Lumel ND20CT User Manual
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Lumel ND20CT User Manual

Power network meter
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ND20CT-09A User's manual
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Summary of Contents for Lumel ND20CT

  • Page 1 ND20CT-09A User's manual...

  • Page 2: Table Of Contents

    6.5.3 Setting of Alarm Parameters ....................18 6.5.4 Setting displayed quantities ....................22 7 UPDATING SOFTWARE ........................23 8 RS-485 INTERFACE .........................24 8.1 MAP OF ND20CT REGISTERS ....................26 9 ERROR CODES ..........................34 10 TECHNICAL DATA ..........................35 11 ORDERING CODES ........................38 12 ACCESSORIES ..........................38 12.1 LJ series current transformers with RJ12 connector ..............38...

  • Page 3: Application

    ND20CT-09A User's manual 1 APPLICATION ND20CT meter is a digital programmable panel meter designed to measure parameters of single- phase 2-wire and three-phase 3 and 4-wire power networks, working with external current transformers: - 3-phase with RJ12 connector and 100 mA output, LJ series integrated in one housing,...

  • Page 4: Installation

    ND20CT-09A User's manual 4 INSTALLATION The synchronizing unit is adapted to be fixed to the panel by means of holders, according to fig. 1. The housing of the meter is made of plastic. Housing dimensions are 96 x 96 x 77 mm. Outside the meter there are screw terminal strips that allow connection of external wires with a cross-section up to 2.5 mm...

  • Page 5: Meter Description

    ND20CT-09A User's manual 5 METER DESCRIPTION 5.1 Current inputs The meter is adjusted to work with external measuring current transformers with 100 mA outputs (RJ12 connector) or 250 mA outputs (screw terminals). Displayed values of currents and derivative quantities are automatically converted according to the introduced external current transformer ratio.
  • Page 6 ND20CT-09A User's manual supply RS 485 OUA1 OUpulse Zasilanie WYimp WYA1 GNDI 3S 2 2S 2 1S 1 23 22 17 16 ND20CT CT Input...
  • Page 7 ND20CT-09A User's manual OUpulse supply RS 485 OUA1 Zasilanie WYimp WYA1 GNDI 23 22 17 16 ND20CT Splitter ND20CT-303 CT Input...
  • Page 8 ND20CT-09A User's manual supply OUpulse OUA1 RS 485 Zasilanie WYimp WYA1 GNDI 23 22 17 16 ND20CT CT Input Fig. 3: Examples of meter connections: a) with a 1-phase current transformer with RJ12 output, b) with a 3-phase current transformer with RJ12 output, c) with 3 1-phase current transformers connected via a splitter, d) with a 3-phase current transformer with an output for screw terminals.

  • Page 9: Nd20Ct Programming

    ND20CT-09A User's manual 6 ND20CT 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 transmission 3 –...

  • Page 10: Messages After Switching The Supply On

    ND20CT-09A User's manual Messages after Switching the Supply on After switching the supply on, the meter performs the display test and displays the ND20CT meter name, version, serial number and the current program version. Fig. 5: Messages after starting the meter where: oooooooo is the serial number, r n.nn is the number of the current program version or the...
  • Page 11 ND20CT-09A User's manual Displayed symbols -, kWh kvarh kvarh kVAh ,% , THD U Reactive row 1 THD U1 % inductive Reactive energy capacitive energy Exported active Apparent Displayed row 2 energy THD U2 % values energy Reactive Reactive positiveenergy...
  • Page 12 ND20CT-09A User's manual Displayed symbols kVAh row 1 3phase Displayed row 2 Apparent energy 3phase values row 3 3phase Displaying optional optional Displayed quantities in the field 8 (fig. 5.) Table 2b Displayed symbols 3L, A 3L, W 3L, var...

  • Page 13: Operating Modes

    ND20CT-09A User's manual 6.4 Operating Modes:...

  • Page 14: Parameter Settings

    ND20CT-09A User's manual Fig. 6: Operating modes of the ND20CT meter 6.5 Parameter Settings For the configuration of ND20CT meters, we provide free eCon software available at www.lumel.com.pl. Fig. 7: Setup menu The entry in the programming mode is carried out through pressing and holding of the push- button during ca 3 sec.
  • Page 15 ND20CT-09A User's manual Fig. 8: Programming matrix...

