This document discusses basics of energy metering and fraud detection. It covers types of single-phase and three-phase energy meters, testing of meters in laboratories and at field sites, and different types of tampering in energy meters. The contents include basics of power measurement in AC circuits, types of single-phase meters like induction and electronic meters, testing routines for single-phase meters in the lab, field testing of single-phase meters, types of three-phase meters, field and lab testing of three-phase meters, common tampering methods like potential link open and current bypass, and references.
Why test on site? The utility wants to receive full payment for the services it provides. The customer wants to be billed fairly to get the lowest bill possible. This set of infographics is to facilitate the understanding of the need to test electricity meters and practically show how testing should be done. Intended for technicians, engineers, students, utilities staff and all interested in reliable energy measurement. Many definitions and examples are simplified to get clear way of reliable test results obtaining. Although the author tried to avoid errors, they can probably be found in the content, hence any comments are welcomed.
Why test on site? The utility wants to receive full payment for the services it provides. The customer wants to be billed fairly to get the lowest bill possible. This set of infographics is to facilitate the understanding of the need to test electricity meters and practically show how testing should be done. Intended for technicians, engineers, students, utilities staff and all interested in reliable energy measurement. Many definitions and examples are simplified to get clear way of reliable test results obtaining. Although the author tried to avoid errors, they can probably be found in the content, hence any comments are welcomed.
A smart meter is an electronic device
that records information such as
consumption of electric energy, voltage
levels, current, and power factor. Smart
meters communicate the information to
the consumer for greater clarity of
consumption behavior, and electricity
suppliers for system monitoring and
customer billing.
A switchgear or electrical switchgear is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system. Assembly of such devices in a logical manner forms a switchgear. This is the very basic definition of switchgear.
⋗To get more with details
https://www.youtube.com/channel/UC2SvKI7eepP241VLoui1D5A
Four quadrant metering can be used to understand individually or collectively:
Real Power consumed by the end user
Apparent Power delivered by the utility
Real Power delivered to the utility by an end user’s generation source
Apparent Power generated by the end user’s generation source
Having these measurements allows for the calculation of Reactive Power, VA and VARS as well as providing kWh for billing purposes.
Wide area monitoring systems (WAMS) are essentially based on the new data acquisition technology of phasor measurement and allow monitoring transmission system conditions over large areas in view of detecting and further counteracting grid instabilities.
Power Quality
Introduction
Power Quality Problems
Power Quality Measurement Devices
Power Quality Terminology
Power Quality Standards
Unbundled Power Quality Services
Power Quality Monitoring
Benefits of Power Quality
Conclusion
References
A smart meter is an electronic device
that records information such as
consumption of electric energy, voltage
levels, current, and power factor. Smart
meters communicate the information to
the consumer for greater clarity of
consumption behavior, and electricity
suppliers for system monitoring and
customer billing.
A switchgear or electrical switchgear is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system. Assembly of such devices in a logical manner forms a switchgear. This is the very basic definition of switchgear.
⋗To get more with details
https://www.youtube.com/channel/UC2SvKI7eepP241VLoui1D5A
Four quadrant metering can be used to understand individually or collectively:
Real Power consumed by the end user
Apparent Power delivered by the utility
Real Power delivered to the utility by an end user’s generation source
Apparent Power generated by the end user’s generation source
Having these measurements allows for the calculation of Reactive Power, VA and VARS as well as providing kWh for billing purposes.
Wide area monitoring systems (WAMS) are essentially based on the new data acquisition technology of phasor measurement and allow monitoring transmission system conditions over large areas in view of detecting and further counteracting grid instabilities.
Power Quality
Introduction
Power Quality Problems
Power Quality Measurement Devices
Power Quality Terminology
Power Quality Standards
Unbundled Power Quality Services
Power Quality Monitoring
Benefits of Power Quality
Conclusion
References
This report gives a comprehensive overview of the potential benefits of the smart meters and how they can save billions of rupees to Pakistan over a short period of time. Furthermore, it convinces the reader how the world is actively allocating its resources towards smart meters and how Pakistan is in desperate need of efficient use of energy which can only be facilitated b smart meters.
Why test on site? The utility wants to receive full payment for the services it provides. The customer wants to be billed fairly to get the lowest bill possible. This set of infographics is to facilitate the understanding of the need to test electricity meters and practically show how testing should be done. Intended for technicians, engineers, students, utilities staff and all interested in reliable energy measurement. Many definitions and examples are simplified to get clear way of reliable test results obtaining. Although the author tried to avoid errors, they can probably be found in the content, hence any comments are welcomed.
