Knick electrical components Germany Knick model Knick price

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/spike energy while suppressing the abnormal voltage to a safe range, thereby improving the safety and stability of the circuit. In the standby state, the surge absorber (varistor) has very high impedance (several megaohms) relative to the protected electronic components and does not affect the characteristics of the original design circuit. However, when an instantaneous surge voltage appears (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, thereby 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 screen backlights. (2) Applications in automobiles and heavy machinery: Light-emitting diodes are widely used 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 mainly 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 conventional light-emitting devices, light-emitting diodes are used in miner's lamps and underground lighting equipment. Although not yet fully widespread, they will soon see extensive adoption, and light-emitting diodes will replace conventional 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 provide energy savings, simple drive and control, and maintenance-free operation. The replacement of neon lights by light-emitting diodes is an inevitable trend in the development of lighting equipment.

Knick electrical component classification

Standard 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 standard power supplies, parameter power supplies, voltage-regulating power supplies, and 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, and 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 force, causing the trip unit to pull the operating mechanism and instantly trip the switch. During overload, the current increases, intensifying heat generation. The bimetallic strip deforms to a certain extent, pushing the mechanism to actuate (the higher the current, the shorter the action time). Electronic types use current transformers to collect the current magnitude of each phase and compare it with set values. When the current is abnormal, the microprocessor sends a signal to activate the electronic trip unit, which drives the operating mechanism. The function of a circuit breaker is to connect and disconnect 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 reduce thermal ionization. On the other hand, blowing the arc elongates it, enhancing the recombination and diffusion of charged particles, while simultaneously dispersing charged particles from the arc gap, rapidly restoring 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 to control motors that do not start frequently. Their functionality equates to the sum of part or all of the functions of devices such as knife switches, overcurrent relays, undervoltage relays, thermal relays, and residual current protective devices. They are 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, protection 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 them 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 open the main contacts, disconnecting the main circuit. When the circuit is overloaded, the thermal element of the thermal trip unit heats up, bending the bimetallic strip and pushing the free-trip mechanism to actuate. When the circuit experiences undervoltage, 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 required, pressing the start button energizes the coil.

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