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### Overview & Applications Power Meters Ben Kemink Agenda Watt is power? Why do we measure power? Overview of power meters Applications and markets Watt is power? – PowerPoint PPT presentation

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Title: Overview

1
Overview Applications Power Meters
• Ben Kemink

2
Agenda
• Watt is power?
• Why do we measure power?
• Overview of power meters
• Applications and markets

3
Watt is Power?
4
Watt is power?
• Apparent power (a calculated value)
• Apparent power is the total electrical energy
available from the
• connection point, to do work.
• Ps Papparent P available
• Formula
• Ps Urms x Irms VA

5
Watt is power?
• Average power, Pavg (a calculated value)
• Also called True power, Active Power,
Effective Power or
• Converted Electrical Power
• The Average Power is the calculated average of
the instantaneous
• transmitted electrical energy.
• This is the part we have to pay for and the
accumulated value over
• time can be read out from the Kilowatt hour meter
(Kwh-meter).
• Formula
• Pavg Urms x Irms x Cos f W

6
Watt is power?
• Cos f (a calculated value)
• Cos f, is an indication for the efficiency of
energy conversion from
• electrical energy into any other kind of energy
(Heat, Motion, etc.)
• F, is the phase difference between voltage and
current.
• The smaller the phase angle (f ideal 0), the
better Cos f 1, the
• higher the power conversion efficiency.

7
Watt is power?
• Reactive power (a calculated value)
• Reactive power is that part of the energy made
available at the
• destination, not used (converted) by the end
users application.
• This energy is continuously transported back and
forward through the
• power cables.
• Due to the resistance of these transportation
cables some of this
• reactive power is lost (converted into heat).
• This is at the cost of the generator power
station.
• Formula
• Pq Urms x Irms x sin f var

8
Watt is power?
Apparent Power
Available
Average Power
Used
Reactive Power
Not Used
9
Watt is power?
• The Power Triangle

Ps Pq Pavg
These are all calculated average values!
10
Why do we measure power?
11
Why do we measure power?
• Electrical Power Plants are designed and built to
• generate electrical power. After completion this
needs
• to be verified for an acceptance test.
• If energy is traded between an Electrical Power
Plant and Industrial
• Company, the amount of energy needs to be
measured correctly at
• both ends. A power standard and reference is
required.
• Power supplies of daily used instruments are
designed
• and built as small as possible and as
light-weight as
• possible. Still they need to work correctly even
under
• the most severe circumstances. This needs to be
• verified.

12
Why do we measure power?
In the past mechanical power was driven by
horses, wind, steam and explosion engines. Today
the majority of mechanical power is generated by
an electric motor.
Steam engine
The electrical specifications of this motor must
be measured, in order to verify if its
electrical power is sufficient to do the required
mechanical job.
Every household has a so called kWh-meter or
energy meter to measure the used electrical
power over time. Every kWh has to be paid for,
so you better measure it correctly!
13
Why do we measure power?
Under pressure of environmental control
legislation, manufacturers of electrical
equipment are forced to minimize power
consumption. If two washing machines perform
an evenly good job in washing, the one using
less energy is favorite. It will rank higher
in the list of preferred products made by the
Consumer Test Associations. Power
transformers delivered to Power Stations are
locally verified before installation.
14
Energy Saving Electric Power
• Power Power equipment (motor, pump, fan,
machine tool) Electromagnet (solenoid)
• Heat Heating (heater, furnace)
• Light Illumination
• Others General purpose electrical
machinery, Electric and electronic equipment,
etc.

