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The power selection of the leakage protector is small, causing overload tripping.
Leakage protector, referred to as leakage switch, also known as leakage circuit breaker, is mainly used in the event of leakage failure of equipment and personal electric shock protection with fatal danger, with overload and short circuit protection functions, can be used to protect the overload and short circuit of the line or motor, and can also be used as an infrequent conversion start of the line under normal circumstances.
The selection principle of leakage protector:
1.When purchasing leakage protectors, you should purchase products from manufacturers with production qualifications, and the product quality testing is qualified.
2.The parameters such as power supply voltage, working current, leakage current and action time of the leakage protector should be determined according to the scope of protection, personal equipment safety and environmental requirements.
3.When the power supply adopts leakage protector for hierarchical protection, it should meet the selectivity of the upper and lower switching actions. Generally, the rated leakage current of the upper leakage protector is not less than the rated leakage current of the next level of leakage protector, which can not only sensitively protect the safety of people and equipment, but also avoid skipping trips and reduce the scope of accident inspection.
4.Hand-held power tools (except for Class III), mobile household appliances (except for Class III), other mobile electromechanical equipment, and electrical equipment with a greater risk of electric shock must be installed with leakage protectors.
5.Leakage protectors should be installed on the electrical equipment of construction sites and temporary lines. This is clearly required in the "Technical Code for Temporary Electricity Safety on the Construction Site" (JGJ46-88).
6.Leakage protectors must also be installed in the socket circuits in institutions, schools, enterprises, and residential buildings, as well as in the guest rooms of hotels, restaurants, and guest houses.
7.Power supply lines and equipment installed in water, as well as places with high humidity, high temperature, large metal occupancy coefficient and other good conductivity, such as machining, metallurgy, textile, electronics, food processing and other industries, as well as boiler rooms, pump rooms, canteens, bathrooms, hospitals and other places, must be protected by leakage protectors.
8.For the electrical equipment of the fixed line and the normal production site, the power distribution box with leakage protector should be selected. For small electrical equipment used temporarily, leakage protection plugs (seats) or socket boxes with leakage protectors should be selected.
9.When the leakage protector is used as a supplementary protection to direct contact protection (not as the only direct contact protection), a high-sensitivity, fast-acting leakage protector should be selected.
In general, the action current is not more than 30mA and the action time is not exceeded, which ensures that if the human body is electrocuted, it will not cause the electrocuted person to have pathological physiological danger effects.
In bathrooms, swimming pools and other places, the rated action current of the leakage protector should not exceed 10mA.
In the case that a secondary accident may occur after an electric shock, a leakage protector with a rated operating current of 6mA should be selected.
10.For electrical equipment that is not allowed to be cut off, such as channel lighting, emergency lighting, power supply of fire-fighting equipment, power supply for anti-theft alarm, etc., the alarm leakage protector should be selected to connect the sound and light alarm signals to notify the management personnel to deal with the fault in time.
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If it is an electric water heater, the protector is too small.
In the case of a gas water heater, there may be electricity leakage.
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In the case of electric water heaters, the protector is too small, and you are a little bigger.
It is best to control the water heater separately.
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The electric water heater at home used to be like this, and then a friend taught me how to do it, and it was fine! Now pass on the experience!
1. The water heater may be leakage, and the leakage protector plays a protective role, and the leakage protector will trip protection as long as there is a micro-milliampere leakage.
2. The water heater may have a short circuit, overcurrent and trip.
3. Replace the appropriate protector according to the power of your own water heater, and the current of the general protector is greater than 10% of the water heater.
4. Again, there is the problem of the water heater, only to replace it.
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You can first check whether the reset button on the leakage protector has popped up or see if it has changed color, if so, then you can conclude that it is a trip caused by leakage, if it is a leakage in the line, and it is a zero line leakage, we can judge by unplugging the plug on the water heater socket, and plug the socket into another new appliance that guarantees no problem at all. But for the zero line leakage, we have no other better way to deal with it, the most effective protection measure can be done is to extract the original leakage of the zero line, and then reconnect a good wire; But another situation may also be that there is leakage in the water heater itself, we can also unplug the water heater first, and find a new electrical appliance to plug in.
It is also necessary to note here that if there is leakage in the water heater itself, we should stop using it immediately, and unplug it in time, and do not act rashly and want to repair it ourselves, because we can't deal with the short circuit inside the water heater, and this still has certain safety hazards to avoid the phenomenon of electric shock.
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1. The water heater will automatically trip as soon as it is turned on due to leakage of the water heater: aFocus on testing whether the insulation performance of the heating pipe of the water heater has decreased and whether it has been corroded and perforated; Repair or replace water heater heating pipes.
b.If the cause of the heating pipe of the water heater is ruled out, the thermostat of the water heater should be tested. 2. The leakage protector of the water heater is damaged; Repair or replacement.
3. The water heater leakage protector trips wrongly; Reboot after reset. 4. The heating element and the temperature sensitive switch probe directly conduct heat through the metal, if the heat conduction is too fast and too high, it will produce wrong action. Processing:
Draw the temperature sensitive switch probe from the bottom of the blind tube about 40mm to power off, and turn the multimeter to a resistance level of 20m at the maximum; Then connect the two meter pens with the heating element shell and any of its power supply terminals respectively, and if the cold insulation resistance is greater than 5, the heating element needs to be replaced; 5. The insulation performance of the heating element decreases (generally after a period of use), its insulation resistance value is unstable, and when the leakage current exceeds a certain value, the leakage protection plug will start immediately. Treatment: Check to eliminate or replace the heating element; 6. Leakage between other live components and the casing.
