Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Mega Manuals
  4. Measuring Instruments
  5. MEg39.1
  6. User manual

Mega MEg39.1 User Manual

Pq monitor
Hide thumbs

Advertisement

Quick Links

Download this manual
PQ monitor MEg39.1
User manual
MEgA – Měřící Energetické Aparáty, a.s.
MEgA – Měřící Energetické Aparáty, a.s.
664 31 Česká 390
664 31 Česká 390
Czech Republic
Czech Republic

Advertisement

loading
Need help?

Need help?

Do you have a question about the MEg39.1 and is the answer not in the manual?

Questions and answers

Related Manuals for Mega MEg39.1

Summary of Contents for Mega MEg39.1

  • Page 1 PQ monitor MEg39.1 User manual MEgA – Měřící Energetické Aparáty, a.s. MEgA – Měřící Energetické Aparáty, a.s. 664 31 Česká 390 664 31 Česká 390 Czech Republic Czech Republic...
  • Page 3 PQ monitor MEg39.1 1/ INTRODUCTION The MEg39.1 PQ monitor is designed for indirect measurement of four voltages and four currents at HV level. It has one galvanically isolated two-stage input and two controlled independent output contacts. It is fitted with USB, RS485 and ETH interfaces. It can optionally include a GSM module and a GPS module.
  • Page 4 DC supply voltages. It also has a power supply for supply- ing a safe small DC voltage with a nominal value from 24 V to 48 V. The MEg39.1 also includes a short-term uninterruptible power supply.
  • Page 5 3/ DESCRIPTION OF THE INSTRUMENT 3.1 Design The MEg39.1 PQ monitor in Fig. 1 is designed for fixed installation on a DIN TS35 rail. It is housed in a polycarbonate self-extinguished box measuring 108 × 90 × 61 mm. Fig. 1 also shows the protection module for disconnection of PROT39 current circuits.
  • Page 6 MEg39.1. The corresponding voltages can be connected to both power connectors at the same time. On the unit‘s panel is a green RUN LED indicator indicating the activity of the MEg39.1. The RUN LED indicator states are described in Table 1.
  • Page 7 PQ monitor MEg39.1 – user manual Fig. 1: Dimensions of the MEg39.1 with hinged cover and drawing of the PROT39 protection module U1 U2 U3 U4 Nm IN G U1 U2 U3 U4 Nm IN G IN G U1 U2 U3 U4 Nm...
  • Page 8 The panel indicates the type of the MEg39.1 monitor, S/N serial number and QR code with a description of the monitor. On the right side of the MEg39.1 monitor is a rating plate specifying the nominal values of measured voltages, currents, frequency, supply voltage and input power of the unit and safety pictograms.
  • Page 9 PQ monitor MEg39.1 – user manual Tab. 1: Description of MEg39.1 elements Item Group name Description Voltage Five-pole disconnectable terminal block U1, U2, U3, U4 and inputs Nm for connection of phase voltages L1, L2, L3, voltage UL4 and neutral conductor or ground...
  • Page 10 Měřící Energetické Aparáty Item Group name Description GSM antenna Angled connector with a latch mechanism for connecting a GSM antenna GPS antenna Angled connector with a latch mechanism for connecting a GPS antenna SIM card NANO SIM card goes into the indicated slot RUN LED −...
  • Page 11 PROT39 current circuits with I = 5 A or 1 A protections Figure 3: Examples of rating plates of the MEg39.1 monitor Standard version of MEg39.1 with disconnectable terminal block and screwing MEg39.1 Made in Czech Republic...
  • Page 12 150 V. The nominal value of AC voltage frequency is 50 Hz. 3.2 Functions of the monitor The MEg39.1 PQ monitor is an accuracy class A or class S instrument whose meas- urement methods meet the Class A requirements of EN 61000-4-30, ed.3. The meas- urement methods and uncertainties of the measured quantities are tested according to EN 62586-2 and the effects of operating conditions according to the procedures specified...
  • Page 13 To synchronize the function of multiple monitors, the positive zero-crossing of the first phase fundamental harmonic voltage can be used. The MEg39.1 PQ monitor allows secure data transmission, e.g. via IKEv2/IPsec and 2TP/IPsec protocols. The SSH protocol can be used to connect for management of the Linux Debian system, running on the ARM core of the processor and enabling the im- plementation of advanced communication and other superstructure functions.
