MEWT-114-D/Q

MEWT MSYSTEM | Alldatasheet

Document overview

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Technical content

MODEL: MEWT MEWT SPECIFICATIONS ES-1921 Rev.7 Page 1/5 http://www.m-system.co.jp/ Plug-in Signal Conditioners M-UNIT WATT TRANSDUCER Functions & Features

• Providing a DC output signal in proportion to AC active power
• 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 (1.97) 136 (5.35) (3.15) mm (inch) MODEL: MEWT–[1][2][3]–[4][5]

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) [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] 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 [5] OPTIONS blank: none /Q: With options (specify the specification)

MODEL: MEWT MEWT SPECIFICATIONS ES-1921 Rev.7 Page 2/5 http://www.m-system.co.jp/ SPECIFICATIONS OF OPTION: Q (multiple selections) COATING (For the detail, refer to M-System's 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 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) 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
• 3-phase / 3-wire VOLTAGE INPUT CURRENT INPUT STD RANGE AVAILABLE RANGEBURDEN BURDEN 110V 0.2VA ×2 1A 0.1VA×2 ±200W ±100W – ±240W 5A 0.5VA×2 ±1000W ±500W – ±1200W 220V 0.4VA ×2 1A 0.1VA×2 ±400W ±200W – ±480W 5A 0.5VA×2 ±2000W ±1000W – ±2400W
• Single-phase / 2-wire VOLTAGE INPUT CURRENT INPUT STD RANGE AVAILABLE RANGEBURDEN BURDEN 110V 0.2VA 1A 0.1VA ±100W ±50W – ±120W 5A 0.5VA ±500W ±250W – ±600W 220V 0.4VA 1A 0.1VA ±200W ±100W – ±240W 5A 0.5VA ±1000W ±500W – ±1200W
• Single-phase / 3-wire VOLTAGE INPUT CURRENT INPUT STD RANGE AVAILABLE RANGEBURDEN BURDEN 100/ 200V *1 0.2VA×2 1A 0.1VA×2 ±200W ±100W – ±240W 5A 0.5VA×2 ±1000W ±500W – ±1200W 100/200V: 100V = phase voltage 200V = line voltage except the grounding. OUTPUT SPECIFICATIONS ■ DC Current: 0 – 20 mA DC and ± 1 mA Minimum span: 1 mA Offset: Max. 1.5 times span Load resistance: Output drive 12 V maximum; 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 500 1000 W0 OUT 20 mA 500 1000 W0 OUT 10 V 0 +1000 W-1000 W OUT 20 mA 0 +1000 W-1000 W OUT +10 V -10 V ■ OPERATION DIAGRAM (example)

MODEL: MEWT MEWT SPECIFICATIONS ES-1921 Rev.7 Page 3/5 http://www.m-system.co.jp/ 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)

MODEL: MEWT MEWT SPECIFICATIONS ES-1921 Rev.7 Page 4/5 http://www.m-system.co.jp/ CONNECTION DIAGRAM LOAD 1 2 3 SOURCE P2 V P1 U v uFUSE VT V v U u k l CT L K k l L K OUTPUT ■3-PHASE/3-WIRE ■SINGLE-PHASE/2-WIRE LOAD 1 2 SOURCE P2 V P1 U v uFUSE VT k l CT L K ■SINGLE-PHASE/3-WIRE LOAD

1 N 2

v uFUSE VT V v U u k l CT L K k l L K U(+) V(–) POWER U(+) V(–) POWER OUTPUT OUTPUT U(+) V(–) POWER** *CT Protector (model: CTM) attached to these terminals. *CT Protector (model: CTM) attached to these terminals. *CT Protector (model: CTM) attached to these terminals. ** The transducer can be powered from the input voltage when the voltage is sufficiently stable and meets other supply voltage requirements. EXTERNAL DIMENSIONS unit: mm (inch) 5678 2111 10 80 (3.15) 80 (3.15) (.79) 40 (1 .57) 50 (1 .97) 7 .8 (.31) CLAMP (top & bottom) DIN RAIL 35mm wide2–4.5 (.18) dia. MTG HOLE 25 (.98) deep 11 –M3.5 SCREW

• When mounting, no extra space is needed between units.

MODEL: MEWT MEWT SPECIFICATIONS ES-1921 Rev.7 Page 5/5 http://www.m-system.co.jp/ TERMINAL ASSIGNMENTS unit: mm (inch) 2111 10 CT PROTECTOR (model: CTM) 20 (.79) 5678 2 1 For Single-phase / 2-wire For Three-phase / 3-wire or Single-phase / 3-wire Positions of CTM 2 1 Specifications are subject to change without notice.