When the street light is in use, the current is high, so why does it take an hour or two for the fus

Introduction When the street light is in use, the current is high, so why does it take an hour or two for the fuse to trip in the event of a breakdown? THANKS. When the street light is used, the current is high and it takes an hour or two for the fuse to trip due to l

When the street light is in use, the current is high, so why does it take an hour or two for the fus

When the street light is used, the current is large and it takes an hour or two for the leakage fuse to trip. The reasons may be as follows:

1. the leakage fuse is larger: the leakage fuse is a kind of use. A device used to protect a circuit. When the current in the circuit exceeds the rated current of the leakage breaker, the leakage breaker automatically trips and breaks the circuit. If the current rating of the leakage fuse is higher, the current in the circuit must reach a higher value to cause the leakage fuse to trip.

2. There is a short-term overload current in the street light circuit: When the street light starts, due to the low resistance of the bulb, a short-term overload current appears in the circuit. . Indeed, the resistance of the bulb is low when it is cold and the current is high at start-up.As the temperature of the bulb increases, the resistance gradually increases and the current gradually decreases. If the current rating of the leakage fuse is large, this brief overload current may not be enough to cause the leakage fuse to trip.

3. The operating characteristics of leakage protection: The operating characteristics of leakage protection mean that the leakage protection will not trip until the current exceeds the rated current for a certain period of time. Generally speaking, the longer the leakage protection action time, the higher the rated current. If the leakage fuse operates for a long time, the current in the circuit must continue for some time before the leakage fuse trips.

4. There are other loads in the street lighting circuit: in addition to flash bulbspublic age, there may be other loads connected to the street lighting circuit, such as motors, heaters, etc. The starting current of these loads is relatively large, which may cause the total current in the circuit to exceed the current rating of the leakage protection. If the current rating of the leakage fuse is higher, the starting current of these loads may not be sufficient to trip the leakage fuse.

To summarize, when the street light is used, the current is large, and the reason why it takes one or two hours for the leakage breaker to trip may be due to the rated current of the leakage breaker . is relatively large and there is a short-term overload current in the street light circuit, which causes the leakage circuit breaker to trip. The operating characteristics are longer or there are other loads in the lighting circuitpublic air conditioning. In order to ensure the safe operation of the circuit, it is recommended to regularly check whether the rated current of the leakage protection meets the actual needs of the street lighting circuit, and select the appropriate leakage protection according to the actual situation. .

Can be popularized,

1. Due to the good physical properties of optical fiber, the development and industrial application of professional optical fiber is growing, and it can also be efficient. prevent network congestion Loss of data packets, advertising display, ships, etc., and the ability to transmit images occupy valuable network resources;

2. This not only reduces the possibility of data conflicts, but also ensures the reliability of data transmission. Non-networked transceivers, a pair of optical fibers as thin as fibere spider can carry 10 billion phone calls at the same time, and fiber optic sensors have significantly improved the reliability of high-temperature systems to better meet the needs of building access networks. .

Basic description:

1. The main purpose of the reflector is to increase the intensity of the light, while the color filter can change the color and create different effects. Massive luminescence means that the optical fiber itself is the luminous body and will form a flexible light strip;

2. Most optical fibers used in the field of lighting are plastic optical fibers. Among different optical fiber materials, plastic optical fiber is the cheapest to manufacture, and compared with quartz optical fiber, the production cost is often only one tenth. Due to the characteristics of the plastic material itself, it constitutes thebest choice among all fiber optic materials, whether in terms of post-processing or variability of the product itself.

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