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Operating Instructions
MFM376 SERIES
OP506-V02
SPECIFICATIONS
96 x 96
Installation Category
III
Frequency
Active Power
Apparent power
Power Factor
Active Energy
Reactive Energy
Apparent Energy
Measurement
Accuracy
Voltage V
L-N
Voltage V
L-L
±
0.5% of Full scale
±
Full scale
0.5% of
Current
±
0.5% of Full scale
±
0.1%
For L-N Voltage >20V,
For L-L Voltage >35V
±
0.01
Class 1
Class 1
Class 1
Reactive Power
1%
1%
1%
ACCURACY
Product
ORDER CODE INFORMATION
Supply
Certification
LISTED
DISPLAY
T
Note :
CT SECONDARY
PT PRIMARY
PT SECONDARY
DISPLAY UPDATE TIME
DISPLAY SCROLLING
POWER CONSUMPTION
ENVIRONMENTAL CONDITIONS
MOUNTING :
WEIGHT
OUTPUT
Pulse Output
Pulse Width :
3 Row of 4 Digits
7 Segment LED Display 0.49 inch Height Digit
Integrated with parameter Units
3 Ø 4 wire, 3 Ø - 3 wire, 2 Ø - 3 wire and
Ø -
Installation Category
(600V)
1A to 10,000A if CT secondary is 1 else
5A to 10,000A
1A or 5A (programmable)
100V to 500kV (Programmable for any value)
100 to 500V (Programmable for any value)
1 sec. for all parameters
Auto / Manual / Default
Less than 8VA
- Indoor use
- Altitude of up to 2000 meters
- Pollution degree
Temperature :
Humidity
: Up to 85% non-condensing
Panel mounting
MFM376-230V AC : 260gms
MFM376-C
: 230gms
Voltage range : External 24V DC max.
Current capacity : 100 mA max
100ms 5ms.
WIRING INPU
RATED INPUT VOLTAGE
FREQUENCY RANGE
RATED INPUT CURRENT
BURDEN
CT PRIMARY
-
1
2 wire
(R/Y/B Programmable)
45-65 Hz
Nominal 5A AC (Min-14mA, Max-6A)
0.5VA@5A per phase
1A / 5A to 10,000A (Programmable for any value)
11 to 300V AC (L-N) ; 19 to 519V AC (L-L)
III
II
:
±
Operating : -10 C to 55 C
Storage : -20 C to 75 C
°
°
°
°
240V AC, 20%, 50/60Hz
±
MFM376-230VAC
Note :
a) For voltage, current and power resolution is
automatically adjusted
b) For power factor resolution is 0.001
c) • Blinks indicating accumulation of energy, if load
is connected on any one phase of 3 Phase.
0.01K
0.1K
1K
0.01M
0.1M
<40
<400
<
00
40
<
000
40
<
0000
40
0.001K
0.01K
0.1K
1K
0.01M
PT
x
Ratio
CT Ratio
Pulse
INT
RESOLUTION :
For installing the meter
1. Prepare the panel cutout with proper dimensions
s
shown below.
a
2
meter
. Push the meter into the panel cutout. Secure the
in its place by fitting the clamp on the rear side. fit
clamps on both sides in diagonally opposite location for
optimum fitting.
3. For proper sealing, tighten the screws evenly with
required torque.
MECHANICAL INSTALLATION
Outline
Dimensions
(in mm)
Panel cutout
Dimensions
(in mm)
90.5
99
99
3
49
90.5
90.5
TERMINAL CONNECTIONS
MAINTENANCE
1. The equipment should be cleaned regularly to avoid
blockage of ventilating parts.
2. Clean the equipment with a clean dry or damp cloth.
Do not use any cleaning agent other than water.
SAFETY PRECAUTIONS
All safety related codifications, symbols and
instructions that appear in this operating manual or on
the equipment must be strictly followed to ensure the
safety of the operating personnel as well as the
instrument.
If the equipment is not used in a manner specified by the
manufacturer it might impair the protection provided by the
equipment.
Do not use the equipment if there is any mechanical
damage.
Ensure that the equipment is supplied with correct
voltage.
1. Read complete instructions prior to installation and
operation of the unit.
2. Risk of electric shock.
3. The equipment in its installed state must not come in
close proximity to any heating sources, oils, steam,
caustic vapors or other unwanted process by products.
1. To prevent the risk of electric shock, power supply to the
equipment must be kept OFF while doing the wiring
arrangement.
2. Wiring shall be done strictly according to the terminal
layout. Confirm that all connections are correct.
3. Use lugged terminals.
4. To reduce electromagnetic interference use of wires with
adequate ratings and twists of the same in equal size shall
be made with shortest connections.
5. Layout of connecting cables shall be away from any
internal EMI source.
6. Cable used for connection to power source, must have a
cross section of 0.5mm to 2.5mm
Thesewires shall have current carryingcapacityof 6A.
7. Copper cable should be used
8. Before attempting work on device, ensure absence of
voltages using appropriate voltage detection device.
2
2
( 20 to 14AWG ; 75 C(min)).
(Stranded or Single core cable).
0
WIRING GUIDELINES
1. This equipment, being built-in-type, normally becomes a
part of main control panel and in such case the terminals
do not remain accessible to the end user after installation
and internal wiring.
2. Conductors must not come in contact with the internal
circuitry of the equipment or else it may lead to a safety
hazard that may in turn endanger life or cause electrical
shock to the operator.
3. Circuit breaker or mains switch must be installed
between power source and supply terminals to facilitate
power 'ON' or ‘OFF’ function. However this switch or
breaker must be installed in a convenient position
normally accessible to the operator.
4.
5. The equipment shall not be installed in environmental
conditions other than those mentioned in this manual.
. The equipment does not have a built-in-type fuse.
Installation of external fuse of rating 275V AC /
Amp for
electrical circuitry
is highly recommended.
Before disconnecting the secondary of the external
current transformer from the equipment, make sure that
the current transformer is short circuited to avoid risk of
electrical shock and injury.
6
0.5
/ battery
INSTALLATION GUIDELINES
CAUTION :
WARNING :
CAUTION :
N
S2
S1
S2
S1
S2
S1
V1
N
L
O
A
D
I
1
V2
V3
L1
L2
L3
I
2
I
3
PULSE
OUTPUT
L
N
+
CONNECTION DIAGRAM
0.01K
0.1K
1K
0.01M
0.1M
1M
0.1M
4000000
1M
kWh /
kVAh /
kVArh
40V - 270V DC,
85V - 270V AC, 50/60Hz
MFM376-C
MFM376-230V
AC
MFM376-C
N
S2
S1
S2
S1
S2
S1
V1
N
L
O
A
D
I
1
V2
V3
L1
L2
L3
I
2
I
3
PULSE
OUTPUT
+
+
+
CONNECTION DIAGRAM
RS485
Doc. name : OP INST MFM376 SERIES OP506-V02(Page 1 of 4)
