Lumel ND20 User Manual
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Lumel ND20 User Manual

Meter of network parameters
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METER OF NETWORK PARAMETERS
ND20
USER'S MANUAL
1

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Summary of Contents for Lumel ND20

  • Page 1 METER OF NETWORK PARAMETERS ND20 USER’S MANUAL...

  • Page 3: Table Of Contents

    2. METER SET ..............6 3. BASIC REQUIREMENTS AND OPERATIONAL SAFETY ..... 6 4. INSTALLATION ..............7 5. METER DESCRIPTION ............8 6. ND20 PROGRAMMING ............12 7. UPDATING OF SOFTWARE ............ 35 8. RS-485 INTERFACE ............37 9. ERROR CODES ..............60 10.

  • Page 5: Application

    APPLICATION The N20D meter is a digital programmable panel meter destined for the measurement of single-phase power network parameters (2-wire network) and 3-phase, 3,4-wire network in balanced and unbalanced systems with the simultaneous display of measured quantities on a LCD display.

  • Page 6: Meter Set

    · The removal of the meter housing during the guarantee contract pe- riod may cause its cancellation. · The ND20 meter is destined to be installed and used in industrial electromagnetic environment conditions. · One must remember that in the building installation, a switch or a cir- cuit-breaker should be installed.

  • Page 7: Installation

    INSTALLATION The ND20 meter is adapted to be fixed on a panel by means of holders. The fitting way is presented on the fig.1. Housing overall dimensions: 96 x 96 x 77 mm. At the rear side of the meter, there are screw terminal strips which enable the connection of external wires with a cross-section up to 2.5 mm...

  • Page 8: Meter Description

    METER DESCRIPTION 5.1 Current Inputs All current inputs are galvanically isolated (internal current transfor- mers). The meter is adapted to co-operate with external measuring cur- rent transformers. Displayed current values and derivative quantities are automatically recoun in relation to the introduced external current transformer ratio.
  • Page 9 Direct measure- ment in a 3-wire network Supply OUA1 pulse Semi-indirect measurement in a 3-wire network...
  • Page 10 Supply OUA1 pulse Indirect measurement with the use of 2 current transformers and 2 or 3 voltage transformers in a 3- wire network Direct measurement in a 4-wire network.
  • Page 11 Semi-indirect measurement in a 4-wire network. Indirect measurement with the use of 3 current trans- formers and 2 or 3 voltage transformers in a 4-wire network. Fig 3. Meter connection diagrams in a: a) single-phase network, b) 3-phase - 3 wire network, c) 3-phase - 4-wire network...

  • Page 12: Nd20 Programming

    ND20 PROGRAMMING 6.1 Frontal Panel Fig 4. Frontal panel Description of the frontal panel: 1 – abandon push-button – ESC 11 – units of displayed values 2 – push-button to displace to the left 12 – symbols of digital data 3 –...
  • Page 13 6.2 Messages after Switching the Supply on After switching the supply on, the meter performs the display test and display the ND20 meter name, rated current and voltage, the current program version, and next displays the measured values. where: n.nn is the number of...
  • Page 14 of harmonic energy, harmonic percentage values are displayed. Through push-buttons, one can switch between suc- cessive harmonics. The harmonic no is alternately displayed with the value. Through the RS-485 interface one can set up the values, that would be visualized (starting from version 1.02). The error display is described in the chapter 8.
  • Page 15 Backlit -, kWh symbols row 1 Uh1n* % Uh1n* % year cosinusj1 3phase exported imported harmonic harmonic Uh2n* % 1 Uh2n* % 1 row 2 cosinusj2 1 month active 3phase active. energy 1 energy 1 Uh3n* % 1 cosinusj3 1 row 3 Uh3n* % 1 3phase...
  • Page 16 Tablica 2a Backlit symbols -, kWh kvar kvar reactive reactive capacitive row 1 inductive energy imported exported energy Displayed active row 2 active values reactive energy energy reactive negative positive row 3 energy energy Displaying optional Displayed symbols row 1 year P 3phase Displayed...
  • Page 17 Performed calculations: Reactive power (the calculation method configured): − ∑ ∠ where k – harmonic number (k = 21 dla 50 Hz, k = 18 dla 60 Hz) Power factor PF: Tangens power: Cosinus: cosinus between U and I The exceeding of the upper indication range is signaled on the display by upper horizontal lines, however the exceeding of the lower range is signaled by lower horizontal lines.