Treatment: Inspection, exclusion or replacement of components; 7. The leakage protection plug has poor contact with the inferior socket, and the misstart occurs due to overheating. Processing:
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1. Short circuit, the water heater is installed in a humid bathroom, which will cause the protector to trip due to a short circuit. 2. Load, it may be a load on the circuit breaker of the water heater, which will also cause the protector of the water heater to trip. 3. The water heater will produce water mist, and the water mist will also cause tripping, and it will trip when the circuit breaker leaks.
If the circuit breaker of the water heater trips the moment it heats up the boiling water, it is caused by a short circuit. Tripping during start-up is caused by overload. Therefore, the total trip reason may be that there are more short-circuit factors in the water heater, and there may be leakage.
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The water heater trips after being plugged in, it may be that the leakage protector is damaged, because once the leakage protector is damaged, it is normal before it is not plugged in, and it trips after plugging in, and the leakage protector needs to be replaced in time if it is damaged, which is also for its own safety.
Circuit and electrical short-circuit, resulting in excessive current: The water heater trips after being plugged in, which may be due to a short circuit in the circuit, or the function is too large and causes the tripping phenomenon.
Whether the power supply is grounded or repeatedly grounded: For example, if the wire is damaged, if it is a neutral line, it is more necessary to pay attention, which is likely to lead to leakage. 80% of such failures are caused by faulty power lines, because the power plug comes with leakage protection, and as long as it leaks, it will trip.
Automatic protection is also possible when the heating tube is ruptured, but it is less likely that the heated tube will rupture. The reason for the failure of the power plug is most likely due to the tripping caused by excessive humidity and water ingress of the plug. As long as the water is dried, or the inside is dried with a hair dryer, it can be used normally.
The water heater is heating normally and suddenly trips.
1. Leakage treatment between other live components and the casing: check and eliminate or replace the components.
2. The leakage protection plug is in poor contact with the inferior socket, and the malfunction is caused by overheating: replace the socket.
3. If either the leakage protection plug of the electric water heater and the temperature sensitive switch fails, the electric water heater trips: replace the temperature sensitive switch or the leakage protection plug.
4. The heating tube and the temperature sensitive switch probe are directly heated by metal, if the heat conduction is too fast and too high, it will produce malfunction treatment: the temperature sensitive switch probe is pumped from the bottom of the blind tube about 40mm high to power off, and the multimeter is turned to a resistance level of 20m at the maximum; Then connect the two meter pens with the heating element shell and any of its power supply terminals respectively, and if the cold insulation resistance is greater than 5, the heating element needs to be replaced;
5. The insulation performance of the heating element decreases (generally after a period of use), the insulation resistance value is unstable, when the leakage current exceeds a certain value, the leakage protection plug will be immediately processed: check to eliminate or replace the heating element.
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The water heater trips as soon as the leakage protector is turned off, which may be caused by one of the following reasons: He Shi is destroyed.
1.Leakage: There may be leakage inside the water heater, causing the current to be lost to the ground through the leakage path, triggering the leakage protector.
Leakage is usually caused by damage to equipment insulation, aging wires, or equipment failure. You can try to confirm whether there is a leakage problem through an inspection by a professional electrician, and repair or replace the faulty parts in time.
2.Leakage protector failure: The leakage protector itself may fail, and the guide Zen preparation will cause it to be triggered by mistake and trip.
A leakage protector is a safety device used to detect whether there is leakage in the equipment and cut off the power supply. However, it can also be affected by external factors (e.g., grid disturbances, overloads, etc.) that can lead to false triggering. If it is suspected that the trip is caused by the failure of the leakage protector, it is recommended to consult a professional electrician for inspection and repair.
3.Circuit fault: The circuit connected to the water heater may have other faults, such as short circuit, overload, etc., which cause the leakage protector to trip.
This can be caused by issues such as damaged wires, overloaded electrical equipment, improper wiring, etc. A professional electrician is required to inspect and resolve circuit faults.
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Under normal circumstances, if the leakage protector of the water heater is working normally, it will automatically trip when detecting leakage to avoid the danger caused by leakage. However, if the water heater is not used for a long time, the leakage protector may have certain problems, such as poor contact or aging, etc., resulting in the protector not working properly.
Therefore, it is recommended that if the water heater is not used for a long time, you can regularly check whether the leakage protector of the water heater is working properly to ensure the safe use of the water heater. In addition, before reusing the water heater, you can also conduct a leakage protection test to confirm that the protector can work properly.
Four reasons. 1. Poor installation of leakage protector If the terminal connection of the leakage protector is not firm during installation, the terminal will heat up and oxidize over time, and the wire insulation layer will be burned out, accompanied by the smell of ignition and rubber and plastic burning, which will cause the circuit to undervoltage and trip the leakage protector. Second, there is a problem with the leakage protector itself. >>>More
The leakage protector of rural families is also called a safety device, because the current buildings in the city are equipped with leakage switches, that is, double P leakage switches. Safety devices are mainly used in rural areas, and they do act as a leakage trip。When the leakage current reaches 30 mA, they will trip automatically >>>More
The differences are as follows:
1. Air switch is our usual familiar name, and its correct name is air circuit breaker. The air circuit breaker is generally low-voltage, that is, the rated working voltage is 1kV. An air circuit breaker is a switchgear with a variety of protection functions that can cut off and turn on the circuit at rated voltage and rated operating current. >>>More
Since the principle of the leakage protector is that the current flowing into the leakage protector and out of the leakage protector is equal, the leakage protector will work normally, and the current flowing into the leakage protector and out of the leakage protector is not equal, and the leakage protector will be powered off.
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