Main Documents
Description
iMeter 7A Advanced Power Quality Monitor
Device Introduction
iMeter 7A is one of CET’s latest Advanced PQ Analyzer designed for the compliance monitoring market as it offers unsurpassed functionality by combining Class 0.2S Accuracy and advanced PQ Features in a compact DIN 144 form factor with a stunning, high resolution, color TFT LCD display. The iMeter 7A complies with such standards as IEC62053-22 Class 0.2S, IEC61000-4-30 Ed. 3.1 Class A, IEC61000-4-15, IEC61000-4-7, EN50160, IEEE Std 519-2022 and IEC61850 for Substation Automation. Further, the iMeter 7A offers 4GB memory, dual 10/100BaseT Ethernet and one RS-485 ports as well as extensive I/O with 4xDI, 3xDO and optionally 2xSS Pulse Output, 2xAI or 2xRTD. These features likely make the iMeter 7A one of the most Advanced PQ Analyzers for an intelligent Power Quality Monitoring System. |
Product Highlight
- PQ monitoring at HV, MV and LV Utility Substations
- IEC 62053-22 Class 0.2S, IEC61000-4-30 Ed. 3.1 Class A Certified
- Data Centers, Semiconductor Fabs, Heavy Industries
- Renewable Energy Applications
- 7x24 Automated Manufacturing Facilities
- Dips/Swells/Interruptions, Transients, Flickers & Harmonics Monitoring
- Mains and critical feeder monitoring
- IEC 61850 support for Substation Automation and Smart Grid
- Retrofit applications with optional Class 1 Split-Core Current Probes (SCCPs)
Typical Application
- PQ monitoring at LV Utility Substations
- Data Centers, Semiconductor Fabs, Heavy Industries
- 7x24 Automated Manufacturing Facilities
- Dips, Swells, Interruptions, Transients, Flickers & Harmonics Monitoring
- Mains and Critical Feeder Monitoring
- IEC 61850 support for Substation Automation and Smart Grid
- Retrofit applications with optional Class 1 Split-Core Current Probes
Related Products
iMeter 5 Advanced Power Quality Monitor
iMeter 6 Advanced Power Quality Monitor
iMeter 8 Advanced Power Quality Monitor
iMeter D7 Advanced Power Quality Monitor
Specification
Technical Specification
VoltageInputs(V1,V2,V3,VN,V4,V4N) | |
| Standard Un | 400VLN/690VLL+20% |
| Range | 5V to 2Un for 400VLN nominal |
| Overload | 2xUn continuous,4xUn for 1s |
| Burden | <0.5VA/per phase |
| PT Ratio Primary Secondary V4 Primary V4 Secondary | 1 to 1,000,000 1 to 1,500 1 to 1,000,000 1 to 1,500 |
| Measurement Category | CAT III 1000V |
| Frequency | 40Hz-60Hz@50Hz,48Hz-72Hz@60Hz |
Current Inputs(·I11,I12,·I21,I22,·I31,I32,·I41,I42) | |
| Standard In | 5A(Standard),1A(Optional) |
| Range | 1% to 400% In |
| Starting Current | 0.1% In |
| Overload | 4xIn continuous,10xIn for 1s |
| Burden | <0.5VA/per phase @ 5A <0.1VA/per phase @ 1A |
| CT Ratio Primary Secondary I4 Primary I4 Secondary | 1 to 30,000 1 to 50 1 to 30,000 1 to 50 |
