IElectric water heaterVarious electrical protection technologies:
(i) leak protection plugs:
1. Effect: when a water heater fails, the power is automatically cut off before the leak reaches the current that harms the human body。
2. Modus operandi: i. E. The detection of “residual current” in the “geoline” circuit. The plugged wires and the zero wires are inserted simultaneously into a specially designed “zero sequence current sensor” centre hole. When the water heater is powered normally, the currents through the fireline and the zero line are identical and the current sensor's secondary circle is free of voltage output. When “residual currents” are included in the “geoline circuit”, the two power lines that penetrate the sensor are unbalanced, creating a voltage signal at the output end of the “width sensor” proportional to the current. When the voltage signal is large enough, the voltage signal is expanded by the integrated circuit of the pcb, which transforms the controlled silicon that triggers the pcb from the cut-off to the conductor, which connects the circuit to the circuit of the circuit, and removes the main circuit detached device from the jump gate。
(ii) electrical water heaters built up against electrical walls
(a) the principle of working: the firewall is a water-retarded isolation method that, when the water heater works, if the water that is bold inside the heat is electrocuted, it is reduced by the water itself
(1) in the case of nationally marked tap water, electrical currents can be reduced to less than 0. 02 ma/kw after passing through the firewall。
(2) when water quality contains a large quantity of minerals, the conductivity of water is increased, and water heaters are required to use ppr pipes to limit water search pathways to a certain level of electrical resistance。
2. The wall diagram:
3. Some of the electro-thermal water heaters have electric-walled illustrations:
(iii) electromagnetic electro-thermal water heaters:
1. Heating principle: using electric energy to convert magnetic energy to magnetic energy sensor heating, the electromagnetic energy perception should convert the imported energy into thermal energy to complete the heating of the inner gallant water. The exchange current of 50 hz is turned into a direct current through the whole current circuit, and the direct current voltage is converted into a high frequency voltage rate of 20,000 hz via the inner controlled circuit, and the currents converted at the hysteria pass through the loop, causing a hysteria to change the magnetic field. When magnetic field power lines pass thermal conductor, the entire direction produces hundreds of millions of small vortexes in the conductor, thereby impacting and cutting the conductor heat, and ultimately completing the heating of the water。
2. Separability of hydropower: the electromagnetic induction heat is heated by external magnetic field, which is not connected to the inner urchin water and separates hydropower。
(iv) air-energy water heaters:
1. Modus operandi: thermal heat is transmitted to the water tank by cooling by absorbing heat from the air using an electric wind engine。
2. Water tanks for air-heated hydropower heating tubes shall be reliably connected. It is strictly prohibited to connect wires to water tanks and it is possible to divert lightning into them。
(v) no electro-washing technology: water is automatically cut off when it is discharged by absorbing the flow through a sensitive current sensor; and water is turned off for automatic re-heating。
Ii. The installation and use of four specified electrical safety lines:
(b) due to the uneven nature of electrical protection technology in the brand of water heaters, attention should be paid to checking four electrical safety lines prior to installation and taking measures in conjunction with the type of water heater
(i) first security line: leak protection switch
1. Modus operandi: the leak protection switch consists of the main circuit and breaker, the remaining current sensor, the control circuit and the detachment device. In the event of a power failure, the zero-sequencer sub-circle sense is used to generate a voltage, which is expanded by controlling the circuit, driving the detachor action, and two breakers are operated by the chain, while cutting off the main circuit。
Pre-installation of the leak protection switch: a small button (in the red circle of the chart below) at the top of the leak protection switch proves that the leak protection switch is normal when a jump occurs after the button is pressed. If the pressure does not react, the electrician needs to be immediately contacted to replace the leak protection switch
(ii) second safety line: the location of the electro-thermal water plugin line
1. Groundlines: the conductor used to introduce the current into the earth; when electrical equipment fails, the current enters the earth through the line. Landlines and land connections should not be required to be more than four times。
2. Article 3 of the national standard gb2681, in the case of a triangulation, with a zero line on the left, with a surface line on the top and a fire line on the right。
3. The role of the terrestrial line is to protect the security of the person:
(1) the provision of low resistance connections between the ground line equipment and the earth's body, which also reduces the risk of physical electroshock injury
(2) the ground line provides low resistance circuits to the failure of the electrical current to the ground, providing a return source of power, enabling the breaker or breaker to move。
(iii) third safety line: if the water heater's power line is not equipped with a leak protection device, it is proposed to add a leak protection plug, the product being as follows:
(iv) fourth line of defence: if the water heater does not have a built-in firewall, it is proposed that the water heater enters and exits be fitted with an electrical shield and that the waterway be fitted with a ppr pipe; the wall is circled inside and is used to extend the water flow length。
