Lumel N14 User manual
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NETWORK
PARAMETER
METER
N14 TYPE
USER’S MANUAL
Materm d.o.o.
tel: 02 608 90 10
info@materm.si
www.materm.si
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CONTENTS
1. APPLICATION..............................................................................5
2. METER SET .................................................................................5
3. BASIC REQUIREMENTS, OPERATIONAL SAFETY..................6
4. MOUNTING ..................................................................................6
5. METER DESCRIPTION................................................................7
6. N14 PROGRAMMING ................................................................12
7. RS-485 INTERFACE ..................................................................20
8. ERROR CODES .........................................................................26
9. TECHNICAL DATA.....................................................................26
10. ORDER CODES .........................................................................29
11. MAINTENANCE AND GUARANTEE.........................................30
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1. APPLICATION
The N14 meter is a programmable digital panel instrument destined for
the measurement of 3-phase, 3 or 4-wire power network parameters, in
balanced or unbalanced systems with the simultaneous display of me-
asured quantities and digital transmission of their values.
This network parameter meter enables the control and optimization of
power electronic devices, systems and industrial installations.
The N14 meter ensures the measurement of: RMS voltage and current,
active, reactive and apparent power, active and reactive energy, power
factors, frequency, mean active power (e.g. 15-min mean power).
Voltages and currents are multiplied by given current and voltage ratios
of measuring transformers. Indications of power and energy take into
consideration programmed ratio values.
The value of each measured quantity can be transmitted to the master
system through the RS-485 interface.
The relay output signals the exceeding of the chosen quantity and the
impulse output can be used for the consumption control of the 3-phase
active energy. The meter has a detection and signaling of incorrect pha-
se sequence.
The meter is fixed to the panel by means of screw holders.
2. METER SET
The meter set includes:
- N14 meter 1 pc
- user’s manual 1 pc
- guarantee card 1 pc
- holder to fix the meter in a panel 2 pcs
When unpacking, please check the completeness of the set.
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3. BASIC REQUIREMENTS AND OPERATIONAL SAFETY
In the security scope, the meter meets the requirements of EN 61010-1
standard.
Remarks concerning the operator safety:
All operations concerning the meter installation and connections
should be carried out by qualified skilled personnel and national
regulations for the prevention of accidents must be observed.
Before connecting the meter to the power, one must check the
correctness of connections.
Do not connect the meter to the network through an
autotransformer.
Before the removal of the meter housing, one must disconnect its
supply and all measuring circuits.
The housing removal from the meter during the guarantee contract
causes its cancellation.
The meter fulfils requirements concerning the electromagnetic
compatibility in the industrial environment.
In the building installation should be a switch or a circuit breaker,
situated near the meter, easy accessible for the operator and
suitably marked.
4. MOUNTING
The meter is adapted to be mounted in a panel by means of holders
acc. to fig.1.
The meter housing is made of a self-extinguishing plastics. Meter dimen-
sions: 96 96 70.5 mm. One must prepare a hole of 91+0.5 91+0.5
mm in the panel which the thickness should not exceed 6 mm.
The meter must be introduced from the panel front with disconnected
supply voltage. At the rear side of the meter there are terminal strips
which enable the connection of wires up to 2.5 mm2.
After the insertion into the hole, fix the meter by means of two holders.
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Fig. 1. Overall meter dimensions
5. METER DESCRIPTION
5.1. Current inputs
All current inputs are galvanically isolated (internal current transformers).
The meter is adapted to co-operate with external measuring current
transformers.
Displayed current values and derived quantities are automatically
re-counted by the quantity of the introduced external transformer ratio.
Current inputs are defined in the order as 1 A or 5 A.
5.2. Voltage inputs
Quantities on voltage inputs are automatically recounted by the quantitiy
of the introduced external voltage transformer ratio.
Voltage inputs are defined in the order as 3 x 57.7/100 V, 3 x 230/400 V
or 3 x 400/690 V.
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5.3. Connection diagrams
Direct measurement in a
3-wire network
Semi-indirect measure-
ment in a 3-wire network
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Fig. 2 Meter connection diagrams in a 3-wire network
Indirect measurement with
the use of 2 current trans-
formers and 2 or 3 voltage
transformers in a 3-wire
network.
Note: In an industrial environment with high electromagnetic noises it is
recommended to earth the terminal 11.
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Semi-indirect measure-
ment in a 4-wire network
Direct measurement in a
4-wire network
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