Power supply: three-phase 380 volts.

Rated power: 7.5kW.

Frequency: 500/580 20 Hz

Startup time: ≤3 seconds

Average sound pressure level (Grade A): 130dB (radius of 5m)

Weight:146kg

Second, the scope of use of air defense warning

For emergency response in various places, the main application scope is as follows:

1, used in war, civil air defense and civil defense alarm systems all over the world;

2. Alarm systems for mines, blasting, prisons, reservoirs, power stations, substations, airports, police stations and military bases.

3, used for earthquake, tsunami, flood, flood control and disaster relief, debris flow, landslide, typhoon, fire, minefield, forest fire prevention and other natural disasters;

4, factories, schools, docks, warehouses, public buildings, commercial areas, residential areas, ports and other places of fire or emergency alarm system;

Third, the performance characteristics of air defense warning

1, special aluminum alloy material, heat treatment, moisture resistance and corrosion resistance;

2, no jamming, no crash, no deformation, etc. , with the function of preventing sandstorms and building nests;

3. Fast start, stable operation, large sound source and strong penetration;

4. The vertical series comes with its own rain hat, and there is no need to match another rain hat;

Fourth, the working principle of air defense alarm

The open wheel is driven by the motor to run at high speed, and the general speed is about 2880r/min. When the motor drives the chime wheel to rotate, air enters the chime wheel from the air inlet on the side, and the sucked air is squeezed out of the window of the fixed wheel at high speed and high pressure at the same time, resulting in crisp sound. The frequency of sound depends on the instantaneous speed of the motor and the number of ventilation holes at the joint between the fixed wheel and the striking wheel.

Five, air defense alarm installation location

The effective coverage of electric alarm is related to many factors:

1. installation height: electric alarms are usually installed 35 to 40 feet above the ground (1 1 to 12 meters). If the alarm is 35 feet below the ground, the sound intensity will increase in the near range, but the effective range of the sound will decrease. On the contrary, if it is 40 feet from the ground, the effective range of sound will increase, but the sound may skip the area near the alarm, and the alarm itself has a relative height. Generally, the range of bottom height ≥ 0.8m ≤ 2.0m is appropriate.

2. Obstacle size: The smaller the obstacle, the farther the effective distance will be, and the larger the obstacle, the opposite.

3. Local noise level: The higher the environmental noise, the shorter the effective distance and the smaller the noise, and vice versa.

4. Wind speed and direction: They usually affect the sound emitted by the alarm, and the prevailing wind direction should also be considered. For example, if the prevailing wind direction is from the west, we can install the alarm on the west-facing edge of the effective range of the alarm.

5. Availability of power supply: ensure the stability of power supply and the convenience of product installation and maintenance.

6. When the alarm is installed at the last selected position, make sure that the air entering is clean.

Therefore, in the location of the alarm, we should comprehensively consider the above factors, test the installation points of the alarm, choose the best position, and ensure the farthest coverage.

Six, air defense alarm processing, installation

Please make sure that the front is facing up and lift the equipment horizontally, and the installation is extremely simple. Install according to the relevant product instructions, and open the service hotline 24 hours a day.

after service

The warranty period is one year from the date of purchase, and it can be replaced for one year (except for man-made damage), and the spare parts fee will be charged for more than one year.

Seven, air defense alarm maintenance

1, clean surface, no dust, no scratches and other undesirable phenomena;

2, the base bolt is firm and reliable, and other fasteners are not loose;

3. The locator is positioned accurately, and there are no mouse nests, bird nests, spider nests and other phenomena in the clock wheel;

4. Use the handle of a screwdriver to toggle the clock wheel, which should be flexible and free from sticking;

5, electricity with any alarm test run is normal, powerful voice;

6. The paint on the surface of the alarm is generally updated once every two years, and self-drying paint with the same color can be sprayed; If the surface paint is in good condition, the time can be appropriately extended. When spraying, special attention should be paid to cleaning the surface of the clock wheel. The paint should not be too thick and controlled within 0.05 mm, otherwise it may cause the clock wheel to get stuck.

After the maintenance is completed and the power supply is running normally, make records, indicate the maintenance personnel, the date of next maintenance, etc., and then submit the records to the archives for management.

Tip: No matter the maintenance of the electric alarm, the power of the alarm must be turned off before operation.

Eight, air defense alarm fault analysis

1, power contact problem

After starting the power supply, there is no response. First, check whether the power supply is normal. Are the power contacts intact?

2. The switch trips automatically

There are three situations at this time:

A. Failure to reach the starting current: If the starting current is not reached, the switch will trip automatically. The starting current with detailed specifications is as follows:

Serial number Motor power (KW) Power supply (V) Starting current (A) Remarks

1 2.2 220/380 32.9

2 4.0 380 57.4

3 7.5 380 105

B jamming phenomenon: when pulling the clock wheel out of the window of the fixed wheel with a screwdriver, it should rotate flexibly without jamming phenomenon. If it fails, the clock wheel and the fixed wheel are stuck (please remove excess dust and paint).

C, motor bearing damage: see if it is tightened. If it is not tightened, it means that the motor bearing is damaged and needs to be replaced.

3. The motor is burnt out

The power supply is normal, but it still won't start. At this time, please open the motor junction box and check whether the motor is burnt out with a multimeter. If it is burned, the surface looks black and smells bad. At this time, confirm that the motor is burnt out and needs to be replaced.

Nine, air defense warning equipment list

1, an alarm (packed in wooden cases).

2. A handbook.

3, a certificate.

4. Controller (optional)

5. Fixed bracket (optional)

warn

1, it is forbidden to operate with your fingers when fiddling with the clock wheel, so as not to cause unnecessary harm;

2. The sound pressure level of the short-distance electric alarm can cause permanent deafness. Therefore, when testing or repairing the alarm, you must wear earmuffs to protect your ears; Make sure that the intake pipe is not blocked. When the test button is pressed, the alarm will send out a continuous single tone signal until the button is released.

3. After the installation, the alarm can work normally. We suggest that all control equipment should be locked to prevent damage.