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Alpine Metal electrical components are tools that can accurately determine and measure temperature, divided into dial thermometers and digital thermometers. Depending on the temperature-sensing substance used and the temperature range, there are kerosene thermometers, alcohol thermometers, mercury thermometers, gas thermometers, resistance thermometers, thermocouple thermometers, radiation thermometers and optical thermometers, bimetallic thermometers, etc. Digital thermometers can accurately determine and measure temperature, displaying it numerically rather than with a pointer or mercury. Hence they are called digital thermometers or digital temperature gauges.

Alpine Metal electrical component structure

The simplest switch has two metal pieces called "contacts"; when the two contacts touch, they complete the current circuit, and when they do not touch, the current path is open. When selecting contact metals, their corrosion resistance must be considered, because most metals form insulating oxides after oxidation, preventing the contacts from functioning properly. Selection of contact metals also requires consideration of electrical conductivity, hardness, mechanical strength, cost, and toxicity. Contacts are sometimes plated with corrosion-resistant metals. Plating is generally applied to the contact surfaces to avoid performance degradation due to oxides. Sometimes non-metallic conductive materials, such as conductive plastics, are used for the contact surfaces. In addition to contacts, switches have moving parts that make or break the contact; switches can be classified as toggle switches, pushbutton switches, rocker switches, etc., based on the type of moving part, and the moving part can also be other types of mechanical linkages.

Alpine Metal electrical component principle

The thermistor will remain in a non-tripped state for a long time; when the ambient temperature and current are in the c region, the heat dissipation power of the thermistor is close to its heat generation power, so it may or may not trip. For a thermistor at the same ambient temperature, the trip time decreases sharply as the current increases; a thermistor at a relatively higher ambient temperature has a shorter trip time and lower holding current and trip current. The PTC effect is a material property known as the PTC effect, i.e., the positive temperature coefficient effect, which means that the resistance of this material increases with rising temperature. For example, most metallic materials exhibit the PTC effect. In these materials, the PTC effect manifests as a linear increase in resistance with temperature, which is commonly referred to as the linear PTC effect. Nonlinear PTC effect: Materials undergoing a phase transition exhibit a phenomenon where resistance increases abruptly by several to more than ten orders of magnitude over a narrow temperature range, i.e., the nonlinear PTC effect. Many types of conductive polymers exhibit this effect, such as polymer PTC thermistors. These conductive polymers are very useful for manufacturing overcurrent protection devices. Polymer PTC thermistors are used for overcurrent protection; polymer PTC thermistors are often referred to as resettable fuses (hereinafter referred to as thermistors). Due to their unique positive temperature coefficient resistance characteristics, they are highly suitable as overcurrent protection devices. Thermistors are used in series in circuits, just like ordinary fuses. When the circuit is operating normally, the thermistor temperature is close to room temperature and its resistance is very low, so it does not hinder current flow when connected in series; however, when an overcurrent occurs due to a fault, the thermistor's temperature rises due to increased heat generation. When the temperature exceeds the switching temperature, the resistance increases dramatically instantly, and the current in the circuit rapidly drops to a safe value. After the thermistor trips, the current in the circuit is significantly reduced; t is the trip time of the thermistor. Because polymer PTC thermistors have good design flexibility, their sensitivity to temperature can be adjusted by changing their switching temperature (ts), allowing them to provide both overtemperature and overcurrent protection simultaneously. They are suitable for overcurrent and overtemperature protection of lithium-ion and nickel-metal hydride batteries. Influence of ambient temperature on polymer PTC thermistors: Polymer PTC thermistors are directly heated, step-type thermistors. Their resistance change process is related to their own heat generation and dissipation conditions, so their holding current, trip current, and trip time are affected by ambient temperature.

Alpine Metal electrical component structure

The structure of a power cord is not overly complex, but it cannot be fully understood at a glance. A thorough study reveals that certain aspects require professional knowledge to comprehend the structure of a power cord. The main components of a power cord are the outer sheath, inner sheath, and conductor. Common conductive materials include metal wires such as copper and aluminum. ① The outer sheath, also known as the protective sheath, is the outermost layer of the power cord. This layer serves to protect the power cord and possesses robust characteristics, such as high-temperature resistance, low-temperature resistance, resistance to natural light interference, good flexibility, long service life, and environmentally friendly materials. ② The inner sheath, also known as the insulating sheath, is an essential intermediate component of the power cord. As the name suggests, its primary function is insulation, ensuring electrical safety by preventing any leakage between the copper wires and the air. The material of the insulating sheath must be soft to ensure it fits well within the intermediate layer. ③ Copper wire is the core component of the power cord, serving as the carrier for current and voltage. The density of the copper wire directly affects the quality of the power cord. The material of the power cord is also a critical factor in quality control, with the quantity and flexibility of the copper wires being additional considerations. ④ The inner sheath is a layer of material wrapped between the shielding layer and the wire core, typically made of polyvinyl chloride (PVC) or polyethylene (PE) plastic. Low-smoke zero-halogen materials are also used. Used in accordance with process specifications, it prevents the insulation layer from coming into contact with water, air, or other objects, thereby avoiding moisture absorption and mechanical damage to the insulation layer.

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