概述
数据手册MEWT-322-D 概述
Plug-in Signal Conditioners M-UNIT
MEWT-322-D 数据手册
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PDF下载MODEL: MEWT
4: 220 V / 5 A AC
Plug-in Signal Conditioners M-UNIT
A: 100 V / 200 V / 1 A AC (single-phase / 3- wire)
B: 100 V / 200 V / 5 A AC (single-phase / 3- wire)
WATT TRANSDUCER
Functions & Features
[3] OUTPUT
Current
• Providing a DC output signal in proportion to AC active
power
A: 4 – 20 mA DC (Load resistance 600 Ω max.)
B: 2 – 10 mA DC (Load resistance 1200 Ω max.)
C: 1 – 5 mA DC (Load resistance 2400 Ω max.)
D: 0 – 20 mA DC (Load resistance 600 Ω max.)
E: 0 – 16 mA DC (Load resistance 750 Ω max.)
F: 0 – 10 mA DC (Load resistance 1200 Ω max.)
G: 0 – 1 mA DC (Load resistance 12 kΩ max.)
GW: -1 – +1 mA DC (Load resistance 10 kΩ max.)
Z: Specify current (See OUTPUT SPECIFICATIONS)
Voltage
• Measuring bidirectional power flow
• DC output containing little ripple is ideal for computer
input
• "Time division multiplication" method accepts distorted
waveforms
• Isolation up to 2000 V AC
• High-density mounting
Typical Applications
• Centralized monitoring and control of power management
system in a manufacturing facility or building
• SCR – Silicon Controlled Rectifier
1: 0 – 10 mV DC (Load resistance 10 kΩ min.)
2: 0 – 100 mV DC (Load resistance 100 kΩ min.)
3: 0 – 1 V DC (Load resistance 1000 Ω min.)
4: 0 – 10 V DC (Load resistance 10 kΩ min.)
5: 0 – 5 V DC (Load resistance 5000 Ω min.)
6: 1 – 5 V DC (Load resistance 5000 Ω min.)
1W: -10 – +10 mV DC (Load resistance 10 kΩ min.)
2W: -100 – +100 mV DC (Load resistance 100 kΩ min.)
3W: -1 – +1 V DC (Load resistance 1000 Ω min.)
4W: -10 – +10 V DC (Load resistance 10 kΩ min.)
5W: -5 – +5 V DC (Load resistance 5000 Ω min.)
0: Specify voltage (See OUTPUT SPECIFICATIONS)
50
(1.97)
80
(3.15)
136
(5.35)
mm (inch)
[4] POWER INPUT
AC Power
MODEL: MEWT–[1][2][3]–[4][5]
B: 100 V AC
C: 110 V AC
D: 115 V AC
F: 120 V AC
G: 200 V AC
H: 220 V AC
J: 240 V AC
ORDERING INFORMATION
• Code number: MEWT-[1][2][3]-[4][5]
Specify a code from below for each of [1] through [5].
(e.g. MEWT-11A-B/Q)
• Calibration range (e.g. 0 – 1000 W)
• VT ratio, CT ratio (e.g. VT 3300/110 V, CT 250/5 A)
• Special output range (For codes Z & 0)
• Specify the specification for option code /Q
(e.g. /C01/S01)
DC Power
S: 12 V DC
R: 24 V DC
V: 48 V DC
P: 110 V DC
[1] CONFIGURATION
1: 3-phase / 3-wire
2: Single-phase / 2-wire
3: Single-phase / 3-wire
[5] OPTIONS
blank: none
/Q: With options (specify the specification)
[2] INPUT (unbalanced load)
1: 110 V / 5 A AC
2: 110 V / 1 A AC
3: 220 V / 1 A AC
MEWT SPECIFICATIONS
ES-1921 Rev.7 Page 1/5
http://www.m-system.co.jp/
MODEL: MEWT
• 3-phase / 3-wire
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
VOLTAGE INPUT CURRENT INPUT
BURDEN BURDEN
0.1VA 2
STD
RANGE
AVAILABLE
RANGE
1A
5A
1A
5A
200W
1000W
400W
100W – 240W
500W – 1200W
200W – 480W
×
/C02: Polyurethane coating
110V 0.2VA 2
×
0.5VA 2
×
/C03: Rubber coating
0.1VA 2
×
220V 0.4VA 2
×
TERMINAL SCREW MATERIAL
/S01: Stainless steel
0.5VA 2
×
2000W 1000W – 2400W
• Single-phase / 2-wire
VOLTAGE INPUT CURRENT INPUT
STD
RANGE
AVAILABLE
RANGE
GENERAL SPECIFICATIONS
Construction: Plug-in
BURDEN
BURDEN
0.1VA
1A
5A
1A
5A
100W
500W
50W – 120W
250W – 600W
100W – 240W
500W – 1200W
110V 0.2VA
Connection: M3.5 screw terminals
0.5VA
Screw terminal: Chromated steel (standard) or stainless
steel
0.1VA
200W
220V 0.4VA
0.5VA
1000W
Housing material: Flame-resistant resin (black)
Isolation: Voltage input to current input to output to power
Computation: Time division multiplication
Overrange output: Approx. -10 to +120 % at 1 – 5 V
Zero adjustment: -5 to +5 % (front)
Span adjustment: 95 to 105 % (front)
• Single-phase / 3-wire
VOLTAGE INPUT CURRENT INPUT
BURDEN BURDEN
0.1VA 2
STD
RANGE
AVAILABLE
RANGE
1A
5A
200W
100W – 240W
500W – 1200W
×
100/
0.2VA 2
×
200V *1
0.5VA 2
×
1000W
100/200V: 100V = phase voltage
200V = line voltage except the grounding.