In this presentation, you will learn the basics - differences between self contained and transformer or instrument rated meter sites, transformer rated meter forms, test switches and CT's, meter accuracy testing in the field, checking the health of your CT's and PT's, and site verification
This presentation discusses:
- Best practices regarding the need to ensure that all transformers used for metering circuits are properly sized
- The ability to optimize revenue regardless of customer usage over time
- Best practices to ensure that transformers and meters have been installed correctly in the field and continue to perform in the same fashion
- Best practices for certifying the accuracy class of the transformers and how to best set up a shop testing and field testing/verification program.
- What the costs of implementing such a system and what the costs of not implementing such a system can be.
HIOKI POWER QUALITY ANALYZER PQ3198, PQ3100
IEC61000-4-30 Ed.2 Class A Power Quality Analyzer
• Advanced monitoring and recording
POWER QUALITY ANALYZER PQ3198
Hioki portable power meters and analyzers are best in class power measuring instruments for measuring single to three-phase lines with a high degree of precision and accuracy. The new and improved PQ3198 is a power quality analyzer for monitoring and recording power supply anomalies, allowing their causes to be quickly investigated, and also for assessing power supply problems such as voltage drops, flicker, harmonics, and other electrical issues. New features include the ability to drive current sensors straight from the PQA and enhanced recording capabilities.
https://www.n-denkei.com/singapore/inquiry/
HIOKI’s Next Generation Automotive Measurement Solutions
Fast Charging Stations
Power Conversion of Power Systems
Energy Consumption Assessment Tests
Compliance Testing of Batteries
Test High-voltage Battery Packs
Automotive Electronics
Record ECU Signals
Test Electrical Characteristics of Auto Parts
Essential Tools for On-site Maintenance
Wireless Power Transmission Evaluation System
https://www.n-denkei.com/singapore/inquiry/
This presentation covers why meters are tested and the type of tests that are performed on meters. An overview of field test methods and field equipment is also included. 01/28/2019
This presentation will cover the basics and differences between self-contained and transformer or instrument rated meter sites. Also discussed are transformer rated meter forms, test switches and CT's, Blondel's Theorem and why this matters to metering, meter accuracy testing in the field, checking the health of your CT's and PT's, and Site Verification (and not just meter testing).
Learn the differences between self-contained and transformer or instrument rated meter sites, test switches and CTs, Blondel’s Theorem, meter accuracy testing, site verification, and more! This presentation was given at MEUA Meter School. 03.03.20
This presentation covers the differences between self contained and transformer or instrument rated meter sites, transformer rated meter forms, test switches and CT's, Blondel's Theorem and why it matters to metering, meter accuracy testing in the field, checking the health of your CT's and PT's, and site verification (not just meter testing).
In this presentation, the topics covered include: differences between self contained and transformer or instrument rated meter sites; transformer rated meter forms; test switches and CT's; Blondel's Theorem and why this matters to us in metering; meter accuracy testing in the field; checking the health of your CT's and PT's; and site verification. This presentation was given at the Mississippi Electric Meter School on October 10, 2018.
In this presentation, the topics covered include: differences between self contained and transformer or instrument rated meter sites; transformer rated meter forms; test switches and CT's; Blondel's Theorem and why this matters to us in metering; meter accuracy testing in the field; checking the health of your CT's and PT's; and site verification.
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2. CONTENTS
Basics of energy meters
Types of 1-phase Energy Meters
Testing of 1-phase Energy Meter at Laboratory & Field
Types of 3-phase Energy Meters
Testing of 3-phase Energy Meters at field & Laboratory
Different Types of Tampering in Energy Meters
References
4. Power in ac circuits....a quick recap
Power per phase is
P=VPIP cos(φ)
Power for all 3- phases is
P=3VPIP cos(φ) or
P=V1I1 cos(φ1) + V2I2 cos(φ2) + V3I3 cos(φ3)
Since for a Balanced Load Power is Constant ,So
P(t) = 3VPIP cos(φ) also
Power in terms of Line quantity
P= √3 VLIL cos(φ)
2
5. TYPES OF 1-φ ENERGY METERS
1.EM induction kWh meter
2.Electronic counter/Hybrid Type 3.Electronic multifunction
kWh Meter
3
8. The routine tests carried out in the Utility’s laboratory are:
1. Long period dial test
2. Non-registration with voltage alone-creep test
3. Starting current test
(1) The long period dial test is done with the help of R.S. S
(Reference sub-standard) meter.
