JKG2B Series Reactive Power Automatic Compensation Controller Three-Phase Multi-Function Meter Active and Reactive Power Current and Voltage Display Instrument 380V

Main Product Datas

Basic parameters

Control parameters

Measurement Accuracy

Adjustable range and factory setting values of control parameters

 Overview of JKG2B Series Reactive Power Automatic Compensation Controller 

The JKG2B Series redefines precision in 3-phase power management as a hybrid reactive power compensation controller and multifunctional power instrument, engineered for 3-phase low voltage (380V) industrial and commercial grids. Unlike conventional compensators, it integrates real-time active and reactive power measurement with a dual-display interface, offering instant visibility into 3-phase current, voltage imbalances, and reactive energy compensation needs. Its automatic power factor correction system dynamically adjusts capacitive/inductive loads to neutralize reactive power in power systems, minimizing low loss and optimizing 3-phase energy efficiency. The controller’s three-phase imbalance correction module actively redistributes loads across 3 phases of power, resolving voltage fluctuations and stabilizing reactive voltage to protect sensitive power quality equipment. Built for smart grid compatibility, it enables intelligent load balancing through IoT-ready communication protocols, ensuring seamless integration with renewable energy sources and demand-response frameworks. With real-time power quality monitoring, the JKG2B detects power quality harmonics and provides actionable insights via its power quality meter dashboard, empowering operators to preempt grid instability. Ideal for factories, data centers, and smart buildings, this device excels in reactive compensation for dynamic loads while adhering to global power energy sustainability standards.
Advanced Technical Integration & Compliance
At its core, the JKG2B leverages cutting-edge reactive power compensators to address the reactive power challenges in modern electrical networks. Its total harmonic distortion (THD) analysis function scans for harmonic distortions up to the 50th order, far exceeding typical 2-15th harmonic filtering systems, ensuring compliance with stringent IEEE and IEC power qualityregulations. The multifunctional power instruments embedded within the controller measure 3-phase electrical power parameters with ±0.5% accuracy, including reactive power in electricalcircuits, active energy consumption, and reactive electricity profiles. For 3 phase 3 phasecoordination, the device employs adaptive algorithms to balance 3 phases of power in real time, mitigating overheating risks and prolonging equipment lifespan. The reactive voltagestabilization feature counters grid sag/swell events, while its function of reactive powerregulation supports bidirectional energy flow in hybrid solar-grid systems. Compatible with low voltage 380V infrastructures, the JKG2B enhances power of 3 phase reliability through intelligent load balancing and predictive maintenance alerts. As a cornerstone of power quality equipment, it aligns with global power energy initiatives by reducing carbon footprints and optimizing 3-phase energy utilization—proving indispensable for industries transitioning to smart, resilient power networks.

Key Advantages of JKG2B Series Reactive Power Automatic Compensation Controller 

• The dual display interface can display active/reactive power, three-phase current and reactive voltage in real time, enhancing real-time power quality monitoring of three-phase power systems.
  
• Advanced Total Harmonic Distortion (THD) analysis detects and mitigates power quality harmonics up to the 50th order, surpassing standard 2-15th harmonic filtering with industrial-grade accuracy.
  
• Intelligent load balancing function can dynamically redistribute the load among the three-phase power supply, solve the three-phase imbalance problem and optimize the three-phase power supply efficiency.
  
• Automatic power factor correction adjusts reactive power compensation in real time to minimize low losses and stabilize the reactive power of the power system.
  
• Integrated three-phase unbalance correction module to ensure balanced three-phase energy distribution and protect power quality equipment from overheating and voltage fluctuations.
  
• Smart grid compatibility enables reactive power compensators to achieve IoT-driven communications, supporting global power energy standards and renewable energy integration.
  
• Low voltage 380V operation, equipped with multi-function power meter, measuring reactive power and three-phase coordination can provide ±0.5% accuracy.
  
• Robust reactive power compensation technology meets the functionality of reactive power requirements, reduces carbon footprint and ensures power quality compliance for a sustainable grid.

