LTWTN-321F2/Q [MSYSTEM]
Power Transducer Series LT-UNIT;
| 型号： | LTWTN-321F2/Q |
| 厂家： | 
M-SYSTEM |
| 描述： | Power Transducer Series LT-UNIT |
| 文件： | 总5页 (文件大小：130K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MODEL: LTWTN
= 6.666 × 10–3 [kWh/pulse]
= 6.666 [Wh/pulse]
Power Transducer Series LT-UNIT
Check that the required pulse unit is within the available
frequency range, 0.006 – 3.12 Hz.
Input Range [W] ÷ (Calculated Pulse × 3600[s])
= 750 ÷ (6.666 × 3600)
WATT TRANSDUCER
(self-powered)
Functions & Features
• Provides a DC output signal and a pulse totalizer signal in
proportion to AC active power
= 0.03125 [Hz]
• Convenient pulse unit output (Wh×10
n)
[1] CONFIGURATION
1: 3-phase / 3-wire
• Measuring bidirectional power flow
• DC output containing little ripple is ideal for computer
input
2: Single-phase / 2-wire
3: Single-phase / 3-wire
4: 3-phase / 4-wire
• “Time division multiplication” method accepts distorted
waveforms
• Isolation up to 2000 V AC
• High-density mounting
[2] VT INPUT (unbalanced load)
For 3-phase / 4-wire, phase voltages (e.g. 110 V / √3 ) are used.
1: 110 V AC
• Conforms to IEC 60688
• No auxiliary power supply required
(Not selectable for single-phase/3-wire system.)
2: 220 V AC
Typical Applications
• Centralized monitoring and control of power management
system in a manufacturing facility or building
• SCR – Silicon Controlled Rectifier
(Not selectable for single-phase/3-wire system.)
4: 220 V / 380 V AC (3-phase/4-wire only)
A: 100 V / 200 V AC
(single-phase / 3-wire only)
72
(2.83)
[3] CT INPUT (unbalanced load)
Current
1: 1 A AC
2: 2 A AC
5: 5 A AC
111
(4.37)
[4] DC OUTPUT
143 (5.63)
Current
mm (inch)
A: 4 – 20 mA DC (Load resistance 500 Ω max.)
D: 0 – 20 mA DC(Load resistance 500 Ω max.)
F: 0 – 10 mA DC (Load resistance 1000 Ω max.)
G: 0 – 1 mA DC (Load resistance 10 kΩ max.)
J: 0 – 5 mA DC (Load resistance 2000 Ω max.)
FW: -10 – +10 mA DC (Load resistance 1000 Ω max.)
GW: -1 – +1 mA DC (Load resistance 10 kΩ max.)
JW: -5 – +5 mA DC (Load resistance 2000 Ω max.)
Z: Specify current (See OUTPUT SPECIFICATIONS)
Voltage
MODEL: LTWTN–[1][2][3][4][5][6]
ORDERING INFORMATION
• Code number: LTWTN–[1][2][3][4][5][6]
Specify a code from below for each of [1] through [6].
(e.g. LTWTN-115A2/T/Q)
• Special output range (For codes Z & 0)
• Specify the specification for option code /Q
(e.g. /C01)
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.)
• Use Ordering Information Sheet (No. ESU-3355).
How to determine Pulse Unit
[Example]
3-phase / 3-wire, VT 3300/110 V, CT 250/5 A, calibration
range 750 W
10 [kWh/pulse] ÷ ((3300÷110) × (250÷5))
LTWTN SPECIFICATIONS
ES-3356 Rev.13 Page 1/5
https://www.m-system.co.jp/
MODEL: LTWTN
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)
ordering.
