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Lumel ND31LITE User Manual

Power quality meter with modbus rtu (rs-485) protocol
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ND31LITE User manual
POWER QUALITY METER
WITH MODBUS RTU (RS-485) PROTOCOL
ND31
LITE
USER MANUAL
1

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Summary of Contents for Lumel ND31LITE

  • Page 1 ND31LITE User manual POWER QUALITY METER WITH MODBUS RTU (RS-485) PROTOCOL ND31 LITE USER MANUAL...
  • Page 2 ND31LITE User manual...

  • Page 3: Meter Set

    ND31LITE User manual APPLICATION The ND31LITE meter is a programmable digital instrument designed for the measurement of 1-phase 2-wire and 3-phase 3 and 4-wire power network parameters in balanced or unbalanced systems. The measured values are displayed on a 3,5’’ TFT full-color screen, resolution: 320 x 240 pixel. The me- ter enables control and optimization of the power electronic devices, systems and industrial installations.

  • Page 4: Basic Requirements, Operational Safety

    ND31LITE User manual Fig. 1. Meter set BASIC REQUIREMENTS, OPERATIONAL SAFETY In terms of operational safety the controller meets the requirements of the EN 61010-1 (incl. changes) standard. Remarks concerning safety: • The meter should be installed and connected only by a qualified personnel.

  • Page 5: Installation

    • Protection of the supply voltage path: Protect the supply voltage with an approved (UL / IEC) fuse: ND31LITE at 85-253V AC or 90-300V DC, 1.0 A, type C; • Protection of current measurement inputs: The meter allows current measurement via current transformers.

  • Page 6: Meter Description

    92.5 x 92.5 mm. There are screw terminal strips on the outer side of the meter which enable the connection of external wires of diameter up to 2.5 mm LITE Fig. 3. Overall dimensions of the ND31LITE meter METER DESCRIPTION 5.1.

  • Page 7: External Connection Diagrams

    ND31LITE User manual - Three-phase four-wire systems with grounded/ungrounded neutral conductor with a system voltage of 3x57.7/100 V to 3x230/400V. - Three-phase three-wire systems with grounded/ungrounded phase with a system voltage of 3x100 V to 3x400V, - Single-phase two-wire systems 1x57.7V to 1x400V 5.3.
  • Page 8 ND31LITE User manual Direct measurement in a 4-wire network * Fuses must be provided by the customer Semi-direct measurement in a 4-wire network * Fuses must be provided by the customer...
  • Page 9 ND31LITE User manual Indirect measurement in a 4-wire network * Fuses must be provided by the customer Fig.6.Connections of input signals in three-phase 4-wire network Direct measurement in a 3-phase network * Fuses must be provided by the customer...
  • Page 10 ND31LITE User manual Semi-direct measurement using 2 current transformers in a 3-wire network * Fuses must be provided by the customer Indirect measurement using 2 current transformers and 2 or 3 voltage trans- formers in a 3-wire network * Fuses must be provided by the customer...

  • Page 11: Front Panel

    ND31LITE User manual ND31LITE PROGRAMMING 6.1. Front panel Fig. 8. Front panel The ND31 meter has 6 buttons and a full-color graphic screen. Front panel description: f1, ... ,f8 8 field displays - the digits for readout and settings, Averaged value indicator (Demand)
  • Page 12 ND31LITE User manual The values of the measured parameters are shown on the active pages selec- ted by subsequent pressing the buttons (next page) or (previous page). The page consists any 8 values selected from the Table 1 and displayed si- multaneously on the display.

  • Page 13: Starting Work

    ND31LITE User manual 6.2. Starting work After switching the supply on, the meter displays the ND31LITE meter name, version, current software version and then moves to the measurement mode and last saved page.If during the power-up the displayed screen shift to the right or left is observed, it is possible to correct this shift by setting the appro- priate type of LCD display.

  • Page 14: Operating Modes

    ND31LITE User manual 7. OPERATING MODES The ND31LITE meter has 7 operating modes: Measure – normal work mode. In the Measure mode the values are displayed according to the pages that are preset at the factory or configured by the user.
  • Page 15 ND31LITE User manual Alarms Protection Protection Configura- Relay 1 Relay 2 tion  Off  Off  On  On Menu only visible when Supervisory Relay is off Alarm 1 Settings Logical Relay state if alarm Holdback Display alarm Default...
  • Page 16 ND31LITE User manual Settings Backlight level Time to ba- Screens cfg Screens color LCD Display Set screens cklight level type defaults min [s] 0180  Screensaver  Screen 1  Green  Type 1  No  Minimum  Screen 2 ...