 Working Principle of JKG2B Series Reactive Power Automatic Compensation Controller 

Real-time power quality monitoring and dual display analysis
The JKG2B multi-function power meter integrates a high-precision power quality meter that can continuously track the three-phase current, reactive voltage, and active/reactive power of a three-phase low-voltage (380V) system. The meter uses advanced DSP algorithms for total harmonic distortion (THD) analysis and can detect power quality harmonics up to 50 times, far exceeding the industrial standard threshold. Real-time data is displayed through a dual-screen interface, allowing operators to instantly view reactive power and three-phase energy consumption patterns in the circuit. The system can trigger voltage sag, swell, or unbalance alarms to quickly adjust reactive compensation, stabilize power quality, and prevent equipment damage. By dynamically correlating reactive power trends with three-phase power, the module ensures compliance with global power efficiency agreements.
Adaptive reactive power compensation and load balancing
At the core of the JKG2B is an AI-driven reactive power compensation controller that optimizes reactive power flows in three-phase power grids. It analyzes three-phase power loads in real time, deploys capacitor banks or reactors to eliminate inductive/capacitive imbalances, and implements automatic power factor correction. At the same time, its intelligent load balancing algorithm redistributes uneven loads on three-phase lines, solves three-phase unbalanced correction problems, and reduces the waste of low-loss electrical energy. The system dynamically adjusts reactive power compensation based on grid demand, stabilizing reactive voltage fluctuations caused by changes in industrial machinery or renewable energy input. This dual-effect approach not only improves the reliability of three-phase power, but also extends the service life of power quality equipment by minimizing thermal stress.
Smart Grid Interface and Harmonic Suppression Engine
Designed for smart grid compatibility, the JKG2B features a grid-adaptive interface that can be synchronized with IoT-enabled energy management systems. Its reactive power compensator uses hybrid filtering technology to suppress power quality harmonics generated by non-linear loads (e.g., solar inverters, frequency converters) while maintaining 380V low voltage stability. The harmonic suppression engine combines passive filters and active inverters to eliminate high-frequency distortion, ensuring compliance with global power energy standards such as IEEE-519. The module also supports two-way communication with grid operators to optimize reactive power in the power system during peak demand or renewable energy intermittent periods. By combining reactive power regulation capabilities with intelligent load balancing capabilities, the JKG2B ensures seamless coordination of three-phase power, making it ideal for the transition of hybrid grids to a sustainable global power energy framework.

Precautions for JKG2B Series Reactive Power Automatic Compensation Controller  Wiring

Voltage input
The controller has an automatic phase sequence judgment function, but the input voltage should be as consistent as possible with the input current, that is, the phase number and phase sequence must be consistent. At this time, either the BC line voltage or the A phase voltage can be used as a signal; the wiring method should be adjusted accordingly.

Current input

The current is taken from the A line current. The standard rated input current is 5A. When it is greater than 5A, an external current transformer (CT) is required.
Although the controller has an automatic phase sequence judgment function, the inputs should have the same nature in terms of phase and phase sequence number.
If other instruments are connected to the CT, the wiring should be connected in series.
Before removing the current input wiring of the product, please disconnect the primary circuit of the CT or short-circuit the secondary circuit.

CT Connection

In order to facilitate disassembly and assembly, terminal blocks should be used instead of direct connection to CT.

Communication wiring

The network power meter is equipped with an asynchronous half-duplex RS485 communication interface for data transmission on a communication line that follows the MODBUS-RTU protocol. A maximum of 128 network power meters can be connected to one line at the same time, and each network power meter has its communication address (Addr) set.
It is recommended to use shielded twisted pair cables for communication connection, with a wire diameter of not less than 0.5 mm. The common terminal can be omitted, or if the common terminal is grounded, a "single-ended single-point grounding" system must be used. Connect a terminal matching resistor of 120 Ω to 1 kΩ between the A and B terminals of the terminal instrument. When wiring, the communication line should be kept away from high-current cables or other strong electromagnetic field environments.
In order to protect the safety of the communication interface and the controller itself, the switch input interface and temperature interface must be isolated from other external active devices, because RS485 is not isolated from these interfaces.

Number of main switch outputs
Active output is the switching control of compensation capacitors, which is used to synchronize different customer instructions, and the number of channels is 6, 8, 10 or 12. Capacitor switching modes include first-in-first-out switching, sequential switching, manual switching, and communication switching.

This mode is called sequential switching and is suitable for situations where different groups of compensation capacitors have different capacities. Each group of compensation capacitors must be wired in descending order of capacity. The capacitor with the largest capacity should be connected to K1, and the capacitor with the smallest capacity should be connected to K2.
FIFO switching is applicable to compensation capacitor groups of the same capacity. In this case, the FIFO method can ensure that the operating time loss of each group of capacitors is equal.
Mainly used in the debugging stage, manual switching is used to evaluate the wiring and compensation effects. In the measurement display mode, the capacitance value can be input and output by the left and right keys.
Communication switching is to remotely control the capacitor through the instructions issued by the controller. At this time, the controller abandons the control function but retains the protection part. Other devices write relevant content into the controller through communication to realize the switching of the capacitor.

Product Size