EFFEKTA supply electrical components German EFFEKTA supply models EFFEKTA supply prices

EFFEKTA supply 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 energy while suppressing the abnormal voltage to a safe range, thereby improving line safety and stability. In the standby state, the surge absorber (varistor) has very high impedance (several megohms) relative to the protected electronic components and does not affect the characteristics of the original circuit design. However, when an instantaneous surge voltage occurs (exceeding the breakdown voltage of the surge absorber), the impedance of the surge absorber drops low (to only a few ohms), causing a short circuit in the line, thus protecting electronic products or more expensive components.

EFFEKTA supply electrical component composition

Internal accessories of circuit breakers: Auxiliary contacts are mechanically linked to the opening and closing mechanism of the main circuit of the circuit breaker. They are mainly used to display the open/closed status of the circuit breaker. Connected in the control circuit of the circuit breaker, they control or interlock related electrical devices through the opening and closing of the circuit breaker. Alarm contacts are used for accident alarms in circuit breakers. These contacts operate only after the circuit breaker trips and opens. They are mainly used when the load of the circuit breaker experiences faults such as overload, short circuit, or undervoltage, causing free tripping. The alarm contact switches from its normally open position to a closed position, connecting indicator lights, electric bells, buzzers, etc., in the auxiliary circuit to display or remind of the fault trip status of the circuit breaker. Since the probability of free tripping due to load faults is relatively low. Shunt release: A shunt release is a release device excited by a voltage source; its voltage is independent of the main circuit voltage. It is an accessory for remote opening operation. When the power supply voltage is any value between 70% and 110% of the rated control power supply voltage, the circuit breaker can reliably open. The shunt release operates on a short-time duty cycle; the coil energization time generally must not exceed 3S, otherwise the coil will burn out. To prevent coil burnout in molded case circuit breakers, a microswitch is connected in series with the shunt release coil. When the shunt release pulls in via the armature, the microswitch changes from normally closed to normally open. Since the control circuit for the shunt release power is cut off, even if the button is held down manually, the shunt coil will not be energized again, avoiding coil damage. After the circuit breaker is reset and closed, the microswitch returns to the normally closed position. Undervoltage release: An undervoltage release is a device that causes the circuit breaker to open with or without delay when its terminal voltage drops to a specified range. Under thermal conditions, it must ensure reliable closing of the circuit breaker. Therefore, when a certain voltage drop occurs in the power supply voltage of the protected circuit, it can automatically open the circuit breaker to cut off the power, protecting downstream load appliances or electrical equipment from damage due to undervoltage. During use, the undervoltage release coil is connected to the power side of the circuit breaker; the circuit breaker can only close after the undervoltage release is energized.

EFFEKTA supply electrical component characteristics

Resolution refers to the ability of a sensor to detect the smallest change in the measured quantity. That is, if the input changes slowly from a non-zero value, the sensor output will not change until the input change exceeds a certain value; the sensor cannot resolve changes below this threshold. Only when the change in the input exceeds the resolution will the output change. Typically, the resolution at various points within the full-scale range of a sensor is not identical. Therefore, the maximum change in input within the full scale that causes a step change in the output is commonly used as the metric for resolution. If this metric is expressed as a percentage of the full scale, it is termed resolution. Resolution has a negative correlation with sensor stability.

EFFEKTA supply electrical component applications

Thermistors can also serve as electronic circuit components for temperature compensation in instrument circuits and cold-junction temperature compensation for thermocouples. Utilizing the self-heating characteristic of NTC thermistors enables automatic gain control, forming RC oscillator amplitude-stabilizing circuits, delay circuits, and protection circuits. When the self-heating temperature is significantly higher than the ambient temperature, the resistance is also related to the heat dissipation conditions of the environment. Therefore, this characteristic of thermistors is often utilized in anemometers, flow meters, gas analyzers, and thermal conductivity analysis to create specialized detection elements. PTC thermistors are mainly used for overheat protection of electrical equipment, contactless relays, constant temperature control, automatic gain control, motor starting, time delay, automatic degaussing in color televisions, fire alarms, and temperature compensation. Main disadvantages: (1) severe nonlinearity in the relationship between resistance and temperature; (2) poor consistency and interchangeability of components; (3) components are prone to aging and have poor stability; (4) except for special high-temperature thermistors, most thermistors are only suitable for the 0 to 160 °C range, which must be noted during use.

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