METREL power master MI 2892 User manual

Power Master
MI 2892
Instruction manual
Version 1.1, Code No. 20 752 217

2
Distributor:
Manufacturer:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: [email protected]
Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and interference causing equipment regulations
© 2013 METREL
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.

MI 2892 Power Master Table of contents
3
1Introduction.............................................................................................................7
1.1Main Features ...................................................................................................7
1.2Safety considerations ........................................................................................8
1.3Applicable standards .........................................................................................9
1.4Abbreviations...................................................................................................10
2Description............................................................................................................19
2.1Front panel ......................................................................................................19
2.2Connector panel ..............................................................................................20
2.3Bottom view.....................................................................................................21
2.4Accessories .....................................................................................................21
2.4.1Standard accessories...............................................................................21
2.4.2Optional accessories ................................................................................21
3Operating the instrument.....................................................................................22
3.1Instrument status bar.......................................................................................23
3.2Instrument keys ...............................................................................................24
3.3Instrument memory (microSD card) ................................................................24
3.4Instrument Main Menu.....................................................................................25
3.4.1Instrument submenus...............................................................................26
3.5U, I, f................................................................................................................28
3.5.1Meter ........................................................................................................28
3.5.2Scope .......................................................................................................30
3.5.3Trend........................................................................................................32
3.6Power ..............................................................................................................34
3.6.1Meter ........................................................................................................34
3.6.2Trend........................................................................................................36
3.7Energy.............................................................................................................39
3.7.1Meter ........................................................................................................39
3.7.2Trend........................................................................................................40
3.8Harmonics / interharmonics.............................................................................41
3.8.1Meter ........................................................................................................41
3.8.2Histogram (Bar)........................................................................................43
3.8.3Trend........................................................................................................45
3.9Flickers ............................................................................................................47
3.9.1Meter ........................................................................................................47
3.9.2Trend........................................................................................................48
3.10Phase Diagram................................................................................................50
3.10.1Phase diagram .........................................................................................50
3.10.2Unbalance diagram ..................................................................................51
3.10.3Unbalance trend.......................................................................................52
3.11Temperature....................................................................................................53
3.11.1Meter ........................................................................................................53
3.11.2Trend........................................................................................................54
3.12Signalling.........................................................................................................54
3.12.1Meter ........................................................................................................55
3.12.2Trend........................................................................................................56
3.13General Recorder............................................................................................57
3.14Waveform/inrush recorder ...............................................................................58
3.14.1Setup........................................................................................................58
3.14.2Capturing waveform .................................................................................59
3.14.3Captured waveform..................................................................................61

