Standards, regulations and suggestions for aviation obstacle lights

First, the location and scope of aviation obstacle lights.

The Civil Aviation Law of People's Republic of China (PRC) and relevant national documents clearly stipulate the setting of obstacle lights:

1. Buildings and structures with limited or ultra-high airport clearance protection shall be equipped with aviation obstacle lights and signs.

2, artificial and natural obstacles affecting flight safety on the route and around the flight area, aviation obstacle lights and signs should be set up.

3, may affect the flight safety of high-rise buildings and ground facilities, should set up aviation obstacle lights and signs and keep it in normal condition.

★ Public security, fire protection, transportation and other departments have built helipads in the city, which is considered as the clearance over the city. Tall buildings and structures in the city should be equipped with aviation obstacle lights and signs.

Second, the relevant standards, regulations and suggestions of aviation obstacle lights

Technical standard for civil airport flight area (MH50 13-20 14), annex XIV of international airport standards and construction measures issued by ICAO, and China civil aviation industry standard aviation obstacle light (MH/T60 12- 1999). Obstacle lights have the following provisions:

Aviation obstacle lights set for obstacles must be flashing, so that they can be clearly distinguished from the ground constant light source in the air and reach the specified sight distance.

(A) the classification of aviation obstacle lights

According to Annex XIV of International Standards and Recommended Practices Airports issued by ICAO (MH/T60 12 1999), obstacle lights can be divided into three categories: low intensity, medium intensity and high intensity:

1, the low light intensity obstacle lamp is constant light, red, and the peak light intensity is greater than 32.5cd. Generally, it is not used alone, and it must be used with medium light intensity and high light intensity obstacle lamps. For example, buildings and facilities over 45 meters are provided with multiple layers of medium-intensity or high-intensity obstacle lights, and low-intensity obstacle lights can be arranged between the medium-intensity or high-intensity obstacle lights. (The low light barrier light is red, and the effective light intensity is 100 CD 25%)

2. According to the lighting requirements, medium-intensity obstacle lights can be divided into three types:

A. Medium-intensity A-type obstacle lamp is a white flash lamp with an effective light intensity of 20000 CD-2000 CD, which is used for buildings and facilities over 105 meters and obstacles with strong background light, or used in conjunction with high-intensity B-type lamp dimming.

B. The medium-intensity B-type obstacle light is a red flash with an effective light intensity of 2000 CD 25%.

C, medium light intensity C aviation obstacle light is red constant light, and the effective light intensity is 2000 CD 25%.

3. High-intensity obstacle lamps can be divided into two types according to lighting requirements:

A. The high-intensity A-type obstacle lamp is a white flash, which flashes with variable light intensity at daytime, dusk or dawn and night, and the effective light intensity at daytime is 200,000 CD 25% respectively; 20000 CD at dusk or dawn 25%; 25% at night in 2000 CD; It is mainly used for buildings and facilities above150m, or used with medium-intensity obstacle lights.

B, the high-intensity B-type obstacle lamp is a white flash, which flashes synchronously at three levels of all-weather variable light intensity during the day, dusk or dawn and night, and the effective light intensity is100000 CD 25%; % at days; 20000 CD at dusk or dawn 25%; 2000 CD 25% at night, mainly used to mark wires, cable towers and high-voltage transmission line towers.

Three. Installation and distribution of aviation obstacle lights

1. The setting of obstacle lights shall indicate the highest point and the most edge of obstacles (i.e. apparent height and apparent width).

2. If the top of an object is more than 45 meters above the ground around it, it is necessary to add obstacle lights in the middle layer, and the distance between the middle layers shall not be allowed.

More than 45 meters and as equal as possible (especially for super-high-rise buildings above 100 meters in the city, it is necessary to add obstacle lights in the middle floor). Located in the city and at home

When installing intermediate barrier lights in buildings near residential areas, consideration should be given to avoiding making residents feel unhappy. It is generally required that only escaping light can be seen from the ground.

3. Obstacle lights of buildings with wide shapes should be able to see the outline of objects from all aspects. In the horizontal direction, you can also refer to setting obstacle lights every 45 meters or so.

4. For ultra-high objects, facilities, cable towers and roof towers with a height of105m, medium-intensity A-type obstacle lights should be set at the top, with white flashing lights, and red medium-intensity B-type obstacle lights should be set at the lower part in layers.

5. Ultra-high objects (such as radio and television towers and long-span cable-stayed bridges). ) If the height is higher than150m, a high-intensity A-type obstacle lamp shall be installed at the top of it, and it shall be used together with the medium-high intensity obstacle lamp.

6. Ultra-high voltage transmission line towers should be equipped with high-intensity B-type obstacle lights, which should flash synchronously for three layers. Located at the top of the tower, the lowest point of cable sag and the middle position between them, and outside the tower along the cable routing direction.

7. For chimneys or other similar buildings, the top obstacle light must be located between 1.5-3 meters at the top. Considering the pollution of chimney to lamps and lanterns, the obstacle lamp can be installed 4-6 meters below the chimney mouth (see the extract of national standard for details).

8. No matter what kind of obstacle lights, the number and arrangement of obstacle lights with different heights should be able to see the outline of objects or groups of objects from all directions, and the synchronous flashing of obstacle lights should be considered to achieve obvious warning effect.

Four, generally can refer to the following obstacle light setting method.

Obstacle lights installed on huge buildings should be able to see the outline of objects from all directions. Horizontal direction can also refer to the installation of obstacle lights every 45 meters or so. General buildings should be equipped with obstacle lights at the top, which are higher than150m, and high-intensity A-type obstacle lights should be installed at the top, which should be used in conjunction with medium-intensity obstacle lights. For tall objects higher than 105 m but lower than 150 m, type A obstacle lights with medium intensity should be set at the top, and obstacle lights should be added in the middle layer with equal spacing as far as possible.

Ultra-high voltage transmission line towers should be equipped with high-intensity B-type obstacle lights, and three layers should flash synchronously. The location is the top of the tower, the lowest point of the cable sag line, and both.

LED light source has established its position as the best light source for aviation obstacle lights with its advantages of high efficiency, environmental protection, energy saving and stability.

Schematic diagram of landing installation of AC multi-control flashing obstacle light. Please refer to the schematic data:

People's Republic of China (PRC) national standard GB5005 1-200 1 stipulates the distribution and signs of aviation obstacle lights in chimneys.

Wiring method of aviation obstacle light (general)

The auxiliary lamp has no optical switch, and can only work under the control of the synchronous signal of the main lamp or the controller, and cannot work alone.

Note: the lamps should be installed at a distance of more than 2 meters from the transmitting antenna, and avoid the strong radiation area as far as possible, so as not to affect the normal work and communication of the lamps. The base station with transmission power above 500W should be more than 3 meters away from the antenna; Also pay attention to avoid installation at the top and edge of the tower to avoid lightning strike.

According to the Law of the People's Republic of China on the Safety of Special Equipment and the latest documents of the Civil Aviation Administration, aviation obstacle lights, as special equipment, must have a qualified test report issued by the testing center designated by the Airport Department of the Civil Aviation Administration.