[Example]
3-phase / 3-wire, measuring wattage 750 kW,
VT 3300/110 V, CT 250/5 A
750 × 10 [W] ÷ ((3300÷110) × (250÷5)) = 500 [W]
3
• Single-phase / 2-wire
[5] PULSE OUTPUT (open collector)
0: None
INPUT
VT / CT
STD.RANGE
CODE
BURDEN (VA)
USABLE RANGE
VT
CT
ꢀ.1
ꢀ.ꢂ
ꢀ.±
ꢀ.1
ꢀ.ꢂ
ꢀ.±
1: 2.777 Hz at 100 % input
1 / 1
1 / ꢂ
1 / ±
ꢂ / 1
ꢂ / ꢂ
ꢂ / ±
±1ꢀꢀ0
±ꢂꢀꢀ0
±±ꢀꢀ0
±ꢂꢀꢀ0
±2ꢀꢀ0
±1ꢀꢀꢀ0
±±ꢀ ꢁ ±1ꢂꢀ0
±1ꢀꢀ ꢁ ±ꢂ2ꢀ0
±ꢂ±ꢀ ꢁ ±ꢃꢀꢀ0
±1ꢀꢀ ꢁ ±ꢂ2ꢀ0
±ꢂꢀꢀ ꢁ ±24ꢀ0
±±ꢀꢀ ꢁ ±1ꢂꢀꢀ0
2: Specify pulse unit (within 0.006 – 3.12 Hz)
ꢂ.±
[6] OPTIONS (multiple selections)
Terminal Cover
ꢂ.±
blank: Without
/T: With
• Single-phase / 3-wire
Other Options
INPUT
VT / CT
STD.RANGE
CODE
BURDEN (VA)
blank: none
USABLE RANGE
VT
CT
/Q: Option other than the above (specify the specification)
A / 1
A / ꢂ
A / ±
±ꢂꢀꢀ0
±2ꢀꢀ0
±1ꢀꢀ ꢁ ±ꢂ2ꢀ0
±ꢂꢀꢀ ꢁ ±24ꢀ0
±±ꢀꢀ ꢁ ±1ꢂꢀꢀ0
ꢀ.1/ph
ꢀ.ꢂ/ph
ꢀ.±/ph
P1: ꢂ.±
Pꢂ: ꢀ.ꢂ
SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
±1ꢀꢀꢀ0
• 3-phase / 3-wire
INPUT
VT / CT
STD.RANGE
CODE
BURDEN (VA)
/C02: Polyurethane coating
USABLE RANGE
/C03: Rubber coating
VT
CT
1 / 1
1 / ꢂ
1 / ±
ꢂ / 1
ꢂ / ꢂ
ꢂ / ±
±ꢂꢀꢀ0
±2ꢀꢀ0
±1ꢀꢀꢀ0
±2ꢀꢀ0
±4ꢀꢀ0
±ꢂꢀꢀꢀ0
±1ꢀꢀ ꢁ ±ꢂ2ꢀ0
±ꢂꢀꢀ ꢁ ±24ꢀ0
±±ꢀꢀ ꢁ ±1ꢂꢀꢀ0
±ꢂꢀꢀ ꢁ ±24ꢀ0
±2ꢀꢀ ꢁ ±ꢄꢃꢀ0
±1ꢀꢀꢀ ꢁ ±ꢂ2ꢀꢀ0
ꢀ.1/ph
ꢀ.ꢂ/ph
ꢀ.±/ph
ꢀ.1/ph
ꢀ.ꢂ/ph
ꢀ.±/ph
P1: ꢂ.±
P3: ꢀ.ꢂ
GENERAL SPECIFICATIONS
Connection: M4 screw terminals (torque 1.2 N·m)
P1: ꢂ.±
P3: ꢀ.2
Screw terminal: Chrome-plated steel
Housing material: Flame-resistant resin (black)
Isolation: Voltage input to current input to DC output to
pulse output
• 3-phase / 4-wire
Computation: Time division multiplication
Overrange output: Approx. -10 to +120 % at 1 – 5 V
Zero adjustment(DC output): -5 to + 5 % (front)
Span adjustment(DC output): 95 to + 105 % (front)
INPUT
VT / CT
STD.RANGE
CODE
BURDEN (VA)
VT CT
USABLE RANGE
1 / 1
1 / ꢂ
1 / ±
ꢂ / 1
ꢂ / ꢂ
ꢂ / ±
2 / 1
2 / ꢂ
2 / ±
±ꢂꢀꢀ0
±2ꢀꢀ0
±1ꢀꢀꢀ0
±2ꢀꢀ0
±4ꢀꢀ0
±ꢂꢀꢀꢀ0
±4ꢀꢀ0
±1ꢃꢀꢀ0
±2ꢀꢀꢀ0
±1ꢀꢀ ꢁ ±ꢂ2ꢀ0
±ꢂꢀꢀ ꢁ ±24ꢀ0
±±ꢀꢀ ꢁ ±1ꢂꢀꢀ0
±ꢂꢀꢀ ꢁ ±24ꢀ0
±2ꢀꢀ ꢁ ±ꢄꢃꢀ0
±1ꢀꢀꢀ ꢁ ±ꢂ2ꢀꢀ0
±2ꢀꢀ ꢁ ±44ꢀ0
±4ꢀꢀ ꢁ ±1ꢅꢃꢀ0
±ꢂꢀꢀꢀ ꢁ ±22ꢀꢀ0
P1 ꢁ Pꢂ ꢀ.1/ph
: ꢂ.±
ꢀ.ꢂ/ph
P3: ꢀ.1 ꢀ.±/ph
P1 ꢁ Pꢂ ꢀ.1/ph
: ꢂ.±
INPUT SPECIFICATIONS
Frequency: 50 or 60 Hz
ꢀ.ꢂ/ph
P3: ꢀ.3 ꢀ.±/ph
P1: ꢂ.± ꢀ.1/ph
Pꢂ: ꢀ.2 ꢀ.ꢂ/ph
P3: ꢀ.2 ꢀ.±/ph
■ VOLTAGE INPUT
Operational range: 85 – 110 % of rating
Overload capacity: 150 % of rating for 10 sec., 110 %
continuous
■ CURRENT INPUT
Operational range: 0 – 120 % of rating
Overload capacity: 4000 % of rating for 1 sec., 2000 % for 4
sec., 120 % continuous
OUTPUT SPECIFICATIONS
■DC Output
• DC Current: -10 – +20 mA DC
Span: Min. 1 mA, max. 20 mA
Offset: Max. 1.5 times span
Load resistance: Output drive 10 V max.
