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Инструкция по эксплуатации Страница: 41

Fluke 1745 [41/72] Signal sampling

Power Quality Logger

Using the 1745 Power Quality Logger

Signal Sampling

Input signals (up to three voltages and four currents) are filtered with an anti-

aliasing filter and digitized with a 16-bit A/D converter. The sampling rate is

10.24 kHz. All parameters are calculated from this data.

Resolution Accuracy

Resolution and accuracy depend on the logging parameter. For details see

“Technical Specifications”.

Voltage Variations

The interval value of the voltage is defined as the mean value of the RMS

values over the interval length defined in PQ Log.

Содержание

Power quality logger 1
Power quality logger users manual 1
Users manual 1
Fluke corporation p o box 9090 everett wa 98206 9090 u s a 2
Fluke europe b v p o box 1186 5602 bd eindhoven the netherlands 2
Limited warranty and limitation of liability 2
Limites de garantie et de responsabilite 3
Beschränkte garantie und haftungsbegrenzung 4
Fluke corporation p o box 9090 everett wa 98206 9090 usa 4
Fluke europe b v p o box 1186 5602 bd eindhoven niederlande 4
Fluke corporation p o box 9090 everett wa 98206 9090 usa 5
Fluke europe b v p o box 1186 5602 bd eindhoven paesi bassi 5
Garanzia limitata e limitazione di responsabilità 5
Fluke corporation p o box 9090 everett wa 98206 9090 eua 6
Fluke europe b v p o box 1186 5602 bd eindhoven holanda 6
Garantia limitada e limitação de responsabilidade 6
Fluke corporation p o box 9090 everett wa 98206 9090 ee uu 7
Fluke europe b v p o box 1186 5602 bd eindhoven holanda 7
Garantía limitada y limitación de responsabilidad 7
有限担保和有限责任 8
Table of contents 9
Title page 9
List of tables 11
Table title page 11
Figure title page 13
List of figures 13
Information and pc software cd 15
Introduction 15
Power quality logger 15
Logger power supply 16
Logging functions 16
Safety instructions 18
Symbols 18
Warnings 18
W x warnings 19
Qualified personnel 20
Standard equipment and optional accessories 20
Inspect the contents of the shipping box for completeness and damage report any damage to the shipper 21
Power quality logger 21
8 1 4 5 22
Current input 22
Features 22
Figure 2 1745 power quality logger front view 22
Logging status 22
Start stop 22
Supply input 22
This section introduces the logger s controls indicators and other features refer to figure 2 and table 4 22
Users manual 22
Voltage input 22
Power quality logger 23
Power network configurations 25
Working with logged data 25
About logging jobs 26
Using the 1745 power quality logger 26
Preparing the logger for use 27
Current input 28
Figure 3 supplying operating power to the logger 28
Logging status 28
Max 660 v 28
Power in parallel with test leads power from wall outlet 28
Power supply leads 28
Start stop 28
Supply input 28
Users manual 28
Voltage input 28
Voltage test leads 28
Connecting current probes 29
Logging with voltage converters 29
Test leads markings 29
Connecting the logger 30
W x warnings 30
Connections in 3 phase 4 wire wye systems 33
Current input 33
Figure 4 logging in a 3 phase 4 wire wye system 33
Figure 4 shows the connections for logging 3 phase 4 wire wye systems 33
L1 l2 l3 n 33
Logging status 33
Power quality logger 33
Start stop 33
Supply input 33
Using the 1745 power quality logger 33
Voltage input 33
Connections in 3 phase 3 wire delta systems 34
Current input 34
Figure 5 logging in a 3 phase 3 wire delta system 34
Figure 5 shows the connections for logging 3 phase 3 wire delta systems 34
L1 l2 l3 n 34
Logging status 34
Power supply 34
Start stop 34
Supply input 34
The test lead n can be left open or connected to ground potential 34
Users manual 34
Voltage input 34
Connections for single phase logging 35
Current input 35
Figure 6 shows the connections for logging single phase logging systems 35
Figure 6 single phase logging 35
Logging status 35
Power quality logger 35
Power supply 35
Start stop 35
Supply input 35
Using the 1745 power quality logger 35
Voltage input 35
Connections for medium voltage networks 36
Current input 36
Figure 7 measuring 3 phase voltages in a 3 wire delta system with three voltage converters 36
In a 3 phase 3 wire delta system with three separate voltage converters and three current transformers the logger can measure phase phase p p delta or phase n p n wye see figure 7 36
Logging status 36
Power supply 36
Start stop 36
Supply input 36
Users manual 36
Voltage input 36
Current input 37
Figure 8 two element delta connections 37
Figure 9 shows the connections for two element delta aron or blondel metering connections 37
Logging status 37
Power quality logger 37
Power supply 37
Start stop 37
Supply input 37
Using the 1745 power quality logger 37
Voltage input 37
Completing the logging job 38
Logging 38
Evaluating the logged data 39
Methods of logging 39
Connection nominal voltages wye delta max input voltage 40
Figure 9 basic logger setup parameters 40
Table 6 measuring ranges 40
Table 6 shows the measuring ranges of the logger and figure 9 shows the selection for input ranges during job processing 40
The software calculates the correct measuring range depending on the nominal voltage 20 overflow with 40
Users manual 40
Voltage ranges 40
Resolution accuracy 41
Signal sampling 41
Voltage variations 41
Averaging period 42
Min max values 43
Voltage interruptions 44
Voltage dips and swells 45
Voltage harmonics 45
Current harmonics 46
Mains signaling 46
I thdi 47
Thd v in function a 47
V v thd 47
Calculation of thd in measuring function p 48
I i thdi 48
Thd measuring function p 48
V v thdv 48
Flicker 49
Formula for plt function 49
Pst plt 49
Crest factor cf 50
Current logging 50
Frequency 50
Logging function a 50
Unbalance 50
Measurement theory 52
P q ϕ tan 54
Q p s d 54
Disposal 56
Lithium battery 56
Maintenance 56
Logging parameters overview 57
Power quality logger 57
Table 7 shows an overview of the logging parameters 57
Technical specifications 57
General information 58
Maximum number of intervals for logging funtion p 58
The maximum recording period can be calculated by multiplying the interval time defined in pq log with the maximum number of intervals in the following table 58
Environmental specifications 59
Power quality logger 59
Power supply 59
Input voltage 60
Measurement 60
Current input for clamp 61
Current input with flexi set 61
Power quality logger 61
Current logging values 62
Events dips swells interruptions 62
Flicker 62
General specifications 62
Rms logging slow voltage variations 62
Analysis of logging data 63
Harmonics logging function a only 63
Power p s p 63
Power quality logger 63
Programming and analysis is done by pq log software on pc 63
Statistics 63
Thdv thdi per iec en 61000 4 7 class b 63
Logging function parameters 64
Logging values 64
Applications 65
Pq log pc application software 66
Live reading online test 67
Ascii export 68
Timeplot diagram 69
Cumulative frequency harmonics 70
Unipede disdip table 70

Fluke 1745 [41/72] Signal sampling

Содержание

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