LTWT

LTWT MSYSTEM | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 9

Technical content

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 1/9 https://www.m-system.co.jp/ Power Transducer Series LT-UNIT WATT TRANSDUCER Functions & Features

• Provides a DC output signal and a 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
• Conforms to IEC 60688 Typical Applications
• Centralized monitoring and control of power management system in a manufacturing facility or building
• SCR – Silicon Controlled Rectifier 143 (5.63) 111 (4.37) (2.83) mm (inch) MODEL: LTWT–[1][2][3][4][5]–[6][7]

ORDERING INFORMATION

• Code number: LTWT–[1][2][3][4][5]–[6][7] Specify a code from below for each of [1] through [7]. (e.g. LTWT-115A2-R/T/Q)
• Special output range (For codes Z & 0)
• Specify the specification for option code /Q (e.g. /C01)
• 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 = 6.666 × 10–3 [kWh/pulse] = 6.666 [Wh/pulse] Check that the required pulse unit is within the available frequency range, 0.006 – 3.12 Hz. Input Range [W] ÷ (Calculated Pulse × 3600 [s]) = 0.03125 [Hz] [1] CONFIGURATION 1: 3-phase / 3-wire 2: Single-phase / 2-wire 3: Single-phase / 3-wire 4: 3-phase / 4-wire [2] VT INPUT (unbalanced load) For 3-phase / 4-wire, phase voltages (e.g. 110 V / √3 ) are used. 1: 100, 110, 115, 120 V AC (Not selectable for single-phase / 3-wire system.) 2: 190, 200, 210, 220, 230, 240 V AC (Not selectable for single-phase / 3-wire system.) 4: 380, 400, 415, 430, 440, 480 V AC (Not selectable for single-phase / 3-wire system.) A: 100 V / 200 V AC (single-phase / 3-wire only) [3] CT INPUT (unbalanced load) Current 1: 1 A AC 2: 2 A AC 5: 5 A AC [4] DC OUTPUT Current 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 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.)

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 2/9 https://www.m-system.co.jp/ 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) [5] PULSE OUTPUT (open collector) 0: None 1: 2.777 Hz at 100 % input 2: Specify pulse unit (within 0.006 – 3.12 Hz) [6] AUXILIARY POWER SUPPLY AC Power K3: 100 – 120V AC (Operational voltage range 85 - 132 V, 47 - 66 Hz) L3: 200 – 240V AC (Operational voltage range 170 - 264 V, 47 - 66 Hz) DC Power R: 24 V DC (Operational voltage range 24 V ±10 %, ripple 10 %p-p max.) V: 48 V DC (Operational voltage range 48 V ± 10 % , ripple 10 % p-p max.) P: 110 V DC (Operational voltage range 85 – 150 V, ripple 10 %p-p max.) (CE not available) [7] OPTIONS (multiple selections) Terminal Cover blank: Without /T: With Custom specification (Refer to the custom specification list for difference of specification and combination of code numbers.) blank: none /X1: Input range /X2: Input span Other Options blank: none /Q: Option other than the above (specify the specification) SPECIFICATIONS OF OPTION: Q COATING (For the detail, refer to M-System's web site.) /C01: Silicone coating /C02: Polyurethane coating /C03: Rubber coating GENERAL SPECIFICATIONS Connection: M4 screw terminals (torque 1.2 N·m) Screw terminal: Chrome-plated steel Housing material: Flame-resistant resin (black) Isolation: Voltage input to current input to DC output to pulse output to auxiliary power 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 SPECIFICATIONS Frequency: 50 or 60 Hz

• Voltage input Operational range: 0 – 120 % of rating Overload capacity: 200 % of rating for 10 sec., 120 % continuous
• Current input Operational range: 0 – 120 % of rating Overload capacity: 4000 % of rating for 1 sec., 2000 % for 4 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

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 3/9 https://www.m-system.co.jp/