| SCCP Options SCCP-50A-500mV SCCP-200A-200mV SCCP-500A-500mV SCCP-5000-500mV | Split-Core Current Probe Input @ max. 500mV 5A/50A (In/Imax), max. 500mV Output 20A/200A (In/Imax), max. 200mV Output 500A Imax, max. 500mV Output Selectable 500A/5000A (Imax) Rogowski Coil, max. 500mV Output |
SCCT Options | PMC-SCCT-100A-40mA-16-A, Ø=16mm, Class 0.5 PMC-SCCT-200A-40mA-24-A, Ø=24mm, Class 0.5 PMC-SCCT-400A-40mA-35-A, Ø=35mm, Class 0.5 PMC-SCCT-800A-40mA-A, 80x50mm, Class 0.5 PMC-SCCT-1600A-40mA-A, 130x55mm, Class 0.5 |
SCCTA Option | PMC-SCCT-5A-2mA-16-A,Ø=16mm, Class 1 |
Power Supply(L+,N-) | |
Standard | 95-250VAC/VDC ± 10%, 47-440 Hz |
Optional | 20-60VDC |
| Burden | < 14VA/10W @ 250VAC/DC <6W @ 24VDC |
| Overvoltage Category | OVC III 300V |
Digital Inputs(DIC,DI1,DI2,DI3,DI4,DIC2,DI5,DI6,DI7,DI8) | |
Type | Dry contact,24VDC internally wetted |
Sampling | 1000Hz |
Hysteresis | 1ms minimum |
Digital Outputs(DO11,DO12,DO21,DO22,DO31,DO32,DO41,DO42) | |
Type | Form A Mechanical Relay |
Loading | 5A@250VAC or 30VDC |
Alarm Output(Alarm) | |
Loading | 5A @ 250VAC or 30VDC |
Optional Solid State Pulse Outputs(E1+,E1-,E2+,E2-) | |
Type | Form A Solid State Relay |
Isolation | Optical ***** |
Environmental Conditions | |
Operating Temp. | -25 °C to + 70°C |
Storage Temp. | -40 °C to + 85°C |
Humidity | 5% to 95% non-condensing |
Atmospheric Pressure | 70 kPa to 106 kPa |
Altitude | <2000m |
Location/Mounting | For indoor use only |
Mechanical Characteristics | |
Panel Cutout | 92x92mm(3.62”x3.62”) |
Unit Dimensions | 96x96x88mm |
IP Rating | IP65 |
Communications | |
Protocol | Modbus RTU, BACnet MS/TP, Metasys N2 and DNP3.0 |
RS-485 Port | 1+(1 Opt.) |
Features Summary | |
Display (Backlit) | Dot-Matrix LCD (Backlit) |
Type of Measurement | ULN per Phase &Avg. ULL per Phase&Avg. Current per Phase &Avg. Neutral Current (Meas./Calc.) Frequency kW per Phase & Total kvar per Phase & Total kVA per Phase& Total PF per Phase& Total kWh lmport/Export kvarh Import/Export kVAh Total |
Power Quality | THD Voltage & Current TOHD Voltage & Current TEHD Voltage & Current 2nd-31st Harmonics K-Factor Voltage/Current Unbalance |
Battery-backed Real-time Clock | √ |
Demands | Present , Predicted Demands and Max.Demands for This Month & Last Month |
Multi-Tariff TOU capability | Two TOU schedules, each providing: 12 Seasons 90 Holidays 20 Daily Profiles, each with 12 Periods in 15-minute interval 8 Tariffs |
Diagnostics | √ |
Setpoints | 9 Setpoints |
Logs | |
Max./Min.Log | This month & Last Month |
Freeze Logs(Optional) | 60 Daily Freeze Logs, 36 Monthly Freeze Logs |
Data Recorder(Optional) | 5 Data Recorders Max. Recording Depth @ 10000 records |
SOE Log | 100 entries |
On-board Log Memory | (4MB Opt.) |
Accuracy
| Parameters | Accuracy | Resolution |
|---|---|---|
| Voltage | ±0.2% | 0.001V |
| Current | ±0.2% | 0.001A |
| I4(measurement) | ±0.2% | 0.001A |
| P,Q,S | ±0.5% | 0.001kx |
| kWh,kVAh | IEC 62053-22 Class 0.5S ANSI C12.20 Class 0.2 EN 50470-1/3:2006 Class C | 0.1kXh |
