The power switch capacitor contactor (hereinafter referred to as the contactor) is a special type of contactor used for power switching of low voltage parallel capacitors. It is widely used in power factor compensation machinery and equipment for automatic compensation. It is suitable for power switching capacitors up to 90kvar in power supply systems with AC frequency of 50hz and rated working standard voltage of 380v to improve power factor. The contactor is Lego building block type, part of the resistance circuit above the main circuit, and the resistance circuit is three-way. The main touch design scheme is effective, independent load, reliable in work.
Fundamentals of switching capacitor contactors.
An early touch of a series resistor is a resistor tightly bound to the circuit. When the magnet coil of the contactor is powered on, the resistor is tightly coupled to the circuit to be connected in advance. The amount of current charges the capacitor battery according to the resistance. The resistor suppresses the capacitor closing and inrush current, and then the main circuit breaker switches off and carries the capacitor current. After the capacitor is turned off and inrush current is suppressed, the resistor circuit is separated from the main circuit and calibrated automatically, reducing the chance of burning the resistor when the capacitor is disconnected.
The switching capacitor communicates the principle of the AC contactor.
In order to better save resources and power engineering, power capacitors are upgraded in the power supply system to improve reasonable output power and reduce reactive power damage. As everyone knows, every time a group of power capacitors enter the Internet, the circuit will have a surge protector. Often referred to as inrush current. The maximum inrush current generated by the capacitor of the power capacitor and the characteristic impedance of the line on the network can be 100 times the rated voltage of the loop contactor. During the continuous work of the compensation equipment throughout the year, the posture is often frequent and the equipment failure rate is very high, so certain effective measures must be taken.
The line series reactor has a large volume and a relatively high cost. The customer urgently needs to solve a safe and stable capacitor contactor that meets the national standard. At the same time, people also want more assisted RF connectors to lower the middle of the line appliances.
Compared with products of similar volume in China, CJX2A series power switch capacitor contactors (hereinafter referred to as capacitor contactors or products) are small in size, novel in structure, suitable for each other, easy to install, excellent in characteristics, and have many contact surfaces, especially battery charging inhibition. Influx equipment, original in China. The key economic and technical indicators are higher than those of the same industry in China, and the application can be trusted and in line with national standards. It is the most satisfying electronic switch in China.
The main purpose
CJX2A series product power switch capacitor contactors are mainly used in power capacitor cabinets with rated working standard voltage of 380V under AC-6b application type, as the payment and disconnection of power capacitor banks to adjust the COS value (power factor) to suppress inrush currents in the connection process. 3. Product structure.
CJX2A series capacitor contactors are composed of battery charging and inrush current suppression equipment and AC contactors, as shown in Figure 1 below. The posture organization is a straight movement type, the contact point is a double break point, the magnetic system software is an E core, a welcoming structure, and the magnetic system software cooperates with each other for the attraction and reflection of the tower torsion spring.