ES-1926 Rev.4
MUWT
Plug-in Signal Conditioners M-UNIT
WATT TRANSDUCER
(with pulse output)
Functions & Features
• Providing a DC output signal and pulse totalizer signal in proportion to AC active power
• Convenient pulse unit output (Wh×10
n
)
• 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
MODEL: MUWT–[1][2][3][4]–[5][6]
ORDERING INFORMATION
• Code number: MUWT-[1][2][3][4]-[5][6]
Specify a code from below for each of [1] through [6].
(e.g. MUWT-11A4-C/Q)
• Specify the specification for option code /Q
(e.g. /C01/S01)
• Calibration range (e.g. -750 – +750 W)
• VT ratio, CT ratio (e.g. VT 3300 V /110 V, CT 250 A / 5 A)
• Special output range (For codes Z & 0)
• Pulse output (e.g. 6.666 Wh/pulse)
How To Determine Pulse Unit ....
[example]
3-phase / 3-wire, VT 3300 V / 110 V, CT 250A / 5 A, calibration range 750 W
•
From Pulse Unit
10 [kWh/pulse]
10 [kWh/pulse] ÷ ((3300÷110) × (250÷5))
= 6.666 × 10
–3
[kWh/pulse]
= 6.666 [Wh/pulse]
•
From Pulse Rate
150 [pulse/kWh]
1 ÷ 150 = 6.666 × 10
–3
[kWh/pulse]
= 6.666 [Wh/pulse]
At primary side
150 [pulse/kWh] ÷ ((3300 ÷ 110) × (250 ÷ 5))
= 0.1 [pulse/kWh]
•
From Frequency
0.03125 Hz (at 100 %)
750 [W] ÷ (0.03125 [Hz] × 3600 [s]) = 6.666 [Wh/pulse]
[1] CONFIGURATION
1
: 3-phase / 3-wire
2
: Single-phase / 2-wire
3
: Single-phase / 3-wire
[2] INPUT (unbalanced load)
1
: 110 V / 5 A AC
2
: 110 V / 1 A AC
3
: 220 V / 1 A AC
4
: 220 V / 5 A AC
A
: 100 V / 200 V / 1 A AC (single-phase / 3- wire)
B
: 100 V / 200 V / 5 A AC (single-phase / 3- wire)
[3] OUTPUT
Current
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
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)
[4] PULSE OUTPUT
2
: Open collector
3
: Relay contact (mercury relay)
Suffix code 3 has been discontinued. Select code 4 instead.
4
: Power photo MOSFET relay
[5] POWER INPUT
AC Power
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
DC Power
S
: 12 V DC
R
: 24 V DC
V
: 48 V DC
P
: 110 V DC
[6] OPTIONS
blank
: none
/Q
: With options (specify the specification)
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
/C03
: Rubber coating
TERMINAL SCREW MATERIAL
/S01
: Stainless steel
GENERAL SPECIFICATIONS
Construction
: Plug-in
Connection
: M3.5 screw terminals
Screw terminal
: Chromated steel (standard) or stainless steel
Housing material
: Flame-resistant resin (black)
Isolation
: Voltage input to current input to DC output to pulse output to power
Overrange output
: Approx. -10 – +120 % at 1 – 5 V
Zero
adjustment(DC output)
: -5 to + 5 % (front)
Span adjustment(DC output)
: 95 to + 105 % (front)
INPUT SPECIFICATIONS
Frequency
: 50 or 60 Hz
•
Current Input
Operational range
: 0 – 120 % of rating
Overload capacity
: 1000 % of rating for 3 sec., 200 % for 10 sec., 120% continuous
•
Voltage Input
Operational range
: 0 – 120 % of rating
Overload capacity
: 150 % of rating for 10 sec., 120 % continuous
■
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 ordering.
[example]
3-phase / 3-wire, measuring wattage 750 kW,
VT 3300/110 V, CT 250/5 A
750 × 10
3
[W] ÷ ((3300÷110) × (250÷5))= 0 – 500 [W]
OUTPUT SPECIFICATIONS
■
DC Output
•
DC Current
: 0 – 20 mA DC and ±1 mA
Minimum span
: 1 mA
Offset
: ≤ 1.5 times span
Load resistance
: Output drive 12 V max.; 10 V for [±] output
■
DC Voltage
: -10 – +12 V DC
Minimum span
: 5 mV
Offset
: Max. 1.5 times span
Load resistance
: Output drive 1 mA max. at ≥ 0.5 V
■
Pulse output
: Frequency output proportional to the input; 0 – 2.777 Hz typical; 0 Hz at 0 W (cutout at approx. 0.5 – 1.0 %); max. 27.77 Hz at 100 % input
•
Power Photo MOSFET Relay
Rating
: 120 V AC/DC @ 100 mA (resistive load)
Max. ON resistance
: 10 Ω
•
Open Collector
Rating
: 35 V DC @ 100 mA
ON voltage
: ≤ 1 V at 100 mA
ON duration
: 25 msec. min., 0.5 sec. max.
(at 0 – 2.777 Hz)
• 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.
• How to Set Pulse Unit
: The switches S1 through S5, VT and CT ratios, and the transducer's calibration input range all determine the relative value of one pulse, i.e. the number of kWh per pulse.
(VT Ratio × CT Ratio × Calibration Range [kW])
÷ (2.777 [Hz] × 3600 [sec.] × 10 × Pulse Unit [kWh/pulse])
= 0.XXXX × 10
–X
= 0. [a1] [a2] [a3] [a4] × 10
–[a5]
a1 thr. a4: integer, 1 though 9
a5: integer, 0 through 6
[example] VT 3300 V / 110 V, CT 250 A / 5 A, Pulse Unit 10 [kWh/pulse], Calibration Range 1000 [W]
((3300 ÷ 110) × (250 ÷ 5) × 1 [kW])
÷ (2.777 Hz × 3600 [sec.] × 10 × 10 [kWh/pulse])
= 0.1500 × 10
–2
S1 = 1, S2 = 5, S3 = 0, S4 = 0, S5 = 2
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
: 550 g (1.21 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 DC output to power to ground)
1000 V AC @ 1 minute (pulse output to voltage input or current input or DC output or power or ground)
EXTERNAL VIEW
CONNECTION DIAGRAM
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]