LWTN MSYSTEM | Alldatasheet

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MODEL: LWTN http://www.m-system.co.jp/ LWTN SPECIFICATIONS ES-1976 Rev.2 Page 1/5 Power Transducer Series L-UNIT WATT TRANSDUCER (self-powered, 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×10n)
  • 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 (2.95) 112 (4.41) (2.95) mm (inch) MODEL: LWTN–[1][2][3][4][5]

ORDERING INFORMATION

  • Code number: LWTN–[1][2][3][4][5] Specify a code from below for each [1] through [5]. (e.g. LWTN-11A2/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 3300/110 V, CT 250/5 A)
  • Special DC 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 3300/110 V, CT 250/5 A, calibration range 750 W
  • From Pulse Unit 10 [kWh/pulse] = 6.666 × 10–3 [kWh/pulse] = 6.666 [Wh/pulse]
  • From Pulse Rate 150 [pulses/kWh] 1 / 150 [pulses/kWh] = 6.666 × 10–3 [kWh/pulse] = 6.666 [Wh/pulse]
  • From Frequency 0.03125 Hz (at 100 %) = 6.666 [Wh/pulse] [1] CONFIGURATION 1: 3-phase / 3-wire 2: Single-phase / 2-wire 3: Single-phase / 3-wire 4: 3-phase / 4-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 5: 220 V / 380 V / 1 A AC (3-phase / 4-wire) 6: 220 V / 380 V / 5 A AC (3-phase / 4-wire) 7: 110 V / 190 V / 1 A AC (3-phase / 4-wire) 8: 110 V / 190 V / 5 A AC (3-phase / 4-wire) 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] DC 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.) J: 0 – 5 mA DC (Load resistance 2400 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 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.)

MODEL: LWTN http://www.m-system.co.jp/ LWTN SPECIFICATIONS ES-1976 Rev.2 Page 2/5 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 (open collector) 0: None 1: 2.777 Hz at 100 % input 2: Specify pulse unit (within 0.006 – 3.12 Hz) [5] OPTIONS blank: none /Q: With options (specify the specification) 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: Stand-alone; terminal access at the front Connection: M3.5 screw terminals (torque 0.8 N·m) Screw terminal: Nickel-plated steel (standard) or stainless steel Housing material: Flame-resistant resin (black) Isolation: Voltage input to current input to DC output to pulse output Computation: Time division multiplication 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

  • 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: 1000 % of rating for 3 sec., 200 % 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. [example] 3-phase / 3-wire, measuring wattage 750 kW, VT 3300 / 110 V, CT 250 / 5 A I INPUT RANGE
  • 3-phase / 3-wire
  • Single-phase / 3-wire
  • Single-phase / 2-wire INPUT INPUT INPUT BURDEN (VA) BURDEN (VA) BURDEN (VA) STD.RANGE STD.RANGE STD.RANGE AVAILABLE RANGE AVAILABLE RANGE AVAILABLE RANGE VOLT. VOLT. VOLT. CURR. CURR. CURR. 110V/1A 110V/5A 220V/1A 220V/5A 110V/1A 110V/5A 220V/1A 220V/5A 200V/1A 200V/5A ±200 W ±1000 W ±400 W ±2000 W ±100 W ±500 W ±200 W ±1000 W ±200 W ±1000 W 2.5 2.5 0.1 0.5 0.1 0.5 0.1/ph 0.5/ph 0.1/ph 0.5/ph 0.1/ph 0.5/ph ±100 – ±240 W ±500 – ±1200 W ±200 – ±480 W ±1000 – ±2400 W ±50 – ±120 W ±250 – ±600 W ±100 – ±240 W ±500 – ±1200 W ±100 – ±240 W ±500 – ±1200 W P1: 2.5 P2: 0.2 P1: 2.5 P3: 0.2 P1: 2.5 P3: 0.4 I INPUT RANGE
  • 3-phase / 4-wire INPUT BURDEN (VA) STD.RANGE AVAILABLE RANGE VOLT. CURR. ±200 W ±1000 W 0.1 /phase±100 – ±240 W ±500 – ±1200 W 0.5 /phase P1 – P2 : 2.5 : 0.1 P1 – P2 : 2.5 : 0.3 ±350 W ±1750 W 0.1 /phase±175 – ±420 W ±875 – ±2100 W 0.5 /phase ±400 W ±2000 W 0.1 /phase±200 – ±480 W ±1000 – ±2400 W 0.5 /phase ±700 W ±3500 W 0.1 /phase±350 – ±840 W ±1750 – ±4200 W 0.5 /phase /1A110V √ 3 /5A110V √ 3 /1A190V √ 3 /5A190V √ 3 /1A220V √ 3 /5A220V √ 3 /1A380V √ 3 /5A380V √ 3 : 2.5 P2, P3 : 0.2 : 2.5 P2, P3 : 0.4 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 12 V maximum; 10 V for [±] output
  • DC Voltage: -10 – +12 V DC Minimum span: 5 mV Offset: Max. 1.5 times span

MODEL: LWTN http://www.m-system.co.jp/ LWTN SPECIFICATIONS ES-1976 Rev.2 Page 3/5 Load resistance: Output drive 1 mA max. at ≥ 0.5 V ■ Pulse output: Open collector; 0 Hz at 0 W (cutout at approx. 0.5 – 1.0 %) Rating: 35 V DC @ 100 mA ON voltage: ≤ 1 V at 100 mA Frequency range: 0 – 2.777 Hz (0 – 100 %) standard; 0 – 0.006 Hz through 3.12 Hz is possible.

  • 2.777 Hz at 100 % Input [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. Output Frequeny [Hz] = Calibration Range [kW] × VT Ratio × CT Ratio / Pulse Unit [kWh/pulse] × 3600 [s] 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) 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) 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)

MODEL: LWTN http://www.m-system.co.jp/ LWTN SPECIFICATIONS ES-1976 Rev.2 Page 4/5 CONNECTION DIAGRAM LOAD 1 2 3 SOURCE P2 V P1 U v uFUSE VT V v U u CT L K L K PULSE OUTPUT DC OUTPUT ■ 3-PHASE/3-WIRE ■ SINGLE-PHASE/2-WIRE LOAD 1 2 SOURCE P2 V P1 U v uFUSE VT CT L K PULSE OUTPUT ■ SINGLE-PHASE/3-WIRE LOAD

1 N 2

v uFUSE VT V v U u CT L K L K PULSE OUTPUT LOAD

1 N 2 3

v uFUSE VT V v P3 U u V v P0 U u CT L K L K L K PULSE OUTPUT ■ 3-PHASE/4-WIRE DC OUTPUT DC OUTPUT DC OUTPUT ■ Open Collector Pulse Output Connection Example k l k l k l k l k l k k k l l l

MODEL: LWTN http://www.m-system.co.jp/ LWTN SPECIFICATIONS ES-1976 Rev.2 Page 5/5 EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch) DIN RAIL 35mm wide 8 (.31) M3.5 SCREW (Only on the used terminals) 75 (2.95) TERMINAL COVER 2–5.8 (.23) dia. or 2–4.8 (.18) dia. MTG HOLE 8 (.31) deep

  • When mounting, no extra space is needed between units. 75 (2.95) 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 3 (.12) 1(.04) MOUNTING REQUIREMENTS unit: mm (inch) 2–M5 60 (2.36) 60 (2.36) ■ M5 SCREWS 2–M4 60 (2.36) 50 (1.97) ■ M4 SCREWS Specifications are subject to change without notice.