| kvarh | IEC 62053-24 Class 0.5S IEC 62053-23 Class 2 | 0.1kvarh |
| PF | ±0.5% | 0.001 |
| Frequency | ±0.02Hz | 0.01Hz |
| THD | IEC 61000-4-7 Class B | 0.001% |
| K-Factor | IEC 61000-4-7 Class B | 0.001 |
| Phase Angle | ±1° | 0.1° |
Standards of Compliance
Safety Requirements | |
|---|---|
| CE LVD 2014/35/EU | EN 61010-1: 2010 EN 61010-2-030: 2010 |
| Electrical Safety in Low Voltage Distribution Systems up to 1000Vac and 1500Vdc | IEC 61557-12:2018(PMD) |
| Insulation AC Voltage: 2kV@1 minute Insulation Resistance: >100MΩ Impulse Voltage: 6kV,1.2/50µs | IEC 62052-31:2015 |
Electromagnetic Compatibility CE EMC Directive 2014/30/EU(EN 61326:2013) | |
Immunity Tests | |
| Electrostatic Discharge | EN 61000-4-2:2009 |
| Radiated Fields | EN 61000-4-3:2006+A1:2008+A2:2010 |
| Fast Transients | EN 61000-4-4:2012 |
| Surges | EN 61000-4-5:2014+A1:2017 |
| Conducted Disturbances | EN 61000-4-6:2014 |
| Magnetic Fields | EN 61000-4-8:2010 |
| Voltage Dips and Interruptions | EN 61000-4-11:2004+A1:2017 |
| Ring Waves | EN 61000-4-12:2017 |
Emission Tests | |
| Limits and Methods of Measurement of Electromagnetic Disturbance Characteristics of Industrial,Scientific and Medical(ISM) Radio-Frequency Equipment | EN 55011:2016 |
| Limits and Methods of measurement of Radio Disturbance Characteristics of Information Technology Equipment | EN 55032:2015 |
| Limits for Harmonic Current Emissions for Equipment with Rated Current≤16A | EN 61000-3-2:2014 |
| Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems for Equipment with Rated Current≤16A | EN 61000-3-3:2013 |
| Emission Standard for Residential, Commercial and Light-Industrial Environments | EN 61000-6-4:2007+A1:2011 |
RED (Radio Equipment Directive) | |
| Assessment of Electronic and Electrical Equipment Related to Human Exposure Restrictions for Electromagnetic Fields (0Hz - 300 GHz) | EN/IEC 62311: 2020 |
| Short Range Devices (SRD) Operating in the Frequency Range 25 MHz to 1000MHz | ETSI EN 300 220-1V3.1.1: 2017 ETSI EN 300 220-2 V3.1.1: 2017 |
| Audio/Video, Information and Communication Technology Equipment -Part 1: Safety Requirements | IEC 62368-1: 2018 |
Mechanical Tests | |
| Spring Hammer Test | IEC 62052-11:2003 |
| Vibration Test | IEC 62052-11:2003 |
| Shock Test | IEC 62052-11:2003 |
Wiring Mode
Wiring Mode | |
|---|---|
| 3P4W | 3-Phase 4-Wire Wye Direct Connection with 3CTs 3-Phase 4-Wire Wye Direct Connection with 4CTs 3-Phase 4-Wire Wye with 3PTs and 3CTs 3-Phase 4-Wire Wye with 3PTs and 4CTs |
| 3P3W | 3-Phase 3-Wire Direct Delta Connection With 3CTs 3-Phase 3-Wire Direct Delta Connection with 2CTs 3-Phase 3-Wire Delta with 2PTs and 3CTs 3-Phase 3-Wire Delta with 2PTs and 2CTs |
| 1P3W | 1-Phase 3-Wire Direct Connection with 2CTs |
| 1P2W L-N | 1-Phase 2-Wire, Uln Direct Connection with 1CT |
| 1P2W L-L | 1-Phase 2-Wire, Ull Direct Connection with 1CT |