• DC Voltage: -10 – +12 V DC
Minimum span: 5 mV
■ How to determine Wattage Range
Calibration Range [W] = Measuring Wattage ÷ ((VT Ratio) ×
(CT Ratio))
Check that the required calibration range is within the
available range in the table. Specify this range when
LTWTN SPECIFICATIONS
ES-3356 Rev.13 Page 2/5
https://www.m-system.co.jp/
MODEL: LTWTN
Offset: Max. 1.5 times span
STANDARDS & APPROVALS
EU conformity:
Load resistance: Output drive 1 mA max. at ≥ 0.5 V
■ Pulse output: Open collector
EMC Directive
0 Hz at 0 W (cutout at approx. 0.5 – 1.0 %)
Rating: 35 V DC @ 100 mA
EMI EN 61000-6-4
EMS EN 61000-6-2
ON voltage: ≤ 1 V at 100 mA
Low Voltage Directive
EN 61010-1
ON duration: Max. 0.5 sec., min. 50 msec. (approx.)
Frequency range: 0 – 2.777 Hz (0 – 100 %) standard; 0 –
0.006 Hz through 3.12 Hz is possible.
Measurement Category II (input)
Pollution Degree 2
• 2.777 Hz at 100 % Input
Input to output: Reinforced insulation (300 V)
RoHS Directive
[Example] 1000 W calibration range
2.777 [Hz] × 3600 [s] ÷ 1 [kW] = 10000 [pulses/kWh]
• Specified Pulse Unit: Refers to how much electrical energy
(kWh) consumption at the primary of the VT and CT
corresponds to the single output pulse per hour from the
transducer.
■ OPERATION DIAGRAM (example)
OUT
20 mA
OUT
10 V
12
4
5
0
500
1000 W
0
500
1000 W
OUT
20 mA
OUT
+10 V
12
4
0
-10 V
-1000 W
-1000 W
0
+1000 W
0
+1000 W
INSTALLATION
Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 85 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 450 g (0.99 lb)
PERFORMANCE in percentage of span
Accuracy: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,
45 – 65 Hz)
Magnetic field (ext. origin) effect: ± 0.5 % (400 A/m)
Response time: ≤ 2 sec. (0 – 100 % ±1 %)
Ripple: 0.5 %p-p max.
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute
(voltage input to current input to DC output to pulse output
to ground)
Impulse withstand voltage: 1.2 / 50 μsec., ±5 kV
(input to output or ground)
LTWTN SPECIFICATIONS
ES-3356 Rev.13 Page 3/5
https://www.m-system.co.jp/
MODEL: LTWTN
CONNECTION DIAGRAM
■ 3-PHASE/3-WIRE
■ SINGLE-PHASE/2-WIRE
SOURCE
SOURCE
1
2
3
1
2
VT
VT
FUSE
FUSE
U
V
u
v
P1
P2
U
u
P1
P2
P3
7
8
9
13
14
11
12
7
8
13
14
11
12
+
+
PULSE OUTPUT
PULSE OUTPUT
V
V
v
v
–
+
–
–
+
–
U
u
DC OUTPUT
DC OUTPUT
K
K
K
k
1S
1L
3S
3L
k
l
1S
1L
1
2
5
6
1
2
k
CT
CT
l
L
l
L
L
LOAD
LOAD
■ SINGLE-PHASE/3-WIRE
■ 3-PHASE/4-WIRE
SOURCE
SOURCE
1
N
2
N
1
2
3
VT
VT
FUSE
FUSE
U
u
P1
P0
P2
U
V
u
v
P1
P2
P3
P0
7
8
9
13
14
11
12
7
8
13
14
11
12
+
+
PULSE OUTPUT
PULSE OUTPUT
V
V
v
v
–
–
U
V
u
v
+
–
9
+
–
U
V
u
v
U
u
DC OUTPUT
DC OUTPUT
K
K
10
K
K
K
k
1S
1L
2S
2L
1
2
5
6
k
k
1S
1L
2S
2L
3S
3L
1
2
3
4
5
6
CT
l
k
k
l
CT
l
L
L
l
l
L
L
L
LOAD
Pulse Output Connection Example
LOAD
■ Open Collector
+
–
13
14
LTWTN SPECIFICATIONS
ES-3356 Rev.13 Page 4/5
https://www.m-system.co.jp/
MODEL: LTWTN
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
10 (.39)
16–M4 SCREW
2–M4 MTG HOLE
TERMINAL COVER (option /T)
DIN RAIL
35mm wide
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16
8 (.31)
[4 (.16)]
54 (2.13)
72 (2.83)
3
(.12)
143 (5.63)
• When mounting, no extra space is needed between units.
Specifications are subject to change without notice.
LTWTN SPECIFICATIONS
ES-3356 Rev.13 Page 5/5
https://www.m-system.co.jp/
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