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Měřící Energetické Aparáty

28

 Uninterruptible power supply MEg102

1/ PUrPosE 

The  uninterruptible  power  supply  MEg102  serves  for  short-term  power  supply  of  the 

instrument MEg40

+

 in case of supply voltage interruptions or drops. In accordance with 

ČSN EN 61000-4-30 ed. 2, its use is necessary for registration of short-term voltage events 

up to 3 min.

2/ FUnction dEscriPtion

The power supply MEg102 generates rectangular output voltage with a frequency equal 

to the frequency of the network or with a lower frequency in case of an input voltage 

failure.  The  accumulator  and  its  keeping  in  charged  condition  is  a  part  of  the  power 

supply unit MEg102. The input and output voltages of the power supply unit MEg102 

Содержание MEg40+

Страница 1: ...MEgA M c Energetick Apar ty a s MEgA M c Energetick Apar ty a s 664 31 esk 390 664 31 esk 390 Czech Republic Czech Republic Universal Energy Meter MEg40...

Страница 2: ......

Страница 3: ...rotected circuits of LV stations and substitutes classic pointer registering instruments and also four quadrant energy meters MEg40 stores all measured data in the Flash data memory for further proces...

Страница 4: ...ive energy 230V 5A U 0 8 Unom I 0 Cos L 0 5 Cos C 0 8 Class B according to TPM 2440 08 MI Voltage events Unom 0 05Ujm to1 20Unom T 1sec 1 0 Unom 20msec 5 6 Notes 1 Only the range is to be specified in...

Страница 5: ...delivery Phase currents Reactive energy L at consumption Active and reactive powers Reactive energy L at delivery U and I events Reactive energy C at consumption Maximum currents Reactive energy C at...

Страница 6: ...nforming to IEC 61000 4 2 4kV 15kV Immunity to radiated radio frequency fields conforming to IEC 61000 4 3 10V m 80MHz 2000MHz Immunity to fast transients conforming to IEC 61000 4 4 2kV Surge immunit...

Страница 7: ...ing to standard IEC 62053 23 see Fig 1 They are the following registers OBIS 1 1 1 8 0 EP active energy consumption OBIS 1 1 2 8 0 EP active energy delivery OBIS 1 1 5 8 0 EQL P reactive energy induct...

Страница 8: ...uency This allows a unified analysis of events in the course and also of long term measurement campaigns During a mains failure when internal time synchronization through the network frequency is sele...

Страница 9: ...band narrowed by the hysteresis of 2 Unom E g if the limits of 90 Unom and 110 Unom are selected then the limits to end an event are 92 Unom and 108 Unom Beside the time when an event occurred also t...

Страница 10: ...e instrument and prescribed data are specified on the front panel The rear panel includes vents two rows of terminal blocks with marked individual terminals rated current and rated voltage data and sa...

Страница 11: ...play mode of the function Monitor Press the buttons or to set the corresponding inversely displayed line and press the button Select to select the item on the set line After the main item Measuring in...

Страница 12: ...s the button Level selection the instrument made for the rated voltage 57 7V will accept MV MVL or HV levels and the instrument made for the rated voltage of 230V will accept only the LV level By sele...

Страница 13: ...al when the measured data are stored into the memory After you select the item Check of wiring four functions run automatically to check the wiring of connected measuring circuits for correctness They...

Страница 14: ...and below the instrument to remove heat from the instrument and install eccentrics which attach the instrument to the panel mechanically White eccentrics are to be inserted into profiled holes in the...

Страница 15: ...ed to measure currents made according to the pat No 286255 with the rated current from 100A to 900A and a window size of 68 68 mm Then the universal energy meter is in the version MEg40 S1 When it is...

Страница 16: ...n the basic version includes programming the measurement reading the measured data of USB2 0 communications and taking out the memory card with measured data and inserting an empty card if 16MB memory...

Страница 17: ...iled description of the data reading from the 16MB memory card is given in a separate chapter of this manual 7 Maintenance instructions The universal energy meter MEg40 does not include any movable pa...

Страница 18: ...s and list of delivered accessories are specified on the packaging For transport it is necessary to protect the front panel of the instrument with the display and inserted memory card against mechanic...

Страница 19: ...Specify extra requirement for memory CARD 16MB requirement for extended SW number of memory card readers number and length of communication cables MEg40 PC number of uninterruptible power supplies ME...

Страница 20: ...g 2 Wiring of the instrument MEg40 in LV network without uninterruptible power supply Fig 3 Wiring of the instrument MEg40 in a LV network with uninterruptible power supply MTP MTP MTP type MBS ASK 51...

