Lumel N30P User manual

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DIGITAL
PANEL METER
N30P TYPE
USER’S MANUAL

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Contents
1. APPLICATION and METER DESIGN..........................................5
2. METER SET..................................................................................6
3. BASIC REQUIREMENTS, OPERATIONAL SAFETY ................7
4. INSTALLATION............................................................................8
5. SERVICE ....................................................................................11
6. RS-485 INTERFACE .................................................................26
7. ERROR CODES .........................................................................44
8. TECHNICAL DATA ....................................................................46
9. ORDER CODES .........................................................................49
10. MAINTENANCE AND GUARANTEE.........................................51

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1. APPLICATION AND METER DESIGN
The N30P meter is a programmable digital panel meter destined for the
measurement of a.c. voltage, a.c. current, active, reactive and apparent
power, cos ϕ, tg ϕ, ϕ, frequency, active, reactive and apparent energy,
15 minutes’ active power, 10 minutes’ voltage, 10 seconds’ frequency.
Additionally, the meter enables the indication of the current time. The
readout field is composed of a display which allows to expose results in
red, green and orange colours.
Features of the N30P meter:
zdisplay colour individually in three ranges,
zthresholds of displayed overflows,
z2 NOC relay alarms operating in 6 modes,
z2 switched relay alarms operating in 6 modes (option),
zsignaling of measuring range overflow,
zautomatic setting of the decimal point,
zprogramming of voltage and current ratios,
zprogramming of alarm and analog outputs with the reaction on any
measured value, independently of the currently displayed value,
zstorage of maximal and minimal values of all input quantities,
zreset of all watt-hour meters: active and reactive energy,
zprogrammed kind of 15 minutes’ active power measurement: mean
walking or synchronization with the RTC clock,
zmanual synchronization of 15 minutes” power, 10 minutes’ voltage,
zmonitoring of set parameter values,
zinterlocking of parameter introduction by means of a password,
zservice of the interface with MODBUS protocol in the
RTU mode (option),
zconversion of the measured value into a standard – programmable
current or voltage signal (option),

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2. METER SET
The set is composed of:
- N30P meter ......................................... 1 pc
- User’s manual ..................................... 1 pc
- Guarantee card................................... 1 pc
- Clamps to fix in the panel ................... 4 pcs
- Seal ..................................................... 1 pc
When unpacking the meter, please check whether the type and execu-
tion code on the data plate correspond to the order.
zhighlighting of any measuring unit acc. to the order,
zgalvanic separation between terminals: alarm, supply, input,
analog, pulse output, RS-485 interface.
The switching of the alarm output on, is signaled by the highlighting of
the output number.
The casing protection grade from the frontal side is IP 65.
Meter overall dimensions: 96 48 93 mm (with terminals).
The meter casing is made of plastics.
Fig. 1 View of the N30P digital meter

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3. BASIC REQUIREMENTS, OPERATIONAL
SAFETY
In the safety service scope, the meter meets the 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
personnel, and national regulations for the prevention of accidents
must be observed.
· The programming of N30P meter parameters must be carried out
after disconnecting measuring circuits
· Before switching the meter on, one must check the correctness of
connections to the network.
· Do not connect the meter to the network through
an autotransformer.
· 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
period may cause its cancellation.
· The meter fulfills requirements related to electromagnetic
compatibility in the industrial environment
· When connecting the supply, one must remember that a switch or
a circuit-breaker should be installed in the building. This switch
should be located near the device, easy accessible by the
operator, and suitably marked as an element switching
the meter off.
· Non-authorized removal of the housing, inappropriate use, incorrect
installation or operation, creates the risk of injury to personnel or
meter damage. For more detailed information, please study the
User’s Manual.

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Fig. 2. Meter fixing
4. INSTALLATION
The meter has separable strips with screw terminals which enable the
connection of external wires of 2.5 mm2cross-section. In execution for
current measurement, the plug enables a permanent fixing to the so-
cket by means of screws.
The meter is adapted to be mounted in a panel by means of clamps,
acc. to the fig. 2. One must prepare a hole of 92+0.6 45+0.6 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. Before the insertion into the panel, one must check the
correct placement of the seal. After the insertion into the hole, fix the
meter by means of clamps (fig.2).

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4.1. Connection Diagrams
Fig. 3. Overall dimensions
Fig. 4. Electrical connections of the N30P meter
for direct measurements

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Fig. 5. Electrical connections of the N30P meter
for indirect measurements