MI 2892 Power Master Table of contents
4
3.15Transient recorder ...........................................................................................62
3.15.1Setup........................................................................................................62
3.15.2Capturing transients .................................................................................63
3.15.3Captured transients ..................................................................................65
3.16Events table.....................................................................................................66
3.17Alarms table ....................................................................................................70
3.18Memory List.....................................................................................................72
3.18.1General Record........................................................................................73
3.18.2Waveform snapshot .................................................................................76
3.18.3Waveform/inrush record ...........................................................................78
3.18.4Transients record .....................................................................................78
3.19Measurement Setup submenu ........................................................................78
3.19.1Connection setup .....................................................................................79
3.19.2Event setup ..............................................................................................82
3.19.3Alarm setup ..............................................................................................82
3.19.4Signalling setup........................................................................................84
3.20General Setup submenu..................................................................................84
3.20.1Communication ........................................................................................85
3.20.2Time & Date .............................................................................................86
3.20.3Time & Date .............................................................................................86
3.20.4Language .................................................................................................87
3.20.5Instrument info .........................................................................................88
3.20.6Lock/Unlock..............................................................................................88
3.20.7Colour model............................................................................................90
4Recording Practice and Instrument Connection ...............................................92
4.1Measurement campaign ..................................................................................92
4.2Connection setup ............................................................................................96
4.2.1Connection to the LV Power Systems ......................................................96
4.2.2Connection to the MV or HV Power System...........................................100
4.2.3Current clamp selection and transformation ratio setting .......................101
4.2.4Temperature probe connection ..............................................................105
4.2.5GPS time synchronization device connection ........................................105
4.3Remote instrument connection (over Internet) ..............................................106
4.3.1Communication principle ........................................................................106
4.3.2Instrument setup on remote measurement site ......................................107
4.3.3PowerView setup for instrument remote access ....................................108
4.3.4Remote connection ................................................................................110
4.4Number of measured parameters and connection type relationship .............121
5Theory and internal operation ...........................................................................123
5.1Measurement methods..................................................................................123
5.1.1Measurement aggregation over time intervals .......................................123
5.1.2Voltage measurement (magnitude of supply voltage) ............................123
5.1.3Current measurement (magnitude of supply current).............................124
5.1.4Frequency measurement .......................................................................125
5.1.5Power measurement (Standard compliance: IEEE 1459-2010) .............125
5.1.6Energy....................................................................................................131
5.1.7Harmonics and interharmonics...............................................................132
5.1.8Signalling................................................................................................134
5.1.9Flickers...................................................................................................135
5.1.10Voltage and current unbalance ..............................................................136

MI 2892 Power Master Table of contents
5
5.1.11Voltage events .......................................................................................136
5.1.12Alarms ....................................................................................................139
5.1.13Data aggregation in GENERAL RECORDING .......................................139
5.1.14Waveform snapshot ...............................................................................142
5.1.15Waveform record....................................................................................143
5.1.16Transient recorder..................................................................................144
5.2EN 50160 Standard Overview .......................................................................145
5.2.1Power frequency ....................................................................................145
5.2.2Supply voltage variations .......................................................................146
5.2.3Supply voltage unbalance ......................................................................146
5.2.4THD voltage and harmonics...................................................................146
5.2.5Interharmonic voltage.............................................................................146
5.2.6Mains signalling on the supply voltage ...................................................147
5.2.7Flicker severity .......................................................................................147
5.2.8Voltage dips ...........................................................................................147
5.2.9Voltage swells ........................................................................................148
5.2.10Short interruptions of the supply voltage ................................................148
5.2.11Long interruptions of the supply voltage.................................................148
5.2.12Power Master recorder setting for EN 50160 survey..............................148
6Technical specifications ....................................................................................149
6.1General specifications ...................................................................................149
6.2Measurements...............................................................................................149
6.2.1General description ................................................................................149
6.2.2Phase Voltages ......................................................................................150
6.2.3Line voltages ..........................................................................................151
6.2.4Current ...................................................................................................151
6.2.5Frequency ..............................................................................................153
6.2.6Flickers...................................................................................................153
6.2.7Combined power ....................................................................................153
6.2.8Fundamental power................................................................................153
6.2.9Nonfundamental power ..........................................................................154
6.2.10Power factor (PF) ...................................................................................155
6.2.11Displacement factor (DPF) or Cos φ) .....................................................155
6.2.12Energy....................................................................................................155
6.2.13Voltage harmonics and THD ..................................................................156
6.2.14Current harmonics and THD ..................................................................156
6.2.15Voltage interharmonics...........................................................................156
6.2.16Current interharmonics...........................................................................156
6.2.17Signalling................................................................................................157
6.2.18Unbalance ..............................................................................................157
6.2.19Time and duration uncertainty................................................................157
6.2.20Temperature probe.................................................................................157
6.3Recorders......................................................................................................158
6.3.1General recorder ....................................................................................158
6.3.2Waveform/inrush recorder......................................................................158
6.3.3Waveform snapshot ...............................................................................159
6.3.4Transients recorder ................................................................................159
6.4Standards compliance...................................................................................159
6.4.1Compliance to the IEC 61557-12 ...........................................................159
6.4.2Compliance to the to the IEC 61000-4-30 ..............................................160