  • Page 16: Setting Of Meter Parameters

    ND20CT-09A User's manual 6.5.1 Setting of Meter Parameters Select the PAr mode in options (by push-buttons) and approve the selection by the push-button. Table 3 Parameter name Desi- Range Notes / description Default gnation value 0 – without code Introduction of the oFF, 0…...

  • Page 17: Setting Of Output Parameters

    ND20CT-09A User's manual - for active energy when changing: voltage or current ratio; - for reactive energy when changing: voltage or current ratio, the way of reactive power calculation, reactive energy calculation; Values are set by means of push-buttons, however the position of the set digit is selected by means of push-buttons.

  • Page 18: Setting Of Alarm Parameters

    ND20CT-09A User's manual 6.5.3 Setting of Alarm Parameters Select the ALr1 mode in options and approve the choice by the push-button. Table Parameter name Desi- range Notes / description Default gnation value Quantity in the alarm output AL_n table 6 (code acc.
  • Page 19 ND20CT-09A User's manual current in outer conductor L3 In [A] * Un x In x cos(0°) [W] * active power of L3 phase Un x In x sin(90°) [var] * reactive power of L3 phase apparent power of L3 phase...
  • Page 20 ND20CT-09A User's manual when all alarms disappear.  A3_of – when alarm of off type occurs on any phase - the switching relay is switched on and relevant symbol lights up (AL1 – phase 1, AL2 – phase 2, AL3 – phase 3). It will be disabled only when all alarms disappear.
  • Page 21 ND20CT-09A User's manual  go to the PAor parameter and enter 57.9  go to the SYn parameter and set 15 (synchronization with a 15-minute moving window) or c_15 (clockwise synchronization every 15 minutes); the factory setting is 15 ...

  • Page 22: Setting Displayed Quantities

    ND20CT-09A User's manual 6.5.4 Setting displayed quantities Select the dISP mode in options and approve the choice by the push-button. Table 7 Parameter name Designation range Default value Parameters displayed in rows 1 - 3 Phase voltages U_Ln oFF, on...

  • Page 23: Updating Software

    After starting eCon the serial port, baud rate, mode and the meter address should be set in the settings. Next, select the ND20CT meter from the Devices menu and click on the Readout icon to read all the parameters set (needed for their later restoration). After selecting the option Update device firmware from the Update menu, the Lumel Updater window (LU) will open - Fig.

  • Page 24: Rs-485 Interface

    ND20CT-09A User's manual RS-485 INTERFACE The implemented protocol is in accordance with the PI-MBUS-300 Rev G of Modicon Company. The list of serial link parameters of ND20CT meter:  0xE3  meter address 1..247  baud rate 4.8, 9.6, 19.2, 38.4 kbit/s, ...
  • Page 25 ND20CT-09A User's manual Response: Device address Number of Value from the Value from the Value from the Value from the Checksum Function bytes register register register register 1B58 (7000) 1B59 (7001) 1B5A (7002) 1B5B (7003) E4 6F Example 3. Readout of 2 32-bit registers of float type as a combination of 2 16-bit registers starting with the register addressed 1770h (6000) - registers values 10, 100.

  • Page 26: Map Of Nd20Ct Registers

    8.1 MAP OF ND20CT REGISTERS In ND20CT meter the data is placed in 16- and 32-bit registers. Process variables and parameters of the meter are located in the address space of registers in a manner dependent on the type of the variable.
  • Page 27 ND20CT-09A User's manual Values placed in two successive 16-bit registers. Registers contain the Float 7000 – 7339 same data as 32-bit registers of 7500 – 7659 range. Read-only (2x16 bits) registers. Byres order (3-2-1-0) Float Value placed in one 32-bit register. Description of registers can be 7500 –...
  • Page 28 ND20CT-09A User's manual Output type: 0 – n-on, 1– n-oFF, 2 – on, 3 - oFF, 4 – H-on, 5 – H-oFF, 6 - A3non, 7 - A3nof, 4016 0..9 8 - A3_on, 9 - A3_of Lower alarm switching value -1440..0..1440...
  • Page 29 ND20CT-09A User's manual 4052 0..65535 Serial number, two younger bytes 4053 0..65535 Program version (*100) 4054 0..65535 Displayed parameters of standard values 0xFFFF 4055 0..65535 Displayed parameters of average values 0xFFFF 4056 0..65535 Displayed parameters of standard values 2 0xFFFF Measurement mode: 0->3Ph / 4W, 1->3Ph / 3W...
  • Page 30 ND20CT-09A User's manual Configuration register of displayed parameters of standard values (address 4054, R/W): Bit 15 – “1” – displaying cosine  Bit 8 – “1” – displaying active imported energy Bit 7 – “1” – displaying tg Bit 14 – “1” – displaying current THD Bit 6 –...
  • Page 31 ND20CT-09A User's manual   6046/7046 7523 3-phase active power (P1+P2+P3)   6048/7048 7524 3-phase reactive power (Q1+Q2+Q3)   6050/7050 7525 3-phase apparent power (S1+S2+S3)   6052/7052 7526 Power factor (PF) average   6054/7054 7527 ...
  • Page 32 ND20CT-09A User's manual 99999.9 kVAh) 6120/7120 7560 reserved 6122/7122 7561 reserved    Time – hours, minutes 6124/7124 7562 6126/7126 7563 reserved 6128/7128 7564 reserved 6130/7130 7565 reserved  6132/7132 7566 Consumed ordered power 6134/7134 7567 reserved 6136/7136 7568...
  • Page 33 ND20CT-09A User's manual   6220/7220 7610 coefficient of phase L3 min   6222/7222 7611 coefficient of phase L3 max   6224/7224 7612 Phase-to-phase voltage L   6226/7226 7613 Phase-to-phase voltage L   6228/7228 7614 Phase-to-phase voltage L ...