  • Page 17: Measurement Mode

    ND31LITE User manual 7.1. Measurement mode In the Measure mode the values are displayed according to the screens that are preset at the factory or configured by the user in the Display mode. Changing the screen is done by pressing the buttons...

  • Page 18: Analog Indicator

    ND31LITE User manual Fig. 16. Screens 11 and 12 - visualization of harmonics 7.1.2. Analog indicator Screen 13 shows the mapping of the selected quantity on the analog indicator. The selection of displayed quantity is made in the Display mode as described in item 7.5, by selecting screen 13.

  • Page 19: Parameters Mode

    ND31LITE User manual department. Note 2: The valid range of values for the password is „0000 ... 9999”. Note 3: The factory default password is „0000” and the password lock function is disabled. Fig. 18. Screens while entering a password 7.3.
  • Page 20 ND31LITE User manual Fig. 19. Screens of Parameters mode Table 1 Default Item Parameter name Feature / value Description settings Type of power network 3 phase -4 wire 3-phase 4-wire 3 phase -4 Connection wire 3 phase -3 wire 3-phase 3-wire...
  • Page 21 (when entered value is too high) or minimum value (when it is too low). Free eCon software can also be used for configuration of the ND31 me- ters, it is available on the website www.lumel.com.pl.

  • Page 22: Alarms Mode

    ND31LITE User manual 7.4. Alarms mode In the options, select the Alarms mode and confirm selection by pressing the button Select When the supervisory relay is off...
  • Page 23 ND31LITE User manual When the supervisory relay is on:: Fig. 20. Screens of Alarms mode Table 2 Item Parameter name Range Notes / description Default settings Alarm configuration Protection Relay 1, 2 Logical conditions v – logic sum C1 v C2 v C3 ...
  • Page 24 ND31LITE User manual Values U1,I1,...,T2,hh:mm Value on the alarm output parameters acc. to Table 8 Condition 1 n_on, noFF, Acc. to Fig.17. n-on on,oFF, H_on, HoFF, 3non, 3noF, 3_on, 3_oF Low limit condition -144.0…144.0 in % of the rated input value 90.0...
  • Page 25 ND31LITE User manual High Threshold 5...140 Assymetry 1...30 Threshold ON State Delay [s] 0...3600 OFF State Delay [s] 0...3600 Alarm Hold ON Nie/Tak Reset Fig. 21. Condition types: a) n_on b) noFF c) on d) OFF...
  • Page 26 ND31LITE User manual Remaining types of the condition: • H_on – always true; • HoFF – always not true, • 3non – when the measuring value on any phase exceeds the „Condition upper value” - condition is true. The condition will be disabled if the mea- suring value on all phases will be lower than „Condition lower value”.
  • Page 27 ND31LITE User manual The alarm is activated when the measured value (rms. value) of the voltage or current (depends on the „Alarm type” parameter) on one, one of two or one of three phases (depends on the „Active phases count” parameter) drops below the value specified by the „Low threshold”...
  • Page 28 ND31LITE User manual deactivated when the measured value (rms value) of the voltage or current on one, two or three phases (depends on the „Active phases count” parameter) drops below the value specified by the „Low threshold” parameter. At that mo- ment, the alarm deactivation delay time („OFF State Delay”...
  • Page 29 ND31LITE User manual to zero, the transmitter will be switched on/off simultaneously when the alarm is switched on/off. Alarm type: „Phase Failure” The principle of the alarm is analogous to that of the type alarm:„Undervoltage.”, „Undercurrent” Alarm types: „Asymmetry (Volt.)”, „Asymmetry (Curr.)”...
  • Page 30 ND31LITE User manual For this type of alarm, the parameter „Active phases count” must be set to two or all phases. Alarm type: „Phase Sequence” If a change in the phase sequence is detected, the alarm activation delay time („ON State Delay” parameter) begins to count down. After this time the alarm is activated and the transmitter enters the state defined by the para- meter „Relay State during Alarm”.

