Multitek MultiLed M812-LD Series User manual

MULTILED
M812-LD*
OPERATING MANUAL
multitek
M812MAN.PM5 05/11/103, 12:211

2
CONTENTS
1. INTRODUCTION
2. OPERATION
3. SCREEN DISPLAYS
4. PROGRAMMING PARAMETERS
5. RS485 COMMUNICATION
6. INSTALLATION
7. CONNECTION DIAGRAMS
8. SPECIFICATION
Revision 4
Date 21-10-2011
Multitek Ltd.
Lancaster Way, Earls Colne Business Park, Earls Colne,
Colchester, Essex. U.K.
Tel [phone] Fax [phone]
Email : [e-mail]
www.multitek-ltd.com

Version 4 update:
Page 53: Changed 3X Modbus registers to odd numbers.
Page 57: Changed 4X Modbus registers to odd numbers.

3
1.1 General
The MultiLed M812-LD* is a compact 96 x 96 mm Din case 3
phase power meter, with the ability to measure Volts, Amps,
Frequency, Active Power, Reactive Power, Apparent Power, Active
Energy, Reactive Energy, Power Factor, Average Demand Amps,
Active Power Apparent Power, Maximum Demand Amps, Active
Power and Apparent Power
Power Systems :- Single Phase, Single Phase 3 wire, 3 Phase 3
wire unbalanced load & 3 Phase 4 wire unbalanced load.
1.2 Memory
All data including energy registers, current and voltage ratios and the
calibration data is stored in a non volatile e2prom memory. The
e2prom requires no battery or other circuitry to maintain the stored
data.
The MultiLed is designed to be user friendly and simple to use. All
operations are controlled by the two push buttons & on the
front of the M812-LD*
All necessary programming is also carried out via the front two
control buttons.
Each phase current and voltage is measured continuously and all
other parameters are derived from these measurements in the
software. Voltage and current measurements are true RMS.
M812MAN.PM5 05/11/103, 12:213

1.3 Relay Output
The option of a relay is provide on M812 models. The relay
output provides a pulse output corresponding to either Watt hour
or VAr hour consumption. (see programming section 4.3.1).
The MultiLed automatically calculates the pulse rate and whether
the units are W.h, kW.h or MW.h (VAr.h, kVAr.h or MVAr.h) from
the nominal voltage and current inputs.
The relay is a normally open contact. Every time the MultiLed
registers a Watt hour or VAr hour reading the relay closes.
Pulse widths can be programmed into the MultiLed, between 20
msec and 200 msec in steps of 20 msec. (see section 4.3.3).
1.4 Communications
The MultiLed has the option of providing RS485 or output of all
measured parameters.
The RS485 enables reading and programming of the MultiLed via
a host computer. The RS485 uses the Modbus protocol allowing
multi-drop with up to 32 MultiLed's connected in parallel. The
RS485 modbus protocol allows the MultiLed to be used with PC,
PLC, RTU, Data loggers and Scada programs.
The RS232 allows the MultiLed to be connected to a standard
serial communication port, for example on a host computer, data
logger, PLC etc.
4
M812MAN.PM5 05/11/103, 12:214

5
2.0 MultiLed Models
M812-LD* measures and displays phase and line volts, phase
amps, frequency, active power, apparent power, reactive power,
active energy, reactive energy, power factor, average demand for
amps active power and apparent power, maximum demand for
amps, active power and apparent power and option of neutral
current.
Product codes Power System
M812-LD1 Single phase
M812-LD1-3 1 phase 3 wire unbalanced load
M812-LD4 3 phase 3 wire unbalanced load
M812-LD9 3 phase 4 wire unbalanced load
M812MAN.PM5 05/11/103, 12:215

3. DISPLAY SCREENS
3.1 . The sequence of the parameters displayed are dependant on
the model and the wiring system that MultiLed is programmed for.
3.1.1 The following screens appear on M812-LD9 3 phase 4 wire
unbalanced load :-
ACTION :
Switch on power
COMMENTS :
The MultiLed is programmed to 3 phase
4 wire unbalanced load. The first
screen shows 3 phase line to neutral
voltage.
ACTION :
Press
6
COMMENTS :
The second screen shows 3 phase line to
line voltage
L1/L2, L2/L3, L3/L1. If the button is
pressed the MultiLed goes back to the
previous screen.
M812MAN.PM5 05/11/103, 12:216

