M98175101-20-10A
SINGLE-PHASE ENERGY
METER
MK-30-LCD
&
MK-60-LCD
MK-LCD
1.- MAIN FEATURES
Electronics-based, Class 1 rated, electrical
energy meter, with LCD display, for its use in
L.V. single-phase networks, These energy
meters are appropriate for any application
that requires the monitoring of partial energy
consumptions.
Additional relay output for pulse output
usage.
Besides the energy value, the voltage,
current and power measurements of the
mains will be also displayed in the screen.
According to the type, a RS-485
communication system is implemented (for
data retrieval from a PC). In this case, the
relay output can be set to work as a pulse or
alarm output.
2.- MK-LCD types.
Type Currents
(Ib)
Code
30A 771 211 MK-LCD
60A 771 215
3.- Installation
This manual contains information
and warnings that must be
followed for operating the
ENERGY METER safely and maintaining the
instrument in a safe operating condition.
Whether the instrument is not used as
manufacturer’s specifications, the protection
of the instrument can be damaged.
Mounting :
The instrument is to be mounted onto a DIN
rail. All wiring connections keep inside the
switchboard cabinet.
Note that with the instrument powered on,
the terminals, cover opening actions or
elements removal may allow accessing
dangerous parts. The instrument must not
be used until this is completely installed.
The monitored line should be provided with a
circuit breaker or any equivalent element
(fuses) to disconnect the instrument from the
power supply network. This switching device
must be placed near the instrument and will
be easily accessible.
The instrument is directly power
supplied from the cables crossing the
MK-LCD. The power supply and
voltage-current measuring circuit must
be wired with cables of appropriate
cross-section according to the current
flowing through the MK-LCD.
Single-phase load
Pulse co unting
or
Alarm detection
MK-LCD
Terminal
No.
Terminal description
1
2
3
4
5
6
No used
No used
Relay RL1 output
Relay common
Voltage/Current L1 input
Voltage N/L2 input
Note: If, once the installation has been
completed, the power and energy
readout blinks, it means that the meter
is detecting the energy as a generated
energy.
4.- Operation mode
The MK-LCD has a total value counter
and a partial value counter (a “P” letter
goes before this latest counter in
display).
A push-button enables the user to
perform the following actions:
• Display of maximum values: Pressing
the button for less than 3 seconds.
• Reset the partial energy counter to
zero: Pressing the button for more
than 3 seconds.
5.- MAINTENANCE
Before any adjustment, replacement,
maintenance or repairing operation is
carried out, the instrument must be
disconnected from any power supply
source.
When any protection failure is
suspected to exist, the instrument must
be immediately put our of service. The
instrument’s design allow a quick
replacement in case of any failure. In
this case contact a qualified service
representative.
6.- Specifications
Power supply/measuring circuit:
-Single-phase : 110 V -
-Tolerance : -15 % / +20 %
-Frequency : 50 - 60 Hz
-Burden : 3 VA
-Working temperature: 0 to 50 º C
-Rated current (Ib): According to type
-Permanent overload: 2 Ib
-Start current: 0,1% Ib
Accuracy class : Class 1
Mechanical features :
- Case type: Modular
self-extinguishing plastic
- Current cable entrance:
Maximum Ø 11 mm
- Voltage connection:
Metallic terminal with
“pozidriv” No.2 / flat mixed screw.
- Pulse output:
Metallic terminal with flat headed screw.
- Mounting:
Symmetric DIN 46277 (EN50022) rail
- Protection :
Frontal cover: IP 51
Terminals: IP 20
- Dimensions : 70 x 80 x 75 mm
(4-module relay – DIN 43 880)
- Weight : 0.200 kg.
Display:
-Type: LCD (6 digits) without reset
-Energy unit : kW·h
-Maximum count: 999999 kW·h
Output relay characteristics :
-Type: opto-isolated transistor
(open collector)
- Maximum switching voltage :
24 V c.c.
- Maximum switching current :
50 mA
- Maximum frequency: 1 pulse/s
- Energy output : 100 pulses/kW·h
- Pulse duration : 500 ms
- Safety ..... Class III – 300 V a.c.
(EN-61010)
Protection against electric shock:
by class II double-isolation
Standards :
EN-61036, EN-61010
7.- TECHNICAL SERVICE
For any inquiry about the instrument
performance or whether any failure happens,
contact to technical service:
Vial Sant Jordi, s/n
08232 Viladecavalls
(Barcelona) Spain
Tel. (+34) 93 745 29 00
Fax (+34) 93 745 29 14
e-mail:
sat@circutor.es
web: www.circutor.com
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