  • Page 31: Display Mode

    ND31LITE User manual 7.5 Display mode In this mode, you can configure the screens displayed in a normal work mode of the meter Measurement Fig.22. Screens of Analog output mode Table 3 Item Parameter name Range Notes/description Default settings Back light level...
  • Page 32 ND31LITE User manual Screen 13 Displayed value Selection of the visualized quantity on the analogue indicator according to table 5g Bottom scale -0144.0 The lower value of the analog indicator scale Upper scale +0144.0 The upper value of the 100.0 analog indicator scale The Backlight level parameter is used to set the intensity of the LCD backlight.
  • Page 33 ND31LITE User manual L1 phase active power (G,M,k)W   L1 phase reactive (G,M,k)var   power L1 phase apparent (G,M,k)VA   power L1 phase active power   factor (PF1=P1/S1) tg factor of L1 phase   (tg1=Q1/P1)
  • Page 34 ND31LITE User manual L3 phase voltage (M,k)V  L3 phase wire current (k)A   L3 phase active power (G,M,k)W  L3 phase reactive (G,M,k)var  power L3 phase apparent (G,M,k)VA  power L3 phase active power  factor (PF3=P3/S3) tg...
  • Page 35 ND31LITE User manual phase-to-phase voltage (M,k)V   L1-L2 phase-to-phase voltage (M,k)V   L2-L3 phase-to-phase voltage (M,k)V   L3-L1 mean phase-to-phase U123 (M,k)V   voltage active power averaged P DMD (G,M,k)W    (P Demand) apparent power avera-...
  • Page 36 ND31LITE User manual * In the 3-phase 3-wire system (3Ph / 3W) respectively THD U12, THD U23, THD U31, THD U123 ** The quantities can not be visualized on the analogue indicator Default settings of the displayed screens in 3-phase 4-wire system...
  • Page 37 ND31LITE User manual Table 7 U1 V S1 VA P1 W P DMD W P1 W En P+ kWh I1 A S1 VA S DMD W Q1 var En P- kWh P1 W I1 A I DMD A S1 VA...
  • Page 38 ND31LITE User manual 3-phase active power 3 x Un x In x cos(0°) [W] * P (P1+P2+P3) 3-phase reactive power 3 x Un x In x sin(90°) [Var] * Q (Q1+Q2+Q3) 3-phase apparent power 3x Un x In [VA] * S...

  • Page 39: Modbus Mode

    ND31LITE User manual 7.6. Modbus mode In the options, select the Modbus mode and confirm your choice by pressing the button Select Fig.23. Screens of Modbus mode Table 9 Item Parameter name Feature / value Description Manufacturer’s value Address 1…247...

  • Page 40: Information Mode

    ND31LITE User manual Table 10 Item. Parameter name Feature / value Description Manufacturer’s value Password 0 .. 9999 0 - disabled Language English, Polski, Deutsch English Time hh:mm hour:minute 00:00:00 Date dd/mm/yyyy Day/month/year 1.01.2015 Set defaults No, Yes 7.11. Information mode...