MI 2892 Power Master Table of contents
6
7Maintenance........................................................................................................161
7.1Inserting batteries into the instrument ...........................................................161
7.2Batteries ........................................................................................................162
7.3Power supply considerations.........................................................................163
7.4Cleaning ........................................................................................................164
7.5Periodic calibration ........................................................................................164
7.6Service ..........................................................................................................164
7.7Troubleshooting.............................................................................................164

MI 2892 Power Master Introduction
7
1 Introduction
Power Master is handheld multifunction instrument for power quality analysis and
energy efficiency measurements.
Figure 1.1: Power Master instrument
1.1 Main Features
Full compliance with power quality standard IEC 61000-4-30 Class A.
Simple and powerful recorder with microSD memory card (sizes up to 32 GB are
supported).
4 voltage channels with wide measurement range: up to 1000 Vrms, CAT III /
1000 V, with support for medium and high voltage systems.
Simultaneous voltage and current (8 channels) sampling, 16 bit AD conversion
for accurate power measurements and minimal phase shift error.
4 current channels with support for automatic clamp recognition and range
selection.
Compliance with IEC 61557-12 and IEEE 1459 (Combined, fundamental,
nonfundamental power) and IEC 62053-22 (Energy).

MI 2892 Power Master Introduction
8
4.3’’ TFT colour display, easy internet remote access over Ethernet.
Waveform/inrush recorder, which can be triggered on event or alarms, and run
simultaneously with general recorder.
Powerful troubleshooting tools: transient recorder with envelope and level
triggering.
PC Software PowerView v3.0 is an integral part of a measuring system which
provides easiest way to download, view and analyse measured data or print
reports.
oPowerView v3.0 analyser exposes a simple but powerful interface for
downloading instrument data and getting quick, intuitive and descriptive
analysis. Interface has been organized to allow quick selection of data
using a Windows Explorer-like tree view.
oUser can easily download recorded data, and organize it into multiple sites
with many sub-sites or locations.
oGenerate charts, tables and graphs for your power quality data analysing,
and create professional printed reports.
oExport or copy / paste data to other applications (e.g. spreadsheet) for
further analysis.
oMultiple data records can be displayed and analysed simultaneously.
Merge different logging data into one measurement, synchronize data
recorded with different instruments with time offsets, split logging data into
multiple measurements, or extract data of interest.
1.2 Safety considerations
To ensure operator safety while using the Power Master instruments and to minimize
the risk of damage to the instrument, please note the following general warnings:
The instrument has been designed to ensure maximum operator safety. Usage in
a way other than specified in this manual may increase the risk of harm to the
operator!
Do not use the instrument and/or accessories if any visible damage is noticed!
The instrument contains no user serviceable parts. Only an authorized dealer
can carry out service or adjustment!
All normal safety precautions have to be taken in order to avoid risk of electric
shock when working on electrical installations!
Only use approved accessories which are available from your distributor!
Instrument contains rechargeable NiMH batteries. The batteries should only be
replaced with the same type as defined on the battery placement label or in this
manual. Do not use standard batteries while power supply adapter/charger is
connected, otherwise they may explode!
Hazardous voltages exist inside the instrument. Disconnect all test leads,
remove the power supply cable and switch off the instrument before removing
battery compartment cover.

