F&F LE-03M CT User manual

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LE-03M CT
Electric energy meter,
3-phase
The LE-03M CT is a static (electronic) calibrated electricity meter
of three-phase alternating current in a semi-direct system.
Indicator is designed to work with current transformers for pri-
mary current Ip from 5÷6000 A and secondary current 5 A. The
maximum current measured value of the system is determined
by the primary current Ip applied CT (current transformer).
The user has the ability to set the index value used gear ratio,
which allows you to indicate the actual value taken by the elec-
tricity system.
Serial RS-485 and implemented Modbus RTU communication
protocol allows the indicator used in networks for remote re-
ading of data.
Purpose
F&F Filipowski sp. j.
Konstantynowska 79/81, 95-200 Pabianice, POLAND
phone/fax [phone]
www.fif.com.pl; e-mail: [e-mail]
Do not dispose of this device in the trash along with other waste!
According to the Law on Waste, electro coming from households free of charge and can
give any amount to up to that end point of collec� on, as well as to store the occasion of
the purchase of new equipment (in accordance with the principle of old-for-new, regard-
less of brand). Electro thrown in the trash or abandoned in nature, pose a threat to the
environment and human health.

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A special electronic system under the influence of current flow
and applied voltage in each phase generates pulses in propor-
tion to the electricity consumed in this phase.
Phase energy consumption is indicated by flashing the corre-
sponding LED (L1, L2, L3). The sum of the three phases of pulses
indicated by a flashing LED is converted to energy taken in the
entire three-phase system, and its value is determined by the
segment LCD display.
The values of primary currents Ip of the transformers that can
be used are stored in the memory of the meter. The selection of
appropriate value, which corresponds to the values of the con-
nected transformers results in automatic setting of appropriate
coefficient, according to which the actual value of consumed
electric energy of the system is calculated. This value is indica-
ted on the LCD in a format that depends on the transformer
selected.
Values of Ip currents of transformers inscribed in memory of the
indicator: 5, 20, 30, 40, 50, 60, 75, 80, 100, 120, 125, 150, 200,
250, 300, 400, 500, 600, 750, 800, 1000, 1200, 1250, 1500, 2000,
2500, 3000, 4000, 5000, 6000.
Active energy consumed AE+ [kWh]
Functioning
Measured values

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The meter is equipped with pulse output open collector (OC
type). This allows you to connect another pulse device (SO) that
reads pulses generated by the meter.
No additional connected equipment is required for proper ope-
ration of the meter.
Constant pulse counter is 12000 pulses/kWh for maximum input
current meter, or the secondary current transformer (5 A). When
using a dedicated transformer the number of pulses per 1 kWh is
calculated from the formula:
(12000×5)/Ip,
where:
Ip – primary current of the transformers used.
Example:
for 5/5A transformer (Ip=5): (12000×5)/5=12000 pulses/kWh
for 100/5A transformer (Ip=100): (12000×5)/100=600 pulses/
kWh.
Change of meter address is done via the RS-485 port using the
Modbus RTU protocol command to set the desired value in the
meter register. The default meter address: 1
Default setting of the Ip current value: 5.
Pulse output
Meter address

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The meter is marked with individual serial number allowing its
unambiguous identification. The marking is laser engraved and
cannot be removed).
The meter has sealable input and output terminal covers to pre-
vent any attempts to bypass the meter.
Meter number
Sealing
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Wiring diagram

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1-6 – voltage terminals
8 – pulse output (–)
9 – pulse output (+)
10 – RS-485 output (B)
11 – RS-485 output (A)
15-18 – current terminals
Description of terminals
Dimensions

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1.Disconnect the power supply.
2.The indicator mounted on a rail in the distribution box.
3.Connect the power in accordance with the markings to the
terminals 18 (L1), 17 (L2), 16 (L3).
4.N-wire connect to terminal 15.
5.Transformers fasten on the phase conductors and secondary
outputs connected in accordance with the indications to the
terminals: 1-2 (L1), 3-4 (L2), 5-6 (L3).
If the secondary circuit of the transformer is opened
during operation, there is a risk of high voltage on the
secondary winding. In order to protect personnel opera-
ting the device, it is recommended to ground one end of
the secondary winding of each transformer.
Do not tighten the terminals without an inserted wire.
This may damage the clamping mechanism or the plastic
cover of the terminal.
6.Connect the RS-485 network cables to the terminals 10 (B)
- 11 (A).
7.Additional pulse receiver connected to terminals 9 (+) - 8 (–).
Additional pulse receiver is not required.
8.Put the meter terminals covers.
9.If required, the casings should be sealed.
Mounting

