Precautions for electrical accessories replacement and protective measures
Release time:
2025-04-10 00:00
Source:
Regarding the replacement and protection measures of electrical accessories, the precautions are divided into the following points.
1. In order to effectively suppress the damage of superimposed reverse overvoltage to the equipment, in addition to the installation of resistive protection, nonlinear resistance type overvoltage protector can also be used. This type of protector can quickly reduce its own impedance at the moment of overvoltage occurrence, discharge the overvoltage energy into the ground, and its response speed can reach nanoseconds, and the protection mechanism can be activated in a very short time when the voltage suddenly changes. At the same time, in the system design stage, optimizing the grounding system is also key, by reducing the grounding resistance, the release rate of overvoltage energy can be accelerated, and its impact on the equipment can be reduced.
2. For the power controller that realizes stepless adjustment by phase-shifting trigger, its core advantage is that it can accurately control the output power according to the actual demand of the load. In the field of industrial heating, the traditional on-off power control method will cause large temperature fluctuations and affect product quality, while the phase-shift trigger controller can achieve stable temperature control by smoothly adjusting the voltage. In practical applications, it is necessary to pay attention to the adjustment range and accuracy of the trigger angle, which is usually controlled between 30° and 150°, which can not only ensure the flexibility of power adjustment, but also avoid the current distortion caused by the small trigger angle.
3. Regarding the setting of the rated input voltage from zero to 98%, this is the result of comprehensive consideration of the fluctuation characteristics of the power grid and the safe operation of the equipment. During the normal operation of the power grid, the voltage fluctuation range is generally within ±10%, and the setting upper limit is set to 98%, which reserves a safety margin of 2% for the equipment, which can effectively prevent damage to the equipment due to sudden increase in grid voltage. At the same time, setting the lower limit to zero provides the possibility of voltage control of the equipment under special working conditions such as start-up and failure. For example, in the process of soft start of equipment, the voltage can be gradually increased from low voltage to rated voltage to reduce the impact of starting current on the power grid and equipment. In addition, when the power grid voltage drops abnormally, the equipment can adjust the working status in time according to this setting range, so as to avoid damage or failure to operate normally due to low voltage.
Related News
How to ensure product stability in the selection of raw materials
1. When controlling the moisture of granularity-sensitive raw materials such as calcite white jade, in addition to conventional drying and drying treatment, microwave drying technology can be used to achieve efficient and accurate dehydration. Microwaves can penetrate the inside of the material, causing water molecules to generate high-frequency vibration friction and heat generation, which is 3-5 times more efficient and more evenly distributed than traditional hot air drying. At the same time, the near-infrared spectrometer is used to monitor the moisture content of raw materials in real time, and when the detected value deviates from the set range, the operating parameters of the drying equipment are automatically adjusted to form a closed-loop control system to ensure that the moisture content of raw materials is stable in the process requirement range.
Precautions for electrical accessories replacement and protective measures
Regarding the replacement and protection measures of electrical accessories, the precautions are divided into the following points.
Glass furnace: how to improve the service life of glass electric melting furnace
With the development of industrial technical glass, the life of glass electric melting furnace has also been extended, and the quality of glass has been significantly improved, which is related to the emergence of refractory materials, new species of refractory materials. In particular, it is closely related to the development of fused refractories in the last century. Due to the high density, wear resistance, good high temperature mechanical properties and corrosion resistance of glass electric melting furnace electric refractory material.
High temperature resistance of glass electric melting furnace
The glass processing industry in our country belongs to the unpopular industry, engaged in very few people, but our country's annual demand for glass is indeed the world's first, such a large demand-supply ratio has not led to a large number of practitioners to switch, what is the reason for this? I think it may be for professional glass furnace technology does not understand it. Many people have never been involved in this field, and their technical understanding is not much, so this is the main factor in the current shortage of talents in the glass industry.
Melting process of glass electric melting furnace
The best technology for melting glass is the glass electric melting furnace. With the prospect of government support for the accelerated development of the industry, the use of glass electric melting furnace is recognized by more and more people. But there are also many people who don't know much about it, but they lack professional knowledge, so they often lead to wrong views. Today we will tell you about this glass furnace related knowledge, I hope you can read carefully.
Glass melting furnaces: how to increase the service life of glass electric melting furnaces
With the development of industrial technology glass, the life of glass electric melting furnaces has also been extended, and the quality of glass has been significantly improved. This is related to the emergence of refractories and new species of refractories. In particular, it has a close relationship with the development of electrofused refractories in the last century. Due to its high density, wear resistance, good high-temperature mechanical properties and corrosion resistance of glass electric melting furnaces, electric melting refractories.