  • Page 18: Operating Modes

    6.4 Operating modes Fig. 6. Operating modes of the ND20 meter.
  • Page 19 6.5. Parameter Settings Fig 7. Setup menu The entry in the programming mode is carried out through the pressure and holding down of the push-button during ca 3 sec. The entry in the programming mode is protected by the access code. If there is not such a code, the program transits into the programming option.
  • Page 21 6.5.1 Setting of Meter Parameters Select the PAr mode in options (by push-buttons) and approve the choice by the push-button. Table 3 Introduction oFF, of the ac- 1 ... 0 - without code cess code 60000 Ratio of tr_I 1 ... the current 10000 transformer...
  • Page 22 Way to trGLE, calculate SInUS − TrGle: reactive power ∑ SInUS: ∠ trGLE k - harmonic number, k = 21 for 50 Hz, k = 18 for 60 Hz Way to En_q cAP, cAP – inductive and capacitive calculate SIGn energy reactive SIGn –...
  • Page 23 Values are set by means of push-buttons, however the position of the set digit is selected by means of push- buttons. The active position is signaled by the cursor. The value is accepted by the push-button and resigned by the pressure of the push-button.
  • Page 24 Operating mode of the continuous Output nor, output: operation Antr AnOL, nor – normal work, mode AnOh AnOL – set value AnOL, AnOH – set value AnOH, Output value AnEr 0 ... 24 in mA at error Number of 1000 ... Io_n Number of impulses for 1 kWh 5000...
  • Page 25 Lower value -144.0 ... of the input ALoF in % of the rated quantity value 144.0 range Upper value -144.0 ... of the input ALon in % of the rated quantity value 144.0 range Time in seconds (for quantities AL_n =P_ord delay of the ALdt 0 ...
  • Page 26 Selection of the monitored value: Table 6 Item/ value splay- Value for the percentage in re- Kind of quantity conversion of alarm valu- gister para- es and outputs (100%) 4015 meter lack of quantity /alarm disabled/ none voltage of phase L1 Un [V] * current in the phase wire L1 In [A] *...
  • Page 27 tg j coefficient of phase L3 mean 3-phase voltage Un [V] * mean 3-phase current In [A] * 3-phase active power 3 x Un x In x cos(0°) (P1 + P2+ P3) [W] * 3-phase reactive Power 3 x Un x In x sin(90°) (Q1 + Q2 + Q3) [var] * 3-phase apparent Power...
  • Page 28 b) n-off c) On d) OFF Fig. 9. Alarm types: a),b) normal c) enabled d) disabled Remaining types of the alarm: – H-on – always enabled; – H-oFF – always disabled, – A3non – when the “n-on” alarm type occurs on any of the phases –...
  • Page 29 Measuring current transformer 2500/5 A, voltage :230 V, Instantaneous maximum import of power: 1.5 MW. Calculate: rated 3-phase active power of the ND20 meter: P = 3 x 230 V x 2500 A (500 * 5 A) = 1.725 MW (500 * 3450 W) – 100%;...

  • Page 30: Setting Date And Time

    An example of the parameter value utilization of ordered active power to switch the alarm on is presented on the fig. 10. The time delay is set on 0 sec. In the calculated e x a m p l e , f o r remaining 10% of ordered power, at...
  • Page 31 6.5.5. Setting of displayed values Select the dISP mode in options and approve the choice by the push-button. Table 7 Displayed parameters in the row 1 - 3 Phase voltages U_Ln oFF, on Phase-to-phase voltages U_LL oFF, on Phase currents I_Ln oFF, on Active phase powers...
  • Page 32 3-phase active, reactive, apparent oFF, on power Displayed parameters in the row 4 Three-phase mean current oFF, on Current in neutral wire oFF, on Three-phase active power oFF, on Three-phase reactive power oFF, on Three-phase apparent power oFF, on Three-phase mean power factor PF PF_A oFF, on Three-phase mean Tangent j factor...
  • Page 33 6.7. Archive – Active Power Profile The ND20 meter is equipped with an archive allowing to store up to 9000 measurements of mean active power. Mean active power PAV is archived with a 15, 30, 60 minutes’ interval of time, synchronized with the real time clock.
  • Page 34 The archive is organized in the shape of a circular buffer. After writing the 9000 th value, the next overwrites the oldest with number 0, and the successive, the next with number 1, etc. If the value of the register 1000 is higher than 1001, that means that the buffer was overflowed one time at least.

