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Type M1 00
Energy Meter
Type M 100
Energy Meter
T & DProtection & Control
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Features
Active and reactive energy
metering
Single phase or three phase
connection
Balanced or unbalanced load
One or two line LCD display
(one line per counter)
Pulsed outputs available
(1 or 2, as an option)
Setting of CT primary value
Compact design
Introduction
The M100 energy meter usesnumerical technology to achievehigh accuracy over a wide dynamicmeasuring range. It measuresenergy for single or three phasesystems. Housed in a DIN standard96mm by 96mm case, the M100 iscompact, rugged and ideal forpanel mounting in powerdistribution and power monitoringapplications.
Application
M100 applications include;
Energy measurement to
IEC 61036 Class 1.0
Replacement/ upgrade of existingenergy meters
Energy metering for building
management or power
management systems using
pulsed outputs
The M100 is intended for use onsystems where energy monitoring isrequired, being capable ofproviding display of one or twometering quantities, each of whichcan be specified for active orreactive power, and for import orexport measurement. Options alsoprovide pulsed outputs for 1 or 2measurements. In this application,the M100 provides a more compactsolution than electromagneticdevices.
Type M 100 Energy Meter
Functions
One or two parameters, accordingto the model ordered, selected from:
Import active energyWhtotalimport
Export active energyWhtotalexport
Import reactive energy
VArhtotalimport
Export reactive energyVArhtotalexport
Configuration
It is possible to modify the followingparameters, using the optional
external pushbutton:Current transformer primary value
Reset of energy meters
Fig 1.: M100
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Fig 2.:Typical diagram - singlephase connection
1
3
2
k l
LK
11
u v
U V
A
N
Load
Notes: Connect two wire auxiliary supply terminals marked supply if fitted.
Out 1/ Out 2 are volt-free contact pulse outputs, if fitted.
Out 1 Out 2 Supply
1
3
2 5 8
u v
U V
k l
LK
u v
U V
Notes: Connect two wire auxiliary supply to terminals marked ' supply' i f fitted.
Out 1/ Out 2 are volt-free contact pulse outputs, if fitted.
A
C
B
Load
Out 1 Out 2 Supply
11
1
3
2
u v
U V
k l
K L
Notes: Connect two wire auxiliary supply to terminals marked ' supply' if fitted.
Out 1/ Out 2 are volt-free contact pulse outputs, i f fitted.
A
N
B
C
Load
Out 1 Out 2 Supply
Fig 3.:
Typical diagram - three phase,three wire balanced load
Fig 4.:Typical diagram - three phase,four wire balanced load
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Figure 5:Typical diagram - three phase,three wire unbalanced load
1
3
2 8
9
5
7
u v u v
U V U V
k l
K L
k l
K L
Notes: Connect two wire auxiliary supply to terminals marked ' supply' i f fitted.
Out 1/ Out 2 are volt-free contact pulse outputs, if fi tted.
A
C
B
Load
SupplyOut 1Out 2
A
N
1
3
4
96
2
7
5
11
8
B
C
K L
k l
k l
k lK L
K L
11u
x
u
x
u
x
X
U
X
U
X
U
Notes: Connect two wire auxiliary supply to terminals marked 'supply' if fitted.
Out 1/ Out 2 are volt-free contact pulse outputs, i f fitted.
Load
Out 1O ut 2 Supply
DC
100ms
Out
R>100R
0V
24V
Pulse receptorPower supply
Figure 6:Typical diagram - three phase,four wire unbalanced load
Figure 7:Connections for pulse output
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Ha rdw are Description
The M100 is housed in a DIN case
with maximum dimensions of 96mm by
96mm by 96mm.
M100 variants are available for single
phase systems or 3 phase 3 or 4 wire
systems, with balanced or unbalanced
loads.The front panel contains a 1 or 2 line
alphanumeric liquid crystal display of
16 characters per line, with a
character size of 4.86mm by 2.96mm.
Measuring circuit connections on the
rear are by means of individual M4
screw clamp terminals, auxiliary and
pulsed output connections using M2.5
terminal blocks. A copy of the relevant
DIN circuit diagram is printed on a
label on the device.