MI 2892 Power Master Introduction
9
Maximum nominal voltage between any phase and neutral input is 1000 VRMS.
Maximum nominal voltage between phases is 1730 VRMS.
Always short unused voltage inputs (L1, L2, L3, GND) with neutral (N) input to
prevent measurement errors and false event triggering due to noise coupling.
Do not remove microSD memory card while instrument is recording or reading
data. Record damage and card failure can occur.
1.3 Applicable standards
The Power Master are designed and tested in accordance with the following standards:
Electromagnetic compatibility(EMC)
EN 61326-2-2: 2013
Electrical equipment for measurement, control
and laboratory use –EMC requirements –
Part 2-2: Particular requirements - Test
configurations, operational conditions and
performance criteria for portable test, measuring
and monitoring equipment used in low-voltage
distribution systems
Emission: Class A equipment (for industrial
purposes)
Immunity for equipment intended for use in
industrial locations
Safety (LVD)
EN 61010-1: 2010 Safety requirements for electrical equipment for
measurement, control and laboratory use –
Part 1: General requirements
EN 61010-2-030: 2010 Safety requirements for electrical equipment for
measurement, control and laboratory use –
Part 2-030: Particular requirements for testing and
measuring circuits
EN 61010-031: 2002 + A1: 2008 Safety requirements for electrical equipment for
measurement, control and laboratory use –
Part 031: Safety requirements for hand-held
probe assemblies for electrical measurement and
test
EN 61010-2-032: 2012 Safety requirements for electrical equipment for
measurement, control and laboratory use
Part 031: Safety requirements for hand-held
probe assemblies for electrical measurement and
test
Measurement methods
IEC 61000-4-30: 2008 Class A Part 4-30: Testing and measurement techniques –
Power quality measurement methods
IEC 61557-12: 2007 Equipment for testing, measuring or monitoring of
protective measures – Part 12: Performance
measuring and monitoring devices (PMD)
IEC 61000-4-7: 2002 + A1: 2008 Part 4-7: Testing and measurement techniques –

MI 2892 Power Master Introduction
10
General guide on harmonics and interharmonics
measurements and instrumentation for power
supply systems and equipment connected thereto
IEC 61000-4-15 : 2010 Part 4-15: Testing and measurement techniques –
Flickermeter – Functional and design
specifications
IEC 62053-22 : 2003 Part 22: Static meters for active energy (Class
0.5S)
IEC 62053-23 : 2003 Part 22: Part 23: Static meters for reactive energy
(Class 2)
IEEE 1459 : 2010 IEEE Standard Definitions for the Measurement of
Electric Power Quantities Under Sinusoidal,
Nonsinusoidal, Balanced, or Unbalanced
Conditions
EN 50160 : 2010 Voltage characteristics of electricity supplied by
public electricity networks
Note about EN and IEC standards:
Text of this manual contains references to European standards. All standards of EN
6XXXX (e.g. EN 61010) series are equivalent to IEC standards with the same number
(e.g. IEC 61010) and differ only in amended parts required by European harmonization
procedure.
1.4 Abbreviations
In this document following symbols and abbreviations are used:
CFI
Current crest factor, including CFIp (phase p current crest
factor) and CFIN (neutral current crest factor). See 5.1.3
for definition.
CFU
Voltage crest factor, including CFUpg (phase p to phase g
voltage crest factor) and CFUp (phase p to neutral voltage
crest factor). See 5.1.2 for definition.
 DPFind/cap
Instantaneous phase power displacement (fundamental)
power factor or cos , including  DPFpind (phase p power
displacement).
Minus sign indicates generated power and plus sign
indicates consumed power. Suffix ind/cap represents
inductive/capacitive character.

MI 2892 Power Master Introduction
11
DPFind/cap

Recorded phase displacement (fundamental) power
factor or cos , including DPFpind/cap

(phase p power
displacement).
Minus sign indicates generated
power and plus sign indicates
consumed power. Suffix
ind/cap represents inductive/
capacitive character. This
parameter is recorded
separately for each quadrant
as shown on figure. See 5.1.5
for definition.
 DPF+totind
 DPF+totcap
Instantaneous positive sequence fundamental power
factor.
Minus sign indicates generated power and plus sign
indicates consumed power. Suffix ind/cap represents
inductive/capacitive character. See 5.1.5 for definition.
DPF+totind

