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Fluke 1760 [55/110] Apparent power
![Fluke 1760 [55/110] Apparent power](/views2/1005066/page55/bg37.png)
Operation
Methods of Measurement/Formulas 3
3-15
where
i
U rms value of the voltage bin with the frequency i⋅5 Hz
i
I rms value of the current bin with the frequency i⋅5 Hz
i
ϕ
phase angle difference between voltage and current of the frequency i⋅5 Hz
The 3-phase real power sum is calculated as
321 LLLsum
PPPP ++=
Apparent power
Apparent power
S
is calculated by multiplying rms values of voltage and current of the
given aggregation.
IUS ⋅=
The 3-phase apparent power sum is calculated as
321 LLLsum
SSSS ++=
Reactive power
The harmonic reactive power
h
Q is also derived from the results of the FFT calculations
of voltage and current. The index h in
h
Q indicates that the calculated reactive power
component is derived from the harmonics (FFT) calculation.
∑
=
⋅⋅=
1023
0
sin
i
iiih
IUQ
ϕ
Because every frequency component of the calculation has a sign,
h
Q is also signed. All
other reactive power components are unsigned (always positive) by definition.
The 3-phase harmonic reactive power sum is calculated as
321 LhLhLhsumh
QQQQ ++=
The total reactive power
tot
Q is calculated by
22
PSQ
tot
−=
The 3-phase total reactive power sum is calculated as
321 LtotLtotLtotsumtot
QQQQ ++=
The remaining reactive power component
d
Q (d stands for distortion) contains the rest of
the reactive power phenomena (mainly distortion reactive power and modulation reactive
Содержание
- Power quality recorder 1
- Users manual 1
- Limited warranty and limitation of liability 2
- Table of contents 3
- List of tables 7
- List of figures 9
- Chapter 1 11
- Introduction 11
- About this manual 13
- Symbols 13
- Cat identification 14
- Safety instructions 14
- Warnin 14
- Warnings 14
- Mains connection 17
- Safety instructions on device housing 17
- Warning 17
- Design and functions 18
- Input voltage œ measuring inputs 18
- Mains connection and interfaces 18
- Servicing and maintenance 18
- Functional description 20
- C led indicators 21
- Introduction design and function 21
- Leds in the field power 21
- Overview 21
- Leds ch1 to ch8 24
- The following information is provided in case a valid sensor is detected 24
- The following information is provided in case no valid sensor is detected 24
- Three leds are assigned to each of the eight input channels of the recorder the indicators refer to half cycle or full circle rms values of the input signal depending on the configuration 24
- Warning 25
- F serial port com1 rs232 26
- G feature connector 26
- Maximum load current 5 ma 26
- Pin assignment 26
- Serial port for connection of the device to the serial port of a pc 26
- Specification of outputs inputs 26
- The default settings are 57 00 baud 8 data bits 1 stop bit no parity 26
- H measurement channels 27
- Introduction design and function 27
- Note inputs that are not in use must be covered with the supplied protective caps to prevent pollution 27
- Pin assignment 27
- Plugs for 8 isolated measurement channels connect only original accessories such as voltage and current sensors clamps flexi set shunt resistors etc the plug is secured by means of a bayonet mechanism 27
- When analyzing transients with options 2540582 2540575 the potential to earth ground is measured 27
- Basic measurements 28
- Measurement types 28
- Measurements 29
- Chapter 2 31
- Getting started 31
- Checking of delivery 33
- Startup 33
- Installation 34
- Switching the device off 34
- Switching the device on 34
- W x warning 34
- Simple measurement function check 35
- After successful connection you see a green light in the lower right corner next to status information about the instrument 36
- In the live modes section press setup 36
- In the search devices dialog press search select your instrument in the list and press connect 36
- Storage 39
- Transport 39
- Transport and storage 39
- Chapter 3 41
- Operation 41
