Mega Meg39 User Manual

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PQ monitor MEg39

User manual

Měřící Energetické Aparáty, a.s.

664 31 Česká 390 Czech Republic

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PQ monitor MEg39 – user manual

PQ monitor MEg39

INTRODUCTION

PQ monitor MEg39 measures four voltage and four current values at LV, MV, HV levels. It provides the functions of recording, electricity meter and analysis of voltage quality, all performed simultaneously. In the recording function, PQ monitor MEg39, hereinafter referred to as the monitor, processes all measured values, evaluates powers, energy and harmonics up to the order of 64. In the function of class A voltage quality analyser, the monitor evaluates all parameters for measured three voltages and three currents, as stipulated by the standard. It analyses harmonics and centered subgroups of interharmonics up to the order of 125. When recording events, the monitor, aside from recording the course of U and current. e monitor can operate as an oscillograph with the function of recording the voltage values U1 to U4 and current values I1 to I4 into data memory; an oscillographic record can be triggered by voltage U4.

RMS1/2

and I

, makes an oscillographic record of all four values of voltage

RMS1/2

e voltage measuring inputs are designed for indirect voltage measurements by means of instrument transformers for the MV and HV levels and for direct measurements at the LV level. e current inputs are only designed for indirect measurements by means of instrument current transformers.

e monitor is supplied by power mains voltage or by DC voltage and it is resistant against short-term power outages. e device can be powered by DC 12 V from a separate UPS supply MEg101.3. is power supply is connected through the HBUS connector located in the DIN rail on which the device is installed. is bus connector enables connecting a communication unit MEg202.3, which enables remote transmission of data from the device by means of GPRS data service using the GSM mobile network. e monitor is equipped with four communication interfaces. e serial USB interface is designed for local parameterization of the device and for downloading of measured data, the Ethernet and RS485 interfaces are designed for connecting to local technological networks and the RS232 interface is reserved for service purposes.

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INFORMATION ON SW

PQ monitor MEg39 package includes a CD with user programs. Parameterization of measurements, reading of measured data, displaying of direct measurements, including an oscillographic recording, are carried out by the SW PQ program. Unied program Data Viewer ensures displaying of measured data in graphic and tabular form of a data le, export of measured data and printing tasks. Functions of the mentioned programs are described in separate user manuals [1], [2]. e database based program WebDatOr, supplied separately, is ready to take care of work with data les from one or more measurement instruments, even of dierent types [3].

BASIC INFORMATION ON MONITOR MEg39

PQ monitor MEg39, Fig.1, is designed for xed mounting in LV, MV and HV networks. e MEg39 unit is installed in a polycarbonate self-extinguishing box with the dimensions of 108 × 90 × 63 mm with the design for DIN rail mounting. e monitor is installed under the switchgear box cover with a possibility of sealing to restrict access to the terminals. e instrument panel can be sealed, too. Input terminals of measured voltages and currents, power supply and communication lines are realized by means of screw terminals for a wire diameter of up to 4 mm

. Measured voltages are led to the corresponding terminals U1 (36), U2 (34), U3 (32), U4 (30) and N (28). e four yellow LEDs U1, U2, U3 and U4 signalize by permanent light the presence of input voltages within preset tolerances. If a measured voltage is beyond preset tolerances, the corresponding LED ashes shortly, see the description of LED voltage indicators in Table 1. e unit panel also contains a green LED indicator RUN, signalizing the operation of the MEg39 unit.

Measured currents are led to the pairs of terminals I1 (2,3), I2 (4,5) and I3 (6,7), I4 (8,9) whilst the current input terminal is marked by a dot.

Supply voltage is connected to the terminals L (16) and N (18).

Two-value input signal is led to the IN (24,25) terminals, the 25 terminal is positive. e output signal OUT (26,27) is realized by means of the relay contact.

e miniUSB connector located on the panel of the unit is designed for local communication. Remote communication is realized by means of the RS485 interfaces at the terminals 22 and 23. Furthermore, it is possible to use the Ethernet interface, whose RJ45 connector is located at the panel of the unit and it enables using the functions provided by the built-in webserver.

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PQ monitor MEg39 – user manual

Fig. 1 – Designation of elements of PQ monitor MEg39 – description in Table 1

1 2 3 4

8 10

17 18

8 9

Tab. 1: Description of device components

Item Name Description

Voltage inputs

Terminals for connecting signals of the secondary windings of instrument voltage transformers for the MV and HV levels or for direct connecting of phase voltages at the LV level.