INPUT SPECIFICATIONS
Frequency: 50 or 60 Hz
• Current Input
OUTPUT SPECIFICATIONS
■ DC Current: 0 – 20 mA DC and ± 1 mA
Minimum span: 1 mA
Operational range: 0 – 120 % of rating
Overload capacity: 1000 % of rating for 3 sec., 200 % for 10
sec., 120 % continuous
Offset: Max. 1.5 times span
Load resistance: Output drive 12 V maximum; 10 V for [±]
output
• Voltage Input
Operational range: 0 – 120 % of rating
Overload capacity: 150 % of rating for 10 sec., 120 %
continuous
■ DC Voltage: -10 – +12 V DC
Minimum span: 5 mV
■ How To Determine Wattage Range
Calibration Range [W] = Measuring Wattage ÷ ((VT Ratio) ×
(CT Ratio))
Offset: Max. 1.5 times span
Load resistance: Output drive 1 mA max. at ≥ 0.5 V
■ OPERATION DIAGRAM (example)
Check that the required calibration range is within the
available range in the table. Specify this range when
ordering.
OUT
OUT
10 V
20 mA
12
4
5
[example]
3-phase / 3-wire, measuring wattage 750 kW,
VT 3300/110 V, CT 250/5 A
0
500
1000 W
0
500
1000 W
750 × 10 [W] ÷ ((3300÷110) × (250÷5))= 0 – 500 [W]
3
OUT
20 mA
OUT
+10 V
12
4
0
-10 V
-1000 W
-1000 W
0
+1000 W
0
+1000 W
MEWT SPECIFICATIONS
ES-1921 Rev.7 Page 2/5
http://www.m-system.co.jp/
MODEL: MEWT
INSTALLATION
Power input
• AC: Operational voltage range: rating ±10 %,
50/60 ±2 Hz, approx. 2 VA
• DC: Operational voltage range: rating ±10 %,
or 85 – 150 V for 110 V rating, ripple 10 %p-p max.,
approx. 2 W (18 mA at 110 V)
Operating temperature: -5 to +60°C (23 to 140°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 400 g (0.88 lb)
PERFORMANCE in percentage of span
Accuracy: ±0.5 %
Temp. coefficient: ±0.05 %/°C (±0.03 %/°F)
Response time: ≤ 1 sec. (0 – 90 %)
Ripple: 0.5 %p-p max. (50/60 Hz)
The output ripple may increase when there is great
difference between the frequencies of input signal and
power supply.
Line voltage effect: ±0.1 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute
(voltage input to current input to output to power to ground)
MEWT SPECIFICATIONS
ES-1921 Rev.7 Page 3/5
http://www.m-system.co.jp/
MODEL: MEWT
CONNECTION DIAGRAM
■3-PHASE/3-WIRE
■SINGLE-PHASE/2-WIRE
SOURCE
3
SOURCE
1
1
2
2
VT
VT
FUSE
FUSE
U
V
u
v
P1
P2
U
u
P1
P2
P3
3
9
4
1
2
5
6
1
2
+
–
+
–
OUTPUT
OUTPUT
V
V
v
v
U
u
K
K
K
L
k
1S
1L
3S
3L
k
l
1S
1L
5
6
7
8
7
8
k
CT
*
*
*
CT
10
11
10
11
U(+)
V(–)
U(+)
V(–)
l
l
L
L
POWER**
POWER**
LOAD
LOAD
*CT Protector (model: CTM) attached to these terminals.
*CT Protector (model: CTM) attached to these terminals.
■SINGLE-PHASE/3-WIRE
SOURCE
N 2
1
**The transducer can be powered from the input voltage
when the voltage is sufficiently stable and meets
other supply voltage requirements.
VT
FUSE
U
u
P1
P0
P2
3
9
4
1
2
+
–
OUTPUT
V
V
v
v
U
u
K
K
k
1S
1L
2S
2L
5
6
7
8
k
*
*
CT
10
11
U(+)
V(–)
l
l
L
L
POWER**
LOAD
*CT Protector (model: CTM) attached to these terminals.
EXTERNAL DIMENSIONS unit: mm (inch)
CLAMP
(top & bottom)
7.8 (.31)
DIN RAIL
35mm wide
8
9
7
6
5
4
2–
4.5 (.18) dia.
MTG HOLE
25 (.98) deep
3
2
10 11
1
11
–M3.5
SCREW
50 (1.97)
107 (4.21)
136 (5.35)
40 (1.57)
50 (1.97)
[3.3 (.13)]
• When mounting, no extra space is needed between units.
MEWT SPECIFICATIONS
ES-1921 Rev.7 Page 4/5
http://www.m-system.co.jp/
MODEL: MEWT
TERMINAL ASSIGNMENTS unit: mm (inch)
CT PROTECTOR
(model: CTM)
Positions of CTM
2
1
2
2
For Single-phase / 2-wire
For Three-phase / 3-wire
or Single-phase / 3-wire
1
8
7
6
5
4
9
3
2
10 11
1
Specifications are subject to change without notice.
MEWT SPECIFICATIONS
ES-1921 Rev.7 Page 5/5
http://www.m-system.co.jp/
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