ABB Drives electrical components German ABB Drives models ABB Drives prices

ABB Drives electrical components are switches controlled by electromagnets, that is, a combination of an electromagnet and a switch. When the electromagnet coil is energized, it generates electromagnetic attraction, causing the movable iron core to push or pull the switch contacts to close, thereby connecting the controlled circuit. Electromagnetic switches are widely used in various industries, most commonly as contactors in the industrial sector. An electromagnetic switch is the control switch on a starter motor and is one of the three major components of a starter (DC motor, transmission engagement mechanism, electromagnetic switch). Its working principle is that the coil generates electromagnetic attraction when energized, causing the movable iron core to move, which on one hand pulls the transmission engagement mechanism to move the starter pinion forward to engage with the engine flywheel ring gear, and on the other hand pushes the switch contacts to connect, allowing the DC motor to be energized and operate, thereby driving the engine to start.

ABB Drives electrical component parameters

(1) Rated operating voltage: refers to the voltage required by the coil for the relay to operate normally. Depending on the relay model, it can be AC voltage or DC voltage. (2) DC resistance: refers to the DC resistance of the coil in the relay, which can be measured with a multimeter. (3) Pull-in current: refers to the minimum current required for the relay to perform the pull-in action. During normal use, the supplied current must be slightly greater than the pull-in current so that the relay can work stably. For the operating voltage applied to the coil, it generally should not exceed the rated operating voltage; otherwise, excessive current will be generated, burning out the coil. (4) Release current: refers to the maximum current at which the relay performs the release action. When the current in the pulled-in state of the relay decreases to a certain level, the relay will return to the de-energized released state. At this time, the current is much smaller than the pull-in current. (5) Contact switching voltage and current: refer to the voltage and current that the relay is allowed to handle. This determines the magnitude of voltage and current the relay can control. During use, these values must not be exceeded; otherwise, the relay contacts are easily damaged.

ABB Drives electrical component applications

Semiconductor diodes are used in almost all electronic circuits. The use of semiconductor diodes in circuits can protect the circuit and extend its service life. The development of semiconductor diodes has optimized integrated circuits and played a positive role in various fields. Diodes play many roles in integrated circuits, maintaining their normal operation. The following briefly introduces the roles of diodes in the following four types of circuits. (1) Switching circuit: In digital and integrated circuits, the unidirectional conductivity of diodes is used to achieve circuit conduction or disconnection. This technology has been widely applied. Switching diodes can effectively protect circuits from damage due to short circuits and other issues, and can also realize the functions of traditional switches. Another characteristic of switching diodes is their fast switching speed, which is incomparable to traditional switches. (2) Limiter circuit: In electronic circuits, limiter circuits are commonly used to process various signals. They are used to selectively transmit part of the signal within a preset voltage level range. Most diodes can be used for limiting, but sometimes specialized limiter diodes are required, such as when protecting instruments. (3) Voltage stabilization circuit: Zener diodes are typically used in voltage stabilization circuits. They are junction-type silicon semiconductor diodes manufactured using special processes. These special diodes have high impurity concentrations and high charge density in the space charge region, making it easy to form a strong electric field. When the reverse voltage across the Zener diode reaches a certain value, the reverse current increases sharply, causing reverse breakdown. (12) Varactor circuit: Varactor diodes are commonly used in varactor circuits to achieve automatic frequency control, tuning, frequency modulation, and scanning oscillation.

ABB Drives electrical component composition

Internal accessories of circuit breakers: Auxiliary contacts are contacts 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 to the control circuit of the circuit breaker, they implement control or interlocking of related electrical appliances through the opening and closing of the circuit breaker. Alarm contacts are used for accident alarms in circuit breakers. These contacts only act 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 changes from its original 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 not high. Shunt trip release: A shunt trip release is a release excited by a voltage source, and its voltage is independent of the main circuit voltage. A shunt trip release is an accessory for remote opening operation. When the power supply voltage is any voltage between 70% and 110% of the rated control power supply voltage, the circuit breaker can be reliably disconnected. The shunt trip release operates in short-time duty mode, and the coil energization time generally cannot exceed 5S; otherwise, the coil will be burned out. To prevent coil burnout in molded case circuit breakers, a microswitch is connected in series with the shunt trip coil. When the shunt trip release is pulled in via the armature, the microswitch switches from normally closed to normally open. Since the control line for the shunt trip release power supply is cut off, even if the button is manually pressed, the shunt coil will not be energized, thus avoiding coil damage. After the circuit breaker is reclosed, the microswitch returns to the normally closed position. Undervoltage release: An undervoltage release is a release that causes the circuit breaker to disconnect with or without delay when its terminal voltage drops to a specified range. Under thermal conditions, it should 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 disconnect the circuit breaker to cut off the power, protecting the load appliances or electrical equipment downstream of the circuit breaker from undervoltage damage. During use, the undervoltage release coil is connected to the power side of the circuit breaker. The circuit breaker can only be closed after the undervoltage release is energized.

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