Knick electrical components Germany Knick models Knick prices

Knick electrical components are surge absorbers/varistor assemblies. Due to their nonlinear resistance change with voltage, they exhibit symmetry in both directions (positive and negative). They respond to abnormal voltages on the line, absorbing most of the surge/lightning energy while suppressing the abnormal voltage to a safe range, thereby improving the safety and stability of the circuit. In the standby state, surge absorbers (varistors) have very high impedance (several megohms) relative to the protected electronic components and do not affect the characteristics of the original design circuit. However, when instantaneous surge voltages appear (exceeding the breakdown voltage of the surge absorber), the impedance of the surge absorber drops low (only a few ohms), causing a short circuit in the line, thus protecting electronic products or more expensive components.

Knick electrical component applications

Light-emitting diodes are widely used in many fields. The following outlines their main applications: (1) Applications in consumer electronics: Light-emitting diodes are generally used in consumer electronics as backlight sources for screens or for display and lighting purposes. From large LCD TVs and computer monitors to media players MP3, MP4, and mobile phones, light-emitting diodes are used as the screen backlight source. (2) Applications in automobiles and heavy machinery: Light-emitting diodes are extensively applied in automobiles and heavy machinery. Turn signals, interior lighting, instrument panel lighting, headlights, indicator lights, brake lights, tail lights, and other components in automobiles and heavy mechanical equipment utilize light-emitting diodes. This is primarily because light-emitting diodes offer fast response times and long service life (the lifespan of a light-emitting diode is generally longer than that of the automobile or heavy machinery itself). (3) Applications in coal mines: Due to characteristics such as high efficiency, low energy consumption, long lifespan, and high luminous intensity compared to ordinary light-emitting devices, light-emitting diodes are used in miners' lamps and underground lighting equipment. Although not yet fully widespread, they will soon see extensive adoption, and light-emitting diodes will replace ordinary light-emitting devices in coal mining applications. (9) Urban decorative lighting: In today's bustling commercial era, neon lights are an important symbol of urban prosperity, but they have many drawbacks, such as insufficient lifespan. Therefore, replacing neon lights with light-emitting diodes offers many advantages. Compared to neon lights, light-emitting diodes not only have a longer lifespan but also feature energy savings, simple drive and control requirements, and maintenance-free operation. The replacement of neon lights by light-emitting diodes is an inevitable result of the development of lighting equipment.

Knick electrical component classification

Ordinary power supplies can be subdivided into: switching power supplies, inverter power supplies, AC stabilized power supplies, DC stabilized power supplies, DC/DC power supplies, communication power supplies, module power supplies, variable frequency power supplies, UPS power supplies, EPS emergency power supplies, purification power supplies, PC power supplies, rectifier power supplies, custom power supplies, heating power supplies, welding power supplies/arc power supplies, electroplating power supplies, network power supplies, power operation power supplies, adapter power supplies, linear power supplies, power controllers/drivers, power power supplies, other ordinary power supplies, parameter power supplies, voltage-regulating power supplies, transformer power supplies. Special power supplies can be subdivided into: shore power supplies, security power supplies, high-voltage power supplies, medical power supplies, military power supplies, aerospace power supplies, laser power supplies, other special power supplies.

Knick electrical component principles

Circuit breakers generally consist 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, and the trip unit pulls the operating mechanism to actuate, causing the switch to trip instantaneously. During overload, the current increases, heat generation intensifies, and the bimetallic strip deforms to a certain extent to push the mechanism into action (the greater the current, the shorter the action time). There are electronic types that use current transformers to collect the current magnitude of each phase, compare it with the set value, and when the current is abnormal, the microprocessor sends a signal to cause the electronic trip unit to drive the operating mechanism. The function of a circuit breaker is to cut off and connect load circuits, as well as to cut off fault circuits, prevent accidents from expanding, and ensure safe operation. Arc extinguishing is a problem that high-voltage circuit breakers must solve. The principle of blowing out and extinguishing arcs is mainly to cool the arc to weaken thermal ionization. On the other hand, blowing the arc elongates it, strengthening the recombination and diffusion of charged particles, while blowing away charged particles in the arc gap to quickly restore the insulating strength of the medium. Low-voltage circuit breakers, also known as automatic air switches, can be used to connect and disconnect load circuits and can also be used to control motors that do not start frequently. Their functions are equivalent 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. They are important protective electrical appliances in low-voltage distribution networks. Low-voltage circuit breakers have multiple protection functions (overload, short circuit, undervoltage protection, etc.), adjustable action values, high breaking capacity, convenient operation, and safety advantages, so they are widely used. Structure and working principle: Low-voltage circuit breakers consist of an operating mechanism, contacts, protection devices (various trip units), and an arc extinguishing system. The main contacts of a low-voltage circuit breaker are closed by 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 actuate 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 voltage is too low, the armature of the undervoltage trip unit releases, also causing the free-trip mechanism to actuate. 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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