Why doesn
2021-08-24
The function of air switch in the circuit is to automatically disconnect the circuit in case of overload, short circuit and voltage loss exceeding the allowable limit, as well as infrequent connection and disconnection of the circuit under normal conditions. The function of the wire shall be able to bear the needs of maximum load current, resist certain mechanical tension, withstand certain voltage, etc.
The problem now is that the wires are burned and the air switch does not trip. The analysis is as follows:
1、 The current carrying capacity of the wire is used incorrectly. The selection of wires shall generally meet the safety, correctness, mechanical tension resistance and other factors. The safe current carrying capacity of the wire shall generally be greater than 1.5 times the rated current of the electric load. Different wires shall be selected according to different device wiring. Such as plastic sheathed wire, plastic cable, single strand, multi strand plastic copper core, aluminum core and other wires. Different wires shall also be selected according to different places. For example, dust, high temperature, humidity, cultural and entertainment places, stages, etc. have different requirements. The selection of wires shall preferably conform to the national standard. The installation of fake and shoddy wires shall be refused. Electrical requirements must be clarified for electrical installation. Only by knowing the maximum rated current of power consumption can we correctly select the wire specifications that meet the requirements.
2、 The rated current of air switch is selected incorrectly. If the wire has burned due to heating and the air switch does not trip, it indicates that the rated current of the air switch is selected incorrectly. The main power switch is on in the line. The rated current of air switch is generally 1.2 times of the total rated current of line electrical appliances. When the line is overloaded, the time-space breaking will delay or even refuse to move. This air switch doesn't work. If the switch is selected too small to withstand large current, it will trip and affect normal use. In addition, the selection of air switch should also pay attention to the adaptability of the place. The adaptability of rated current shall be considered in the selection of air switch. Different air switches are selected for breaking capacity, sensitivity and fast action.
3、 There may be irregularities in the line device. It shall be installed in line with specifications. Comply with electrical and voltage regulations and conduct electrical installation as required. In addition, the inspection and acceptance shall also comply with the low specification requirements to ensure safety.
Source: Cable Network
The problem now is that the wires are burned and the air switch does not trip. The analysis is as follows:
1、 The current carrying capacity of the wire is used incorrectly. The selection of wires shall generally meet the safety, correctness, mechanical tension resistance and other factors. The safe current carrying capacity of the wire shall generally be greater than 1.5 times the rated current of the electric load. Different wires shall be selected according to different device wiring. Such as plastic sheathed wire, plastic cable, single strand, multi strand plastic copper core, aluminum core and other wires. Different wires shall also be selected according to different places. For example, dust, high temperature, humidity, cultural and entertainment places, stages, etc. have different requirements. The selection of wires shall preferably conform to the national standard. The installation of fake and shoddy wires shall be refused. Electrical requirements must be clarified for electrical installation. Only by knowing the maximum rated current of power consumption can we correctly select the wire specifications that meet the requirements.
2、 The rated current of air switch is selected incorrectly. If the wire has burned due to heating and the air switch does not trip, it indicates that the rated current of the air switch is selected incorrectly. The main power switch is on in the line. The rated current of air switch is generally 1.2 times of the total rated current of line electrical appliances. When the line is overloaded, the time-space breaking will delay or even refuse to move. This air switch doesn't work. If the switch is selected too small to withstand large current, it will trip and affect normal use. In addition, the selection of air switch should also pay attention to the adaptability of the place. The adaptability of rated current shall be considered in the selection of air switch. Different air switches are selected for breaking capacity, sensitivity and fast action.
3、 There may be irregularities in the line device. It shall be installed in line with specifications. Comply with electrical and voltage regulations and conduct electrical installation as required. In addition, the inspection and acceptance shall also comply with the low specification requirements to ensure safety.
Source: Cable Network