  • Page 41: Serial Interfaces

    ND31LITE User manual SERIAL INTERFACES 8.1. RS485 INTERFACE – list of parameters The implemented protocol is compliant with the PI-MBUS-300 Rev G specifi- cation of Modicon. List of ND31 meter serial interface parameters: • identifer 0xF0 • meter adress 1..247, •...
  • Page 42 ND31LITE User manual Example 2. Readout of two 32-bit float registers as a combination of two 16- bit registers, starting with the register address 1B58h (7000) - register values 10, 100. Request: Device address Function Register address Number of registers...
  • Page 43 ND31LITE User manual Response: Device Function Number of Value from the register Value from the register Suma kontrol- address 1D4C (7500) 1D4D (7501) na CRC bytes E4 6F Single register writing (code 06h) Example 5. Writing the value 543 (0x021F) to the register 4000 (0x0FA0)
  • Page 44 20 20 20 MAP OF ND31LITE METER REGISTERS In the ND31LITE 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 register are numbe- red from the youngest to the oldest (b0-b15).
  • Page 45 ND31LITE User manual 6000 – 6970 Float Value is set in the two following 16-bit registers. Registers contain (2x16 bits) exactly the same data, as 32-bit registers of 7500 – 7953 range. Readout registers. Bytes sequence (1-0-3-2) 7000 - 7118 Float Content of the registers set in the registers 4200 –...
  • Page 46 ND31LITE User manual 4006 0..5 Current on terminals 4, 6: 0 - first phase IL1 current 1 - reversed direction of the current of phase L1: -I 2 - second phase IL2 current 3 - reversed direction of the current of phase L2: -I...
  • Page 47 ND31LITE User manual 4023 0..1 EnP active energy counting method 0 – Ferraris 1 – Per phase 4024 0…4 Energy counters erasing 0 – no changes, 1 – erase active energies 2 – erase reactive energies, 3 – erase apparent energies, 4 – erase all...
  • Page 48 ND31LITE User manual 4041 Alarm output 1 - condition 1 signalization 4042 reserved 4043 0,1..54 Alarm output 1 - value for the condition 2 (c2) (code as in Table 8) 4044 0..9 Alarm output 1 - type for the condition 2: 0 – n_on, 1 –...
  • Page 49 ND31LITE User manual 4061 0...4 Alarm output 2 - Logic tasks of the conditions 1, 2, 3 0 – C1 1 – C1 v C2 v C3 2 – C1  C2  C3 3 – (C1  C2) v C3 4 –...
  • Page 50 ND31LITE User manual 4080 0..3600 s Alarm output 2 - condition 2 re-activation lock 4081 Alarm output 2– condition 2 signalization 4082 reserved 4083 0,1..54 Alarm output 2 - value for the condition 3 (c3) (code as in Table 8) 4084 0..9...
  • Page 51 ND31LITE User manual 4100 1..247 Modbus Network Address 4101 0..3 Transmission mode: 0->8n2, 1->8e1, 2->8o1, 3->8n1 4102 0..5 Baud rate: 0->4800, 1->9600 2->19200, 3->38400, 4->57600, 5->115200 4103 reserved 4104 Upgrade change of transmission parameters 4105 reserved 4106 reserved 4107 reserved...
  • Page 52 ND31LITE User manual 4121 reserved 4122 reserved 4123 reserved 4124 reserved 4125 reserved 4126 reserved 4127 reserved 4128 reserved 4129 reserved 4130 reserved 4131 reserved 4132 reserved 4133 reserved 4134 reserved 4135 reserved 4136 reserved 4137 reserved 4138 reserved 4139...
  • Page 53 ND31LITE User manual 4141 reserved 4142 reserved 4143 reserved 4144 reserved 4145 reserved 4146 reserved 4147 reserved 4148 reserved 4149 reserved 4150 0..2 Menu language: 0-ENG, 1-PL, 2-DE 4151 reserved 4152 Saving default parameters (complete with resetting energy as well as...
  • Page 54 ND31LITE User manual Table 14 Register Opera- Range Description Default address tions 4200 7500 .. 7957 Register 1 of programmable group of registers for readout 7500 4201 7500 .. 7957 Register 2 of programmable group of registers for readout 7501 4202 7500 ..
  • Page 55 ND31LITE User manual 4221 7500 .. 7957 Register 22 of programmable group of registers for readout 7521 4222 7500 .. 7957 Register 23 of programmable group of registers for readout 7522 4223 7500 .. 7957 Register 24 of programmable group of registers for readout...
  • Page 56 ND31LITE User manual 4244 7500 .. 7957 Register 45 of programmable group of registers for readout 7544 4245 7500 .. 7957 Register 46 of programmable group of registers for readout 7545 4246 7500 .. 7957 Register 47 of programmable group of registers for readout...
  • Page 57 ND31LITE User manual 4303 0x0001...0x1FFF Enabling screen display Bit0 – screen 1, 0x1FFF Bit1 – screen 2, ...Bit12 – screen 13 4304 reserved 4305 00..52 Screen 1 display 1, U1 4306 00..52 Screen 1 display 2, U2 4307 00..52 Screen 1 display 3, U3 4308 00..52...
  • Page 58 ND31LITE User manual 4326 00..52 Screen 3 display 6, PF2 4327 00..52 Screen 3 display 7, PF3 4328 00..52 Screen 3 display 8, PF avg 4329 00..52 Screen 4 display 1, P1 4330 00..52 Screen 4 display 2, P2 4331 00..52...
  • Page 59 ND31LITE User manual 4349 00..52 Screen 6 display 5, S1 4350 00..52 Screen 6 display 6, PF1 4351 00..52 Screen 6 display 7, tg1 4352 00..52 Screen 6 display 8, f 4353 00..52 Screen 7 display 1, U2 4354 00..52...