Страница 21: ...Hole in front panel 92 x 92mm Fig 5 Rear panel of the instrument MEg40 left version with USB2 0 communication right version with RS485 RS232 communication I1k I1l I2k I2l I3k I3l U2 U3 Nm U1 MEg 40 P...

Страница 22: ...p Type Interval Manner Quantity Phase Feeder Value Value in 200ms 400ms 800ms 1 6s 3 2s 6 4s 12 8s Level Vo LV MV MVL Phase Phase to p HV Recorder State recording in action Recording since dd mm yy Me...

Страница 23: ...ase Phase to phase 20kV 22kV 35kV 110kV 220kV 400kV I prim I sec 1A 5A S1 S2 S3 Serial number Version of FW Memory capacity Date and time 1A 5A 10A 12 5A 15A 20A 25A 30A 40A 50A 60A 75A 100A 125A 150A...

Страница 24: ...M c Energetick Apar ty 24 Accessories of the universal instrument MEg40 16MB memory card and memory card reader...

Страница 25: ...the reader and transferred into PC it is possible to delete the data recorded on the card using a special confirmed command Then the card can be used to record data in any instrument MEg40 2 Operating...

Страница 26: ...onfiguration of the inserted cards is read out and it is possible to view heads of the measured data files on the individual memory card in detail After the measured data are read out from the memory...

Страница 27: ...nues storing the measured data onto this card It is also possible to insert a not deleted card which is marked by another instrument This wrong situation is alternately reported with the message Memor...

Страница 28: ...0 4 30ed 2 its use is necessary for registration of short term voltage events up to 3min 2 Function description The power supply MEg102 generates rectangular output voltage with a frequency equal to t...

Страница 29: ...s to the AC pulse voltage and transformed to Uoutp by the transformer T2 to power supply the instrument The voltage Uoutp is on the terminals of the power supply unit MEg102 The Uinp voltage drop belo...

Страница 30: ...C to 50 C Relative humidity 5 to 95 Safety SN EN 61010 Dimensions 115 65 40mm Weight 0 4kg Ingress protection rating IP20 Max cross section of input and output wires 3 0mm 4 Installation instructions...

Страница 31: ...it MEg102 can be impaired 5 Maintenance instructions The uninterruptible power supply units MEg102 do not contain any movable parts and therefore do not require any mechanical maintenance other than c...

Страница 32: ...is up to 1200m when the cabling system is correctly designed and has a suitable impedance end 2 Technical parameters Power supply voltage 6V to 16V current MEg40 not connected 20mA current MEg40 conn...

Страница 33: ...n Before installation FW must be installed in MEg40 allowing the addressing By default MEg40 with the USB interface includes FW for which no addressing is assumed The schematic diagram of converter in...

Страница 34: ...4 Fig 1 USBhost RS485 converter in version for MEg40 and MEg202 2 Fig 2 Detail of type plate of USBhost RS485 converter and communication unit MEg202 2 USB host RS485 konvertor SN A B 12V USB host RS4...

Страница 35: ...nection of USBhost RS485 converter and instrument MEg40 and communication unit MEg202 2 Universal Energy Meter MEg40 USB USB host RS485 12V B A T CHAN1 CHAN2 USB host RS485 12V B A T USB slave 1 2 3 4...

Страница 36: ...requency and therefore every network period Ts receives 32 data for each voltage and current referring its instantaneous values The RMS values are calculated from data sequences So for the voltage fro...

Страница 37: ...taneous values For calculation the formula 1 is used where K 32 The obtained RMS values of all three voltages are compared with the preset thresholds If it is found out that there is a voltage dip swe...

Страница 38: ...phase the coefficient of performance true power factor is used 6 particularly 1 2 3 The total outlet powers result from the powers in the individual phases In case of long term measurements a high num...

Страница 39: ...s Tz characteristic phase current values are obtained From the RMS current values I l obtained in the measuring time intervals Tm with the serial numbers l 1 2 L for the recording interval Tz the tota...

Страница 40: ...val T the active energy EPZ TZ PZ 15 and the reactive energy EQZ TZ QZ 16 was transmitted The above data characteristic for the recording intervals are obtained for all three phases Determination of t...

Страница 41: ...es of the total harmonic distortion and selected harmonics Statistical evaluation with subsequent displaying of results in the form of histograms and cumulative diagrams is also considered This applie...

Страница 42: ...energy transmitted during the time Tv is EPV TV PV 20 and the reactive energy similarly Data from the time interval Tv can be displayed depending on time and evaluated statistically It is also possibl...

Страница 43: ...M c Energetick Apar ty 43...

Страница 44: ...MEgA M c Energetick Apar ty a s 664 31 esk 390 Czech Republic www e mega cz Edition 03 2014 Universal Energy Meter MEg40...

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