Current inputs

miniUSB

Terminals for connecting signals of the secondary windings of instrument current transformers. e input is marked with adot.

USB 2.0 interface connector for local communication

connector

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Item Name Description

Měřící Energetické Aparáty

RJ45 connector

Status of LED indicator

RUN

Status of measured voltages U1, U2, U3, U4

ETHERNET 100BaseTx interface connector for connecting in local network.

• e green LINK_LED signalizes data line speed (lit 100 Mbit/s / not lit 10 Mbit/s)

• e orange ACTIVITY_LED light signalizes a data transmission in progress

Short ashing – the monitor is performing measurements according to the programmed parameterization.

Repeated short ashing – the monitor has been programmed but is not measuring yet, because the preset time of measurement start has not come yet or the supply has not switched on due to programmed measurement with delayed start.

Alternating light 1:1 – oscillographic recording.

Signalization of the status of voltage at the inputs U1, U2, U3 and U4 during measurement at the LV level (Y-connection) or U1-U2, U2-U3, U3-U1 during measurement at the MV and HV level (delta connection).

Light:

• constant – voltage is within the preset tolerance range

to 1.1 Un)

(0.9 U

• one ash – voltage is within the preset range of interruption

• two ashes – voltage is within the preset range of dip

• three ashes – voltage is the preset range of swell.

GPS antenna connector

DIN rail lock

Power supply terminals

Connector for connecting a coaxial cable of antenna for receiving GPS time synchronization signal.

Orange locks situated at the top and bottom of the device must be unlocked for dismantling the device from the DIN rail.

Terminals for connecting power supply voltage

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PQ monitor MEg39 – user manual

Item Name Description

Input and

output signal terminals

HBUS bus

connector

Rating

plate

SAFETY INFORMATION

• is information must be read very carefully.

• Warnings warn of issues representing safety risks to operating personnel.

• Cautions state conditions and issues that could result in damage to the monitor.

Warning

• Attention! Operating personnel performing installation of the device into circuits with live parts must be equipped with and use during installation personal protective means and other safety equipment.

Terminals for connecting two-state signals and data interfaces RS485 and RS232.

Bus connector for interconnecting with UPS supply MEg101.3 and communication unit MEg202.3 (HBUS is installed between the device base and DIN rail)

e rating plate contains data valid for the specic version of the monitor

• Any use of PQ monitor MEg39 in a way for which it has not been des igned by the ma nufacturer can impair the protection provided by the PQ monitor MEg39.

• Personnel performing installation of the device must be qualied for work under and near hazardous voltage. ey must also be trained in providing rst aid.

• e monitor can only be operated by qualied personnel.

• Maintenance and repairs of the monitors can only be carried out by the manufacturer or service organizations trained by the manufacturer.

• It is not permitted to use any other accessories than those included in supply of amonitor.

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Caution

e meaning of symbols used in the user manual and in descriptions of the PQ monitor MEg39:

Note in documentation / Warning, risk of danger

Warning, electric shock hazard

CAT III

Overvoltage category, characterizing the state of temporary overvoltage. Usually for LV installations in buildings, behind electric energy meter fuses

Safety class II, double or reinforced insulation

IP code

Degree of protection by cover Product is designated for recycling and waste-collecting facilities

Declaration of compliance – European Community

e maximum voltage to the common conductor can be 300 VAC otherwise

there is a risk of damage to the monitor

Fig. 2: Dimensions of the device

11,2

62,2

108

89,7

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PQ monitor MEg39 – user manual

Fig. 3: Design of rating plate for measurements at the MV and HV voltage level

MEg39/cl. A

100V~ P-P, U 300V~ P-N

1A, I 1.2A

0 230V~ 10%,50Hz, 8VA/4W

00 300V 10%, 4W

Explanat ion to the rating plate

e rating plate of the monitor, see Fig. 3, is located on the left side of the cover. In addition to manufacturer‘s identication data and monitor designation, it includes specication of power supply voltage range and consumption for the stated power supply voltages.

Voltage inputs: Measurement at the MV and HV levels are delta U1-U2, U2-U3 and U3-U1 with the rated value of 100 V, voltage U4 is measured against the N input with the rated voltage of 100 / √3 V.

e maximum voltage value at the inputs U1, U2, U3 and U4 against N is 300 VAC.