  • Page 34: Error Codes

    ND20CT-09A User's manual  6318/7318 7659 Cosine of angle between U3 and I3 max   6320/7320 7660 Average 3-phase cosine min   6322/7322 7661 Average 3-phase cosine max   ° 6324/7324 7662 Angle between U1 and I1 min ...

  • Page 35: Technical Data

    ND20CT-09A User's manual 10 TECHNICAL DATA Measuring ranges and admissible basic errors Table 11 L1 L2 L3 ∑ Measured quantity Indication range* Measuring range Basic error Current In 0.1 A 0.00 .. 999.9 A 0.0002 .. 0.1200 A   ...
  • Page 36 ND20CT-09A User's manual Power consumption:  6 VA - in supply circuit  0.05 VA - in voltage circuit  0.05 VA - in current circuit dedicated LCD display 3.5”, Display field Relay output relay, volt free NO contacts, load capacity 250 V~/ 0.5 A~ (AC1) current 0(4)…20…24 mA...
  • Page 37 ND20CT-09A User's manual - short-term overload (5s) voltage inputs 2 Un current inputs 5 In - operation position - warm-up time 5 min. Additional errors: in % of intrinsic error  due to frequency of input signals < 50% ...

  • Page 38: Ordering Codes

    * the numbering will be determined by the manufacturer, SAMPLE ORDER: The code ND20CT-2.1.1.00.P.1 - means a meter with input range of 3x 230/400 V, with programmable analog output 0(4) .. 20 mA, with supply voltage 85 ... 253 V a.c./ 90..300 V d.c. in standard version, Polish language version, with a quality inspection certificate.
  • Page 39 ND20CT-09A User's manual Standard equipment for 1-phase current transformers: LJ12 series transformer, with a connecting cable with an RJ12 connector, 1.5 m long - mounting set for rail mounting, Standard equipment for 3-phase current transformers: - LJ25, LJ35 or LJ45 series transformer including a connecting cable with RJ12 connector, 1.5 m long,...

  • Page 40: Current Transformers Of L3Xx Series For Screw Terminal Connection

    ND20CT-09A User's manual Current transformers 3 - phase, distance between conductor rails axes 45mm Designation Ratio Power /Precision class LJ45-272235S 000000 250/100mA 0.25VA/0.5 ,0.5VA/1 LJ45-312235S 000000 400/100mA 0.25VA/0.5 ,0.5VA/1 LJ45-332235S 000000 600/100mA 0.25VA/0.5 ,0.5VA/1 12.2 Current transformers of L3xx series for screw terminal connection The offer includes 3-phase L3xx transformers for connection to screw terminals.
  • Page 41 ND20CT-09A User's manual L3xx series 3-phase current transformers: L308: 63A L306: 125A...

  • Page 42: Splitter

    ND20CT-09A User's manual L307: 250A 12.3 Splitter When using LJ series 1-phase current transformers with RJ12 connector and 100 mA output, connection to the ND20CT meter is recommended to be done via the ND20CT-303 splitter. Standard equipment: - ND20CT-303 splitter, - connecting cable with RJ12 connector, 1.5m long...
  • Page 43 ND20CT-09A User's manual ND20CT-09A...

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