PQI-LV
Enhancing Transparency in the Low-Voltage Grid
Enhancing Transparency in the Low-Voltage Grid
PQI-LV
The PQI-LV is a cost-effective class A power quality analyzer & fault recorder in accordance with IEC 61000-4-30 Ed. 4 and is designed specifically for low-voltage monitoring. It is characterized by its compact design, high-quality measurement technology and simple installation thanks to sensor technologies such as Rogowski coils and current sensors. This makes the PQI-LV the ideal solution for monitoring new consumer and generator technologies (PV, e-mobility, battery energy storage system/BESS, heat pumps) and grid monitoring in industrial applications (supraharmonics up to 20 kHz). In combination with »I-Sense«, it enables more efficient grid utilization and controllability in compact and secondary substations. This power quality analyzer meets current IT security requirements and can be easily integrated into many applications thanks to standardized interfaces and web server technology.
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PQI-LV
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WinPQ
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I-Sense: Current Feeder Measurement
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I-Sense Flyer
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Rogowski Coil
Current Clamp
Divisible Differential Current Transformer
GPS Receiver Set
PQI-LV - Transparency in the Low-Voltage Grid
Cost-Efficient Monitoring in the Low Voltage Rang
The PQI-LV is an economical Class A grid analysis device in accordance with IEC 61000-4-30 Ed. 4. Developed to meet the challenges posed by the increasing integration of new consumer and generator technologies such as PV systems, e-mobility, battery energy storage system (BESS) and heat pumps, the device also monitors inverter technologies in industrial applications safely and efficiently. As an option, the PQ analyzer records supraharmonics up to 20 kHz and can be expanded into a complete transient recorder and fault recorder for high-resolution fault records in the event of a fault.
- Ensuring power quality for fast and efficient charging and simplified troubleshooting at e-charging stations such as hyperchargers and/or DC charging parks
- …and many other possible measurement tasks in the low-voltage grid.
The Right Solution for a Wide Range of Low-Voltage Measurement Task
The PQI-LV is ideal for measuring and monitoring tasks in the low voltage range. It impresses with its cost efficiency and very high measurement accuracy (deviation < 0.1%). As a class A measuring device in accordance with IEC 61000-4-30 Ed. 4, the power analyzer always provides the right measurement data - suitable for your application:
- High-quality power quality monitoring in the secondary substation with optional current feeder measurement for up to 16 feeders with »I-Sense«
- Monitoring processes and machinery in industrial power grids
- Energy management with power quality monitoring
- Monitoring of EMC filters (passive/active)
- Monitoring of critical processes for preventive maintenance and reduction of downtimes
- Installation in large-scale PV systems to detect grid oscillations at an early stage
- Securing the power supply in critical situations in emergency power systems (EPS) and large UPS systems in data centers as well as in critical infrastructures such as hospitals, airports and military facilities and in the petrochemical industry
Compatible With »I-Sense« Current Feeder Measurement Technology
Keep the future in mind and combine PQI-LV as power quality measurement device with the simple and efficient »I-Sense« current feeder measurement technology. Use the measurement data to identify trends at an early stage and enable more efficient utilization and controllability in the depth of the grid. The system can be used to monitor up to 16 feeders in compact and secondary substations (three-phase and four-phase systems).
Easy to Install and Integrate
Quick, easy and secure installation on site via Rogowski coils. Easy wiring thanks to the daisy chain principle using standard RJ45 cables. This makes the PQI-LV power analysis device particularly user-friendly when retrofitting with existing measurement technology.
Open and Standardized Communication Interfaces
Thanks to standardized interfaces, current IoT protocols and web server technologies, the PQI-LV offers simple and secure integration into a wide range of applications. With support for standard file formats such as COMTRADE and PQDIF, the mains analysis device can be flexibly connected and guarantees maximum IT security.
- Modbus TCP & RTU
- IEC 60870-5-104
- IEC61850
- HTTPS & REST API
- COMTRADE
- PQDIF
IT Security by Design
The power quality analysis device offers state-of-the-art IT security functionality such as full audit logging, encryption technologies (AES256) and User Rights Management (URM) with Role-Based Access Control (RBAC).
High-quality power quality monitoring with the option of quick and easy current drop monitoring helps to recognise trends at an early stage and offers the advantage of being able to initiate countermeasures in good time.