Effective power Power loss
15
Overview of Power Meters
16
History models
• Most important power meters in the past were
• 1990-1996 2531 digital power meter
• 1990-1997 2533 digital display power meter
• 1995-2000 WT110 / WT130 digital power meters
• 2000-2002 WT200 digital power meter (successor of
WT110)
• 1996-2001 WT1000 digital power meter (successor
of 2533)
• 1997-2002 WT2000 digital power meter (successor
of 2531)

17
CW100 CW200 hand-held power meter series
• CW100 CW200 series
• Light weight, small sized battery powered
electric energy and power meter for field
applications
• Wiring check
• High speed field data logging. Up to 1 per second
• Efficiency measuring two 3-phase loads at the
same time

Bandwidth 45 65 Hz Sample Speed 8.3 kS/s ADC
16 bits Power accuracy 0.6
18
WT210 / WT230 digital power meters
• WT210 (1-phase) WT230 (2-3 phase) series
• One compact instrument to measure voltage,
current, phase angle, power factor, harmonics
etc.
• The most used power meter in production
facilities
• Extremely good price/performance ratio
• Down to a 5mA range (WT210) to measure
standby/sleep mode power with 25µA resolution.
• Go-NoGo test output for quality control

Bandwidth 0.5 Hz-100 kHz Sample speed 51
kS/s ADC 16 bits Power accuracy 0.1
19
WT1600S digital power meter
• WT1600S
• The WT1600S offers electrical pump and motor
tester a free selection of input elements and a
wide choice of measurement ranges for a higher
accuracy.
• Highest accuracy for electrical energy
measurements by offering a continue sample speed
of 200kS/s.
• Mechanical torque and rotation speed input for
efficiency measurements.

Bandwidth 0.5 Hz-300 kHz Sample speed 200
kS/s ADC 16 bits Power accuracy 0.1
20
WT1600 digital power meter
• WT1600
• With 6 elements the WT1600 allows efficiency
measurements of 3-phase-4 wire input/output
systems.
• Standard Master-Slave function allows synchronize
operation of four WT1600 power meters or 24 power
elements.
• Wide input frequency range DC, 0.5-1MHz.
• Trend display
• Up to the 100th higher harmonic

Bandwidth 0.5 Hz-1 MHz Sample speed 200
kS/s ADC 16 bits Power accuracy 0.1
21
WT3000 digital power analyzer
• WT3000
• Worlds most stable and most accurate power
analyzer.
• The WT3000 supports the 50/60 Hz (10/12 cycles)
of inter-harmonic measurement required by
IEC61000-4-7 edition 2. Is able to measure on IEC
compliant harmonic measurements and Voltage
Fluctuation Flicker measurements.
• 4 input modules.
• 8.4 inch LCD screen.
• USB Ethernet interface.

Bandwidth 0.1 Hz-1 MHz Sample speed 200
kS/s ADC 16 bits Power accuracy 0.02
22
PZ4000 power analyzer
• PZ4000
• By combining a high precision power measurement
and long memory
• oscilloscope technologies, Yokogawa created the
instrument
• suitable for measuring and analyzing the power in
• in the faster transients, like robotics and soft
starters.
• DSO type of triggering and cursor measurements.
• Harmonic analysis up to the 500th order.
• 4 input elements (modular).
• Torque and speed inputs.

Bandwidth 2 MHz Sample speed 5 MS/s ADC 12
bits Power accuracy 0.1
23
Markets
24
Markets
• Lighting
• Pumps
• Inverters
• Transformers
• Hybrid
• Fuel Cell
• Wind energy
• Solar
• UPS
• Power supplies

25
Markets
• Lighting
• Characterize the lamp (RD) Excellent PZ4000
application
• Production WT3000 / WT1600(S)
• Energy measurements (consumption) WT210 / WT230
• Customers

26
Markets
• Pumps
• Characterize the pump (start-up behavior)
• PZ4000 application
• Testing WT3000 / WT1600 / WT230
• Customers

27
Markets
• Inverters
• Research Developments PZ4000
• Testing WT3000/WT1600
• Production WT230
• Customers

28
Markets
• Transformers
• Excellent WT3000 application!
• Customers

29
Markets
• Hybrid Cars
• Perfect WT1600 application!
• Customers Most car manufactures!

30
Markets
• Fuel cell
• A WT1600FC application
• Customers

31
Markets
• Wind energy
• Research Development WT3000
• PZ4000
• Testing WT1600
• Customers

32
Markets
• Solar
• Research Development PZ4000
• Testing WT1600 / WT230
• Customers

33
Markets
• Uninterruptible Power Supplies (UPS)
• Research Development PZ4000
• Testing production WT1600

34
Do you have a question ?
Thank You