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, 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 electronic products: In electronic products, light-emitting diodes are generally used 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 backlight source for displays. (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 (generally, the lifespan of light-emitting diodes exceeds that of automobiles and heavy machinery). (3) Applications in coal mines: Because light-emitting diodes have higher efficiency, lower energy consumption, longer life, and higher luminous intensity compared to ordinary light-emitting devices, they are used in miner's lamps and underground lighting equipment. Although not yet fully popularized, they will soon see widespread adoption, and light-emitting diodes will replace ordinary light-emitting devices in coal mine applications. (9) Urban decorative lighting: In today's prosperous commercial era, neon lights are an important symbol of urban vibrancy, but they have many disadvantages, 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, and maintenance-free operation. Replacing neon lights with light-emitting diodes is an inevitable trend in 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, purified 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 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

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 counterforce spring, and the trip unit actuates the operating mechanism, causing the switch to trip 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 operating 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 cause the electronic trip unit to actuate 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 that high-voltage circuit breakers must address. The principle of arc blowing and extinguishing primarily involves cooling the arc to reduce thermal ionization. On the other hand, arc blowing elongates the arc to enhance the recombination and diffusion of charged particles, while simultaneously blowing away charged particles from the arc gap, rapidly restoring the dielectric insulation strength. 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 is 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, making them important protective appliances in low-voltage distribution networks. Low-voltage circuit breakers are widely used due to their multiple protection functions (overload, short circuit, undervoltage protection, etc.), adjustable operating values, high breaking capacity, ease of operation, and safety. Structure and working principle: A low-voltage circuit breaker consists 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 heating 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 pulls in, causing the free-trip mechanism to operate and the main contacts to disconnect the main circuit. When the circuit is overloaded, the heating element of the thermal trip unit generates heat, 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 operate. 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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