  • Page 60 ND31LITE User manual 4372 00..52 Screen 9 display 4, I(N) 4373 00..52 Screen 9 display 5, P DMD 4374 00..52 Screen 9 display 6, S DMD 4375 00..52 Screen 9 display 7, I DMD 4376 00..52 Screen 9 display 8, f 4377 00..52...
  • Page 61 ND31LITE User manual 4403 0..65535 Program version x100 4404 reserved 4405 0..65535 Ordering codes 4406 0..65535 Nominal voltage x10 577/2300 4407 0..65535 Nominal voltage x10 1100/4000 4408 0..65535 Nominal current (1 A) x 100 4409 0..65535 Nominal current (5 A)
  • Page 62 ND31LITE User manual 4422 0...65535 Third and second byte (B3.B2) of MAC address of the meter, format B5:B4:B3:B2:B1:B0 4423 0...65535 The fifth and fourth byte (B1.B0) of MAC address of the meter, format B5:B4:B3:B2:B1:B0 4424 reserved 4425 reserved 4426 0..152...
  • Page 63 ND31LITE User manual 4443 0..1000 Total filling of the archive’s internal memory for groups 1 and 2 in 4444 0..1000 Percentage progress when copying internal archive to file archive for group 1 in 4445 0..1000 Percentage progress when copying internal...
  • Page 64 ND31LITE User manual 4472 0..152 Active exported 3-phase energy for the current month, two older bytes 4473 0..65535 Active exported 3-phase energy for the current month, two younger bytes 4474 0..152 Active imported 3-phase energy for the current week, two older bytes 4475 0..65535...
  • Page 65 ND31LITE User manual Energiy is made available in hundreds of watt-hours (Var-hours) in double 16-bit registers, so when converting the values of individual energies from the registers, it is necessary to divide them by 100 i.e: Active energy consumed = (reg. value 4426 x 65536 + reg. value 4427) / 100 [kWh] Active energy given up = (value of rej.4428 x 65536 + value of rej.
  • Page 66 ND31LITE User manual Status 3 Register – (address 4417, R): Files archive status Bit 15 – Ethernet connected Bit 7 – Archiving group 1 enabled Bit 14 – reserved Bit 6 – reserved Bit 13 – reserved Bit 5 – copying of internal memory to files archive from archiving group 2 Bit 12 –...
  • Page 67 0 – relay number one, 1 – relay number two, 4601 0 .. 1 Relay function: 0 – standard relay supported by the ND31LITE alarm functions, 1 – function of the Protection relay, 4603 0 .. 6 The quantities to which the alarm is to operate:...
  • Page 68 ND31LITE User manual 4605 0 .. 2 Latch: 0 - when an alarm occurs, it will not latch, 1 - when an alarm occurs, it will latch, that is, after the alarm condition disappears, it is still active, 2 - resetting the alarm occurrence and returning the relay...
  • Page 69 ND31LITE User manual 7226/7026 7413 Content of the register set in the registers 4213 7228/7028 7414 Content of the register set in the registers 4214 7230/7030 7415 Content of the register set in the registers 4215 7232/7032 7416 Content of the register set in the registers 4216...
  • Page 70 ND31LITE User manual 7272/7072 7436 Content of the register set in the registers 4236 7274/7074 7437 Content of the register set in the registers 4237 7276/7076 7438 Content of the register set in the registers 4238 7278/7078 7439 Content of the register set in the registers 4239...
  • Page 71 ND31LITE User manual Tablica 19 16-bit register Register Opera- Description Unit address address tions 2x16 1032/ 32-bit 2x16 3210 6000/8000 7500 L1 phase voltage   6002/8002 7501 L1 phase current    6004/8004 7502 L1 phase active power ...
  • Page 72 ND31LITE User manual 6070/8070 7535 THD I mean 3-phase   6072/8072 7536 Frequency    6074/8074 7537 Phase-to-phase voltage L1-2   6076/8076 7538 Phase-to-phase voltage L2-3   6078/8078 7539 Phase-to-phase voltage L3-1   6080/8080 7540 Mean phase-to-phase voltage ...
  • Page 73 ND31LITE User manual 6134/8134 7567 Temperature Pt100 2    C 6136/8136 7568 Voltage L1 min   6138/8138 7569 Voltage L1 max   6140/8140 7570 Voltage L2 min  6142/8142 7571 Voltage L2 max  6144/8144 7572 Voltage L3 min ...
  • Page 74 ND31LITE User manual 6212/8212 7606 Reactive to active power ratio L1 min  6214/8214 7607 Reactive to active power ratio L2 max  6216/8216 7608 Reactive to active power ratio L3 min  6218/8218 7609 Reactive to active power ratio L3 max ...
  • Page 75 ND31LITE User manual 6288/8288 7644 Temperature T2 min    C 6290/8290 7645 Temperature T2 max    C 6292/8292 7646 THD U1 min   6294/8294 7647 THD U1 max   6296/8296 7648 THD U2 min ...
  • Page 76 ND31LITE User manual 6720/8720 7860 Harl1U1[50] 50th harmonic of L1 phase current   6722/8722 7861 Harl1[51] 51st harmonic of L1 phase current   6724/8724 7862 Harl2[2] 2nd harmonic of L2 phase current  6726/8726 7863 Harl2[3] 3rd harmonic of L2 phase current ...
  • Page 77 ND31LITE User manual 6954/8954 7977 Active imported 3-phase energy for the current month    (counter up to 9999.99 kWh) 6956/8956 7978 Active exported 3-phase energy for the current month 100 MWh    (overflows number of register 7573, reset after 9999.9...
  • Page 78 ND31LITE User manual 9020/9220 HarU1[62] 62nd harmonic of L1 phase voltage   9022/9222 HarU1[63] 63rd harmonic of L1 phase voltage   9024/9224 HarU2[52] 52nd harmonica of L2 phase voltage  9026/9226 HarU2[53] 53rd harmonic of L2 phase voltage ...