High-Precision Transformer Measurement in the Local Substation - With the »PQI-LV« Power Quality Analyser
- Measure voltage, current, power and power quality parameters at the transformer infeed with less than 0.1% deviation in accordance with IEC61000-4-30 Class A Ed. 4 to assess voltage quality via power quality parameters in accordance with EN50160 and IEC61000-2-2.
- Analysis of flicker, THD, harmonics (H2-H50), supraharmonics 2-20kHz, transients & PQ events with fault recording in the event of under- or overshoot.
Measuring, Recording and Analysing Outgoing Circuits - With the »I-Sense« Current Measurement Technology
- Current measurement L1/ L2 / L3 / (N) with min. and max. values for up to 16 outgoing circuits.
- Simple connection possible using existing ‘third party devices’, such as safety edges with intelligent transformers.
Reporting - to the Point With the »WebPQ®« Analysis Software
- »WebPQ®« software solution for quick and easy evaluation of power quality data and outgoing feeders using clear, configurable reports.
Quick Comparison:
PQI-LV vs. PQI-DA smart vs. PQI-DE
Find the Right Power Quality Analyzer for Your Application.
PQI-LV
PQI-DA Smart
PQI-DE
• Secondary substation
• Depth of the grid (cable-/light-/sub-distributors)
• Industrial power grids (machinery/processes & plants)
• Retrofits
Low-voltage
✔️
10.24 kHz / Optional 40,96 kHz (B1)✔️
✔️
2 kHz to 20 kHz according to IEC61000-4-7 via software option (B1)✔️
CCCI, SSH, HTTP(S)Modbus RTU & TCP (Standard)
✔️
IEC60870-5-104 (P1), IEC61850 (P2), Modbus Master (P3) MQTT*✔️
Radius, RBAC, URM, encryption✔️
1GB ~ 140 weeks with standard template❌
DIN-rail
130 x 90 x 58mm
L x W x HDirect
230 / 400 / 690VRogowski coils & current sensors
350mV input
❌
❌
❌
Optional
• PCC / Point of Common Coupling (IEC 61000-2-2)
• POC / Point of Connection (EN 50160)
• Secondary substation with increased requirements
• Industrial applications
Low-, medium- and high-voltage
✔️
10.24 kHz / Optional 40,96 kHz (B1)✔️
✔️
2 kHz to 20 kHz according to IEC61000-4-7 via software option (B1)✔️
CCCI, SSH, HTTP(S)Modbus RTU & TCP (Standard)
✔️
IEC60870-5-104 (P1), IEC61850 (P2), Modbus Master (P3) MQTT*✔️
Radius, RBAC, URM, encryption✔️
1GB ~ 140 weeks with standard template1.7 inches
DIN-rail,
Front panel installation using adapter
160 x 90 x 58mm
L x W x HDirect and transducer measurement
100 / 230 / 400 / 690V1A/5A measuring transformer (C30)
1A/5A protection transformer (C30)
Rogowski coils (C40)
Sensor technology (C44)
DC (C45)
2 / 2
❌
❌
✔️
• Substations
• Industrial applications
• Grid code compliance
• High-precision frequency measurements
• Residual Current Monitoring (RCM)
Low-, medium- and high-voltage
✔️
10.24 kHz / Optional 40.96 kHz (B1)✔️
✔️
2 kHz to 20 kHz according to IEC61000-4-7 via software option (B1)✔️
CCCI, SSH, HTTP(S)Modbus RTU & TCP (Standard)
✔️
IEC60870-5-104 (P1), IEC61850 (P2), Modbus Master (P3) MQTT*✔️
Radius, RBAC, URM, encryption✔️
1GB ~ 140 weeks with standard template5 inches
Front panel installation
144 x 144
144 x 144 x 90 mm
L x W x HDirect and transducer measurement
Small signal transducer (E3)
1A/5A measuring transformer (C30)
1A/5A protection transformer (C30)
Rogowski coils (C40)
Mini current clamps (C44)
DC (C45)
8 / 4
✔️
5th current feeder (30mA)✔️
PT100 / PT1000 / KTY✔️
Power Quality Analysis Software
Suitable for PQI-LV
WebPQ®
The Easy Way to Analyse Your Power Quality Measurement Data
The new WebPQ® is the central analysis software for all fixed installed fault recorders, power quality monitoring devices and for the evaluation of the portable power quality analysers* from A. Eberle.
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