  • Page 35: Updating Of Software

    UPDATING OF SOFTWARE Function enabling updating of software from the computer of the PC with software LPCon was implementation in meter ND20 (from software version 1.09). Free software LPCon and update files are accessible on the site www.lumel.com.pl. The connected to the computer converter RS485 is required on USB to the updating, e.g.: the converter PD10.
  • Page 36 After starting LPCon’s software COM port, baudrate, transmission mode and adress should be set. It can be done in Options. Then, ND20 meter should be selected from Device. Push icon Load to read and save current settings. Open window Lumel Updater (LU) – figure 13b from Updating- >Updating of devices firmware.

  • Page 37: Rs-485 Interface

    RS-485 INTERFACE The implemented protocol is compliant with the PI-MBUS-300 Rev G, Modicon. Parameter set of the serial ND20 meter link: · identifier 0xBC · meter address: 1..247 · baud rate 4.8, 9.6, 19.2, 38.4 kbit/s, · working mode Modbus RTU, ·...
  • Page 38 Response: Device Fun- Num- Register Number of address ction ber of address registers Control bytes 0FA0 0FA1 (4001) (4000) E4 6F . Readout of 2 registers 32-bit of float type as 2 registers Example 2 16-bits, starting with the register with the 1B58h (7000) address - register values 10, 100.
  • Page 39 Response: Value from Value from Value from Value from register register register register Con- 1770h 1770h 1772h 1772h trol (6000) (6000) (6002) (6002) E4 6F Readout of 2 registers 32-bit of float type, starting with the Example 4 . register with the 1D4Ch (7500) address - register values 10, 100. Request: Device Function...
  • Page 40 Response: Device Function Register Number of address address registers Control sum CA 54 Recording to n-registers (code 10h) Recording 2 registers starting with the register with the Example 6 . 0FA3h (4003) address recorded values 20, 2000. Request: Value for Value for register register...
  • Page 41 30 34 20 Map of ND20 meter registers In the ND20 meter, data are placed in 16 and 32-bit registers. Process variables and meter parameters are placed in the address area of registers in a way depended on the variable value type. Bits in 16-bit registers are numbered from the youngest to the oldest (b0-b15).
  • Page 42 7000 – 7319 Float Value placed in two successive 16-bit registers. (2x16 Registers include the same data as 32-bit registers bits) from the area 7500 – 7659. Registers for readout. Sequence of bytes (3-2-1-0). 7500 – 7659 Float Value placed in one 32-bit register. The table 12 (32 bits) includes the register description.
  • Page 43 Hour * 100 + minute of archived mean power with 1010 number NrBL + 1 Value of archived mean power with number NrBL + 1 1011 float type – 4 bytes in sequence 3-2-1-0 1012 1073 Year of archived mean power with number NrBL + 14 Month * 100 + day of archived mean power with number 1074 NrBL + 14...
  • Page 44 Synchronization of mean active power: 0 – 15 minutes’ walking window (record synchronized every 15 minutes with the clock) 4005 0..3 1 – measurement synchronized every 15 minutes with the clock 2 – measurement synchronized every 30 minutes with the clock 3 –...
  • Page 45 Erasing of watt-hour meters: 0 – without changes, 1- erase active energy, 4011 0...4 2 – erase reactive energy, 3 – erase energy of harmonics, 4 – erase all energy. Erasing of mean active power 4012 Erasing of the averaged power 4013 archive 4014...
  • Page 46 -2000..0.. Lower output range value of the 4025 2000 output [10 uA] [10uA] 1..2000 Upper output range value of the 4026 2000 [10uA] output [10 uA] Manual switching of the analog output 1: 0 – normal work, 4027 0..2 1 – set value from the register 4026, 2- set value from the register 4027, 0..24...
