SUDKABEL electrical components Germany SUDKABEL model SUDKABEL price

SUDKABEL electrical component is a photodetector that converts light into current or voltage signals depending on the mode of use. The die often uses a PN junction with photosensitive characteristics, which is very sensitive to changes in light, has unidirectional conductivity, and changes its electrical characteristics when the light intensity varies. Therefore, the current in the circuit can be changed by varying the light intensity. Photodiodes are also called photoelectric diodes. Photodiodes are similar in structure to semiconductor diodes; their die is a PN junction with photosensitive characteristics and has unidirectional conductivity, so a reverse voltage must be applied during operation. When there is no illumination, there is a very small saturated reverse leakage current, i.e., dark current, and the photodiode is cut off. When illuminated, the saturated reverse leakage current increases significantly, forming a photocurrent that varies with the intensity of the incident light. When light irradiates the PN junction, electron-hole pairs are generated in the PN junction, increasing the density of minority carriers. These carriers drift under reverse voltage, increasing the reverse current. Therefore, the current in the circuit can be changed by varying the light intensity.

SUDKABEL electrical component function

The main purposes of disconnect switches (knife switches) are: 1, to isolate the power supply, disconnecting high-voltage maintenance equipment from live equipment, providing a clearly visible break point between them. 2, disconnect switches cooperate with circuit breakers to perform switching operations as required by the system operating mode, thereby changing the system wiring configuration. 3, to connect or disconnect low-current circuits. Disconnect switches can perform the following operations: make or break bypass currents of closed-loop switches; make or break grounding connections at transformer neutrals, but if an arc-suppression coil is connected to the neutral, operation is permitted only when the system is fault-free; make or break voltage transformers and surge arresters; make or break capacitive currents of busbars and equipment directly connected to busbars; make or break no-load lines with capacitive currents not exceeding 5 amperes; three-gang disconnect switches can make or break loads with voltages up to 10 kilovolts and currents below 22 amperes. When operating disconnect switches, note that when energizing a line, first close the busbar-side disconnect switch, then the line-side disconnect switch, and finally the circuit breaker. When de-energizing a line, first open the circuit breaker, then open the disconnect switches. Do not make or break high-voltage disconnect switches under load.

SUDKABEL electrical component composition

Internal accessories of circuit breakers: Auxiliary contacts are mechanically linked to the opening and closing mechanism of the circuit breaker's main circuit. They are mainly used to indicate 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 circuit breaker fault alarms. These contacts operate only after the circuit breaker trips and opens. They are mainly used when the circuit breaker freely trips due to faults such as overload, short circuit, or undervoltage in the load. The alarm contact changes from its normally open position to a closed position, connecting indicator lights, electric bells, buzzers, etc., in the auxiliary circuit to display or alert 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 tripping device excited by a voltage source, whose voltage is independent of the main circuit voltage. A shunt release 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 in short-time duty; the coil energization time generally must not exceed 1S, 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 interrupted, the shunt coil will not be energized even if the button is manually held down, thus 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 tripping 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 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.

SUDKABEL electrical component classification

Fiber optic connectors can be divided into common single-mode and multimode connectors for silica-based fibers, as well as other fiber optic connectors using plastic etc. as the transmission medium, based on the transmission medium. Based on the connector structure, they can be classified into: FC, SC, ST, LC, D4, DIN, MU, MT, and various other forms. Among them, ST connectors are typically used at the cabling equipment end, such as fiber patch panels and fiber modules; while SC and MT connectors are typically used at the network equipment end. Based on the fiber end-face shape, they are classified into FC, PC (including SPC or UPC), and APC; based on the number of fiber cores, they are divided into single-core and multi-core (such as MT-RJ). Fiber optic connectors are widely used and come in many varieties. In practical applications, we generally distinguish them based on the different structures of fiber optic connectors.

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