What is the maximum voltage of Avalon miner
Publish: 2021-05-13 15:32:19
1.
3.5.11 of "coal mine safety regulations" stipulates that the distribution voltage at all levels of coal mine electricity and the rated voltage level of various electrical equipment shall meet the following requirements: the high voltage shall not exceed 10000 V; Low voltage not exceeding 1140 V; The rated power supply voltage of lighting, signal, telephone and hand-held electrical equipment shall not exceed 127 V; The rated voltage of remote control line shall not exceed 36 v; When 3300v power supply is used for electrical equipment in mining area, special safety measures must be formulated
extended data
the voltage grade of coal mine power supply in China is 35kV - the voltage of coal mine ground substation; 10kV or 6kV - underground power supply and distribution voltage; 3KV or 1140V - power supply voltage of fully mechanized working face and high-grade common working face; 660V - power supply voltage of mechanized mining face and excavation
380V - distribution voltage of low voltage power grid on the ground and underground of small tramcar; 220 V - lighting voltage of ground, shaft bottom yard and main air inlet roadway; 127V - power supply voltage of hand-held electric tools, lighting, signal and telephone; 36V - limit voltage of control electrical equipment; DC 250V, 550V - DC trolley power supply voltage
2. You go to the official website of Avalon mining machine
3. I don't know if you are asking artificial voltage or all natural voltage. Generally, the highest artificial voltage of human on the transmission line is about 100kV, that is 100000 v. If it is natural, such as lightning, the instantaneous voltage can reach tens of millions of volts!
4. Unknown_Error
5. When the static voltage reaches 2000 V, the fingers will feel it. When the static voltage exceeds 3000 V, there will be sparks on the fingers, and there will be acupuncture like pain. When the static voltage exceeds 7000 V, people will feel electric shock.
in daily life, the static voltage can sometimes be as high as tens of thousands of V. however, e to the extremely short time of electricity generated by friction, the amount of current generated is very small, so it will not cause life-threatening to human body
in daily life, the static voltage can sometimes be as high as tens of thousands of V. however, e to the extremely short time of electricity generated by friction, the amount of current generated is very small, so it will not cause life-threatening to human body
6. At present, the maximum voltage of commercial AC power supply in China is 750 kV (used in Northwest China), and the maximum voltage of DC power supply is 500 kV (used in East China and South China by Three Gorges Hydropower Plant). The future 1000 kV national power grid has been planned
7. The normal lithium battery cell is 3.7V, the full voltage is 4.2V, the nominal voltage after series connection is only 7.4v, 11.1v, 14.8V... The corresponding full voltage (that is, no-load output voltage of charger) is 8.4v, 12.6V, 16.8v... It can't be an integer of 12V, just like every 2V of lead-acid battery, the full voltage is 2.4V, the corresponding only nominal 6V, 12V, 24 V... The full charge voltage (also the output voltage of the charger) is 7.2 V, 14.4 V, 28.8 V respectively... What kind of lithium battery are you?
8. There are various types of batteries with different voltages
dry battery is 1.5 ∨
button battery is 1.2V, 3 ∨
stack battery is 9V
Rechargeable battery is 3.7V
battery is 4 ∨, 6V, 12V.
dry battery is 1.5 ∨
button battery is 1.2V, 3 ∨
stack battery is 9V
Rechargeable battery is 3.7V
battery is 4 ∨, 6V, 12V.
9. Why is 36 V defined as the limit of safe voltage? It turns out that when the human body passes the current of less than 5 mA, it only proces the feeling of "hemp electricity", and there is no danger. The dry skin resistance is generally more than 10000 ohm, and the current through the human body is less than 5 Ma under 36 v. Therefore, generally speaking, 36 V voltage is safe for human body
however, it should be noted that the safe voltage should be less than 36 V in humid environment. Because in this environment, the resistance of human skin becomes smaller, and the voltage applied between two parts of the human body is dangerous even if it is 36 v. Therefore, it is safe to use a lower voltage of 24 V or 12 V at this time<
the instry stipulates that the safe voltage is 36V and the safe current is 10mA. The reasons are as follows:
the harm degree of electric shock to human body mainly depends on the size of current passing through human body and the ration of power on. The greater the current intensity is, the greater the fatal risk is; The longer the ration, the greater the probability of death. The minimum current that can cause people to feel is called sensing current, which is 1mA for AC and 5mA for DC; The maximum current that a person can get rid of after electric shock is called escape current, which is 10mA for AC and 50mA for DC; The life-threatening current in a short time is called lethal current. If the current of 100 Ma passes through the human body for 1 s, it can be fatal, so the lethal current is 50 ma. In the case of electric shock protection device, the current allowed by human body can be considered as 30mA<
human body's response to electric current:
8 ~ 10mA hand is difficult to get rid of the electrode, and has severe pain (finger joint).