  • Page 79: Firmware Update

    10.1. Firmware update A feature implemented in the ND31LITE meters enables to upgrade firmware using a PC with eCon software installed. Free eCon software and the update files are available at www.lumel.com.pl. Upgrade of meter software (firmware) can be done via RS-485 interface.

  • Page 80: Error Codes

    After launching eCon software, set in the settings required serial port, baud rate, mode and address of the meter. Next, select the ND31LITE meter and click Config. Click the down arrow icon to read all of the settings then the disk icon to save the settings to a file (required to restore the settings later).

  • Page 81: Technical Data

    ND31LITE User manual -> Set all defaults” or via RS485). • PAR.SCREEN – displayed when the parameters related to the configura- tion of displayed parameters in the meter are incorrect. The factory set- tings should be restored (from the menu „ Displaying -> Settings -> Set screen defaults „or via RS485).
  • Page 82 ND31LITE User manual Reactive energy EnQ 0,000 .. 99 999 999, 999 kVarh • 2 (EN 61557-12) / capacity or inductive / Apparent energy EnS 0,000 .. 99 999 999, 999 kVAh • 0.5 (EN 61557- Active power factor PF -1,00 ..

  • Page 83: Ethernet Interface

    ND31LITE User manual Power consumption: - in supply circuit  6 VA  0,5 VA - in voltage circuit  0,1 VA - in current circuit Readout field 3.5’’ TFT full-color screen, resolution: 320 x 240 pixel Relay outputs (A1, A2) 2 programmable relays, volt-free NO contacts, load capacity (resistive) 0.5 A/250 V AC or 5 A/30 V DC...

  • Page 84: Additional Errors

    ND31LITE User manual Protection grade ensured by the housing from the front IP 65 from terminals side IP 20 Weight 0,3 kg Overall dimensions 96 x 96 x 77 mm Reference and rated operating conditions - supply voltage 85..253 V a.c. (40..50..400 Hz), 90..300 V d.c.

  • Page 85: Ordering Code

     for measurement input: 500 V  for circuits RS-485, Ethernet, analog outputs: 50 V • altitude a.s.l. < 2000 m, ORDERING CODE ND31LITE network parameters meter ordering code. ND31LITE XXXX Input voltage (phase/phase-to-phase)Un: 3 x 57.7/100 V, 3 x 230/400 V...
  • Page 86 ND31LITE User manual ORDER EXAMPLE, code ND31LITE 1111M0 means: ND31LITE - ND31LITE meter, 1 - input voltage 3 x 57.7/100 V, 3 x 230/400 V, 1 - 2 x relay, 1 – RS485, 1 - supply voltage 85..253 V a.c., 90..300 V d.c.

  • Page 87: Technical Support

    ND31LITE User manual LUMEL S.A. ul. Słubicka 4, 65-127 Zielona Góra, Poland tel.: +48 68 45 75 100, fax +48 68 45 75 508 www.lumel.com.pl Technical support: tel.: (+48 68) 45 75 143, 45 75 141, 45 75 144, 45 75 140 e-mail: export@lumel.com.pl...

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