The meters are started and stopped simultaneously after
connecting to the same load for a fixed period of say half
an hour.
Then,
Percent error = (R – A )/R x 100
R = Energy recorded by kWh meter under test
A = R. S.S. meter
ROUTINE TESTS:-
6
10. 1-phase Meter Testing at site:-
Apart from testing and calibrating the meters, they must be
properly installed, as per the connection diagram.
After installation of meter, its performance should be checked
at site also.
Let us take 100 watt lamp (resistive load and time constant of
energy meter is 2400 rev. /kWh.
Assuming normal supply voltage, the consumption in one hour
will be 100 watt hours. The meter disc should therefore rotate
(a) (2400 x 100)/1000 = 240rev./hour.
Therefore, time taken for one revolution is
(60 x 60)/240 = 15 seconds.
8
11. TYPES OF 3-φ ENERGY METERS:-
1. Whole Current Meter
2. LT CT Operated Meter
3. HT Meter
9
12. 3-Phase Meter Testing at Site:-
All the meter details (sl. No., rating etc.) re noted down to
know whether the capacity of the installed meter is suitable
for the connected load of the consumer.
Meter reading is taken starting from date , time and all
parameters including instantaneous parameters, tamper
data etc. From these data the present status of the meter is
ascertained.
Further Meter reading instrument(MRI) is connected to the
communication port of the meter. The reference standard
(Standard Meter) is connected in series with the meter to
find out the accuracy of the meter. With the help of clamp
meter the current & voltage of all phases at the meter
terminal is compared with the MRI data & meter display
data. Subsequently from these data the instantaneous load
drawn by the consumer is measured & compared. In case of
consumer owned transformer the load of the transformer
secondary side is checked and compared with that of the
meter to ascertain correct recording of energy. 10
13. Further Meter reading instrument (MRI) is connected to the
communication port of the meter. The reference standard
(Standard Meter) is connected in series with the meter to find
out the accuracy of the meter. With the help of clamp meter the
current & voltage of all phases at the meter terminal is compared
with the MRI data & meter display data. Subsequently from these
data the instantaneous load drawn by the consumer is measured
& compared. In case of consumer owned transformer the load of
the transformer secondary side is checked and compared with
that of the meter to ascertain correct recording of energy
11
14. TAMPERING:-Any intentional action on the metering system by
consumer or his agent , So as to record the Consumption Lower than Actual.
TAMPER DETECTION AND LOGGING:-
•Meter analyses the electrical parameters and their relationships to make a
judgement whether this is a situation , which may happen due to normal load
condition or is artificially caused.
•Tamper detection logics can be as powerful as application knowledge and it’s
appropriate implementation in s/w. Some tamper detection needs special hardware
support also.
4th
current sensor and support circuit
Magnetic field detection
Meter cover open detection
12
17. Common Tampering Method(1):-
•Open link/make it loose, on TB
or inside Meter cover
•Voltage coil/Sensor not getting
Voltage
•Meter stops ,No recording
•Consumer Continues to get
Power
•Missing Potential Tamper.
Some Common Tampering methods are given below:-
15
19. Common Tampering Method(3):-
Stop the disk rotation by
blocking it, like wire, film
Sticky materials on
bearings, makes it slow,
eventually may stop.
No Recording for the
duration of Tamper
Change the counter readings by removing meter glass
17
20. Common Tampering Method(4):-
Interchange in & out wire of
the meter.
Meter count will
decrement,if no reverse
stop,else stop incrementing.
Consumer continues to get
supply,but not recorded
Current reversal or CT
reverse tamper
18
21. Common Tampering Method(5):-
By Pass
Strong shunt in meter to bypass most of the current
New Electronic single phase Meter
19
23. References:
MRT Laboratory, CESU,odisha.
"Handbook for Electricity Metering" by The Edison Electric Institute
—The Bible of electricity meters, continuously updated since
electricity was discovered.
http://tdworld.com/smart-grid/india-spend-216-billion-smart-grid-
infrastructure-2025
“People Who Steal Edison’s electricity” Daily Yellowstone journal.
March 27, 1886. Retrieved 2016-07-09.
http://www.prnewswire.com/news-releases/world-loses-893-billion-
to-electricity-theft-annually-587-billion-in-emerging-markets-
300006515.html
21