The PMC-33M-A Digital Multifunction Meter is CET’s latest offer for the low-cost digital power/energy metering market. Housed in a standard DIN form factor measuring 96x96x88mm, it is perfectly suited for industrial, commercial and utility applications. The PMC-33M-A  features quality construction, multifunction true RMS  measurements and a large, backlit, 7-segmant LCD. Compliance with the IEC 62053-22 Class 0.5S Standard, it is a cost effective replacement for analog instrumentation  that is  capable of displaying  3-phase  measurements at once.  It  optionally  provides four Digital Inputs for status monitoring, two Relay Outputs for control and alarm applications.  The standard RS-485 port and Modbus RTU protocol support makes the PMC-33M-A a smart metering component of an intelligent, multifunction monitoring solution for any Energy Management System.

Typical Applications

• Industrial, Commercial and Utility Substation Metering
• Building, Factory and Process Automation
• Sub-metering and Cost Allocation
• Energy Management and Power Quality Monitoring

Features Summary

Multifunction True RMS Measurements

• VLN, VLL per phase and Average
• Current per phase and Average with calculated Neutral Current
• kW, kvar, kVA, PF per phase and Total
• kWh, kvarh Import / Export / Net / Total and kVAh Total
• Frequency
• Device Operating Time (Running Hours)
• Optional DI Pulse Counters

Enhanced Measurements

• U and I THD, TOHD, TEHD and Individual Harmonics up to 31st
• Current TDD, TDD Odd, TDD Even, K-Factor and Crest Factor
• U and I Unbalance and Phase Angles
• Displacement PF
• Fundamental U, I and kW per phase
• Total Fundamental kW & Total Harmonic kW
• U and I Symmetrical Components
• kvarh Q1-Q4
• Demands, Predicted Demands and Peak Demands for kW/kvar/kVA Total and per phase Current with Timestamp for This Month (or Since Last Reset) and Last Month (or Before Last Reset)

Ease of use

• Large, backlit LCD display with wide viewing angle
• Intuitive user interface
• LED indicators for Energy Pulsing and Communication activities
• Password-protected setup via front panel or free PMC Setup software
• Easy installation with mounting clips, no tools required

Setpoints

• 9 user programmable setpoints with extensive list of monitoring parameters including Voltage, Current, Power , THD, … etc.
• Configurable thresholds, time delays and DO triggers

SOE Log

• 100 events time-stamped to ±1ms resolution
• Setup changes, Setpoint and DI status changes and DO operations Max/Min Log
• Max/Min Log with Timestamp for real-time measurements such as Voltage, Current, In, Freq., kW, kvar, kVA, PF, Unbalance, K-factor, Crest Factor and THD.
• Configurable for This Month/Last Month or Before/Since Last Reset

Diagnostics

• Frequency Out-of-Range, Loss of Voltage / Current
• kW Direction per phase and Total, Possible incorrect CT Polarity
• Incorrect U & I Phase Sequence

Communications

• Optically isolated RS485 port at max. 38,400 bps
• Standard Modbus RTU support

Real-time clock

• Battery-backed Real-Time Clock with 25ppm accuracy (<2s per day)

System Integration

• Supported by CET’s PecStar® iEMS and iEEM
• Easy integration into other Automation, SCADA or BMS systems via Modbus RTU

Inputs and Outputs

Digital Inputs (Optional)

• 4 channels, volts free dry contact, 24VDC internally wetted
• 1000Hz sampling for status monitoring with programmable debounce
• Pulse counting with programmable weight for each channel for collecting WAGES (Water, Air, Gas, Electricity, Steam) information

Digital Outputs (Optional)

• 2 Form A mechanical relays for alarming and general purpose control
• 5A @ 250VAC or 30VDC