Square D PowerLogic CM4250 Circuit Monitor

The Square D PowerLogic CM4250 is a high-accuracy circuit monitor designed for comprehensive electrical measurement in commercial, industrial, and utility applications. This advanced monitoring device provides real-time measurement of voltage, current, power, energy, and power quality parameters, enabling facility managers and electrical engineers to optimize energy usage, improve system reliability, and reduce operating costs. The CM4250 is part of the Schneider Electric PowerLogic family of energy management solutions.

Key Features

• High-accuracy measurement: 0.2% revenue accuracy class

• Comprehensive power quality analysis including harmonics up to the 63rd order

• Built-in data logging for energy and demand trends

• Multiple communication options: Modbus, Ethernet, BACnet

• Digital and analog I/O for integration with control systems

• Integrated display for local viewing of measurements

Measurement Specifications

Power Quality Analysis

The CM4250 provides comprehensive power quality monitoring capabilities essential for diagnosing electrical system issues. It measures total harmonic distortion (THD), individual harmonic components, crest factor, and K-factor. The device records voltage sag and swell events, transient capture, and waveform recording for detailed analysis of power disturbances. These capabilities enable identification of power quality problems that can affect sensitive equipment and cause production interruptions.

Energy and Demand Management

Built-in data logging functionality enables long-term energy consumption tracking and demand analysis. The CM4250 records energy usage at configurable intervals, supporting time-of-use rate structures and demand response programs. The device calculates real-time demand values and can provide alarm outputs when demand thresholds are exceeded. Historical data can be retrieved for analysis of energy usage patterns and identification of energy saving opportunities.

Communication and Integration

The CM4250 offers flexible communication options for integration with building management systems, SCADA platforms, and energy management software. Standard Modbus RTU over RS-485 provides reliable connectivity for industrial applications. Optional Ethernet modules enable integration with IP-based networks, while BACnet support allows direct connection to building automation systems. The device supports multiple communication protocols simultaneously, enabling integration with diverse system architectures.

Applications

The PowerLogic CM4250 is suitable for a wide range of electrical monitoring applications:

• Main electrical service entrance monitoring

• Sub-metering for tenant billing and cost allocation

• Energy management and demand control systems

• Power quality monitoring for sensitive equipment protection

• Data center power monitoring

• Industrial facility electrical system analysis

• LEED certification and energy reporting

Environmental Specifications

• Operating Temperature: -25°C to 70°C (-13°F to 158°F)

• Storage Temperature: -40°C to 85°C (-40°F to 185°F)

• Relative Humidity: 5% to 95% non-condensing

• Protection Rating: IP40 (front), IP20 (rear)

• Altitude: Up to 3000 meters

Installation and Configuration

The CM4250 is designed for panel mounting with a standard 96 mm x 96 mm cutout. Voltage and current connections are made via rear terminals with secure wire retention. The device includes current transformer shorting blocks to simplify installation and maintenance. Configuration is performed through the front panel interface or via communication using configuration software. The device supports multiple wiring configurations including 3-phase 4-wire, 3-phase 3-wire, and single-phase systems.

Certifications

The PowerLogic CM4250 is certified to UL 61010-1 and CAN/CSA C22.2 No. 61010-1 for safety. It meets IEC 61000-4 electromagnetic compatibility standards and complies with ANSI C12.20 accuracy requirements for revenue metering applications. The device is manufactured under ISO 9001 quality management systems.