Schneider Electric PM850 Introduction, Topics Not Covered In This Manual, What is a Power Meter?

63230-500-225A2	PowerLogicTM Series 800 Power Meter
3/2011	Chapter 1—Introduction

Chapter 1—Introduction

This user guide explains how to operate and configure a PowerLogic™ Series 800 Power Meter. Unless otherwise noted, the information contained in this manual refers to the following power meters:

•Power meter with integrated display

•Power meter without a display

•Power meter with a remote display

Refer to “Power Meter Parts and Accessories” on page 5 for all models and model numbers. For a list of supported features, see “Features” on page 7.

NOTE: The power meter units on the PM810, PM810U, and the PM810RD are functionally equivalent.

Topics Not Covered In This Manual

Some of the power meter’s advanced features, such as on-board data logs and alarm log files, can only be set up via the communications link using PowerLogic software. This power meter user guide describes these advanced features but does not explain how to set them up. For information on using these features, refer to your software’s online help or user guide.

What is a Power Meter?

A power meter is a multifunction, digital instrumentation, data acquisition and control device. It can replace a variety of meters, relays, transducers, and other components. This power meter is equipped with RS485 communications for integration into any power monitoring/control system and can be installed at multiple locations within a facility.

These are true rms meters, capable of exceptionally accurate measurement of highly non-linear loads. A sophisticated sampling technique enables accurate measurements through the 63rd harmonic➀. You can view over 50 metered values, plus minimum and maximum data, either from the display or remotely using software. Table 1–1summarizes the readings available from the power meter.

Table 1–1: Summary of power meter instrumentation

Real-time Readings		Power Analysis
• Current (per phase, residual, 3-Phase)		•	Displacement Power Factor (per phase, 3-Phase)
• Voltage (L–L, L–N, 3-Phase)		•	Fundamental Voltages (per phase)
• Real Power (per phase, 3-Phase)		•	Fundamental Currents (per phase)
• Reactive Power (per phase, 3-Phase)		•	Fundamental Real Power (per phase)
• Apparent Power (per phase, 3-Phase)		•	Fundamental Reactive Power (per phase)
• Power Factor (per phase, 3-Phase)		•	Unbalance (current and voltage)
•	Frequency	•	Phase Rotation
• THD (current and voltage)		•	Current and Voltage Harmonic Magnitudes and
			Angles (per phase)➀
		•	Sequence Components
Energy Readings		Demand Readings
•	Accumulated Energy, Real	•	Demand Current (per phase present, 3-Phase
•	Accumulated Energy, Reactive		avg.)
•	Accumulated Energy, Apparent	•	Average Power Factor (3-Phase total)
•	Bidirectional Readings	•	Demand Real Power (per phase present, peak)
• Reactive Energy by Quadrant		•	Demand Reactive Power (per phase present,
•	Incremental Energy		peak)
•	Conditional Energy	•	Demand Apparent Power (per phase present,
			peak)
		•	Coincident Readings
		•	Predicted Power Demands

➀Individual harmonics are not calculated in the PM810. The PM810 with PM810LOG, and the PM820, calculate distortion to the 31st harmonic. The PM850 and PM870 calculate distortion to the 63rd harmonic.

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