DPF+totcap

Recorded total effective
fundamental power factor.
Minus sign indicates generated
power and plus sign indicates
consumed power. Suffix ind/cap
represents inductive/capacitive
character. This parameter is
recorded separately as shown
on figure. See 5.1.5 for
definition.
Dı
Phase current distortion power, including Dıp(phase p
current distortion power). See 5.1.5 section: Power
measurement (Standard compliance: IEEE 1459-2010)
for definition.
Deıtot
Total effective current distortion power. See 5.1.5 section:
Power measurement (Standard compliance: IEEE 1459-
2010) for definition.
DH
Phase harmonics distortion power, including DHp(phase
p harmonics distortion power). See 5.1.5 section: Power
measurement (Standard compliance: IEEE 1459-2010)
for definition.
DeH
Total effective harmonics distortion power. See 5.1.5
section: Total nonfundamental power measurements for
definition.
Dᴠ
Phase voltage distortion power, including Dᴠp(phase p
voltage distortion power). See 5.1.5 section: Power
measurement (Standard compliance: IEEE 1459-2010)
for definition.
Deᴠtot Total effective voltage distortion power. See 5.1.5
27
0
0
DPFind+
DPFcap+
DPFcap-
DPFind-
1800
900
00
+P-P
-Q
+Q
I
II
III IV
27
0
0
Lead
Lag
1800
900
00
+P-P
-Q
+Q
I
II
III IV
DPF+totind+
DPF+totcap+
DPF+totcap-
DPF+totind-

MI 2892 Power Master Introduction
12
section: Power measurement (Standard compliance:
IEEE 1459-2010) for definition.
Ep

Recorded phase combined (fundamental and
nonfundamental) active energy, including Epp+/- (phase p
active energy). Minus sign indicates generated energy
and plus sign indicates consumed energy. See 5.1.6 for
definition.
Eptot

Recorded total combined (fundamental and
nonfundamental) active energy. Minus sign indicates
generated and plus sign indicates consumed energy. See
5.1.6 for definition.
Eq

Recorded phase fundamental reactive energy, including
Eqp+/- (phase p reactive energy). Minus sign indicates
generated and plus sign indicates consumed energy. See
5.1.6 for definition.
Eqtot

Recorded total fundamental reactive energy. Minus sign
indicates generated and plus sign indicates consumed
energy. See 5.1.6 for definition.
f, freq
Frequency, including freqU12 (voltage frequency on U12),
freqU1 (voltage frequency on U1and freqI1 (current
frequency on I1). See 5.1.4 for definition.
i-Negative sequence current ratio (%). See 5.1.10 for
definition.
i0Zero sequence current ratio (%). See 5.1.10 for definition.
I+
Positive sequence current component on three phase
systems. See 5.1.10 for definition.
I-Negative sequence current component on three phase
systems. See 5.1.10 for definition.
I0Zero sequence current components on three phase
systems. See 5.1.10 for definition.
IRms½ RMS current measured over each half period , including
IpRms½ (phase p current), I
N
Rms½ (neutral RMS current)
Ifund
Fundamental RMS current Ih1(on 1st harmonics),
including Ifundp(phase p fundamental RMS current) and
IfundN(neutral RMS fundamental current). See 5.1.7 for
definition
Ihn
nth current RMS harmonic component including Iphn
(phase p; nth RMS current harmonic component) and INhn
(neutral nth RMS current harmonic component). See 5.1.7
for definition
Iihn
nth current RMS interharmonic component including Ipihn
(phase p; nth RMS current interharmonic component) and
INihn(neutral nth RMS current interharmonic component).
See 5.1.7 for definition

MI 2892 Power Master Introduction
13
INom Nominal current. Current of clamp-on current sensor for 1
Vrms at output.
IPk
Peak current, including IpPk (phase p current) including INPk
(neutral peak current)
IRms
RMS current, including IpRms (phase p current), INRms
(neutral RMS current). See 5.1.3 for definition.
 P
Instantaneous phase active
combined (fundamental and
nonfundamental) power,
including  Pp(phase p active
power). Minus sign indicates
generated and plus sign
indicates consumed power. See
5.1.5 for definitions.
P