  • Page 14 Měřící Energetické Aparáty 3.2.2 Measuring functions The scope of measured variables depends on the measurement connection and measure- ment parametrisation. Measured data can be divided into data of continuous phenomena of voltage quality, data during one-off voltage phenomena and events related to currents, recorder data, electric meter function data.
  • Page 15 PQ monitor MEg39.1 – user manual − Moments when the limits for interruption, dip and swell of voltage and current are exceeded − Residual and maximum values of voltage, maximum values of current − Courses of voltage U and currents I...
  • Page 16 4/ MEASURING AND COMMUNICATION CONNECTION, CONNECTION OF INPUTS AND OUTPUTS The MEg39.1 PQ monitor is designed for measurements at high voltage level even under the most demanding operating conditions. The measuring voltage terminals U1, U2, U3 and U4 have protective impedances and comply with CAT III / 150 V.
  • Page 17 + and – terminals. The – terminal is connected to the common terminal of the PQ monitor, see Fig. 4. Warning! If a small DC voltage source is used to supply the MEg39.1 with current sen- sors with grounded terminal S1, the small DC voltage source must not have its positive pole grounded, and for current sensors with grounded terminal S2, only a galvanically free small DC voltage source must be used.
  • Page 18 Měřící Energetické Aparáty Fig. 4: Connecting the common terminals in the MEg39.1 with 5 A / 1 A inputs and sensor inputs (225 mV, 150 mV, 22,5 mV) 230VAC 220VDC 110VDC MEg39 I1´ I2´ I3´ I4´ 1A/5A 24-48V 230VAC 220VDC...
  • Page 19 PQ monitor MEg39.1 – user manual 5/ MEASURING CONNECTION WITH CURRENT TRANSFORMERS AND SENSORS, COMMUNICATION CONNECTION During three-phase measurement of line voltage, voltages U1, U2 and U3 must be con- nected in the counter-clockwise direction at which the device is calibrated.
  • Page 20 Měřící Energetické Aparáty Termi- nal No. Identification Function RS485 A (positive quiet signal level) RS485 B (negative quiet signal level) RF grounding S1, I1 Input terminal of current I1 S2, I1 Output terminal of current I1 S1, I2 Input terminal of current I2 S2, I2 Output terminal of current I2 S1, I3...
  • Page 21 PQ monitor MEg39.1 – user manual Fig. 5: Three-phase measurement of the line voltages and phase currents in a MV, HV and EHV network with grounded centre via the Meg39.1 PQ monitor without and with PROT39 protection. Mains voltage supply.
  • Page 22 Měřící Energetické Aparáty Fig. 6: Measurement of line voltages, voltage U0, phase currents and choke current in a compensated HV network. Power supply with line measured voltage U1-U2. Positive direction of energy flow Fuse disconnector OPVP-4 Cylinder fuse Fuse disconnector OPVP-2 10x38gG 1,0A 10x38gG 1,0A IN G...
  • Page 23 PQ monitor MEg39.1 – user manual Fig. 7: Measurement of line voltages and phase currents in Aron connection at the HV level. Supply voltage 220 V Positive direction of energy flow 220V OPVP-2 OPVP-2 10x38gG 10x38gG 1,0A 1,0A IN G...
  • Page 24 Měřící Energetické Aparáty Fig. 8: Connection of the MEg39.1 with current measurement by TORm toroids con- nected in secondary circuits of current transformers, 24 V power supply. Positive direction of energy flow OPVP-3 10x38gG 1,0A IN G IN G U1 U2 U3 U4 Nm...
  • Page 25 230V /220 110V OUT2 OUT1 220/110V 220/110V 24/48V 24 48V RS485 Fig. 10: Connection of the GPS and GSM antennas to the MEg39.1 and its connec- tion to the Ethernet network, power supply connection 230V 220V , 110V communication synchronization...
  • Page 26 An example of an interface is a VPN. When a GSM module is installed in the MEg39.1, the information about the connection via the GSM modem is integrated in the monitor. The following types of GSM networks are possible in which the modem is registered –...
  • Page 27 − Rekonfigurace (Reconfiguration); reconfiguration of system parameters − Chyba SW (SW error); a malfunction of the operating software has occurred. The MEg39.1 PQ monitor contains a LINUX system on an SD card that controls remote communication and security. LINUX can be in the following states: −...
  • Page 28 • When the PQ monitor MEg39.1 is used in a different way than it is specified by the manufacturer, the protection provided by the PQ monitor MEg39.1 can be impaired.
