18-step capacitor control with 5" color TFT touchscreen, dual communication (Modbus RTU + TCP), and full harmonic analysis from 2nd to 50th harmonic. STM32H7 ARM Cortex-M7 processor.
PFC-7000T is Forte's reactive power compensation control relay. It runs on an STM32H7 ARM Cortex-M7 processor under FreeRTOS. It controls 18 capacitor steps, has a 5" capacitive colour TFT touchscreen (800×480) and communicates over Modbus RTU and Modbus TCP.
Full harmonic analysis from 2nd to 50th harmonic (512-point FFT at 25 kHz sampling) compliant with IEC 61000-4-7. Three display themes (Day/Night/Alarm) with 200ms data refresh rate.
18 outputs with flexible output types: full relay, full transistor, or mixed configurations. ULN2003ADR Darlington output drivers.
800×480 capacitive TFT with LVGL graphics library. 7 screens: Auto Mode, Energy Analyzer, Harmonic Analysis, Programming, Manual Mode, Service, Factory. Day/Night/Alarm themes.
512-point FFT at 25 kHz sampling. Voltage and current harmonics from 2nd to 50th. THD-V, THD-I, K-factor and crest factor calculation.
Sequential, circular (FIFO), intelligent (closest ΔQ step selection), and combined detuned. Single-phase and three-phase configurations. Adjustable target cos φ from 0.30 to 1.00.
Modbus RTU over RS-485 (up to 115200 baud) and Modbus TCP over Ethernet (Port 502). 1446+ Modbus registers covering all measurements, parameters and commands.
Overvoltage, undervoltage, overcurrent, over-temperature, THD alarm and supply monitoring. 20-record fault memory with timestamps, stored in NOR Flash for power-loss resilience.
Complete technical parameters for the PFC-7000T reactive power compensation control relay.
| Parameter | Value |
|---|---|
| General | |
| Product | PFC-7000T — Reactive Power Compensation Control Relay |
| Processor | STM32H7SE46 ARM Cortex-M7 @ 600 MHz |
| Operating System | FreeRTOS (real-time) |
| Memory | OCTO-SPI NOR Flash 64 MB + HyperRAM 16 MB |
| Display | 5" TFT capacitive touchscreen, 800×480 px, 24-bit color |
| Power Supply | 220V AC → 24V DC (IRM-20-24) → 5V → 3.3V |
| Operating Temperature | −10°C ~ +55°C |
| Step Outputs | 18 channels (relay or transistor, selectable) |
| Alarm Relay | 1 (dedicated) |
| Buzzer | Built-in audible alarm |
| Digital Inputs | 3 (external fault, generator input) |
| Measurement | |
| Voltage | 3-phase independent (L-N and L-L), MCP6021 op-amp signal conditioning |
| Current | 3-phase independent, CT primary 1–5000 A, CT secondary 1A or 5A selectable |
| Active Power (P) | kW, per phase and total |
| Reactive Power (Q) | kvar, per phase and total (inductive/capacitive direction) |
| Apparent Power (S) | kVA, per phase and total |
| Power Factor (cos φ) | Per phase and average + tan φ |
| Frequency | 50/60 Hz (selectable, auto-detection) |
| ADC | 12-bit, 25 kHz sampling, 6 channels (3V + 3I) |
| Harmonic Analysis | |
| Range | 2nd – 50th harmonic (49 components) |
| Method | 512-point FFT at 25 kHz sampling |
| Voltage Harmonics | % and absolute (V) |
| Current Harmonics | % and absolute (A) |
| THD-V and THD-I | Total, odd, even harmonic separation |
| K-Factor | Transformer loading indicator |
| Crest Factor | Voltage and current |
| Standard | IEC 61000-4-7 compliant |
| Control | |
| Steps | 18 channels |
| Output Types | Relay / Transistor (SSR/Thyristor) / Mixed — factory selectable |
| Control Modes | 6 modes (3P 3×6 L-N, 3P mixed, 3P 3×6 L-L, 3P 18×3P, 1P 18×3P, 1P + capacitor current) |
| Control Principles | Sequential / Circular (FIFO) / Intelligent (closest ΔQ) / Combined detuned |
| Target cos φ | 0.30 – 1.00, IND or CAP selectable, dual target support |
| Hysteresis | ±0.02 |
| Connection Time | 50–1000 ms (configurable) |
| Disconnection Time | 50–1000 ms |
| Discharge Time | 50–1000 ms |
| Communication | |
| RS-485 | Modbus RTU, SN65HVD72DR, 9600–115200 baud |
| Ethernet | Modbus TCP, LAN8742A PHY, Port 502 |
| USB | Type-A, firmware update support |
| Registers | 1070 Input + 260 Holding + 58 Coil + 58 Discrete = 1446+ addresses |
| Protection | |
| Overvoltage | >115% nominal → disconnect all steps |
| Undervoltage | <85% nominal → disconnect all steps |
| Overcurrent | >125% CT primary → disconnect all steps |
| Over-Temperature | > set threshold → disconnect all steps |
| THD-V Alarm | > set harmonic threshold → alarm (log) |
| 24V Supply Fault | <21V or >27V → disconnect all steps |
| Under-Compensation | cos φ deviation from target → warning |
| Over-Compensation | cos φ deviation from target → warning |
| Fault Memory | 20 records (FIFO), NOR Flash persistent, timestamp + fault code + phase |
The PFC-7000T features 7 purpose-built screens on a 5" capacitive TFT touchscreen with Day, Night and Alarm display themes.
Real-time cos φ gauge, P/Q/S power cards, step status and 3-phase summary display.
Large-format detailed measurement display with 11 selectable parameters for in-depth analysis.
2nd–50th harmonic bar chart with scrollable list, voltage/current separation, THD and K-factor.
All parameter settings including cos φ target, CT ratio, timing and protection thresholds.
Step-by-step manual connect and disconnect control for commissioning and testing.
Fault memory log, min/max records and system information for diagnostics and maintenance.
Password-protected hardware configuration including output type selection and serial number.
We select the step configuration and output type for your compensation panel, at no cost before commitment.
Technical documents for this product. Ask for a document still in preparation and we will send it as soon as it is ready.
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