Connected to the current inputs I1, I2, I3 and I4 are the secondary windings of instrument current transformers with the rated current of 1 A.

e measuring range of the current inputs is up to 1.2 In.

max

Made in Czech Republic

max

MEASURING CONNECTION WITH INSTRUMENT MEASURING TRANSFORMERS IN A MEASURING CHAIN

In MV and HV networks, measurements are indirect via measuring instrument transformers.

For three-phase voltage measurement it is necessary to connect voltages U1, U2 and U3 in the left rotation direction, at which the device is calibrated.

When measuring is performed at the MV level and the voltage input U4 is not used, it is recommended to connect this input with the N input.

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Fig. 4: ree-phase measuring of line to line voltages and phase currents in MV and

HV voltage with earthed center

(U/100/ )V

Positive

direction of energy flow

(U/100/ )V

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PQ monitor MEg39 – user manual

Fig. 5: Measurement of line to line voltages, U0 voltage, phase currents, I0 current

in a compensated MV network

(U/100/ )V

Positive direction

of energy flow

(U/100/ )V

(U/100/3)V

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Fig. 6: Measurement of line to line voltages and phase currents in the Aron connection

at the MV network

Positive

direction of energy flow

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Fig. 7: Measurement of phase voltages, voltage between neutral conductor and ground

and phase currents including phase currents dierence

Positive

direction of energy flow

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Fig. 8: ree-phase measurement of voltage and current at the LV output and measure-

ment of phase voltage and current of another LV output

PEN

Positive direction of energy flow

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Fig. 9: Connection of device terminals

GPS antenna

I1 I2 I3 I4

max 30V 1A

RS485

80230VAC, 50Hz 90300VDC

RS232

250V/2A

Tab. 2: Description of the function of MEg39 terminals

Terminal number Function

1 2 I1 current input

3 I1 current output 4 I2 current input 5 I2 current output 6 I3 current input 7 I3 current output

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Terminal number Function

8 I4 current input

9 I4 current output 10 11 12 13 14 15 16 L (power supply) 17 18 N (power supply) 19 RS232 GND 20 RS232 Tx (DTE) 21 RS232 Rx (DTE) 22 RS485 B (negative idle level of signal) 23 RS485 A (positive idle level of signal) 24 IN_GND 25 IN+ 26 OUT 27 OUT 28 N 29 30 U4 31 32 U3 33 34 U2 35 36 U1

Měřící Energetické Aparáty

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PQ monitor MEg39 – user manual

MEASURED DATA

e range of measured data depends on connection for measurement and measurement parameterization. Measured data are divided into data of continuous phenomena of voltage quality, event data and recorder data.

Data of continuous phenomena of voltage quality (aggregation interval 10 min):

- Time of evaluation

- Voltage unbalance

- Frequency

- Voltage magnitude

- Voltage deviations U

over

, U

under

- Flicker Pst and Plt

- THDU

- DC component, fundamental harmonic up to 125th harmonic of voltage

- Centered subgroups of interharmonic component of voltage up to the order of 125

- Level of voltage signals

- Flagged data

- Currents

- Basic to 125th harmonics of currents

- Centered subgroups of interharmonic I up to the order of 125

Data at events :

- Time of event

- Event duration

- Moments when the limits for interruption, dip and swell of voltage and current are exceeded

- Residual and maximum values of voltage and current

- Curves of voltages U

and currents I

RMS1/2

- Oscillogram of voltage and current curves during event

- Harmonic voltages and currents during event

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Recorder data (aggregation interval from 1 s to ¼ h pursuant to measuring parameterization):

- Time of evaluation

- Voltage

- Currents

- Active powers

- Reactive powers

- PF

- THD

- Harmonic components of voltages up to the order of 64.

- Harmonic components of currents up to the order of 64.

- Active and reactive energy (6 registers for each phase)

e above stated data of continuous phenomena of voltage quality are stipulated for the voltages U1, U2, U3 and currents I1, I2, I3.

e above stated recorded data of events starting from an exceeding of the dened limits for voltages U1 to U4 and for currents I1 to I3 are recorded for all the stated values.

e above stated recorder data apply to voltages U1 to U4 and currents I1 to I4.

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PQ monitor MEg39 – user manual

INSTALLATION OF MONITOR, PREPARATION FOR MEASUREMENT

Connecting of power supply and measuring voltage circuits must be done in volta-

ge-free state.

It is not permitted to connect the voltage inputs to phase voltages higher than 300 VAC

and line to line voltages higher than 520 VAC in CAT III overvoltage category circuits.

