Professional Lighting Terms - Luminous flux

Luminous flux The light source radiates to the surrounding space and causes visual energy in a unit time, called luminous flux.

It is expressed in Φ and the unit is lumen (Lm).

The luminous flux is related to the radiation intensity of the light source and also related to the wavelength. The human eye is most sensitive to yellow and green light at a wavelength of 555 nm.

Luminous intensity (light intensity)

The luminous flux emitted by a light source within a unit of solid angle in a particular direction is called the luminous intensity of the light source in this direction, and is simply called the light intensity. With the symbol I, the unit candela (Cd) is a light source that radiates light flux uniformly in all directions.

I=Φ/W

The total luminous flux radiated from the Φ-light source in the W solid angle. (Lm)

Solid angle (Sr) of the luminous range of the W-light source

The solid angle is a conical angle, measured in terms of spherical surface, in spherical degrees (Sr)

S=2Ï€r squared (1-COS&theta W=S/r squared=2Ï€(1-COS&theta)

Cover Of Cable Tray

Cover of Cable Tray
Cable trays are an essential part of any electrical system that requires the management of cables and wires. They are used to protect and organize cables and wires, and to ensure that they are not damaged or exposed to any external factors that could cause harm. Cable trays are available in various types, sizes, and materials, and they come with different accessories and components that enhance their functionality. One of the essential components of a cable tray is the cover, which is used to protect the cables and wires from dust, debris, and other environmental factors.
A cover of a cable tray is a flat or curved panel that is used to protect the cables and wires that are placed inside the tray. It is made of various materials, including steel, aluminum, fiberglass, and plastic, and it is available in different sizes and shapes to fit different types of cable trays. The cover is attached to the tray using different methods, such as clips, bolts, or screws, and it can be easily removed for maintenance or repair purposes.
The main purpose of a cover of a cable tray is to protect the cables and wires from external factors that could cause damage or interfere with their performance. The cover prevents dust, debris, and other environmental factors from entering the tray and damaging the cables. It also protects the cables from accidental damage caused by people or equipment, and it prevents unauthorized access to the cables, which could lead to safety hazards or security breaches.
In addition to its protective function, a cover of a cable tray also enhances the aesthetic appeal of the electrical system. It gives the system a neat and organized appearance, and it conceals the cables and wires from view, which can be particularly useful in public areas or spaces where aesthetics are important.
There are different types of covers that can be used with cable trays, depending on the specific requirements of the electrical system. For example, solid covers are used to provide complete protection to the cables and wires, while perforated covers are used to allow air circulation and prevent the buildup of heat. Ventilated covers are used to provide a higher level of air circulation, which is particularly useful in areas where there is a risk of overheating or where the cables generate a lot of heat.
In conclusion, a cover of a cable tray is an essential component of any electrical system that requires the management of cables and wires. It provides protection to the cables and wires, enhances the aesthetic appeal of the system, and ensures that the system operates safely and efficiently. Cable tray covers are available in different types, sizes, and materials, and they can be customized to meet the specific requirements of the electrical system.

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