POWER MEASUREMENT 3720 ACM – Advanced Power Quality Monitoring | ION Series Platform
Engineering Background
The POWER MEASUREMENT 3720 ACM is a high-accuracy, multi-function power quality analyzer developed under Schneider Electric’s ION Series platform. Designed for mission-critical industrial and commercial power monitoring applications, the 3720 ACM delivers true RMS measurements, harmonic analysis, and real-time energy data acquisition across three-phase electrical systems. It is widely deployed in substations, data centers, manufacturing facilities, and utility metering infrastructure where power quality visibility is non-negotiable.
Product Positioning
The 3720 ACM occupies the mid-to-high tier of the ION Series lineup, bridging the gap between basic revenue-grade meters and full-featured power quality recorders. It is the preferred choice for procurement engineers who require IEC 61000-4-30 Class A-equivalent measurement fidelity, Modbus RTU/TCP communications, and seamless integration with SCADA and EMS platforms — all within a compact DIN-rail or panel-mount form factor.
Complete Technical Specifications
| Model | 3720 ACM |
| Manufacturer | Power Measurement (Schneider Electric) |
| Series / Platform | ION Series |
| Measurement Class | Revenue-grade / Class 0.5S (IEC 62053-22) |
| Input Voltage (L-N) | 57.7 – 347 V AC (direct); up to 765 kV via PT |
| Input Current | 1 A or 5 A CT secondary (nominal) |
| Frequency | 45 – 65 Hz |
| Power Accuracy | ±0.1% of reading (active energy) |
| Harmonic Analysis | Up to 63rd harmonic (V & I) |
| Communications | Modbus RTU (RS-485), Modbus TCP/IP (optional) |
| Digital I/O | 4 digital inputs / 2 digital outputs (relay) |
| Display | Backlit LCD, multi-screen navigation |
| Data Logging | Internal memory for trend logs, waveform capture, and event records |
| Auxiliary Power | 85 – 265 V AC / 100 – 300 V DC |
| Operating Temperature | -25°C to +70°C |
| Enclosure / Mounting | Panel-mount (96 × 96 mm cutout) / DIN-rail adapter available |
| Weight | 1,260 g |
| Certifications | CE, UL, CSA, IEC 61010-1 |
| Country of Origin | Canada / USA (Power Measurement Ltd.) |
Proven Application Environments
- Utility Substation Metering – Revenue-grade billing and settlement at grid interconnection points
- Industrial Plant Power Management – Real-time load profiling, demand management, and power factor correction in heavy manufacturing
- Data Center & Critical Facility Monitoring – Continuous power quality surveillance to protect sensitive IT loads
- Renewable Energy Integration – Grid-tie monitoring for solar, wind, and co-generation systems
- Building Automation & EMS – Sub-metering for energy cost allocation and ISO 50001 compliance reporting
- Oil & Gas / Petrochemical – Hazardous-area adjacent monitoring with robust EMC performance
Engineering Advantages
- True RMS Accuracy – Captures non-sinusoidal waveforms accurately, critical for VFD-heavy environments
- ION Technology Framework – Programmable logic engine allows custom calculations, setpoints, and alarming without external PLC
- Harmonic Distortion Reporting – Per-phase THD and individual harmonic magnitudes up to the 63rd order for IEEE 519 compliance audits
- Waveform Capture – Triggered oscillography for fault analysis and power quality event investigation
- Open Protocol Communications – Native Modbus RTU/TCP ensures plug-and-play integration with Wonderware, Ignition, OSIsoft PI, and all major SCADA platforms
- Wide Auxiliary Supply Range – Single SKU operates on both AC and DC auxiliary power, simplifying global procurement
System Architecture & Signal Flow
The 3720 ACM employs a three-phase, four-wire measurement topology. Voltage inputs are connected directly (or via VTs) to the meter’s voltage terminals, while current inputs are fed from external CTs into the 1 A or 5 A current input terminals. The onboard DSP samples all six input channels simultaneously at high frequency, computing true RMS values, active/reactive/apparent power, power factor, frequency, and harmonic spectra in real time. Processed data is stored in internal non-volatile memory and made available via the RS-485 Modbus RTU port or optional Ethernet module. The ION programming framework allows the meter to execute conditional logic — for example, triggering a relay output when demand exceeds a setpoint — without requiring an external controller.
Sourcing & Quality Verification
- All units sourced through authorized Power Measurement / Schneider Electric distribution channels or verified surplus inventory with full traceability
- Each unit undergoes incoming inspection: visual check, label verification (model, serial, firmware revision), and functional power-on test
- Original factory documentation (datasheet, instruction bulletin) available upon request
- Warranty: 12-month Konmask.com operational warranty; factory warranty terms apply to new-in-box units
- Counterfeit-prevention: serial numbers cross-referenced against manufacturer records where applicable
Procurement Process
- Confirm Compatibility – Verify CT ratio, VT ratio, auxiliary supply voltage, and communication protocol against your system design
- Request a Quote – Contact support@konmask.com for volume pricing, lead time, and availability confirmation
- Place Order – Secure checkout via Konmask.com; purchase orders accepted for qualified accounts
- Shipping – DHL / FedEx international express; EXW Xiamen or CIF destination available; typical lead time 3–7 business days
- After-Sales Support – Technical commissioning guidance, firmware documentation, and Modbus register maps provided post-delivery
Technical FAQ
Q: Is the 3720 ACM the same as the ION 7300 series?
A: The 3720 ACM predates the ION 7300 branding but shares the same ION technology core. It is functionally equivalent for most Modbus-based SCADA integrations.
Q: Can the 3720 ACM measure 4-wire (3P+N) systems?
A: Yes. It supports 3-phase 4-wire wye, 3-phase 3-wire delta, and single-phase configurations via front-panel setup.
Q: What Modbus register map applies?
A: The standard Power Measurement ION Modbus map applies. Register documentation is available from Schneider Electric’s technical library and will be provided with your order.
Q: Is a configuration software required for commissioning?
A: Basic commissioning (CT/VT ratios, communication address) can be performed via the front-panel keypad. Advanced ION programming requires ION Setup software (free download from Schneider Electric).
Q: Do you offer calibration certificates?
A: Factory calibration certificates are available for new-in-box units. Third-party NIST-traceable calibration can be arranged upon request.
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