ACTION :
Press
COMMENTS :
The third screen shows 3 phase current
L1, L2, L3. If the button is pressed
the MultiLed goes back to the previous
screen.
ACTION :
Press
COMMENTS :
The fourth screen shows total Watt, VAr
and VA of the 3 phase system. Note for
Watt & VAr if either parameter is Export
the corresponding export annunciator
LED is illuminated.
7
ACTION :
Press
COMMENTS :
The fifth screen is an option and shows
the neutral current. The MultiLed
calculates and displays the current
flowing in the neutral lead.
M812MAN.PM5 05/11/103, 12:217

ACTION :
Press
COMMENTS : If the option of neutral
current is not ordered the fifth screen
shows system Power Factor and Hz.
Note minus sign and export annunciator
indicate which quadrant the power and
PF are in. See section 3.3.3.
8
ACTION :
Press
COMMENTS :
The seventh screen displays Reactive
Energy (VAr.h kVAr.h MVar.h depending
on CT and VT ratios)
ACTION :
Press
COMMENTS :
The sixth screen displays Active Energy
(W.h or kW.h or MW.h depending on CT
and VT ratios) Note max 6 digits are
used, in this example reading is 354999
kW.h
M812MAN.PM5 05/11/103, 12:218

9
ACTION :
Press
COMMENTS :
The eighth screen shows the Average
Demand for Watts, Amps and VA, of the
system being measured.
ACTION :
Press
COMMENTS :
The ninth screen shows the Maximum
Demand (Peak Demand) for Watts,
Amps and VA, of the system being
measured.
ACTION :
Press
COMMENTS : The tenth screen shows
harmonic distortion of each phase
voltage.
9.0
8.0
10.0
M812MAN.PM5 05/11/103, 12:219

9.0
8.0
10.0
3.1.2 3 phase 3 wire unbalanced load screen sequence.
For 3 ph 3 w systems the screen sequence is identical to the 3 phase 4
wire unbalanced load, apart from the first screen where the voltage
shown is the line to line voltage. The second screen is Amps
3.1.3 Single phase screen sequence.
Screen 1 V. Screen 2 A. Screen 3 W, VAr, VA. Screen 4 P.F. Hz
Screen 5 W.h Screen 6 VAr.h Screen 7 Average Demand W, A, VA
Screen 8 Maximum Demand W, A, VA, THD V, THD A.
10
ACTION :
Press
COMMENTS : The eleventh screen
shows harmonic distortion of each
phase current.
7.0
8.0
7.0
ACTION :
Press
COMMENTS :
Pressing returns MultiLed to the
previous screen.
M812MAN.PM5 05/11/103, 12:2110

11
----
----
---- COMMENTS :
This indicates that measuring signals are
not present but MultiLed is still
functioning correctly. Check input signal
condition and connections etc.
3.4 If the auxiliary power is switched off the MultiLed stores the
last screen, and when auxiliary power re-applied the last screen
viewed will appear.
3.3 If the input measuring voltage and current signals are lost but
the auxiliary supply is still present the MultiLed indicates this by
displaying the following.
M812MAN.PM5 05/11/103, 12:2111

12
3.3 Export Watt and Var measurements
The MultiLed displays Export Watt and VAr readings by the
corresponding Export annunciator led illuminating. If export
annunciators are not illuminated Watt and VAr readings are
importing.
3.4 Leading and Lagging Power Factor
( Capacitive and Inductive loads).
3.4.1 Leading Power Factor.
A negative sign in front of the power factor reading
indicates a Leading Power Factor. i.e. The current is leading, the
load is capacitive. Example - .5000 P.F. indicates a Leading
Power Factor of 0.5 (capacitive load).
3.4.2 Lagging Power Factor.
No sign in front of the power factor reading indicates a Lagging
Power Factor. i.e. The current is lagging, the load is inductive.
Example 0.5000 P.F. Lagging Power Factor of 0.5 (inductive
load).
3.4.3 Quadrant indication.
If the Export LED annunciator is illuminated this indicates power
factor is in a negative quadrant. If Export LED annunciator is not
illuminated this indicates the power factor is in a positive
quadrant.
M812MAN.PM5 05/11/103, 12:2112

