Lumel N14 3-Phase Power Network Meter

Name: Lumel N14 3-Phase Power Network Meter | Seven Star LLC
Brand: Lumel
SKU: N14-2200-7

The Lumel N14 is a programmable three-phase panel meter with a bright 3 x 3 digit red LED display. It measures current, voltage, power, power factor and four-quadrant energy in 3- and 4-wire balanced or unbalanced networks and sends the data over RS-485 Modbus. The page SKU follows the data sheet ordering example N14-2 2 00 7: 5 A current input, 3 x 230/400 V voltage input, standard version, with an extra quality inspection certificate.

Why choose the N14 for plant switchboards

The N14 shows all three phases at once on a large LED field that is easy to read from a distance in a dim switch room or on a generator panel. Its energy registers keep counting import, export, inductive and capacitive energy (P+, P-, QL, QC), so it can serve a tie feeder or a captive generator, where power flows both ways. The configuration, including the battery-supported energy counters, survives a supply loss. A detection and signalling function reports an incorrect phase sequence, a useful commissioning check on motor feeders and generator sets.

Key features

Measurement in 3- or 4-wire balanced and unbalanced systems.
Four-quadrant power and energy measurement.
15-minute mean power.
RS-485 MODBUS RTU for the master system.
Configurable alarm output and current and voltage ratios.
Parameters set by pushbuttons or through RS-485 with the free eCon program.
OC pulse output retransmitting 3-phase active energy at 5000 imp./kWh.
Battery back-up of configuration data and watt-hour meter states.

Technical specification

Measured quantities

Quantity	Range and intrinsic error
Current 1/5 A, L1 to L3	Indication 0.00 to 9.99 kA; measuring 0.02 to 6 A; error 0.5%
Voltage L-N	Indication 0.0 to 289 kV; measuring 2.9 to 480 V; error 0.5%
Voltage L-L	Indication 0.0 to 500 kV; measuring 10 to 830 V; error 1%
Frequency	45.0 to 70.0 Hz indication; 45.0 to 100.0 Hz measuring; error 0.2%
Active power	Up to 2.64 kW at the input (-999 to 999 MW indication); error 1%
Reactive power	Up to 2.64 kvar at the input; error 1%
Apparent power	1.4 VA to 1.64 kVA at the input; error 1%
Power factor PF / tangent phi	-1 to 1 / -1.2 to 1.2; error 2%
Angle between U and I	-180 to 180 degrees; error 0.5%
Active energy input / output; reactive inductive / capacitive	0 to 99 999 999.9 kWh or kvarh; error 1%
Transformer ratios	Ku (voltage) 1 to 4000; Ki (current) 1 to 10000

Outputs, interface and construction

Parameter	Specification
Relay output	NOC contacts, 250 V a.c. / 0.5 A a.c.
Pulse energy output	OC type, passive, class A to EN 62053-31; supply 18 to 27 V, 10 to 27 mA; 5000 imp./kWh independent of Ku and Ki
Interface	RS-485, MODBUS RTU, 8N2, 8E1, 8O1, 8N1, 4.8 / 9.6 / 19.2 kbit/s
Display	3 x 3 LED digits, red, 14 mm high
Dimensions and cut-out	96 x 96 x 78.5 mm; cut-out 91 +0.5 x 91 +0.5 mm
Weight	0.3 kg
Protection	IP40 from the front, IP10 from the terminal side
Supply	85 to 253 V a.c. (40 to 400 Hz) or d.c.; 6 VA
Input burden	0.05 VA in the voltage circuit and 0.05 VA in the current circuit
Input signal range	0 to 0.005 to 1.2 In and 0.05 to 1.2 Un; frequency 45 to 65 Hz; sinusoidal (THD 8% or less)
Ambient / storage temperature	-25 to 55 degrees C / -30 to 70 degrees C
Humidity	25 to 95%, no condensation
Overload for 5 s	Voltage 2 Un (max 1000 V); current 10 In
Preheating time	5 minutes
Safety	EN 61010-1, installation category III, pollution level 2, 600 V phase-to-earth, altitude below 2000 m
EMC	Immunity EN 61000-6-2; emission EN 61000-6-4

Reading the N14 order code

The code is N14 – X X XX X X. The first digit is the current input (1 for 1 A, 2 for 5 A), the second the voltage (1 for 3 x 57.7/100 V, 2 for 3 x 230/400 V, 3 for 3 x 400/690 V, a version for direct measurement only). The next two digits give the version: 00 standard, 01 for 3 x 110/190 V, 06 for -30 to 50 degrees C operation, XX custom. The last digit is the acceptance test: 8 without extra quality requirements, 7 with an extra quality inspection certificate, X to customer request. So N14-2200-7 is 5 A, 3 x 230/400 V, standard, with the inspection certificate.

Installation and operation notes from the manual

The manual specifies a 91 x 91 mm panel cut-out with a panel not thicker than 6 mm, two screw holders and wires up to 2.5 mm2 on the rear terminals. Install it with the supply off and fit a switch or circuit breaker near the meter. It is recommended to earth terminal 11. A voltage above 0.05 Un on at least one phase is needed for a correct measurement. Factory serial settings are address 1, 9600 bit/s, RTU 8N2. The data sheet lists the P43 transducer and the PD10 converter under related products.

Applications in Oman and the GCC

Typical places are low-voltage main switchboards, diesel generator panels, pump motor control centres, and chiller plants where one three-phase meter and a Modbus link feed a building management system. The ambient range of -25 to 55 degrees C needs checking for panels in direct sun.

Selection and installation notes

A panel meter is selected from the current and voltage inputs, the wiring system and the communication needed. Check the current transformer ratio, connect the voltage inputs through suitable fuses, respect the phase order, set the transformer ratios and the Modbus parameters in the meter and compare the first readings with a reference. Fit the meter in a panel with the cut-out size on the data sheet.

Information needed for a quotation

Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Frequently asked questions

What does N14-2200-7 mean?

5 A current input, 3 x 230/400 V voltage input, standard version, with an extra quality inspection certificate.

Is the N14 four-quadrant?

Yes, it measures P+, P-, QL and QC energy.

What display does the N14 have?

A red LED display with 3 x 3 digits, 14 mm high.

What is the pulse constant of the N14?

5000 imp./kWh on a passive OC output, independent of the transformer ratios.

What is the front protection grade?

IP40 from the front and IP10 from the terminal side.

Documents and quotation

Looking for a quotation on the N14-2200-7? We are an independent supplier, not the manufacturer, so stock and delivery time are confirmed enquiry by enquiry. The Lumel N14 user manual is attached. Data sheet N14-19E gives the order code structure and the ratings quoted on this page. Please check the figures on this page against the maker documents before you order. More items in Electrical & Power.

Lumel product families

The products on this site include panel and rail-mounted power network meters and analyzers with Modbus and Ethernet interfaces, power factor controllers, a DC circuit meter, a universal process panel meter, a PID temperature controller, a three-phase thyristor power controller and an Ethernet temperature and humidity monitor.

Where Lumel instruments are used

Typical uses are switchboards, generator and capacitor-bank panels, battery and rectifier circuits, industrial heating, plastics and food processing lines, and monitored storage and server rooms, wherever readings must reach a PLC, SCADA or building system.

Seven Star LLC is an independent supplier in Muscat and lists Lumel products on request, each page carrying the manufacturer's document and no price.

Frequently Asked Questions