  • Page 29 1. The 120 mm long TS35 DIN rail should preferably be screwed horizontally to the installation site. 2. The MEg39.1 monitor unit is to be mounted on the DIN rail and secured with locks 13, see Fig. 2. 3. The voltage contacts U1, U2, U3 and possibly U4 of the five-pole disconnectable...
  • Page 30 A wiring example is shown in Figure 9. 8. Output galvanically free NO contacts of two relays of the MEg39.1 on terminals 1 and 2 of OUT1 and OUT2 outputs allow closing of circuits with DC rated voltage up to 30 V and current up to 0.27 A and circuits with AC voltage up to 30 V...
  • Page 31 LINUX starts approximately 1 minute after connecting supply voltage. 13. On the MEg39.1, check that the U1, U2, U3 and U4 LEDs are lit; they signal the status of the measured voltage at corresponding inputs according to Table 1.
  • Page 32 Měřící Energetické Aparáty Fig. 12: Confirmation of USB communication between MEg39.1 and an inspection computer 16. On the main bar, select “Měřidlo” (Meter) as shown in Fig. 13, which in the Samples view shows the values of connected line voltages and phase currents. To check the...
  • Page 33 PQ monitor MEg39.1 – user manual Fig. 14: Check of the correct connection of measured voltages and currents. A check of the correct connection of a GSM network antenna with sufficient GSM network signal intensity is indicated by a highlighted GSM network pictogram at the end of the main bar of the program.
  • Page 34 MEg39.1 8/ MAINTENANCE Caution • The repairs of the MEg39.1 universal monitor during the warranty period may only be carried out by the manufacturer’s skilled and trained personnel or by the manu- facturer’s service organizations.
  • Page 35 10×38gG T 1,0 A. 9/ DISPOSAL When the service life of the MEg39.1 PQ monitor is over, it must be recycled in waste disposal sites according to rules for electronic waste disposal. 10/ WARRANTY The MEg39.1 PQ monitor is covered by a 24-month warranty from the date of purchase, however not longer than 30 months from the date of release from the manufacturer’s...
  • Page 36 An order shall include the quantity of MEg39.1 PQ monitors, supplemented with re- quested optional functions and accessories. MEg39.1 PQ monitors can be ordered in accuracy class A or S according to EN 61000-4-30, ed.3. The MEg39.1 version has a disconnectable current terminal block with a screw connector.
  • Page 37 − Three/four TORm toroids (1 A / 5 A) − Three/four TORv toroids (10 A / 50 A) − Three/four split-core LCT transformers (LCT-10, LCT-16, LCT-24, LCT-36) Technical data are provided in Chapter “GSM and GPS antennas of the MEg39.1 PQ monitor” Other lengths are available Ordering scheme: MEg39.1...
  • Page 38 12/ TECHNICAL PARAMETERS General information The MEg39.1 PQ monitor meets the measurement category CAT III / 150 V according to EN 61010-2-30 and the overvoltage category CAT IV / 300 V on the mains supply input. The MEg39.1 PQ monitor is classified, according to EN 62586-1, as PQI-A-FI1-H or PQI-S-FI1-H.
  • Page 39 PQ monitor MEg39.1 – user manual Power supply Stabilisation period: 10 minutes after start-up Nominal supply voltage U 230 V / 50 Hz, 220 V , 110 V , 48 V , 24 V Range of supply voltage: 90 V to 300 V for terminals 230 V∿ | 220|110 V⎓...
  • Page 40 Měřící Energetické Aparáty Voltage inputs U1, U2, U3 and U4 Nominal phase voltages U 100/√3 V nP-N Nominal line voltages U 100 V nP-P Measuring range of phase voltages: double U nP-N Maximum output voltage P-N: 150 V Maximum output voltage P-P: 260 V Voltage measurement uncertainty P-P, cl.
  • Page 41 PQ monitor MEg39.1 – user manual Current measuring uncertainty ±0.2 % M.V. ± 0.025 % I (45 Hz to 60 Hz) Change of value with temperature: 0.05 % I / 10 K Input impedance of current inputs: 2 MΩ / 47 pF...
  • Page 42 Měřící Energetické Aparáty ETH communication Speed: 10 / 100 Mbps Ethernet, Standard: Ethernet version 2.0/IEEE 802.3 Protocols for data reading: MODBUS TCP, IEC 60870-5-104, DLMS/COSEM, VPN protocols: L2TP/IPsec, IKEv2/IPsec Management: SSH (including central management of user access by means of the RADIUS or TACACS+ protocol), SNMP, SYSLOG Other properties: Firewall, static routing, dynamic routing protocols...
  • Page 43 Class A RMS1/2 Note: According to EN 61557-12, the MEg39.1 universal monitor is a measuring device of the PMD SS class (performance measuring and monitoring device) with current and voltage measurement by means of sensors. The MEg39.1 PQ monitor combines recording, power and voltage quality measurements.