13
3.4.5 Examples of Import and Export Power.
3.4.5.1 Power factor at 0.5 lead (60deg).
Line 1 = Importing kW
Line 2 = Exporting kVAr
Line 3 = VA measurement.
3.4.4 Quadrant / Power Diagram
IMPORT WATTS
EXPORT WATTS
P.F. = E-
P.F. = -
P.F.
P.F. = E
270°
IMPORT
VArs
90°
360°
0°
EXPORT
VArs
180°
Note the E in the above diagram signifies that the Export LED
annunciator is illuminated
M812MAN.PM5 05/11/103, 12:2113

3.4.5.3 Power Factor at 0.5 lag (240 deg)
negative quadrant.
Line 1 = Exporting kW
Line 2 = Importing KVAr
Line 3 = VA measurement
3.4.5.4 Power Factor at 0.5 lag (300
deg) positive quadrant.
Line 1 = Importing kW
Line 2 = Importing KVAr
Line 3 = VA measurement
3.4.5.2 Power factor at 0.5 lead (120
deg) negative quadrant.
Line 1 = Exporting kW
Line 2 = Exporting kVAr
Line 3 = VA measurement
14
M812MAN.PM5 05/11/103, 12:2114

3.4.6 Examples of Import and Export Lag and Lead Power
Factors.
3.4.6.1 Power Factor at 0.5 lead (60 deg)
Line 1 = Leading Power Factor
(capacitive load) in positive quadrant
Line 3 = Frequency measurment.
500
3.4.5.2 Power factor at 0.5 lead (120 deg) negative quadrant.
Line 1 = Leading Power Factor
(capacitive load) in negative quadrant
Line 3 = Frequency measurment.
500
500
15
M812MAN.PM5 05/11/103, 12:2115

3.4.5.3 Power Factor at 0.5 lag (240 deg) negative quadrant.
500
Line 1 = Lagging Power Factor
(inductive load) in negative quadrant
Line 3 = Frequency measurment.
3.4.5.4 Power Factor at 0.5 lag (300 deg) positive quadrant.
500
Line 1 = Lagging Power Factor
(inductive load) in positive quadrant
Line 3 = Frequency measurment.
16
M812MAN.PM5 05/11/103, 12:2216

4. PROGRAMMING
17
4.1.2 Entering pre-programmed security code.
NOTE 1
If this is the first time unit has been programmed and or no
security code is set please proceed to page 21. Section 4.2.1.
NOTE 2
When in programming mode if the control buttons are not used for
more than 3 minutes the MultiLed returns to the measuring mode
and displays the first screen.
NOTE 3
If you do not wish to alter LED set up mode then Press again
and the MultiLed display moves to the next programming mode :-
SYS for setting input volts and amps see section 4.2.1
All units are fully programmed by the factory but there are many
features that can be programmed by the User to suit individual
applications and needs.
Programmed values and parameters are stored in non volatile
memory and are therefore retained in power down situations.
4.1 To enter the programming mode the two front buttons
& have to be pressed simultaneously and held for 5
seconds. The MultiLed now enters either the Security Code or the
LED display brightness level control screen. If the security code
has been programmed the MultiLed asks for the security code.
M812MAN.PM5 05/11/103, 12:2217

ACTION :
Press & simultaneously, and
hold for 5 seconds.
COMMENTS :
MultiLed is now is now asking for the 4
digit security code.
code
o000
ACTION :
Press
COMMENTS :
Press cursor moves to the 2nd digit.
code
2000
18
ACTION :
Press
COMMENTS :
Press until 1st digit of the security
code figure is shown. If for example
code is 2413 then press until 2 is
shown.
code
2000
M812MAN.PM5 05/11/103, 12:2218

19
ACTION :
Press
COMMENTS :
Press until 2nd digit of the security
code figure is shown, in this example
when 4 is shown.
code
2400
ACTION :
Press
COMMENTS :
Press cursor moves to the 3rd digit.
code
2400
ACTION :
Press
COMMENTS :
Press until 3rd digit of the security
code figure is shown, in this example
when 1 is shown.
code
2410
M812MAN.PM5 05/11/103, 12:2219