300 Breaking Capacity Intelligent Integrated Low-Voltage Filtering Power Capacitor​

Technical parameters

Products overview

Intelligent integrated capacitors are mainly composed of power grid parameter sampling, intelligent network, intelligent controller, over-cast and cutting, power capacitor, line protection and other units.Intelligent integrated capacitors are divided into upper and lower split module structure, module assembly, disassembly is very convenient.The upper module is composed of cutting switch, intelligent controller, line protection, etc; the lower module consists of table or two △ -connected or Y-connected power capacitors.The intelligent integrated capacitor adopts modern detection, power electronics, over-cutting, automatic control, computer and network communication and other technologies, and its composition block diagram is shown in Figure

Intelligent controller

Intelligent controller is the control core of intelligent integrated capacitors, using high-performance, high-precision TMS320C28x series processor DSP and low-power consumption, high-performance STC89C53 microcontroller.The STC89C53 microcontroller obtains the three-phase voltage and voltage parameters of the voltage and current transformer, filter circuit and sampling circuit. The DSP calculates the reactive power Q, power factor X, active power P, frequency f and capacitor value C in real time. It controls the power operation parameters set by the user to determine whether the capacitor group reactive compensation is needed by the single chip.The microcontroller STC89C53 can achieve high-speed data exchange with the processor DSP through RS-485 communication to meet the real-time requirements of the system.

Product function

• Filtering

It effectively suppresses high-order harmonic and surge,forms low-resistance channel for high-order harmonic. It absorbs and releases the harmonic,eliminates influence of high-order harmonic to the capacitor,protects circuits and capacitors from overload,prevents capacitors from super heating, insulating medium from aging,avoids reduction of self healing performance,or reduction of service life.

• No-surge switching

Matched with special capacitor switching switch,no switching surge.

• Separate-phase compensation

Capacitor of each phase of separate-phase compensation type product can be switched separately,which improves the reactive compensating accuracy,enables the three-phase reactive unbalance to be well compensated.

• Measurement

Measurement of distribution voltage,current,reactive power,power factor,automatic measurement and correction of CT phase and change;measurement of three-phase current and inside temperature of each capacitor.

• Protection

Quick current switching and over-current protection of circuit;over-voltage and under-voltage protection of capacitor,over-temperature,open-phase and three-phase unbalance protection of capacitor,when the temperature of capacitor exceed 65℃,the whole machine of capacitor would exit operation, which improves its service life,and guarantees safety running of system.

• Signal

Switching state,over,under and compensation state,over and under-voltage state signals;protection operation type and self-diagnose fault type signals.

• Communication

Adoption of RS-485 communication coupling between capacitor and controller,which is convenient for uploading of mass of sampling data as well as information exchanging with external monitor terminal, forms system work.

• Online

Functions of wire network communication and radio network communication.

• Intelligent network control

It is able to detect and track the reactive variation of system automatically,and switch in capacitor bank automatically. Carry out switching circularly for capacitors with same capacitance,and carry out switching according to the vacancy for capacitors with different capacitance. The capacitor that is switched in earlier should exit first,that exits earlier should be switched in first;capacitor whose running temperature is lower should be switched in first,whose running temperature is higher should exit first;when the compensation situation is stable,the capacitors should be switched in circularly every fifteen minutes,avoid long time running of any one capacitor.

• Self-diagnose of faults

Intelligent control element of capacitor will carry out self-diagnose to the running parameters of the body,once there is self-inspection fault,the whole machine responses quickly and exit running.

Outline and mounting sizes