20 ~ 25mA hand is paralyzed rapidly, and can't get rid of the electrode automatically, so it's difficult to breathe.
50 ~ 80mA hand is difficult to breathe, and the atrium begins to vibrate.
90 ~ 100mA hand is paralyzed by breathing, and the heart begins to paralyze three seconds later, Stop beating.
according to Ohm's Law (I = u / R), we can know that the current flowing through the human body is related to the applied voltage and human resistance. In addition to the resistance of human body, the resistance of clothes, shoes and trousers should also be added, although the resistance of human body can reach 5000 Ω， However, there are many factors that affect the resistance of human body, such as wet skin, sweating, conctive st, increasing the contact area and pressure with charged body, as well as wet and greasy clothes, shoes and socks, which can rece the resistance of human body. Therefore, the current flowing through human body can not be calculated in advance. Therefore, in order to determine the safety conditions, the safety current is often not used, but the safety voltage is used for estimation: generally, in the dry environment with high risk of electric shock, the safety voltage is specified as 36V, and in the humid environment with high risk of electric shock (such as welding and maintenance in metal containers and pipelines), the safety voltage is specified as 12V, The current passing through the human body ring electric shock can be limited in a small range, which can ensure personal safety to a certain extent
"only the voltage not higher than 36 volts is safe" should be understood as: under normal circumstances, only the voltage applied between different parts of the human body is not higher than 36 volts is safe.
however, it should be noted that the safe voltage should be less than 36 V in humid environment. Because in this environment, the resistance of human skin becomes smaller, and the voltage applied between two parts of the human body is dangerous even if it is 36 v. Therefore, it is safe to use a lower voltage of 24 V or 12 V at this time<
the instry stipulates that the safe voltage is 36V and the safe current is 10mA. The reasons are as follows:
the harm degree of electric shock to human body mainly depends on the size of current passing through human body and the ration of power on. The greater the current intensity is, the greater the fatal risk is; The longer the ration, the greater the probability of death. The minimum current that can cause people to feel is called sensing current, which is 1mA for AC and 5mA for DC; The maximum current that a person can get rid of after electric shock is called escape current, which is 10mA for AC and 50mA for DC; The life-threatening current in a short time is called lethal current. If the current of 100 Ma passes through the human body for 1 s, it can be fatal, so the lethal current is 50 ma. In the case of electric shock protection device, the current allowed by human body can be considered as 30mA<
human body's response to electric current:
8 ~ 10mA hand is difficult to get rid of the electrode, and has severe pain (finger joint).
20 ~ 25mA hand is paralyzed rapidly, and can't get rid of the electrode automatically, so it's difficult to breathe.
50 ~ 80mA hand is difficult to breathe, and the atrium begins to vibrate.
90 ~ 100mA hand is paralyzed by breathing, and the heart begins to paralyze three seconds later, Stop beating.
according to Ohm's Law (I = u / R), we can know that the current flowing through the human body is related to the applied voltage and human resistance. In addition to the resistance of human body, the resistance of clothes, shoes and trousers should also be added, although the resistance of human body can reach 5000 Ω， However, there are many factors that affect the resistance of human body, such as wet skin, sweating, conctive st, increasing the contact area and pressure with charged body, as well as wet and greasy clothes, shoes and socks, which can rece the resistance of human body. Therefore, the current flowing through human body can not be calculated in advance. Therefore, in order to determine the safety conditions, the safety current is often not used, but the safety voltage is used for estimation: generally, in the dry environment with high risk of electric shock, the safety voltage is specified as 36V, and in the humid environment with high risk of electric shock (such as welding and maintenance in metal containers and pipelines), the safety voltage is specified as 12V, The current passing through the human body ring electric shock can be limited in a small range, which can ensure personal safety to a certain extent
"only the voltage not higher than 36 volts is safe" should be understood as: under normal circumstances, only the voltage applied between different parts of the human body is not higher than 36 volts is safe.
10. The single bead voltage is not less than 1.8V. According to their own series and parallel to see a. If it is connected to the lighting circuit, the voltage should be 220 v. Connect the power supply and measure the voltage with a multimeter.
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