  • Page 47 Exportedactive energy, two 4040 0..15258 older bytes exported active energy, two 4041 0..65535 younger bytes Reactive inductive energy, two 4042 0..15258 older bytes Reactive inductive energy, two 4043 0..65535 younger bytes Reactive capacitive energy, two 4044 0..15258 older bytes Reactive capacitive energy, two 4045 0..65535 younger bytes...
  • Page 48 4059* 0..65535 reserved 4060* 0..65535 reserved Register of status 2 - description 4061* 0..65535 below In parenthesis [ ], suitably is placed: resolution or unit. * starting from version 1.09 Energy is made available in hundreds of watt-hours (var-hours) in double 16-bit register, and for this reason, one must divide them by 10 when calculating values of particular energy from registers, ie: Imported active energy = (register 4038 value x 65536 + register 4039 value) /10 [kWh]...
  • Page 49 Register of status 2 - nature of the reactive power (address 4061, R): Bit 9 – „1” – capacitive 3L Bit 15 – reserved Bit 8 – „1” – capacitive L3 maximum Bit 14 – „1” – alarm indication in phase L3 (only for alarm type: Bit 7 –...
  • Page 50 Configuration register of displayed parameters of standard values 2 (address 4056, R/W): Bit 15 ...6 – reserved Bit 2 – „1” – displaying of phase active powers Bit 5 – „1” – displaying of power ∑P, Bit 1 – „1” – displaying of phase ∑Q, ∑S currents Bit 4 –...
  • Page 51 Table 12 √ √ 6000/7000 7500 Voltage of phase L1 √ √ √ 6002/7002 7501 Current in phase L1 √ √ 6004/7004 7502 Active power of phase L1 √ √ 6006/7006 7503 Reactive power of phase L1 √ √ 6008/7008 7504 Apparent power of phase L1 √...
  • Page 52 √ 6042/7042 7521 Mean 3-phase voltage √ √ 6044/7044 7522 Mean 3-phase current √ √ 6046/7046 7523 3 - p h a s e a c t i v e p o w e r (P1+P2+P3) √ √ 6048/7048 7524 3-phase reactive power (Q1+Q2+Q3) √...
  • Page 53 √ √ 6086/7086 7543 3-phase mean cosinus ° √ √ 6088/7088 7544 Angle between U1 and I1 ° √ 6090/7090 7545 Angle between U2 i I2 ° √ 6092/7092 7546 Angle between U3 i I3 √ 6094/7094 7547 Current in neutral wire (calculated from vectors) √...
  • Page 54 √ √ 6110/7110 7555 3-phase reactive capacitive kvarh energy ( counter totting up to 99999.9 kVarh) √ 6112/7112 7556 Imported 3-phase active harmonic energy (number of overflows in register 7557, reset after exceeding 99999999.9 kWh) √ 6114/7114 7557 Imported 3-phase active harmonic energy (counter totting up to 99999.9...
  • Page 55 √ √ 6144/7144 7572 Current L2 min √ √ 6146/7146 7573 Current L2 max √ √ 6148/7148 7574 Current L3 min √ √ 6150/7150 7575 Current L3 max √ √ 6152/7152 7576 Active power L1 min √ √ 6154/7154 7577 Active power L1 max √...
  • Page 56 √ √ 6200/7200 7600 Tgj factor of phase L1 min √ √ 6202/7202 7601 Tgj factor of phase L1 √ 6204/7204 7602 Tgj factor of phase L2 min √ 6206/7206 7603 Tgj factor of phase L2 √ 6208/7208 7604 Tgj factor of phase L3 min √...
  • Page 57 √ √ 6242/7242 7621 3-phase apparent power max √ √ 6242/7244 7622 Mean power factor (PF) min √ √ 6246/7246 7623 Mean power factor (PF) max √ √ 6248/7248 7624 Mean Tgj factor min √ √ 6250/7250 7625 Mean Tgj factor max √...
  • Page 58 √ √ 6290/7290 7645 Cosinus of angle between U1 i I1 max √ 6292/7292 7646 Cosinus of angle between U2 i I2 min √ 6294/7294 7647 Cosinus of angle between U2 i I2 max √ 6296/7296 7648 Cosinus of angle between U3 i I3 min √...
  • Page 59 √ √ 6440/7920 7720 I1 - harmonic 2 … … … … … √ √ 6478/7958 7739 I1 - harmonic 21 √ 6480/7960 7740 – h a r m o n i c … … … … … √ 6518/7998 7759 I2 - harmonic 21 √...

