over 
100m height 
(260d)  Very large office 
or administrative 
building over 
100m height 
(260d)  
Typical rated 
speed  0.63 m/s  1.00 m/s  1.60m/s  2.50m/s  5.00m/s  5.00 m/s  
 
 
 
 
 
 UAE.S 5042                                                            UAE  Standard                                                                                             
 2. The load factor ( KL ) value :  
The value for the load factor K L shall be calculated using the following:  
- For traction lifts counterbalanced to 50%,  
 KL= 1- (%Q × 0.0164).             
- For traction lifts counterbalanced to 40%,  
KL= 1- (%Q × 0.0192).              
- For traction lifts counterbalanced to 30%,  
 KL= 1- (%Q × 0.0197).              
- For hydraulic lifts with no balancing,   
KL= 1- (%Q × 0.0071).                      
- For hydraulic lifts with 35% counterbalancing of the car weight,   
KL= 1- (%Q   ×0, 0100).                                                                                                 
- For hydraulic lifts with 35% counterbalancing of the car weight,   
KL= 1- (%Q ×0, 018 7).      
                                                                                            
Traction lifts with no counterweight and positive drive lifts can be considered as a 
hydraulic lift with no balancing and calculations carried out accordingly.  
3. The average car load (%Q)  
The percentage average car load (%Q) is taken from the table (3)  :  
Table 3 – Average car load  
 
Usage category  1-3 4 5 6 
Rated load (kg)  Percentage of rated load (`Q)  
≤800  7.5%  9.0%  13% 19% 
801 to ≤ 1275  4.5%  6.0%  8.2%  13.5%  
1276 to ≤ 2000  3.0%  3.5%  5.0%  9.0%  
>2000  2.0%  2.2%  3.0%  6.0%  
 
 
 
 UAE.S 5042                                                            UAE  Standard                                                                                             
 4. Running energy of an average cycle with empty car  
The r unning energy  consumption of an average cycle  for the target installation is given by  the 
following : 
𝐸𝑟𝑎𝑣 =2(Erm x Sav+Essc)  
Where  
Erm: is the average running energy consumption per meter of travel (Wh/m).  
Sav: is the average travel distance for target installation (m).  
Essc: is the start /stop energy consumption for each trip (Wh) . 
The running energy of the average cycle can be determined directly by measurement, 
calculation, or simulation. In this case the above evaluation is not required.  
If the travel distance for a short cycle does not allow the rated speed to be reached , 
then running energy consumption of an av erage cycle for the target installation is given 
by the following : 
𝐸𝑟𝑎𝑣 = 𝐸𝑟𝑐 𝑥 𝑆𝑎𝑣 
𝑆𝑟𝑐 
5. Average travel distance  
The average travel distance ( sav) for the target installation shall be selected from 
tables (2)  : 
 
 Table 2  - Percentage  of average travel distance  
 
Usage Category  1-3 4 5 6 
Number of stopping floors  Percentage average travel distance  
2 100%  
3 67% 
>3 49% 44% 39% 32% 
 
6. Start /stop energy consumption  
The Start /stop energy consumption  for each trip is given by :  
                   Essc= ½(E rc-2xE rmxSrc) UAE.S 5042                                                            UAE  Standard                                                                                             
 7. Average running energy per meter  
The average running energy consumption per meter of travel shall be determined 
when the lift is running at rated speed by  using the following : 
 
Erm =1\2 ( (Erc −Esc)\(Src−Ssc)) 
 
Erc: is the running energy consumption of reference cycle  to ISO 25745 -1 (Wh).  
Esc: is the running energy consumption of the short cycle (Wh).  
Src: is the one - way travel distance of reference cycle  to ISO 25745 -1 (m). 
Ssc: is the one way travel d istance of the  short cycle (m).  
- Src and S sc are the one –way travel distances in each direction and need to be 
counted twice for the running distance of the complete cycle.  
 
 
Annex 3  
 
1. Time ratios of idle/standby modes  
The daily non -running (idle/standby) energy consumption can comprise three 
components:  
a) The time when idle between stopping and entering the 5 min standby mode;  
b) The time between the 5 min standby mode and the 30 min standby mode, if 
occurring;  
c) The time after 30 min have elapsed.  
This ratio shall be taken from  table (4) : 
Table (4) – Time ratios in idle and standby modes  
Usage category  1 2 3 4 5-6 
Time ratio  (%) Rid 13 23 36 45 42 
Rst5 55 45 31 19 17 
Rst30  32 32 33 36 41 
 UAE.S 5042                                                            UAE  Standard                                                                                             
 2. Non- running time per day  
 To calculate he energy used per day when the lift is in idle /stand modes, the n on – 
running time per day has to be determined, this non running time is usually 24 h less 
the running time and is given by  the following :   
tnr = 24 - trd                                                  
tnr: is the non -running (idle and standby) time per day (h).  
In cases where the lift is switched off at scheduled times, the non – running time has 
to be determined for this specific situation  
3. Running time per day   
 The total  running time per day.  trd, is  given , in hours (h) as following :   
trd = nd x tav/3600  
Where : 
tav : is the time to travel the average travel distance  for the target installation , including 
door time(s). The time  tav, is given as following : 
tav = (s av/v) + ( v/a)+ (a/j)+(t d) 
where  
td : is the time for the opening, remaining  open ,  and closing times of the lift doors at 
the landings.  
The value for a and j can be obtained by measurement or from a manufacturer’s 
standard tables where a, j, td values are not available, they shall be measured.