What to do to remedy the PTC heater after the safety facility is broken
The characteristics and important parameters of the safety tube of the PTC heater. The rated current refers to the larger working voltage that the safety tube can encounter after it is broken. The working voltage encountered on both sides of the fuse is much lower than its rated current in the access era. There are many kinds of fuses. The most common fuse links can be divided into three categories: low-discrimination glass tube fuse, high-discrimination ceramic tube fuse, and polymer material self-recovery fuse made of PPTC plastic polymer. The electric heater does not need the temperature response of the humidity sensor such as professional thermostat and thermal resistance platinum thermal resistance to burn. Its temperature adjustment depends on the characteristics of its original raw materials, so the product is much higher than other products. When using safety tubes, it is generally stipulated that the rated current should exceed the reasonable working voltage of the power circuit. Rated voltage The rated voltage is a large amount of current that occurs during the permanent operation of the safety tube. Assuming that the combined current is Ir, the rated voltage of the fuse tube should be the rejuvenation rate of the different specification fuse tube. The higher the working temperature, the hotter the fuse tube will work, and the shorter the application life will be. The point here is that the gas temperature around the safety pipe should not be confused with room temperature. PTC ceramic heater saves money and has a long application life.
PTC ceramic electric heater is made of high-temperature glued PTC ceramic heating element and corrugated aluminum strip. The water pressure requires the shell to pass the static pressure test in 15.1.3.1 of GB3836.2-2010, the pressure is 1.0 MPa, and the connection time is 10-12 seconds. The enclosure should pass the enclosure pressure test in Clause 15.1 of GB3836.2-2010 and the explosion-proof test in Clause 15.2, and will not permanently deform or damage the refractory function. Dry-cooling experiment The electric heater should hold a dry-cooling experiment, the severity level is +40℃, and it should be connected for 12 days. After the experiment, it should meet the requirements. The contamination level is three. Technical requirements Working voltage: 1140V (660V) Rated power: 25kW Heating medium: Electric ball valve compressed air 4.3.4 When the temperature control system fails, the temperature measured by the intermediate temperature transmitter of the electric heater exceeds 150℃, the control box will automatically Power off. The electric heater has fast thermal response, high temperature control accuracy, and high general thermal compliance. High heating temperature: The electric heater program is very high and the working temperature can reach 850℃. The very tense characteristic of the ptc electric heater is its safety, that is, when the fan cannot stall, the power of the ptc electric heater will automatically drop sharply due to insufficient heat dissipation. At this time, the surface temperature of the electric heater is combined with the Curie temperature (generally 220 ℃), so as to avoid the appearance of "redness" on the surface of the electric heater tube and eliminate the hidden danger of disorder. The affair and benefits of ptc electric heaters.
