Inputs
The following data are required to implement the Energy Efficiency Compliance application.
Electrical Measurements
The following electrical measurements are collected at each point of interest in the electrical distribution, from Medium Voltage, to Low Voltage, down to Final Distribution.
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Power values (kW, kVAR, kVA)
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Energy values (kWh, kVARh, kVAh)
The following devices can provide these data in line with IEC 61557-12 and IEC 60364-8-1, as well as a measurement plan according to ISO 50001.
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Class 0.1 or class 0.2 devices (as per IEC 61557-12) such as PowerLogic ION9000 or PM8000 are recommended for high-accuracy applications.
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Class 0.5 or class 1 metering devices such as the embedded metering in the MasterPacT MTZ, PowerLogic PM5000, HDPM6000, PowerTag, and Acti9 iEM3000 are recommended for low voltage feeders and sub-distribution to measure power and energy.
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Metering devices with an accuracy below performance class 1 (the embedded MicroLogic trip unit in the ComPacT NSX circuit breaker, etc.) are acceptable for sub-distribution and load circuits for cost optimization purposes.
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Other electrical equipment such as MV protection relays (PowerLogic P5/P3, etc.), UPSs (Galaxy VX/VL/VM/VS, etc.), Power Factor controllers (PowerLogic PFC, AccuSine EVC+, etc.), can provide energy measurements that can contribute to an overall energy efficiency compliance program.
Other Utility Consumption Inputs
The following utilities can be monitored:
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Water
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Air
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Gas
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Steam or heat flow
They can be acquired via digital/analog inputs on meters or directly via Modbus from third-party devices.
Energy Driver Data
Any data which might have an impact on energy consumption should be leveraged.
For example:
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Weather information (outside temperature, humidity, etc.)
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Production volumes (number of units, tons, etc.)
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Hours of operation and operation schedules (work hours, weekdays vs weekends, seasons, shifts, etc.)
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Base loads
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Building occupancy
These can be acquired via digital/analog inputs on meters or directly via Modbus from third-party devices. They can also be imported in EcoStruxure Power Monitoring Expert from customer systems through OPC * or ETL*.
Production Variables
To correlate energy consumption with the different production variables such as equipment states, processes, production lines, products produced, shifts, etc., these production variables must be monitored, recorded, and used to normalize the respective energy consumption.
Examples:
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Process batch A/B/C/
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Product X/Y/Z produced on which machine during which shift
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Equipment in normal/maintenance mode
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Motor low/medium/high speed
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Generator starting/running/stopped
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ATS in normal/test/emergency mode
These can be imported in EcoStruxure Power Monitoring Expert or Power Operation from customer production systems through OPC* or ETL*
Alternatively, these can be acquired via digital/analog inputs on meters or directly via Modbus from third-party devices.
Tariffs (User Inputs)
To convert energy consumption into cost, it is necessary to apply the relevant tariffs to the power/energy consumption values.