Recorded phase active (fundamental and
nonfundamental) power, including Pp

(phase p active
power). Minus sign indicates generated and plus sign
indicates consumed power. See 5.1.5 for definitions.
 Ptot
Instantaneous total active
combined (fundamental and
nonfundamental) power. Minus
sign indicates generated and
plus sign indicates consumed
power. See 5.1.5 for definitions.
Ptot

Recorded total active (fundamental and nonfundamental)
power. Minus sign indicates generated and plus sign
indicates consumed power. See 5.1.5 for definitions.
 Pfund
Instantaneous active fundamental power, including
Pfundp(phase p active fundamental power). Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
Pfund+
Recorded phase active fundamental power, including
Pfundp

(phase p active fundamental power). Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
 P+,  P+tot
Instantaneous positive sequence of total active
fundamental power. Minus sign indicates generated and
plus sign indicates consumed power.
See 5.1.5 for definitions.
P+tot

Recorded positive sequence of total active fundamental
power. Minus sign indicates generated and plus sign
indicates positive sequence of consumed power.
See 5.1.5 for definitions.
27
0
0
Lead
1800
900
00
+P
-P
I
II
III IV
+P-P
27
0
0
Lead
1800
900
00
+Ptot
I
II
III IV
+Ptot
-Ptot
-Ptot

MI 2892 Power Master Introduction
14
 PH
Instantaneous phase active harmonic power, including
 PHp (phase p active harmonic power). Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
PH

Recorded phase active harmonics power, including PHp

(phase p active harmonic power). Minus sign indicates
generated and plus sign indicates consumed power. See
5.1.5 for definitions.
 PHtot
Instantaneous total active harmonic power. Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
PHtot

Recorded total active harmonics power. Minus sign
indicates generated and plus sign indicates consumed
active power. See 5.1.5 for definitions.
 PFind
 PFcap
Instantaneous phase combined
(fundamental and
nonfundamental) power factor,
including  PFpind/cap (phase p
power factor). Minus sign
indicates generated power and
plus sign indicates consumed
power. Suffix ind/cap
represents inductive/capacitive
character.
Note: PF = DPF when harmonics are not present. See
5.1.5 for definition.
PFind

PFcap

Recorded phase combined
(fundamental and
nonfundamental) power factor.
Minus sign indicates generated
power and plus sign indicates
consumed power. Suffix
ind/cap represents inductive/
capacitive character. This
parameter is recorded separately for each quadrant as
shown on figure.
 PFetotind
 PFetotcap
Instantaneous total effective combined (fundamental and
nonfundamental) power factor.
Minus sign indicates generated power and plus sign
indicates consumed power. Suffix ind/cap represents
inductive/capacitive character. See 5.1.5 for definition.
27
0
0
+PFind
+PFcap
-PFcap
-PFind
1800
900
00
+P-P
-Q
+Q
I
II
III IV
27
0
0
PFind+
PFcap+
PFcap-
PFind-
1800
900
00
+P-P
-Q
+Q
I
II
III IV