- Connecting sequence 43
- Connections to measuring circuits 43
- Warning 43
- Connection diagrams 44
- Phase measurement 44
- Wire network with two current sensors aron2 method 45
- Wire network with two current sensors aron2 method open delta method 47
- Wire network 3 wattmeter method 48
- Four wire network three wattmeter method with n conductor voltage and n conductor current 49
- Associated pc software settings 50
- Check the respective option 50
- If required you have the option to determine events flicker and harmonics of the phase to phase voltages 50
- Two star connected voltage systems 51
- Two voltage systems in delta configuration 52
- Methods of measurement formulas 53
- Parameter aggregation 53
- Aggregations 200 ms and higher 54
- Calculation of power parameters 54
- I u p ϕ 54
- Real power 54
- Apparent power 55
- Q q q q 55
- Reactive power 55
- Arctan cos co 56
- Displacement power factor cos 56
- Power factor 56
- Q q q q 56
- S p pf 56
- Half and full cycle aggregations 57
- I i i u p 57
- Real power 57
- Apparent power 58
- Events and flicker 58
- P p p p 58
- Power factor 58
- Q q q q 58
- Reactive power 58
- S p pf 58
- S s s s 58
- Harmonics and interharmonics parameters 59
- K factor and factor k 60
- N v v thd 60
- V n thd 60
- H i p p k 61
- I i n i i e e k 61
- Signaling voltage 62
- Sin 240 sin 120 cos 240 cos 3 1 62
- Unbalance overdeviation underdeviation 62
- Φ ϕ ϕ ϕ 62
- 100 6 3 1 63
- Current unbalance 63
- Overdeviation and underdeviation 64
- Operation methods of measurement formula 65
- Table 3 2 parameter aggregation matrix 65
- Chapter 4 67
- Maintenance 67
- Cleaning 69
- Introduction 69
- Maintenance of battery package 69
- Decommissioning and disposal 70
- Replacement of battery pack 70
- Shutting down 70
- Wx warning 70
- Recalibration 71
- Recycling and disposal 71
- Warranty 71
- Chapter 5 73
- Specifications 73
- General specifications 75
- Specifications general specification 75
- Specifications general specification 77
- Instrument with 600v 1000v sensor 78
- Chapter 6 79
- Options and accessories 79
- Accessories 81
- All probes contain a memory for calibration factors sensor identity and serial number which is read automatically by the instrument ranges can be selected in the pq analyze software 81
- Instruments 81
- Options and accessories instrument 81
- Other measuring transducers can be connected to the inputs of these sensors 81
- The current sensor for direct current measurement shunt is available for 20 ma 81
- The flexible current sensors tps flex are available for ranges between 100 a and 6000 a ac 2 ranges can be selected in the pq analyze software 81
- The passive current clamps ac only are available in ranges with 1 a up to 1000 a 2 ranges can be selected in the pq analyze software 81
- The voltage probes for various ranges between 10 v and 1000 v are available for the instrument 81
- Aging 0 5 year 82
- All voltage sensors are suitable for dc for dc and ac up to 5 khz 82
- Standard voltage probes for ac and dc 82
- Temperature coefficient 100 ppm k 82
- Current probes for ac currents 83
- Flexible current probes for ac 83
- Options and accessories accessorie 83
- Current clamp 1 a 10 a ac 84
- Other accessories 84
- Shunt resistors for ac and dc currents 84
- W warning 85
- Phase angle in degrees primary current in a 86
- Dimensions in mm 87
- Current clamp 5 a 50 a ac 89
- W warning 90
- Phase angle in degrees primary current in a 91
- Current clamp 20 a 200 a ac 92
- W warning 93
- Accuracy typical for 50 60 hz 94
- Linearity error in of measured value primary current in a 94
- Flexi current sensor 100 a 500 a 96
- W warning 97
- Phase angle in degrees primary current in a 98
- Flexi current sensor 200 a 1000 a 100
- W warning 101
- Phase angle in degrees primary current in a 102
- Flexi current sensor 3000 a 6000 a 103
- W warning 104
- Gps time synchronization œ 2539223 106
- Options 106
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