Rogowski power and power quality analyzer | DIN rail mounted | with data logging | MODBUS TCP / RTU | MQ21

Technical Specifications

Type: DIN rail power and power quality analyzer
Model: MQ21
Mounting: DIN rail
Power supply: From main circuit 90–528 V AC or external 18650 lithium battery (not included)
Communication: MODBUS TCP; MODBUS RTU
Harmonic analysis: Up to the 51st harmonic (simultaneous)
Data storage: 16 GB microSD card; Data export via USB
Operating mode: Continuous (stationary)
Supported current sensors: Rogowski coils; 333 mV CT transformers; Current clamps
Configurable current ranges: 600 A / 3000 A / 6000 A
Recommended Rogowski coils:
• 600 A – MRC-36
• 3000 A – NRC-150
• 6000 A – NRC-200
Current clamps:
• ST08 – 10 A / 100 mA / 10 A
• ST08 – 10 A / 320 mV
Voltage measurement: Direct or via VT – up to 500 kV
Measured parameters: Current; Voltage; Active and reactive power; Electrical energy; Power factor (cos φ); Demand; Harmonic spectrum; Phase angle; Phase balance; Frequency; Maximum and minimum values; Voltage sags and swells; Real-time waveform; Line voltage
Additional features: Online power quality monitoring platform (optional), remote data analysis and monitoring, integration into BMS / SCADA / EMS systems

Functions

Voltage and current measurement – continuous real-time monitoring of electrical network parameters
Power and energy analysis – calculation of active, reactive, apparent power and electrical energy (kWh)
Harmonic analysis (up to 51st) – identification of power quality distortions and harmonic impact
Voltage sag / swell and imbalance monitoring – identification of grid stability issues
Waveform analysis – visual evaluation of voltage signals for fault diagnostics
Event logging – recording of power quality disturbances with time and duration
Data logging and export – storage on microSD card and data retrieval via USB
MODBUS TCP / RTU communication – integration into BMS, SCADA and energy management systems

Applications

For engineers / energy specialists: Power quality and harmonic audits, long-term network analysis, fault cause identification
For industrial and commercial facilities: Monitoring of production lines and transformers, supervision of critical power points, power system optimization
For electricians: Fast network checks, long-term DIN rail measurements without power disconnection

Advantages

True DIN rail Power Quality Analyzer
Simultaneous harmonic analysis up to the 51st order
Data logging and waveform analysis
MODBUS TCP / RTU integration
Compatible with Rogowski coils up to 6000 A

Limitations

Accessories not included
Configuration required according to selected sensors
Designed for professional use