MI 2892 Power Master Introduction
15
PFetotind

PFetotcap

Recorded total effective combined (fundamental and
nonfundamental) power factor.
Minus sign indicates
generated power and plus sign
indicates consumed power.
Suffix ind/cap represents
inductive/capacitive character.
This parameter is recorded
separately for each quadrant
as shown on figure.
Plt
Phase long term flicker (2 hours), including Pltpg (phase p
to phase g long term voltage flicker) and Pltp (phase p to
neutral long term voltage flicker). See 5.1.9 for definition.
Pst
Short term flicker (10 minutes) including Pstpg (phase p to
phase g short term voltage flicker) and Pstp (phase p to
neutral voltage flicker). See 5.1.9 for definition.
Pst(1min)
Short term flicker (1 minute) including Pst(1min)pg (phase p
to phase g short term voltage flicker) and Pst(1min)p (phase
p to neutral voltage flicker). See 5.1.9 for definition.
Pinst
Instantaneous flicker including Pinstpg (phase p to phase g
instantaneous voltage flicker) and Pinstp (phase p to
instantaneous voltage flicker). See 5.1.9 for definition.
 N
Instantaneous combined (fundamental and
nonfundamental) nonactive phase power including  Np
(phase p nonactive phase power). Minus sign indicates
generated and plus sign indicate consumed nonactive
power. See 5.1.5 for definition.
Nind

Ncap

Recorded phase combined
(fundamental and
nonfundamental) nonactive
power including Ncap/indp(phase
p nonactive phase power).
Suffix ind/cap represents
inductive/capacitive character.
Minus sign indicates generated
and plus sign indicates consumed fundamental reactive
power. This parameter is recorded separately for each
quadrant as shown on figure. See 5.1.5 for definition.
 Qfund
Instantaneous fundamental reactive phase power
including
 Qp(phase p reactive phase power). Minus sign
indicates generated and plus sign indicates consumed
fundamental reactive power. See 5.1.5 for definition.
27
0
0
PFetotind+
Lead
Lag
PFetotcap+
PFetotcap-
PFetotind-
1800
900
00
+P-P
-Q
+Q
I
II
III IV
27
0
0
Nind+
Lead
Lag
Ncap-
Ncap+
Nind-
1800
900
00
+P-P
-Q
+Q
I
II
III IV

MI 2892 Power Master Introduction
16
Qfundind

Qfundcap

Recorded phase fundamental
reactive power. Suffix ind/cap
represents inductive/capacitive
character. Minus sign indicates
generated and plus sign
indicates consumed
fundamental reactive power.
This parameter is recorded
separately for each quadrant as
shown on figure. See 5.1.5 for definition.
 Q+totcap
 Q+totind
Instantaneous positive sequence of total fundamental
reactive power. Suffix ind/cap represents inductive/
capacitive character. Minus sign indicates generated and
plus sign indicates consumed reactive power. See 5.1.5
for definition.
Q+totind

Q+totcap

Recorded positive sequence of total fundamental reactive
power. Suffix ind/cap represents inductive/capacitive
character. Minus sign indicates generated and plus sign
indicates consumed reactive power. This parameter is
recorded separately for each quadrant.
S
Combined (fundamental and nonfundamental) phase
apparent power including Sp(phase p apparent power).
See 5.1.5 for definition.
Setot Combined (fundamental and nonfundamental) total
effective apparent power. See 5.1.5 for definition.
Sfund
Phase fundamental apparent power, including Sfundp
(phase p fundamental apparent power). See 5.1.5 for
definition.
S+tot Positive sequence of total fundamental effective apparent
power. See 5.1.5 for definition.
Sᴜfundtot Unbalanced fundamental apparent power. See 5.1.5 for
definition.
Sɴ
Phase nonfundamental apparent power, including Sɴp
(phase p nonfundamental apparent power). See 5.1.5 for
definition.
SeɴTotal nonfundamental effective apparent power. See
5.1.5 for definition.
SнPhase harmonic apparent power, including Sнp(phase p
harmonic apparent power). See 5.1.5 for definition.
Seнtot Total harmonic effective apparent power. See 5.1.5 for
definition.
THDI
Total harmonic distortion current (in % or A), including
THDIp (phase p current THD) and THDIN (neutral current
THD). See 5.1.7 for definition
27
0
0
Qind+
Lead
Lag
Qcap-
Qcap+
Qind-
1800
900
00
+P-P
-Q
+Q
I
II
III IV

