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GE Energy
Instruction Manual
Software Revision: 1.17
Manual P/N: 1601-0038-A1
Manual Order Code: GEK-113637
Copyright © 2012 GE Digital Energy
GE Digital Energy
215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: (905) 294-6222 Fax: (905) 201-2098
Internet:
http://www.gedigitalenergy.com
*1601-0215-A1*
EPM 6010 Multi-function Power
Chapter 1:
Metering System
I I SO 9001
GE Digital Energy's Quality
Management System is
registered to ISO9001:2000
QMI # 005094
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Related Manuals for GE Multilin EPM 6010
Summary of Contents for GE Multilin EPM 6010
- Page 1 Metering System Chapter 1: Instruction Manual Software Revision: 1.17 Manual P/N: 1601-0038-A1 Manual Order Code: GEK-113637 Copyright © 2012 GE Digital Energy GE Digital Energy I I SO 9001 215 Anderson Avenue, Markham, Ontario Canada L6E 1B3 GE Digital Energy's Quality...
- Page 2 General Safety Precautions Note • Failure to observe and follow the instructions provided in the equipment manual(s) could cause irreversible damage to the equipment and could lead to property damage, personal injury and/or death. • Before attempting to use the equipment, it is important that all danger and caution indicators are reviewed.
- Page 3 Safety Words and Definitions The following symbols used in this document indicate the following conditions: Indicates a hazardous situation which, if not avoided, will result in death or serious Note injury. Indicates a hazardous situation which, if not avoided, could result in death or serious Note injury.
- Page 5 Table of Contents THREE-PHASE SYSTEM CONFIGURATIONS ................1-1 1: THREE-PHASE ......................1-1 POWER ONNECTION ......................1-3 MEASUREMENT ELTA ONNECTION ’ ......... 1-5 LONDELL HEOREM AND HREE HASE EASUREMENT POWER, ENERGY AND DEMAND ....................1-8 ..........................1-10 EMAND REACTIVE ENERGY AND POWER FACTOR ................1-12 ................
- Page 6 (9) C ) ............4-17 URRENT EASUREMENT HASE (10) C ) ..........4-18 URRENT EASUREMENT INGLE HASE EPM6010 COMMUNICATION ...................... 5-1 5: COMMUNICATION DA C ..................... 5-1 INSTALLATION OMMUNICATION CONFIGURING THE EPM6010 METER ..................5-3 ..................5-10 ESETTING THE THERNET EPM6010T TRANSDUCER COMMUNICATION AND PROGRAMMING OVERVIEW .
- Page 7 APPENDIX C: DNP INTRODUCTION ..........................C-1 MAPPING FOR DNP MAPPING (DNP-1 TO DNP-2) .................... C-2 EPM6010 DNP IMPLEMENTATION ......................... D-1 APPENDIX D: DNP 3.0 DATA LINK LAYER ........................... D-2 PROTOCOL TRANSPORT LAYER ......................... D-3 ASSIGNMENTS FOR APPLICATION LAYER ........................D-4 EPM6010 .....................
- Page 8 TOC–4 EPM 6010 MULTI-FUNCTION POWER METERING SYSTEM – USER GUIDE...
- Page 9 Digital Energy EPM 6010 Multi-function Power Metering System Chapter 1: Three-Phase Power Measurement Three-Phase Power Measurement This introduction to three-phase power and power measurement is intended to provide only a brief overview of the subject. The professional meter engineer or meter technician should refer to more advanced documents such as the EEI Handbook for Electricity Metering and the application standards for more in-depth and technical coverage of the subject.
- Page 10 CHAPTER 1: THREE-PHASE POWER MEASUREMENT FIGURE 1–1: Three-phase Wye winding The three voltages are separated by 120 electrically. Under balanced load conditions with unity power factor the currents are also separated by 120 . However, unbalanced loads and other conditions can cause the currents to depart from the ideal 120 separation.
- Page 11 CHAPTER 1: THREE-PHASE POWER MEASUREMENT The following table indicates the common voltages used in the United States for wye connected systems. Table 1–1: Common Phase Voltages on Wye Services Phase-to-Ground Voltage Phase-to-Phase Voltage 120 volts 208 volts 277 volts 480 volts 2400 volts 4160 volts 7200 volts...
- Page 12 CHAPTER 1: THREE-PHASE POWER MEASUREMENT FIGURE 1–3: Three-phase Delta Winding Relationship In this example of a delta service, three wires will transmit the power to the load. In a true delta service, the phase-to-ground voltage will usually not be balanced because the ground is not at the center of the delta.
- Page 13 CHAPTER 1: THREE-PHASE POWER MEASUREMENT 120 V 120 V FIGURE 1–5: Three-Phase, Four-Wire Delta Phasors 1.1.3 Blondell’s Theorem and Three Phase Measurement In 1893 an engineer and mathematician named Andre E. Blondell set forth the first scientific basis for poly phase metering. His theorem states: •...
- Page 14 CHAPTER 1: THREE-PHASE POWER MEASUREMENT In modern digital meters, Blondell's Theorem is still applied to obtain proper metering. difference in modern meters is that the digital meter measures each phase voltage and current and calculates the single-phase power for each phase. The meter then sums the three phase powers to a single three-phase reading.
- Page 15 CHAPTER 1: THREE-PHASE POWER MEASUREMENT power flow in three wires. This will require three voltage coils and three current coils (a three element meter). Similar figures and conclusions could be reached for other circuit configurations involving delta-connected loads. EPM 6010 MULTI-FUNCTION POWER METERING SYSTEM – USER GUIDE 1–7...
- Page 16 CHAPTER 1: THREE-PHASE POWER MEASUREMENT Power, Energy and Demand It is quite common to exchange power, energy and demand without differentiating between the three. Because this practice can lead to confusion, the differences between these three measurements will be discussed. Power is an instantaneous reading.
- Page 17 CHAPTER 1: THREE-PHASE POWER MEASUREMENT The data from Figure 1-7 is reproduced in the table below to illustrate the calculation of energy. Since the time increment of the measurement is one minute and since we specified that the load is constant over that minute, we can convert the power reading to an equivalent consumed energy reading by multiplying the power reading times 1/60 (converting the time base from minutes to hours).
- Page 18 CHAPTER 1: THREE-PHASE POWER MEASUREMENT Figure 1-8 shows another example of energy and demand. In this case, each bar represents the energy consumed in a 15-minute interval. The energy use in each interval typically falls between 50 and 70 kWh. However, during two intervals the energy rises sharply and peaks at 100 kWh in interval number 7.
- Page 19 CHAPTER 1: THREE-PHASE POWER MEASUREMENT Intervals (15 mins.) FIGURE 1–8: Energy Use and Demand Intervals As seen in this example, it is important to recognize the relationships between power, energy and demand in order to effectively control loads or to correctly monitor use. EPM 6010 MULTI-FUNCTION POWER METERING SYSTEM –...
- Page 20 CHAPTER 1: THREE-PHASE POWER MEASUREMENT Reactive Energy and Power Factor 1.3.1 Real, Reactive, and Apparent Power The real power and energy measurements discussed in the previous section relate to the quantities that are most used in electrical systems. But it is often not sufficient to only measure real power and energy.