ENNA GmbH electrical components Germany ENNA GmbH models ENNA GmbH prices

ENNA GmbH electrical components are resistive elements with three terminals, whose resistance can be adjusted according to a specific variation pattern. A potentiometer typically consists of a resistive element and a movable wiper. When the wiper moves along the resistive element, a resistance value or voltage proportional to the displacement is obtained at the output terminal. Potentiometers can be used as three-terminal components or as two-terminal components. The latter can be regarded as a variable resistor; since its function in a circuit is to obtain an output voltage that has a certain relationship with the input voltage (applied voltage), it is called a potentiometer. A potentiometer is a type of variable resistor. It usually consists of a resistive element and a rotating or sliding system, i.e., a moving contact moves on the resistive element to obtain a partial voltage output. The function of a potentiometer is to adjust voltage (including DC voltage and signal voltage) and current magnitude. Structural features of potentiometers: The resistive element of a potentiometer has two fixed terminals. By manually adjusting the shaft or slider, the position of the moving contact on the resistive element is changed, thereby changing the resistance between the moving contact and either fixed terminal, which in turn changes the voltage and current magnitude. A potentiometer is an adjustable electronic component. It consists of a resistive element and a rotating or sliding system. When a voltage is applied across the two fixed contacts of the resistive element, rotating or sliding the system changes the position of the contact on the resistive element, allowing a voltage proportional to the position of the moving contact to be obtained between the moving contact and the fixed contact. It is mostly used as a voltage divider, in which case the potentiometer is a four-terminal component. A potentiometer is essentially a sliding rheostat, available in several styles, generally used for volume control in speakers and power adjustment for laser heads. A potentiometer is an adjustable electronic component. It is a variable resistor used for voltage division. One or two movable metal contacts are pressed tightly against the exposed resistive element. The contact position determines the resistance between either end of the resistive element and the contact. Classified by material: wire-wound, carbon film, and solid-core potentiometers. Classified by the relationship between output-to-input voltage ratio and rotation angle: linear potentiometers (linear relationship) and functional potentiometers (curvilinear relationship). Main parameters include resistance, tolerance, and rated power. Widely used in electronic equipment, such as for volume control in audio systems and receivers.

ENNA GmbH electrical components applications

Specialized solid-state relays can feature short-circuit protection, overload protection, and overheat protection. When combined with hardwired combinational logic encapsulation, they can realize intelligent modules required by users, suitable for direct use in control systems. Solid-state relays are widely used in computer peripheral interface equipment, constant temperature systems, temperature regulation, electric furnace heating control, motor control, CNC machinery, remote control systems, and industrial automation devices; signal lights, dimming, flashers, stage lighting control systems; instruments, medical devices, copiers, automatic washing machines; automatic fire fighting, security systems, and as switching switches for power capacitors for grid power factor compensation, etc. Additionally, they are extensively used in chemical, coal mining, and other environments requiring explosion-proof, moisture-proof, and corrosion-resistant characteristics.

ENNA GmbH electrical components advantages

Components do not consume material; no matter how excellent a vacuum tube is, it will gradually deteriorate due to changes in cathode atoms and chronic air leakage. Due to technical reasons, transistors faced similar issues in their early manufacturing stages. They consume very little electrical energy, only one-tenth to one-hundredth of that of vacuum tubes. Unlike vacuum tubes, they do not require heating a filament to generate free electrons. A transistor radio can operate for six months to a year on just a few dry cells, which is difficult to achieve with vacuum tube radios. No preheating is required; they work immediately upon startup. For example, a transistor radio produces sound instantly when turned on, and a transistor television displays images quickly. Vacuum tube equipment cannot achieve this; after turning on, one must wait a while before hearing sound or seeing images. Clearly, transistors have significant advantages in military, measurement, and recording applications. They are robust and reliable, resistant to shock and vibration, qualities unmatched by vacuum tubes. Additionally, the volume of a transistor is only one-tenth to one-hundredth that of a vacuum tube, and it generates very little heat, making it suitable for designing small, complex, and reliable circuits. Although transistor manufacturing processes are precise, the steps are simple, facilitating higher component installation density.

ENNA GmbH electrical components principles

A circuit breaker generally consists of a contact system, arc extinguishing system, operating mechanism, trip unit, and housing. During a short circuit, the magnetic field generated by the high current overcomes the reaction spring force, causing the trip unit to pull the operating mechanism and trip the switch instantaneously. During overload, the current increases, intensifying heat generation; the bimetallic strip deforms to a certain extent to push the mechanism into action (the higher the current, the shorter the action time). Electronic types use current transformers to collect phase current magnitudes, compare them with set values, and when current anomalies occur, the microprocessor sends a signal to cause the electronic trip unit to activate the operating mechanism. The function of a circuit breaker is to cut off and connect load circuits, as well as to interrupt fault circuits, preventing accident escalation and ensuring safe operation. Arc extinguishing is a critical issue for high-voltage circuit breakers. The principle of blow-out arc extinguishing mainly involves cooling the arc to weaken thermal ionization, and on the other hand, elongating the arc through blowing to enhance the recombination and diffusion of charged particles, while simultaneously blowing away charged particles in the arc gap, rapidly restoring the insulation strength of the medium. Low-voltage circuit breakers, also known as automatic air switches, can be used to connect and disconnect load circuits, and also to control motors that do not start frequently. Their functions equate to the sum of part or all of the functions of electrical components such as knife switches, overcurrent relays, undervoltage relays, thermal relays, and residual current protective devices, making them important protective appliances in low-voltage distribution networks. Low-voltage circuit breakers offer multiple protection functions (overload, short-circuit, undervoltage protection, etc.), adjustable action values, high breaking capacity, easy operation, and safety, leading to their widespread application. Structure and working principle: Low-voltage circuit breakers consist of an operating mechanism, contacts, protective devices (various trip units), and an arc extinguishing system. The main contacts of a low-voltage circuit breaker are closed via manual operation or electric closing. After the main contacts close, the free-trip mechanism locks the main contacts in the closed position. The coil of the overcurrent trip unit and the thermal element of the thermal trip unit are connected in series with the main circuit, while the coil of the undervoltage trip unit is connected in parallel with the power supply. When a short circuit or severe overload occurs in the circuit, the armature of the overcurrent trip unit attracts, causing the free-trip mechanism to act and the main contacts to disconnect the main circuit. When the circuit is overloaded, the thermal element of the thermal trip unit heats up, causing the bimetallic strip to bend and push the free-trip mechanism into action. When the circuit experiences undervoltage, the armature of the undervoltage trip unit releases, also causing the free-trip mechanism to act. The shunt trip unit is used for remote control; during normal operation, its coil is de-energized. When remote control is needed, pressing the start button energizes the coil.

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