Installation of the MEg39 monitor may only be performed by qualied personnel

equipped with personal protective means against electric shock and trained in pro-

viding the rst aid.

Monitor MEg39 is to be installed on DIN rail TC35, while due to reasons of safety against electric shock and increased resistance against external machanical impacts, requires covering of cover with terminals by cover panel. DIN rail should be preferentially in horizontal position, labels on device panel are readable from left to right.

On DIN rail can be installed also power supply MEg101.3a or MEg101.3b and GPRS communication unit type MEg202.3 if needed. Units are inter connected using HBUS connec tor.

Power supply connecting

MEg39 monitor can be supplied either directly by AC voltage or by DC voltage connected to power supply terminals 16 and 18 or by DC 12 V from the UPS MEg101.3 via the HBUS. Connected to terminals 16 and 18 can be AC voltage within the range from 90 V to 230 V or DC voltage from 100 V to 300 V, independent on polarity.

1. Terminals 16 and 18 of the monitor MEg39 are connected via the two-pole LV fuse disconnector with fuses 2 A / 500 V to the terminals L and N of the network and their connection is made with cables certied for installation in a LV cabinet.

2. After a temporary state with a duration of ca 1 s, when the processor is checking the function of all circuits, it is necessary to check the LED RUN status according to apreviously programmed measuring mode, see in Tab. 1.

Connecting of measured voltages

Measured voltage must always be led to the reference voltage input U1.

e monitor MEg39 can be used for single-phase measurements, too.

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Měřící Energetické Aparáty

3. For indirect measurements at the MV and HV level, the measuring voltage inputs are connected according to the wiring diagrams in Fig. 4 to Fig. 6 to the output terminals of voltage instrument transformers.

For direct measurements at the LV level, the measuring voltage inputs are connected to measured voltages at phases L1, L2 and L3 via the three-pole fuse disconnector with fuses 2 A / 500 V, see in Fig. 7.

When measuring phase voltage of another, non power-connected branch of the LV network by means of the measuring input U4, it is necessary to insert a one-pole fuse disconnector with a fuse between the U4 input of the MEg39 monitor and the measured voltage, see in Fig. 8.

4. When the fuse disconnector is switched „ON“, check the function of the LEDs U1, U2, U3 and U4, which signalize the status of measured voltage at the corresponding inputs.

Connecting measured currents

Connecting current circuits must be performed either with the power switched o or with short-circuited secondary winding of the current instrument transformer.

All current inputs of the monitor MEg39 have the same value of rated current of either 1 A or 5 A, depending on an order.

e type and rated value of primary current of the current instrument transformer is set by the user according to voltage level and required measured current at the place of installation.

5. Currents indirectly measured by measuring instrument transformers are connected via short-circuited current double terminals to the current inputs I1, I2, I3 and I4, as the case may be, of the monitor MEg39 according to Fig. 4 to Fig. 8. e secondary winding of the current transformer inserted in the L1 phase is connected to the I1 input, e secondary winding of the current transformer inserted in the L2 phase is connected to the I2 input, e secondary winding of the current transformer inserted in the L3 phase is connected to the I3 input. Similar procedure is used for connecting the current input I4, as necessary.

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PQ monitor MEg39 – user manual

To ensure a reliable function of the connection, it is recommended to earth the secondary circuit of each instrument transformer. Earthing of the secondary circuit is carried out at one point.

Start of measurements and check of correct wiring

6. Displayed on PC with opened Power Quality Monitor program [1] in the drop-down menu of connected devices is a pictogram of communication connection with the monitor, FW version and the monitor serial number. Captions of all buttons in the window are in bold letters, see in Fig. 10.

If the program Power Quality Monitor is launched and the monitor is disconnected or connected improperly, PC displays the window with the empty drop-down menu and the buttons are inactive, see in Fig. 11.

7. Pressing the button Settings MEg displays in the program window the parameterization of measurements, where it is necessary to ll in rst the identication data of measurement and then, according to measuring connection, to select one-phase or three-phase measurement, voltage level (in the case of MV/HV), transformer ratio of the instrument current transformers and other measurement parameters, as the case may be, see in [1].

An example of measurement parameterization is in Fig. 12

8. Pressing the button Start of measurement deletes all previously measured data stored in the device memory and launches measurements according to the newly selected parameterization. Pressing the button Measurement and selecting the RMS menu displays the window of measured values, their time courses and the phasor diagram. An example is in Fig. 13. It is necessary to check the measured values and the correct direction of installation of the current transformers.

