Incandescent general destination

Technical data of lamps

Lamp type

Power, W

Luminous flux, lm

Lamp type

Power, W

Luminous flux, lm

Incandescent general destination

NV127-15

NV 220-15

NV 127-25

NV 220-25

NB 127-40

NB 220-40

NB 127-60

NB 220-60

NB 127-75

NB 220-75

NB 127-100

NB 220-100

NG 127-150

NG 220-150

NG 127-200

NG 220-200

 

 

 

 

 

 

 

The end of the table 3.4

NG 127-300

NG 220-300

NG 127-500

NG 220-500

NG 127-750

NG 220-750

NG 127-1000

NG 220-1000

NG 127-1500

NG 220-1500

V215-225-25

NBK127-40

B215-225-40

NBK 127-60

B215-225-60

NBK 127-75

B215-225-75

NBK 127-100

B215-225-100

NBK 220-40

B215-225-150

NBK 220-60

B215-225-200

NBK 220-75

G215-225-300

NBK 220-100

G215-225-500

 

 

 

Incandescent  local destination

МО12-15

МО36-40

МО12-25

МО36-60

МО12-40

МО36-100

МО12-60

МО36-150

МО36-25

 

 

 

Fluorescent

LBV20

LTB 80

LBV40

LHB 20

LB20

LHB 40

LB40

LHB 65

LB65

LHB 80

LB80

LD20

LBW30

LD 40

LBК20

LD 65

LBК22

LD 80

LBК32

LDC20

LBК40

LDC 40

LTB20

LDC 65

LTB 40

LDC 80

 

Consumed power, W, of the lighting installation is calculated by the formula:

,                                       (3.5)

 

where p – lamp power, W; N – the number of lamps, pieces.; n – the number of lamps in the luminaire.

Example.It is necessary to calculate the required number and location of general purpose lights with luminescent lamps (LL) on the area of automated installations with overall dimension of 90×24×8 m in industrial premises. At the given industrial premises the work is carried out with following characteristics: the smallest size of object of distinction is 0.45 mm, the contrast of the object with the background is great, and background is medium. The condition of the air in the room is characterized by the average dustiness. It is necessary to determine the luminous flux of a group of lamps in the system of general uniform lighting, choose the lamp; to determine the power consumed by the lighting fixture. Data for calculation options are presented in table 3.5.

Solution.According to the value of the object of distinction at the table 3.1 we define that the nature of the visual work in this space corresponds to the III rank – high precision (accuracy) with subclass d. Thus, the normalized value of lighting is 200 lx.

Determination of the number of lamps and its distribution over the area of the room is done in following order:

The distance between the centers of the lamps L, m is determined by the formula (3.1):

L=1,75∙H =17,5∙8=14.

 

The height of suspension of fixtures above the work surface H_p shall be equal to the height of the room, that is H_p=8 m.

The number of lamps is determined by the formula (3.2):

pieces

The index space is calculated by the formula (3.4):

Depending on the index space i is the value of the utilization factor of luminous flux of lamps η=0,57.

Then the light from one group of lamps of the luminaire by fluorescent lamps is calculated by the formula (3.3):

lx.

According to the obtained value of the luminous flux and given the fact that the luminaire includes 4 lamps we choose the nearest standard lamp (see table 3.4.). For providing the calculated light flux should be chosen the lamps LB80.

Power consumption of the lighting installation according to the formula (3.3):

 W.

Tasks for self-training

 

It is necessary: to calculate the required number and location of general purpose luminaires with fluorescent lamps in the square of industrial premise, with the specified size; to determine the luminous flux of a group of lamps in general lighting uniform, choose the lamp; to determine the power consumed by the lighting fixture. Data for calculation options are presented in table 3.5. The variant number are corresponds to the sequence number in the log.

Table 3.5