Most of the public buildings in China use traditional lighting control methods. With the advancement of science and technology and the development of advanced national technology, the introduction of foreign technology such as the building word control (BAS) system and the intelligent lighting control system have been developed. However, the initial investment cost is relatively high, and the maintenance is difficult in the later stage. The actual operation effect is not good. Even the investment does not use the automation that should be used for intelligent lighting, resulting in a great waste and lowering the investment expectations of the owners. Then, is there a simple way to control the construction of a building with a general scale of demand?
This article describes a rail-type time switch "KG316T" on the market, which is a general-purpose timer time controller. Based on the fact that the time controller is simple to use in public place lighting control, and the control is convenient, it is listed in the engineering practice.
1. System composition and application fields
The system consists mainly of time switches as simple peripheral components to meet actual engineering needs. The "KG316T" core unit is a microcomputer time control switch for the microcontroller chip. The time control switch is a power switch control device which is composed of a single-chip microprocessor as a core and an electronic circuit, and can open and close the control circuit in a day or week cycle and for a plurality of periods. The time is set to any time period, and multiple groups can be set every day, and there are multiple control functions, and the illuminance control function of the advanced product. One setting is valid for a long time.
The output current can be 10-25A, and it can be extended to control other high-power power equipment through relays, contactors and the like. The “KGT36T†universal time control switch is more common in the market, which can set the working time on site or automatically control according to the design logic. That is to form a small distributed automatic control system. One of the wirings of "KG316T" is shown in Figure 1.
2, system design
2.1 Public Lighting Design Application Examples
Public areas generally refer to public places, public walkways, unattended computer rooms, halls, etc., where there are few administrative personnel. According to the engineering design requirements, there is usually an independent power supply and distribution system. For example, lighting distribution boxes in public areas are responsible for power supply control for this layer or this fire zone. Then we control the lighting in the area according to this principle. The traditional panel switches are scattered and the quantity is huge, which brings great trouble to the managers. An underground garage with an area of ​​10,000 square meters is a disaster. The intelligent design aims to liberate manpower and meet the needs of people for automation. To find a simple and reliable public area lighting control system for this purpose.
Such as the more common office buildings. According to the timeliness and regularity of office activities, automatic time-sharing control is implemented for public walkway lighting. (1) During the general cleaning period, the lamp is manually controlled during the general cleaning period, and it is temporarily or slightly opened according to the need; (2) Only a part of the day is turned on every day to meet the minimum use requirement. (3) Office hours can be divided into the afternoon paragraph in the morning. When the sun is full, the control mode is completely extinguished, and the rest of the time is closed. (4) Only one way during the off-hours, and the security patrol in the late-night phase can be fixed to set a certain time.
Another example is the lighting control analysis in the garage: according to the regularity of the garage owner's commute time, the morning and night peak hours are set to design, such as 8 to 10 o'clock, all the lane lights and parking lights, and the night drive into the lane. Lamps and junctions guide lamps are turned on during the day to turn off during the day, and parking spaces can be opened at night to meet the lower demand.
2.2 Design points of the time control system
Both manual and automatic modes of operation are considered when designing in the event of a controller failure. You can manually turn any lighting on or off manually. The lighting time control switch time program can be set at the factory time of the distribution box, or adjusted to the time period required by the time control logic and calibrated according to the field. The lighting device is controlled by a time-scheduled program so that each lighting device operates at a prescribed time. According to the requirements of the interior design for the lighting scene, the lighting circuit is divided into the loops required by the lighting scene.
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