9. Pressing the menu button Measurement and selecting the Samples menu displays harmonic components of measured voltages and currents, oscillographic curves and a phasor diagram showing the orientation of current directions to voltage directions. An example is in Fig. 14.

During measurement of line to line voltage and phase currents at the MV level there is aphase shift between voltage and current by ca 30°. is does not necessarily apply to the I4 current..

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Fig. 10: e main window of SW PQ when communication with MEg39 has been

established

Fig. 11: e main window of SW PQ when communication with MEg39 has not been

successfully established

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PQ monitor MEg39 – user manual

Fig. 12: An example of settings - measurement parameterization

Fig. 13: Measuring and inspection of connected values, a time course of eective values

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Měřící Energetické Aparáty

Fig. 14: Measurement and inspection of connected values, oscillographic curves and FFT

MAINTENANCE

Caution

• Repairs of the monitory during the valid warranty period may only be performed by trained and qualied personnel of the manufacturer or service organizations of the manufacturer.

• e monitor must not be exposed to eects of chemicals

• e monitor may only be transported in the original transport packaging supplied by the manufacturer

• Re-calibration of PQ monitors MEg39 class A is recommended every two years and PQ monitors MEg39 class S every three years from the date of purchase or previous calibration.

When used properly and in accordance with this manual, the monitor does not require any special maintenance. Only when the device is dirty, it should be cleaned thoroughly by moist cloth without any cleaning agents.

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PQ monitor MEg39 – user manual

BATTERIES

Used in the monitor are the following batteries:

• lithium battery CR2032 for real time clock circuit,

• supercapacitors with the declared operation life of 10 years.

DISPOSAL

When the monitor is put out of operation, it must be disposed of properly by recycling in waste collecting facilities according to the regulations for electronic waste handling.

WARRANTY

A warranty period of 24 months from the date of sale is provided for the monitor but no longer than 30 months after shipping from the manufacturer. Defects occurring during this warranty period and provably due to defective design, faulty craftsmanship or material defects shall be repaired by the manufacturer or manufacturer‘s service organization free of charge.

ORDERING

An order must contain quantity of PQ monitors MEg39, class A or S, requiren nominal voltage level (LV or MV/HV) and required nominal current range (1 A or 5 A).

Optional accessories:

• GPS antenna with 5 m or 10 m cable

• HBUS bus connector for connecting the communication unit and uninterruptible power supply

• uninterruptible power supply MEg101.3

• communication unit MEg202.3 for remote data transmission by means of the GPRS service

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Měřící Energetické Aparáty

TECHNICAL PARAMETERS

General information

e stated uncertainties of measurement apply to the reference conditions. e development and production of the monitor is in accordance with the standard of

ISO 9001.

Reference conditions

Ambient temperature: 23 °C ± 2 K Relative humidity: 40 % to 60 % Left-direction voltage system at the inputs U1, U2 and U3. Supply voltage: 230 V

, 50 Hz

Operating conditions

Operating temperature: -20 °C to +55 °C Settle time: 10 minutes Relative humidity: 10 % to 90 %, non-condensing

Storage

Storing temperature: -30 °C to +60 °C Protection against eects of water and chemicals Protection against long-term eect of UV-radiation

Desig n data

Dimensions: 110 × 90 × 63 mm Weight: 0.4 kg Protection: IP00 according EN 60 529 IP20 when installed into LV switchgear

with cover panel above device terminals Overvoltage category: CATIII / 300 V according to EN 61010-2-030 Safety class: II, reinforced insulation

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PQ monitor MEg39 – user manual

EMC

EN 61326-1:2006 Electrical equipment for measurement, control and laboratory use – EMC requirements Part 1: General requirements 31

Voltage on network terminals, electromagnetic interference

EN 55011 ed.3:2010 Industrial, scientic and medical equipment – Radio-frequency disturbance characteristics – Limits and methods of measurement

Emitted high-frequency electromagnetic eld

EN 61000-4-3 ed.3:2006 Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement techniques – Radiated, radio-frequency, electromagnetic eld immunity test

Power supply

Supply voltage terminals 16, 18: 90 VAC to 230 VAC ± 10 %, 50 Hz 100 VDC to 300 VDC ±10 % HBUS supply voltage: 8 VDC to 12 VDC (max 13 VDC) from uninterruptible

power supply MEg101.3 Consumption: 8 VA, 4 W / 230 V

4 W / 300 V 2 W / 12 V

Fuse type: FSK 00.1/500 mA-T, e fuse is located under the plastic cover located next to the power terminals 16 and 18.

e fuse can be changed only with the power supply voltage disconnected at terminals 16 and 18. Fuse is not connected in the circuit of power supply voltage 12 V over HBUS connector.