  • Page 44 Měřící Energetické Aparáty Measurement uncertainties and measurement ranges of voltage quality parameters at testing states 1, 2 and 3 according to EN 61000-4-30, ed. 3...
  • Page 45 PQ monitor MEg39.1 – user manual Overview of evaluated quantities in record function evaluated values during measurement of phase voltage evaluated values during measurement of line voltage Quantity Symbol Effective voltage F, S F, S Voltage harmonics – 1st to 64th harmonic...
  • Page 46 In the recorder function, the 200 ms maxima and 200 ms minima are evaluated for phase voltages and 200 ms maxima for phase currents at each recording interval. Note: The MEg39.1 PQ monitor is configured by default to measure line voltages.
  • Page 47 PQ monitor MEg39.1 – user manual AGSM AND AGPS ANTENNAS OF THE MEg39.1 UNIVERSAL PQ MONITOR Antennas AO-AKOM-36SS/MEgA AO-ALTE-G214S/MEgA GSM/UMTS/LTE/GPS GSM/UMTS/LTE Frequency bands MHz 800 / 900 / 1700 / 1800 700 / 800 / 900 / 1700 1900 / 2100 / 2600 1800 / 1900 / 2100 / 2600 2700 /1757.42...
  • Page 48 Měřící Energetické Aparáty Antennas AP-AGPS-36/MEgA AP-A20C-M5RA/MEgA Frequency bands MHz 1575.42 1575.24 Gain 30 dBi 32 dBi VSWR < 2.0 : 1 < 2.0 : 1 Impedance 50 Ω 50 Ω Direction omnidirectional omnidirectional HPBW H 360° V 30° H 360° V 30°...
  • Page 49 The low-loss protection module for disconnecting current circuits is designed for use pri- marily in the MEg39.1 PQ monitor. It can also be used elsewhere. It enables the discon- nection of secondary current circuits of measuring current transformers with a nominal current of 5 A or 1 A without the need to mechanically short-circuit them in a shorting current terminal block.
  • Page 50 Měřící Energetické Aparáty Technical data of the TORm toroid Nominal input current I 1 A, 5 A Output voltage 225 mV , 150 mV , 22.5 mV Measuring range: 5 % to 120 % I Measurement error at f=50Hz 0.5 % from the range Harmonics measurement uncertainty ±...
  • Page 51 PQ monitor MEg39.1 – user manual Examples of the evaluation of data measured by the MEg39.1 program MEgA Explorer Measuring function Záznamník (Recorder). Average and extreme values with time data of voltages, currents, active and reactive powers of compensated HV lines...
  • Page 52 Měřící Energetické Aparáty Measuring function Napěťové jevy (Voltage phenomena) Standard parameters of voltage phenomena Contingency table of voltage drops Graph of resistance against voltage phenomena...
  • Page 53 PQ monitor MEg39.1 – user manual Record of voltage drops and current phenomena over the entire measurement period Record of the time courses of U and I during a voltage drop RMS1/2 RMS1/2...
  • Page 54 Měřící Energetické Aparáty Oscillographic time courses of line voltages and phase currents at interphase short circuit on 2021-07-30, from 18h11m37.350s to 18h11m37.918s...
  • Page 55 PQ monitor MEg39.1 – user manual Measuring function Elektroměr (Electric meter) Cumulative three-phase energies in a HV compensated network with phase diagram Monthly table of HV outlet energies Measuring function Kvalita napětí (Voltage quality), selected examples Weekly voltage quality information...
  • Page 56 Měřící Energetické Aparáty Harmonic voltages in week 31 of measurement Table of voltage quality...
  • Page 57 [2] User Description of DV_MEg, www.e-mega.cz/DL [3] User Description of MEgA Explorer, www.e-mega.cz/DL [4] User Description of WebDator2, on request [5] User Description of MEgA Merci Multi, www.e-mega.cz/DL MANUFACTURER MEgA – Měřící Energetické Aparáty, a.s. 664 31 Česká 390, Czech Republic Tel.
  • Page 58 10/ Warranty ......................35 11/ Orders ........................36 12/ Technical parameter .....................38 AGSM and AGPS antennas of the MEg39.1 universal PQ monitor ......47 PROT39 module of low-loss protection for disconnecting current circuits ....49 Technical data of the TORm toroid................50 Examples of the evaluation of data measured by the MEg39.1 program MEgA Explorer ....................51...
  • Page 60 PQ monitor MEg39.1 User manual MEgA – Měřící Energetické Aparáty, a.s. 664 31 Česká 390 Czech Republic www.e-mega.cz Edition: 02/2024...