Understanding power quality and its importantce

UNDERSTANDING POWER QUALITY AND ITS
IMPORTANCE
www.messungelectricalengineering.com

INTRODUCTION - MESSUNG SYSTEMS PVT LTD
• Messung started its journey in 1981.
• For nearly four decades, Messung has been at the forefront of
industrial automation in India.
• Today, our portfolio and prowess extends far beyond this field to
Home, Office & Hotel Automation, Building & Infrastructure
Automation, Power Distribution, Workplace Ergonomics, Electronic
Assembly and Test & Measuring.

OUR BUSINESSES

• What is Power Quality and why you
should care
• Power Quality Disturbances
• Power Quality Monitoring
• Janitza Products Overview
CONTENTS

BASIC CONCEPT OF AN ELECTRICITY
• An Electricity is a fuel which is required for any Electrical
equipment to operate in its intended manner.
• Unusual Commodity
• Required as a continuous flow.
• Cannot be conveniently stored in a quantity.
• Electric Power: It is a Rate at which work is done.
• P = V X I X COSØ…………………For AC Circuits
• P = V X I ………………………….For DC Circuits
• Electric Energy: when power is applied for certain duration
of time, an energy gets consumed by an equipment.
• Every equipment is designed to operate on certain rated
conditions, these conditions are mentioned on the
Nameplate of an equipment.

PERFECT AND NON PERFECT GRID
PERFECT GRID
TIME
AMPLITUDE
VOLTAGE WAVEFORM
CURRENT WAVEFORM
3
NON PERFECT GRID
AMPLITUDE
TIME

WHAT IS POWER QUALITY AND
WHY YOU SHOULD CARE
• Power Quality
• "The concept of powering and grounding sensitive
equipment in a manner that is suitable to the
operation of that equipment."
• Electronic equipment & controls are increasing
• System control and energy efficiency is a priority
• The modern power grid is changing
• High dependence on reliable electrical systems
• Some Facilities operate 7 days a week, 24 hours a
day
• Many facilities have high cost of downtime

CONSEQUENCES
• Energy efficiency and Power Quality is
increasingly a concern of organizations
• Maintaining Power Quality to the level that is
required by the application enables safe
operation and reduces costly downtime.
• Power failure, malfunction, overheating,
flickering light, energy waste, etc.

POWER QUALITY STANDARDS
Characteristics of the voltage (PQ) in public
electricity supply networks
Recommended practices and requirements for
Harmonics Control in Electrical Power Systems
Electromagnetic compatibility (EMC): Ambient
conditions; compatibility level for low frequency,
conducted interferences in industrial plants
Testing and measurement techniques – Power
Quality measurement methods
EN 50160
IEEE 519
IEC/EN 61000-2-4
IEC/EN 61000-4-30

TYPES OF POWER QUALITY PHENOMENON

HARMONICS
• Harmonics are extra frequencies (multiples of
fundamental frequency) that when present in
an electrical circuit, distort the AC sine wave
• Causes: Non-linear electrical loads; Loads with
rapidly changing energy consumption
• Consequences: Inefficient operation; Excess
heat (skin effect); Overheating in neutral
conductors; Decreased efficiency and lifespan
of equipment; Circuit breakers can trip
• Benefit of measuring: Identify the source of
harmonics in the electrical system; Increase
operational safety and efficiency
Capacitors destroyed due to harmonics

SAGS AND SWELLS
• Voltage Sag is a decrease in rms voltage less than
0.9 pu for a duration less than 1 minute
• Voltage Swell is a increase in rms voltage greater
than 1.1 pu for a duration less than 1 minute
• Causes – Heavy energy loads turning on or off
(inside) or network faults (outside)
• Consequences – Damage to machines and
equipment; Loss of use; Short interruptions can be
catastrophic for sensitive applications
• Benefit of measuring – Avoid damage and costly
downtime

TRANSIENTS
• Transients are high frequency energy packets which superimpose on
fundamental frequency wave and severely affect the high impedance
circuit
• Causes: Switching operation (arcing), lightning strike or malfunction
• Consequences: Fast change in voltage, current or load; Can lead to
insulation breakdown; Breaker trips and damage to equipment
• Benefit of measuring: Avoid costly downtime and damage to
equipment

