Product Overview
The PQ-F335SP power quality monitoring device is designed for online monitoring of electrical network quality parameters in power distribution systems, industrial plants, substations, and energy management platforms. It integrates measurement, analysis, event recording, storage, display, and communication functions to help users evaluate supply reliability and grid disturbance conditions.
The single-channel configuration is suitable for one voltage and current monitoring point, while the platform can also support expanded configurations according to project needs. With ARM plus DSP architecture, 16-bit synchronous A/D acquisition, embedded Linux software, and frequency tracking technology, the device provides accurate and stable power quality data for long-term operation.
Key Features
- Measures grid frequency, three-phase fundamental voltage and current, active power, reactive power, power factor, and phase angle.
- Monitors voltage deviation, frequency deviation, voltage unbalance, current unbalance, negative sequence components, and DC voltage component.
- Analyzes voltage and current harmonics from the 2nd to 65th order, including THD, individual harmonic ratio, amplitude, and phase.
- Supports advanced power quality indicators such as interharmonics, voltage fluctuation, flicker, voltage sag, voltage swell, short interruption, and temporary overvoltage.
- 25.6kHz sampling rate with 512 points per cycle and 16-bit synchronous A/D conversion.
- Event-triggered waveform recording captures pre-event and post-event data for disturbance analysis.
- 5.6 inch color LCD with 640 x 480 resolution for local graphical data display.
- Built-in storage can retain historical monitoring data for up to one year using first-in-first-out updating.
- Industrial Ethernet, RS485, USB, and optional customized remote communication support data integration.
Main Monitoring Functions
|
Function |
Description |
|
Basic measurements |
Frequency, voltage, current, active power, reactive power, power factor, and phase angle |
|
Power quality steady-state indicators |
Voltage deviation, frequency deviation, voltage unbalance, current unbalance, negative sequence voltage/current, and DC component |
|
Harmonic monitoring |
2nd to 65th order voltage and current harmonics, THD, individual content ratio, amplitude, and phase |
|
Advanced indicators |
Interharmonics, voltage fluctuation, flicker, voltage sag, voltage swell, short interruption, and temporary overvoltage |
|
Display |
Large color LCD for real-time data and graphical power quality information |
|
Recording and storage |
Real-time storage of basic and advanced monitoring indicators with long-term history retention |
|
Statistics |
Online statistics for key indicators, including three-second average values within minute-level records |
|
Communication |
Industrial Ethernet, RS485, USB, and optional remote communication modes |
|
Time synchronization |
Network time synchronization and IRIG-B time input support |
Measurement Accuracy and Performance
|
Item |
Specification |
|
Voltage maximum permissible error |
+/-0.1% |
|
Current maximum permissible error |
+/-0.1% |
|
Frequency maximum permissible error |
+/-0.01Hz |
|
Frequency measurement range |
42.5Hz to 57.5Hz |
|
Three-phase voltage negative sequence unbalance error |
+/-0.15% |
|
Three-phase current unbalance maximum error |
+/-1% |
|
Flicker maximum permissible error |
+/-5% |
|
Voltage fluctuation maximum permissible error |
+/-5% |
|
Harmonic accuracy |
Class A |
|
Interharmonic accuracy |
Class A |
|
Sampling rate |
25.6kHz, 512 points per cycle |
|
A/D conversion |
16-bit synchronous sampling |
Electrical Specifications
|
Item |
Specification |
|
Working power supply |
AC 110V-220V +/-20%, 50Hz +/-2.5Hz, harmonic distortion <=15%; or DC 110V-220V +/-20%, ripple coefficient <=5% |
|
Current input method |
Current transformer input |
|
Rated current |
1A or 5A |
|
Current measurement range |
5mA-1.2A or 10mA-6A |
|
Current input burden |
<=0.5VA per channel |
|
Current overload capacity |
4In continuous; 10In for 1s |
|
Voltage input method |
Voltage transformer input or direct input |
|
Rated voltage |
57.7V/100V or 220V/380V |
|
Voltage measurement range |
5V-120V or 10V-420V |
|
Voltage input burden |
<=0.5VA per channel |
|
Voltage overload capacity |
1.2Un continuous; 4Un for 1s |
|
Voltage input impedance |
>100k ohm |
I/O, Communication and Installation
|
Item |
Specification |
|
Switch input |
DC 12V internal excitation |
|
Switch output |
Electromagnetic relay output |
|
Relay contact capacity |
8A continuous, 250V AC / 24V DC |
|
Alarm contact note |
Limit alarm is normally open dry contact; power-loss alarm is normally closed dry contact |
|
Display and operation |
5.6 inch color LCD, 640 x 480 resolution, LED indicators, and front-panel keys |
|
Communication ports |
Industrial Ethernet 100Mbps, RS485, USB, optional RS232C/RS485 and customized GPRS communication |
|
Time synchronization |
Network time synchronization and IRIG-B interface |
|
Overall dimensions |
Approx. 298 x 179.2 x 216 mm |
|
Panel cutout reference |
Approx. 252 x 178 mm cutout area with 282 mm mounting width reference |
Safety, EMC and Environmental Ratings
|
Item |
Specification |
|
Insulation strength |
2500V AC, 50Hz, 1 minute without breakdown or flashover |
|
Insulation resistance |
>=20M ohm under normal test atmosphere |
|
Impulse voltage |
1.2/50us standard lightning impulse, open-circuit test voltage 6kV |
|
Damp heat resistance |
GB/T 2423.9-2001 constant damp heat test, +40°C +/-2°C, 93% +/-3% RH, 48h |
|
Electrostatic discharge immunity |
GB/T 17626.2-1998 severity level IV |
|
Radiated RF immunity |
GB/T 17626.3-1998 severity level III |
|
Fast transient burst immunity |
GB/T 17626.4-1998 severity level IV |
|
Surge immunity |
GB/T 17626.5-1998 severity level III |
|
Normal operating temperature |
-10°C to +55°C |
|
Limit operating temperature |
-25°C to +65°C |
|
Relative humidity |
5% to 95% |
|
Atmospheric pressure |
86kPa to 106kPa |
|
Altitude |
<=3000m |
|
Protection grade |
IP50 |
Typical Applications
- Utility power quality monitoring points
- Substation and distribution automation systems
- Industrial power distribution rooms
- Renewable energy and grid connection monitoring
- Power quality management centers requiring Ethernet or RS485 communication
- Facilities needing harmonic, flicker, unbalance, and voltage event analysis
Why Choose This Product
This power quality monitoring device combines Class A harmonic and interharmonic measurement, transient event recording, long-term data storage, local LCD display, and multiple communication interfaces. It helps operators identify voltage events, harmonic pollution, unbalance problems, and power quality trends before they affect equipment reliability or energy management decisions.
Ordering Information
When ordering, please confirm the circuit configuration, rated current input, rated voltage input, communication interface requirement, time synchronization method, relay output requirement, panel installation requirement, and any customized data transmission or monitoring platform requirements.
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