User Interface
If the external pushbutton option has
been selected, the configurable
features of the M100 can be accessed
through a menu-driven system. The
menu is arranged as shown below:
Active and reactive energy are
displayed when the device is
switched on.
Procedure for resetting
channel 1
Press the setting button once and hold.
The above display is shown.The display will show the far right digitcount down from 5 to 0 and thenreturn to the normal working display.The counter should have reset to zero.If the setting button is released beforezero count is reached the counter willnot reset.
Procedure for resettingchannel 2
Press the setting button twice and
hold.
The above display is shown.
The display will show the far rightdigit count down from 5 to 0 andthen return to the normal workingdisplay. The counter should havereset to zero. If the setting button isreleased before zero count isreached the counter will not reset.
Procedure for changing theCT ratio
1. Press the setting button threetimes and hold until the CT ratiois displayed.
2. Press the setting button once.Rolling characters, +,, b, Eshould appear in the bottomright hand corner of the display.
3. Hold the setting button in until Eis displayed, then release. SETwill appear under the CT ratioand an underscore will appearunder the first digit as shownbelow.
(a) To increase the digits byone, press and hold thesetting button until a + isdisplayed and release. Todecrease the digits hold thesetting button until a isdisplayed and release.Repeat step (a) until thecorrect reading isdisplayed.
(b) To change to the next digithold the setting button untilE is displayed andrelease. Repeatsteps 1 and 2 until thecorrect CT ratio is set.
4. W hen changing the CT primarysettings the last digit set shouldbe the far right digit as shownbelow.
5. Once this digit has been set,press the setting button andrelease when E is displayed.
6. This will enter the new settinginto the unit. If you finish on anyother digit, the unit will defaultback to the original setting.
7. If the device is left in the CTsetting mode it willautomatically change to thenormal working display after30 seconds, defaulting to thelatest fully programmed value(ie. any incomplete changeswill be lost).
* 123456789 Wh000001234 varh
1* RESET* 5
2* RESET* 5 CT=00000/ 5
SET
CT=00000/ 5SET
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Technical Data
Accuracy
Active and reactive energy
IEC 61036 Class 1.0
Voltage input
Standard rated voltages (Vn)
63.5V, 110V, 230V, 400V
Optional rated voltage
50V to 440V
Voltage measuring range with
separate auxiliary supply
0.1 to 1.5Vn
Self-powered
0.8 to 1.2Vn
Burden with auxiliary supply
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Case
The M100 is housed in a 96mm x
96mm x 91mm plastic case in
compliance with UL 94-V0. See
Figure 8.
96mm
96mm 5mm 91mm*
92mm (+0.8 , 0)
92mm (+0.8 , 0)
* includes terminals/ panel fixing
Terminal 1
M4Terminals
Figure 8: Case outline
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Numeric instrumentation
Panel mounted energy meter
Application
Panel mounted energy meter 1
Connection options
Single phase 1
3 phase 4 wire, balanced 2
3 phase 3 wire, balanced 3
3 phase 3 wire, unbalanced 4
3 phase 4 wire, unbalanced 5
Display options
Wh only 1
VArh only 2
Wh/ VArh 3
Wh/ W h 4
VArh/ VArh 5
CT secondary
1A 1
5A 5
VT secondary63.5V B
110V E
230V V
400V 4
Frequency
50 60Hz X
Auxiliary rating
63.5 B
110V E
230V V
No. of pulsed outputs
None 0
One 1
Two 2
External reset facility
Not fitted 0
Fitted 1
M 1
Informa tion Required w ith Order
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Display 1
Display 2
Active energy meter AReactive energy meter R
Import energy meter I
Export energy meter E
Lagging VArs as positive +
Lagging VArs as negative
Ex tra informa tion required w ith order
CT ratio
VT ratio
Relay 1 Relay 2
W h or varh
Import or export
Energy per pulse
Effect of CT primary rating on energy per pulse for 5A secondary
Table 1
Notes on ordering
The standard devices on offer reflect the new normalised European voltage, eg. 230V L-N will work on a 220V or
240V system. Therefore, if for example a 220V unit is requested, a nominal 230V unit will be supplied.
NB. The unit of measurement displayed changes according to the change in CT ratio. The energy per pulse is related
to the displayed value. See Table 1 below for default settings.
If pulse outputs are required:
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