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Communication parameters
Protocol Modbus RTU
Operation mode Slave
Port settings
Baud rate: 9600 bps
Parity: NONE
Stop bits: 1
Modbus address
(factory settings) 1÷245
Measurement registers
address description com-
mand type atr
0 Active energy (R0) 03 int R
1 Active energy (R1) 03 int R
2 Active energy (R2) 03 int R
6 Meter address 06 int W
Legend:
R – read, W – write.
Modbus RTU protocol parameters

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Register values are stored as integers.
To get a reading, the three received registers values should
be transform algebraically in accordance with the following
formula:
(R0 × 256³ + R1 × 256² + R2 × 256 + R3) / x,
where:
R0 – register number 0;
R1 – register number 1;
R2 – register number 2;
R3 – register number 3.
x – factor depending on Ip current setting
The value of "x"in the Ip current ranges:
5÷75 100
80÷750 10
80÷6000 1
To set the value of the Ip current number, one must
give a specific number for the Ip value, e.g. value 8 for a
100/5 transformer. (see table of projection numbers and
formats for Ip currents).

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Ip current
Ip current
value
number
Format
LCD projection
5 1 99999.99
20 2 99999.99
30 3 99999.99
40 4 99999.99
50 5 99999.99
60 6 99999.99
75 7 99999.9
80 8 99999.9
100 9 99999.9
120 10 99999.9
125 11 99999.9
150 12 99999.9
200 13 99999.9
250 12 99999.9
300 13 99999.9
400 14 99999.9
500 15 99999.9
Table of projection numbers and format for Ip currents

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Ip current
Ip current
value
number
Format
LCD projection
600 16 99999.9
750 17 99999.9
800 18 99999
1000 19 99999
1200 20 99999
1250 21 99999
1500 22 99999
2000 23 99999
2500 24 99999
3000 25 99999
4000 26 99999
5000 27 99999
6000 28 99999
Table of projection numbers and format... cont.

installation 4-wire
rated voltage 3×230/400 V
minimum measured current 0.04 A
base current 3×1.5 A
maximum current 3×5 A
transformer secondary current 5 A
voltage measuring range 160÷265 V
measurement accuracy IEC62052-11, IEC62053-21
rated frequency 50 Hz
insulation protection class II
housing PC+ABS material
own power consumption <10 VA; <2 W
load capacity of current inputs 0.4 VA
indication range depends on the gear*
constant depends on the gear
signalling current consumption A, B, C phases 3×red LED
read-out signalling red LED
communication
port RS-485
communication protocol Modbus RTU
transmission parameters 9600 bps
parity NONE
stop bits 1
pulse output
type open collector
maximum voltage 27 V DC
maximum current 27 mA
pulse constant depends on the gear
pulse time 35 ms
* see the LCD projection format table, page 10-11
Technical data

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working temperature -25÷55°C
terminal 25 mm² screw terminals
dimensions 7 module (122 mm)
mounting on TH-35 rail
ingress protection IP20
Program for test reading of the counted energy value and for
basic settings of the meter parameters.
Available at www.fif.com.pl (on the device’s subpage).
For communication of the meter with the computer, the USB
CN-USB-485 converter or any RS-485/USB standard is required.
F&F products are covered by a 24-month warranty from the date
of purchase. The warranty is only valid with proof of purchase.
Contact your dealer or contact us directly.
F&F Filipowski sp. j. declares that the device is in conformity
with the essential requirements of The Low Voltage Directive
(LVD) 2014/35/EU and the Electromagnetic Compatibility (EMC)
Directive 2014/30/UE.
The CE Declaration of Conformity, along with the references to
the standards in relation to which conformity is declared, can be
found www.fif.com.pl on the product subpage.
LE Config service programm
Warranty
CE declaration

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E211122
»Please read the instructions carefully before installation.
»The device should be installed and operated by qualified per-
sonnel who are familiar with its design, operation, and asso-
ciated risks.
»Do not install a meter that is damaged or incomplete.
»The user is responsible for proper grounding of the system,
proper selection, installation, and efficiency of other devices
connected to the meter, including safety devices such as over-
current, residual current and overvoltage circuit breakers.
»Before connecting the power supply, make sure that all cables
are connected correctly.
»It is essential to observe the operating conditions of the meter
(supply voltage, humidity, temperature).
»To avoid electric shock or damage to the meter, turn off the
power supply whenever the connection is changed.
»Do not make any changes to the unit yourself. Doing so can
result in damage to or improper operation of the device,
which in turn can pose a threat to people operating it. In such
cases, the manufacturer is not responsible for the resulting
events and may refuse the provided warranty in the event of
a complaint.
General work safety conditions