  • Page 60: Error Codes

    ERROR CODES During the meter operation, messages about errors can occur. Reasons of errors are presented below. -when the voltage or current is too small when measuring: Err1 - PFi, tgji, cos, THD, harmonic below 10% Un, - PFi, tgji, cos, below 1% In, - THD, harmonic below 10% In ,...
  • Page 61 error of phase sequence, one must interchange the Err L2 L3 connection of phase 2 and phase 3. One can disable the message by the push-button. Each time you power up, the message will be displayed again. - lower overflow. The measured value is smaller than ____or _____ the lower measuring quantity range.

  • Page 62: Technical Data

    TECHNICAL DATA Measuring ranges and admissible basic errors Table 13 Measured Indication Measuring Basic value range* range error Current In 0.00 ... 12 kA 0.002 ... 1.200 A~ ±0.2% r 0.00 ... 60 kA 0.010 ... 6.000 A~ Voltage L-N 57.7 V 0.0 ...
  • Page 63 Power input:  6 VA - in supply circuit  0.05 VA - in voltage circuit  0.05 VA - in current circuit dedicated display LCD 3.5’’ Display field: relay, voltageless NO contacts Realay output: load capacity 250 V~/ 0.5 A ~ current 0(4) ...
  • Page 64 Reference and rated operating conditions - supply voltage 85..253 V a.c. (40...400) Hz or 90..300 V d.c. 20..40 V a.c. (40...400) Hz or 20..60 V d.c. - input signal: 0...0.002...1.2 I ; 0.05...1.2 U for current, voltage 0...0.002...1.2 I ; 0...0.1...1.2 U for power factors Pf frequency 47...63 Hz sinusoidal (THD ...
  • Page 65 Standards fulfilled by the meter: Electromagnetic compatibility: - noise immunity acc. to EN 61000-6-2 - noise emissions acc. to EN 61000-6-4 Safety requirements: according to EN 61010 -1 standard isolation between circuits: basic installation category: pollution level: maximum phase-to-earth voltage: - for supply and measuring circuits 300 V - for remaining circuits...
  • Page 66 11. ORDERING CODES Table 14 Meter of network parameters ND20 - X Current input In: 1 A (X/1) 5 A (X/5) Voltage input (phase/phase-to-phase) Un: 3 x 57.7/100 V 3 x 230/400 V Analog current output: without analog output with programmable output 0(4) ... 20 mA Supply voltage: 85..253 V a.c., 90..300 V d.c.
  • Page 67 When ordering please respect successive code numbers. The code: ND20- 2-2-1-1- 00- E-1 means: ND20 – meter of network parameters of ND20 type 2 – current input In : 5 A (x/5), 2 – input voltage (phase/phase-to-phase) Un = 3 x 230/400 V, 1 –...

  • Page 68: Maintenance And Guarantee

    11. MAINTENANCE AND GUARANTEE The ND20 meter does not require any periodical maintenance.In case of some incorrect operations: After the dispatch date and in the period stated in the guarantee card: One should return the instrument to the Manufacturer’s Quality In- spection Dept.
  • Page 72 LUMEL S.A. ul. Słubicka 1, 65-127 Zielona Góra, POLAND tel.: +48 68 45 75 100, fax +48 68 45 75 508 www.lumel.com.pl, e-mail: lumel@lumel.com.pl Export department: tel.: (+48 68) 45 75 139, 45 75 233, 45 75 321, 45 75 386 fax.: (+48 68) 32 54 091...

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