UNBALANCE
• Deviation in voltage or current waveform from
perfect sinusoidal, in terms of magnitude or phase
shift is called unbalance in a system.
• Causes: Asymmetry of loads like single phase
loads, phase-to-phase loads or unbalanced three
phase loads (e.g. welding equipment)
• Consequences: Reduced efficiency; Excess heat
and overheating; Device failure and damage to
equipment; Reduced lifespan of equipment
• Benefit of measuring: Increase lifespan; Avoid
overheating; Reduce unwanted downtime

FLICKER
• Voltage variations cause light density changes in
lamps, which can result in visual perceptions
referred to as flicker
• Causes: Load variations (furnaces, welding
machines, generators, VFDs, large motors); Wind
generators
• Consequences: Visible fluctuations in brightness
of a lamp; Possible health problems
• Benefit of measuring: Find out what equipment
within the electrical distribution is causing Flicker

RESIDUAL CURRENT MONITORING
• TN-S system (5-conductor network) – Basic precondition for the
safe operation of IT equipment, machinery
• and networked systems including residual current monitoring
• RCM plays important role in high availability supply
systems such as Data Centres and Hospitals
• Rapid & direct identification of faults and insulation
problems
• Avoids fire risks and increases system availability
• Extra safety in areas in which no RCDs can be used
due to operational reasons
• Preventive maintenance = higher productivity &
uptime

POWER QUALITY MONITORING (PQM)
• Power Quality Monitoring (PQM) is the process
of gathering, analyzing and interpreting raw
measurement data into useful information
• PQM is often done to improve system-wide power
quality performance
• Power Quality Monitoring includes:
• Power Quality metering, monitoring and
onsite measurements
• Temporary and Permanent power quality
monitoring to facilitate problem solutions
• Documenting and trending system
performance to increase system reliability

BENEFITS OF POWER QUALITY MONITORING
(DIN EN 50160)
Secure, highly-availability
power supply
Assured quality of the electrical
energy through continuous
monitoring and analysis
Avoidance of
overload situations
Avoidance of production
stoppages
Ensuring product quality/stable
processes
Maximisation of
operating times
Production-related quality
assurance by monitoring the local
power quality
Optimisation of the
maintenance costs

ONE SYSTEM THREE BENEFITS
Energy Management
ISO 5001
• Reduces energy costs
• Improves energy
efficiency
Power Quality
EN50160
• Reduces downtime
• Optimizes
maintenance
Residual Current
Monitoring
• Identifies insulation
faults faster
• Improves supply
reliability

LEVELS OF MONITORING

PORTFOLIO OF DEVICES On its capabilities
UMG96PA
UMG605
UMG512PRO
UMG509
UMG96PA
-MID
UMG96PA
-MODULES
UMG103
-CBM UMG801 MOD-800
UMG804
EC-1 EC-2 EC-3
EI-1 ED-1
UMG96S2
UMG604
UMG804 BCPM
RCM202 RCM201
UMG96RM UMG96RM-E
UMG96RM-P
UMG96RM
-CBM
UMG96RM-PN
UMG96RM-EL
UMG96RM-M

JANITZA UMG 512-PRO
• Power Quality Analyzer, Class A according to IEC 61000-4-30
• High Accuracy: Active Energy Class 0.2S Voltage 0.1%, Current
0.1%
• Modbus Master / Gateway & Modbus RS485
• Modbus TCP, FTP, SMTP, SNMP, Bacnet, Profibus
• All communication protocols are working simultaneously
• NTP and PTP time synchronisation
• Jasic PLC Programming
• Memory 256 MB
• Digital I/O, (2 In & 2 Out), Temperature Input
• 2 Analogue Inputs for RCM Measurement or Temperature
Measurement
• Logging of currents and voltages (15 – 440 Hz)
• Recording of over 2,000 measurement values

JANITZA SOFTWARE
GridVis software
Visualisation software for energy
management systems and for power
quality monitoring.

JANITZA APPS – APPLICATION SOFTWARE
WITH KNOW-HOW
• APPs can be called up via the measurement device
homepage
• Web-based data display and configuration
• No software installation required
• Data can also be displayed directly in the browser on
mobile devices such as an iPad
• Extremely cost-effective and convenient solution
• User-defined settings enable a low data volume

APP Mini EnMs

Contact us
MESSUNG SYSTEMS PVT. LTD.
501, 502 & 503 Lunkad Sky Vista, Viman Nagar, Pune, India - 411 014.
+91 20 6649 2800 | info@messung.com
THANK YOU

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