3.2.1 Light intensity distribution; Distribution of light intensity 3.2.2 symmetrical light intensity distribution 3.2.3 rotationally symmetrical light intensity distribution 3.2.4 total flux 3.2.5 luminous flux in the lower hemisphere 3.2.6 upper hemisphere luminous flux 3.2.7 direct flux 3.2.8 Indirect flux 3.2.9 Reference plane reference surface 3.2.10 Working plane working plane 3.2.11 Luminaire calculation height calculating height of luminaire 3.2.12 utilization factor utilization factor 3.2.13 Room space ratio (3.2.13) a - room width; 3.2.14 room index (3.2.14) a - room width; 3.2.15 Average illuminance average illuminance 3.2.16 average brightness average luminance 3.2.17 Minimum illuminance minimum illuminance 3.2.18 Maximum illuminance 3.2.19 normal illuminance 3.2.20 Horizontal illuminance horizontal illuminance 3.2.21 vertical illuminance 3.2.22 Maintenance factor maintenance factor 3.2.23 Maintaining Average Illumination maintaineded average illuminance 3.2.24 Initial average illuminance 3.2.25 Uniformity uniformity ratio of illuminance 3.2.26 Average cylinder illumination average cylinderical illuminance 3.2.27 mean spherical illumination; scalar illumination average spherical illuminance, scalar illuminance 3.2.28 Illuminance Vector Illuminance Vector 3.2.29 point light source 3.2.30 line light source light sourec 3.2.31 Area light source area(surface) light source 3.2.32 (light source or luminaire) light center (of a light source or luminaire) 3.2.33 Lamp spacing spacing of luminaire 3.2.34 Mounting height of luminaire 3.2.35 Luminaire distance ratio spacing height ratio of luminaire 3.2.36 Luminaire maximum permissible ratio of height to maximum ratio 3.2.37 use coefficient method; lumen method of utilization factor, lumen method 3.2.38 point method 3.2.39 power per unit area 3.2.40 Illuminance ratio 3.2.41 mixed light source luminous flux ratio luminous flux ratio of combined light source 3.2.42 iso-intensity curve 3.2.43 iso-illuminance curve 3.2.44 Spatial iso-intensity curve spacing ISO-illuminance curve 3.2.45 iso-luminance curve ISO-luminance curve Automotive Split Braided Wire Loom
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The curve or table indicates that the light source or lamp has a luminous intensity value in each direction of the space.
The intensity distribution when there is an axis of symmetry or at least one plane of symmetry.
The light intensity distribution curve of the polar coordinate in the plane is the light intensity distribution obtained by rotating around the axis.
The sum of the luminous flux of the light source in the 4p spherical solid angle.
The total luminous flux of a light source or luminaire within 2p solid angle below the horizontal plane.
The total luminous flux within the 2p solid angle of a light source or luminaire on a horizontal surface.
Luminous flux from the lighting device is directly obtained on the surface.
The luminous flux obtained after reflection on the surface from other surfaces.
Measure or specify the plane of illumination.
A reference plane that works on its surface.
The distance from the light center of the lamp to the work surface.
The ratio of the luminous flux projected onto the reference plane to the nominal luminous flux of the light source in the lighting device.
Characterize the value of the room geometry. Its calculation formula is:
Where RCR - room space ratio;
B—the depth of the room;
c - lamp height calculation.
Characterize the value of the room geometry. Its calculation formula is:
Where K - the ventricular index;
B—the depth of the room;
h - lamp height calculation.
Specifies the average illuminance on the surface.
Specifies the average value of brightness on the surface.
Specifies the minimum illuminance on the surface.
Specifies the maximum illuminance on the surface.
The flat illuminance value perpendicular to the incident direction of light.
The illuminance at a point on the horizontal plane.
The illuminance value that is accepted at a point on the vertical plane.
The ratio of the average illuminance or the average illuminance on a specified surface of a lighting device to the average illuminance or average luminance obtained on a prescribed surface when the device is newly installed under the same conditions after a certain period of use.
The average illuminance on the surface should not be less than this value. It is the average illuminance on the specified surface at the time when the lighting device must be maintained.
The average illuminance on a given surface when the lighting device is newly installed. The initial average illuminance is obtained by dividing the predetermined maintenance average illuminance value by the maintenance coefficient value at the time of maintenance.
Specifies the ratio of the minimum illuminance to the average illuminance on the surface.
At a given point, the average illuminance on a very small cylindrical surface. The axis of the cylinder is usually erect.
At a given point, the average illuminance over the entire surface of a very small ball.
It is used to describe the directional characteristics of light at a point in space. Its magnitude is the maximum illuminance difference across the two sides of the surface passing through the point, and the direction from the higher illuminance to the low illuminance vector is the eye.
When the size of the light source is very small compared to its distance from the illuminated surface, the size of the source is negligible at the time of computer and measurement.
For a continuous lamp or luminaire, the total length of the luminescent band is much greater than the distance between it and the illuminance calculation point and can be regarded as a line light source.
The whole piece of luminous surface or luminous ceiling composed of luminaires, whose width and length is greater than the distance between the luminous surface and the illuminated surface, can be regarded as surface light sources.
The light spot used as the origin at the time of measurement and calculation.
The distance between the center lines of adjacent fixtures.
The distance from the bottom of the lamp to the ground.
The ratio of the distance between the fixture and the calculated height of the fixture.
The ratio of the maximum fixture spacing to the fixture's calculated height to ensure the required uniformity of illuminance.
Calculate the average illuminance of the work surface based on the geometry of the room, the number and type of luminaires. The lumen method considers both the direct light flux and the reflected light flux.
Using the luminosity data of the luminaire, calculate the illuminance of each point on the surface.
The installed power of the lamp on the illuminated area.
The ratio of the illuminance on a certain surface of a room to the general lighting illuminance on the work surface.
When using two kinds of light sources for mixed lighting, the ratio of the luminous flux of the former light source to the sum of the luminous flux of the two light sources.
In the imaginary sphere with the center of light of the light source as the center of the sphere, the curve corresponding to the points corresponding to the directions of the light emission intensity is connected, or the plane of the curve is projected.
The curve or curve group that connects the points of equal illumination on the surface.
In the center of a light source or a luminaire, the line connecting the points with the same illuminance on a section in space is called an illuminance curve such as space. The curve is represented by Cartesian coordinates.
The curve or curve group of the point of equal brightness on the connecting surface.
1. Material: Polyester
2. Operating range: - 50ºC - +150ºC
3. Melt Point: 250ºC+-5ºC
4. Flammability: VW-1