MI 2892 Power Master Introduction
17
THDU
Total harmonic distortion voltage related (in % or V)
including THDUpg (phase p to phase g voltage THD) and
THDUp (phase p to neutral voltage THD). See 5.1.10 for
definition.
u-Negative sequence voltage ratio (%). See 5.1.10 for
definition.
u0Zero sequence voltage ratio (%). See 5.1.10 for
definition.
U, URms
RMS voltage, including Upg (phase p to phase g voltage)
and Up(phase p to neutral voltage). See 5.1.2 for
definition.
U+
Positive sequence voltage component on three phase
systems. See 5.1.10 for definition.
U-Negative sequence voltage component on three phase
systems. See 5.1.10 for definition.
U0Zero sequence voltage component on three phase
systems. See 5.1.10 for definition.
UDi
p
Minimal URms½ voltage measured during dip occurrence
Ufund
Fundamental RMS voltage (Uh1 on 1st harmonics),
including Ufundpg (phase p to phase g fundamental RMS
voltage) and Ufundp(phase p to neutral fundamental RMS
voltage). See 5.1.7 for definition
UhN,
nth voltage RMS harmonic component including UpghN
(phase p to phase g voltage nth RMS harmonic
component) and UphN(phase p to neutral voltage nth RMS
harmonic component). See 5.1.7 for definition.
UihN
nth voltage RMS interharmonic component including
UpgihN(phase p to phase g voltage nth RMS interharmonic
component) and UpihN(phase p to neutral voltage nth
RMS interharmonic component). See 5.1.7 for definition.
Nth RMS interharmonic voltage component measured
between phases. See 5.1.7 for definition.
UInt Minimal URms½ voltage measured during interrupt
occurrence.
UNom Nominal voltage, normally a voltage by which network is
designated or identified.
UPk
Peak voltage, including UpgPk (phase p to phase g
voltage) and UpPk (phase p to neutral voltage)
URms½
RMS voltage refreshed each half-cycle, including UpgRms½
(phase p to phase g half-cycle voltage) and UpRms½
(phase p to neutral half-cycle voltage). See 5.1.11 for
definition.

MI 2892 Power Master Introduction
18
USwell Maximal URms½ voltage measured during swell
occurrence.
USig
Mains signalling RMS voltage, including USigpg (phase p to
phase g half-cycle signalling voltage) and USigp(phase p
to neutral half-cycle signalling voltage). Signalling is a
burst of signals, often applied at a non-harmonic
frequency, that remotely control equipment. See 5.2.6 for
details.

MI 2892 Power Master Description
19
2 Description
2.1 Front panel
Figure 2.1: Front panel
Front panel layout:
1. LCD Colour TFT display, 4.3 inch, 480 x 272 pixels.
2. F1 – F4 Function keys.
3. ARROW keys Moves cursor and select parameters.
4. ENTER key Step into submenu.
5. ESC key Exits any procedure, confirms new settings.
6. SHORTCUT keys Quick access to main instrument functions.
7. LIGHT key
(BEEP OFF)
High intensity LCD backlight on/off
If the LIGHT key is pressed for more than 1.5 seconds,
beeper will be disabled. Press & hold again to enable it.

MI 2892 Power Master Description
20
8. ON-OFF key Turns on/off the instrument.
9. COVER Communication ports and microSD card slot protection.
2.2 Connector panel
Warnings!
Use safety test leads only!
Max. permissible nominal voltage
between voltage input terminals and
ground is 1000 VRMS !
Max. short-term voltage of external power
supply adapter is 14 V!
Figure 2.2: Top connector panel
Top connector panel layout:
1 Clamp-on current transformers (I1, I2, I3, IN ) input terminals.
2 Voltage (L1, L2, L3, N, GND) input terminals.
3 12 V external power socket.
Figure 2.3: Side connector panel
Side connector panel layout:
1 MicroSD card slot.
2 PS/2 – RS232 / GPS serial connector.
3 Ethernet connector.
4 USB connector.