Backup supply without UPS: 3 s with charged supercapacitors, charging time – 5 min

Data memory

Capacity: 512 MB

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Měřící Energetické Aparáty

Measuring characteristics

A/D convertor: 16 bit Sampling frequency: 256 samples a period Antialiasing lter: digital lter of the FIR type Phase lock: controlled by passage of basic harmonic voltage U1 through zero Aggregation intervals: quality function – pursuant to the standard of EN 61000-4-30, ed. 2

recorder function – from 1 sec to 1/4 hour Aggregation synchronization: pursuant to the standard of EN 61000-4-30, ed. 2, Time base: ±1 sec in 24 hours at operating temperature,

when GPS signal not connected

Voltage inputs U1, U2, U3 and U4

SW setting of voltage level: LV MV and HV Rated phase voltages U JRated delta voltages UnP-P: 400 VAC 100 V

P-N: 230 VAC 100 / √3 V

Measuring range of phase voltages: 300 VAC 190 VAC Maximum input voltage P-N: 300 V

Uncertainty of voltage measurement with f = 50 Hz: 0.05 % rdg ± 0.025 % U

Frequency range: up to 7.2 kHz Input resistance: 1.68 MΩ Temperature coecient: 0.05 % / 10 K Measurement: direct indirect Max. voltage transforming ratio: none 999 kV / 100 V (optional SW PQ)

Current inputs

Rated current value I Current measuring range: 5 % I

: 1 A or 5 A

to 120 % In

Frequency range: 40 Hz to 7.2 kHz Current measurement uncertainty

= 1 A, 5 A: 0.05 % rdg. ± 0.025 % In (45 Hz to 60 Hz)

Temperature coecient: 0.02 % / 10 K Harmonic measurement uncertainties

= 1 A, 5 A: ± 5 % I

harm

at I

harm

a ± 0.15 % In at I

≥ 3 % In

< 3 % I

harm

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PQ monitor MEg39 – user manual

Uncertainties of measurement and measuring parameters of voltage quality in the testing states 1, 2, 3 according to the standard EN 61000-4-30, ed. 2

LV, MV, HV level, f = 50 Hz

Parameter Class Uncertainty Measuring range

Frequency A ± 2 mHz 42.5 Hz – 57.5 Hz

Voltage A ± 0.1 % U

Flicker P

A 5 % P

IEC 61000-4-15, ed. 2

10 % Un – 150 % U

Pst (0.2 – 10.0) 1 – 4 000 changes/min

Flicker P

inst, max

A 8 % P

= 1.0

sinus, right-angle

Voltage phenomena A Amplitude: ± 0.2 % U

Duration: ± 1 period

5 % Un – 150 % U

0.02 sec – 60 sec

Interruption A Duration: ± 1 period 0.02 sec – 180 sec

Asymmetry A ± 0.1 % 0.5 % u

0.5 % u0 – 5 % u

Harmonic voltages A 5 % U

0.05 % Un, U

Interharmonic voltages

A 5 % U

0.05 % Un, U

Signals in voltage A ± 5 % U

3 % Un ≤ U

harm

sig

, U

harm

, U

harm

for

≤ 15 % Un,

sig

≥ 1 % U

< 1 % Un

≥ 1 % U

< 1 % U

10 % – 200 % class 3 IEC 61000-2-4

0.5 % Un – 15 % U

– 5 % u

± 0.15 % Un pro 1 % Un ≤ U

≤ 3 % U

sig

Voltage deviations A ± 0.1 % Un 10 % Un – 150 % Un

Time base

S ± 1 sec in 24 hrs -

without GPS connection

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REFERENCES

[1] User description of SW PQ, www.e-mega.cz

[2] User description of Data Viewer, www.e-mega.cz

[3] User description of WebDatOr, www.e-mega.cz

MANUFACTURER

MEgA – Měřící Energetické Aparáty, a.s.

664 31 Česká 390, Czech Republic

Tel. +420 545 214 988

e-mail: [email protected]

web: www.e-mega.cz

Měřící Energetické Aparáty

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PQ monitor MEg39 User manual

Měřící Energetické Aparáty, a.s.

664 31 Česká 390 Czech Republic www.e-mega.cz

Edition: 2/2014