Lumel ND20 Bedienungsanleitung
1
METER OF NETWORK PARAMETERS
ND20
USER’S MANUAL
2
3
Contents
1. APPLICATION ................................................................... 5
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. TECHNICAL DATA .............................................................. 62
11. VERSION CODES ............................................................... 66
12. MAINTENANCE AND GUARANTEE ........................................... 68
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5
1. 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. The meter enables the control and optimization of power elec-
tronics devices, systems and industrial installation operations.
The meter ensures the measurement of: rms values of voltage and
current, active, reactive and apparent power, active, reactive ener-
gy, power factors, frequency, 15, 30, 60 minutes’ mean active power,
archive of power profile, THD and harmonic measurements. Additio-
nally, the current value in the neutral wire is calculated. Voltages and
currents are multiplied by given voltage and current ratios of measuring
transformers. Indications of power and energy take into consideration
values of programmed ratios. The value of each measured quantity
can be transmitted to the master system through the RS-485 interface.
The relay output signals the overflow of the chosen quantity, and the
pulse output can be used for the consumption check of 3-phase active
and reactive energy.
The meter has additionally a continuous current output.
The meter has a galvanic separation between respective blocks:
- supply,
- measuring inputs,
- voltage and current inputs,
- analog output,
- RS-485 output,
- impulse output.
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2. METER SET
3. BASIC REQUIREMENTS AND
OPERATIONAL SAFETY
The set of the ND20 meter is composed of:
1. ND20 meter ........................................... 1 pc.
2. user’s manual ....................................... 1 pc.
3. guarantee card ...................................... 1 pc
4. seal........................................................ 1 pc.
5. holders to fix the meter in the panel... 4 pcs
In the safety service scope, the ND20 meter meets to requirements of
the EN 61010 -1 standard.
Observations Concerning the Operational Safety:
· All operations concerning transport, installation, and commissioning
as well as maintenance, must be carried out by qualified, skilled per
sonnel, and national regulations for the prevention of accidents must
be observed.
· Before switching the meter on, one must check the correctness
of connection to the network.
· Before removing the meter housing, one must switch the supply off
and disconnect measuring circuits
· 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. This switch should be located near
the device, easy accessible by the operator, and suitably marked.
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Fig. 1. Meter fitting
Fig. 2 Meter overall dimensions
4. 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 mm2.
One must prepare a 92.5+0.6 x 92.5+0.6 mm cut-out in the panel. The material
thickness which the panel is made from should not exceed 15 mm.
Insert the meter from the frontal panel side with the disconnected sup-
ply voltage. After the insertion into the hole, fix the meter by means of
holders.
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5. 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. Current inputs are defined in the order as 1 A or 5 A.
5.2 Voltage Inputs
Quantities on voltage inputs are automatically converted acc. to the
introduced ratio of the external voltage transformer. Voltage inputs are
defined in the order as 3 x 57.7/100 V, 3 x 230/400 V.
5.3 Connection Diagrams
a)
Direct, semi-direct
and indirect
single-phase
measurement
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Direct measure-
ment in a 3-wire
network
b)
Supply OUpulse OUA1
Semi-indirect
measurement
in a 3-wire
network
10
c)
Direct measurement
in a 4-wire network.
Supply OUA1
OUpulse Indirect measurement
with the use of 2 current
transformers and 2 or 3
voltage transformers
in a 3- wire network
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