• Single-phase / 2-wire INPUT BURDEN (VA) STD.RANGE USABLE RANGE VT CT ±100 W ±2 00 W ±5 00 W 0.2 0.1 0.2 0.5 ±50 – ±120 W ±100 – ±240 W ±250 – ±600 W VT/CT CODE ±200 W ±4 00 W ±1000 W 0.4 0.1 0.2 0.5 ±200 – ±480 W ±500 – ±1200 W ±400 W ±8 00 W ±2000 W 0.6 0.1 0.2 0.5 ±400 – ±960 W ±1000 – ±2400 W ±100 – ±240 W ±200 – ±480 W
• Single-phase / 3-wire INPUT BURDEN (VA) STD.RANGE USABLE RANGE VT CT A/1 A/2 A/5 ±200 W ±4 00 W ±1000 W 0.2 /phase 0.1/ph 0.2/ph 0.5/ph ±100 – ±240 W VT/CT CODE ±200 – ±480 W ±500 – ±1200 W
• 3-phase / 3-wire INPUT BURDEN (VA) STD.RANGE USABLE RANGE VT CT ±200 W ±4 00 W ±1000 W 0.2 /phase 0.1/ph 0.2/ph 0.5/ph ±100 – ±240 W ±200 – ±480 W ±500 – ±1200 W VT/CT CODE ±400 W ±8 00 W ±2000 W 0.4 /phase 0.1/ph 0.2/ph 0.5/ph ±400 – ±960 W ±1000 – ±2400 W ±800 W ±1600 W ±4000 W 0.6 /phase 0.1/ph 0.2/ph 0.5/ph ±800 – ±1920 W ±2000 – ±4800 W ±200 – ±480 W ±400 – ±960 W
• 3-phase / 4-wire INPUT BURDEN (VA) STD.RANGE USABLE RANGE VT CT ±200 W ±4 00 W ±1000 W 0.1 /phase 0.1/ph 0.2/ph 0.5/ph ±100 – ±240 W ±200 – ±480 W ±500 – ±1200 W VT/CT CODE ±400 W ±8 00 W ±2000 W 0.3 /phase 0.1/ph 0.2/ph 0.5/ph ±400 – ±960 W ±1000 – ±2400 W ±800 W ±1600 W ±4000 W 0.4 /phase 0.1/ph 0.2/ph 0.5/ph ±800 – ±1920 W ±2000 – ±4800 W ±200 – ±480 W ±400 – ±960 W 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 Offset: Max. 1.5 times span 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. 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 Power Consumption
• AC: Approx. 2 VA
• DC: Approx. 2 W (18 mA at 110 V) 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.(The output ripple may increase when there is great difference between the frequencies of input signal and power supply) Line voltage effect: ±0.25 % over operational voltage range (Operational voltage range is [K3: 90 to 132 V AC], [L3: 180 to 264 V AC] when the DC output code is 4W or the specified voltage is ≤ -9 V) Insulation resistance: ≥ 100 MΩ with 500 V DC Dielectric strength: 2000 V AC @ 1 minute

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 4/9 https://www.m-system.co.jp/ (voltage input to current input to DC output to pulse output to auxiliary power to ground) Impulse withstand voltage: 1.2 / 50 μsec., ±5 kV (input to output or ground) STANDARDS & APPROVALS EU conformity: EMC Directive EMI EN 61000-6-4 EMS EN 61000-6-2 Low Voltage Directive EN 61010-1 Measurement Category II (input) Installation Category II (auxiliary power) Pollution Degree 2 Input to output or auxiliary power: Reinforced insulation (550 V) Output to auxiliary power: Reinforced insulation (300 V) RoHS Directive

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 5/9 https://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 PULSE OUTPUT DC 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 PULSE OUTPUT ■ SINGLE-PHASE/3-WIRE LOAD

1 N 2

v uFUSE VT V v U u k l CT L K k l L K PULSE OUTPUT * The transducer can be powered from the input voltage when the voltage is sufficiently stable and meets within the range of auxiliary power supply of the unit specified in the data sheet/instruction manual. LOAD

1 N 2 3

v uFUSE VT V v P3 U u V v P0 U u k l CT L K k l L K k l L K PULSE OUTPUT ■ 3-PHASE/4-WIRE DC OUTPUT DC OUTPUT DC OUTPUT U(+) V(–) AUXILIARY POWER ■ Open Collector Pulse Output Connection Example * 15 U(+) V(–) AUXILIARY POWER

15 U(+)

V(–) AUXILIARY POWER V(–) AUXILIARY POWER

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 6/9 https://www.m-system.co.jp/ EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch] 1 2 3 4 5 6 11 12 13 14 15 16 7 8 9 10 54 (2.13) (.12) DIN RAIL 35mm wide 8 (.31) 2–M4 MTG HOLE 98 (3.86) 80 (3.15) 111 (4.37) 16–M4 SCREW TERMINAL COVER (option /T) 10 (.39)

• When mounting, no extra space is needed between units. Specifications are subject to change without notice.

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 7/9 https://www.m-system.co.jp/ CUSTOM SPECIFICATION LIST Refer to the following pages for each detailed custom specification. Custom specification: Option /X1 ■ Major specification changes Input 0%: -65 - 0 % of input 100% (W) Custom specification: Option /X2 ■ Major specification changes Input span: 10 - 50 % for input span of standard input range

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 8/9 https://www.m-system.co.jp/ CUSTOM SPECIFICATION : OPTION /X1 Major specification changes Input 0%: -65 - 0 % of input 100% (W) MODEL: LTWT–[1][2][3][4][5]–[6][7]/X1 Same as standard specification (without customization) except followings. Refer to standard specification pages.

• Code number: LTWT–[1][2][3][4][5]–[6][7]/X1 For each of [1] through [7] same code as standard specification is available. Use Ordering Information Sheet (No. ESU-3355). (e.g. LTWT-115A0-R/T/X1) Refer to standard specification pages. SPECIFICATION CHANGES ■ Input specifications
• Available input range The value for 0% is within -65 - 0 % of input 100%. e.g. Input range: -75 to 1000 [W] ■ Standards & approval
• CE not available 0 -75 -75+1000 W-1000 0 +1000 W-1000 -10 ■ OPERATION DIAGRAM (example) 20 mA OUTPUT INPUT +10 V OUTPUT INPUT

MODEL: LTWT LTWT SPECIFICATIONS ES-3355 Rev.18 Page 9/9 https://www.m-system.co.jp/ CUSTOM SPECIFICATION : OPTION /X2 Major specification changes Input span: 10 - 50 % of input span of std. input range MODEL: LTWT–[1][2][3][4][5]–[6][7]/X2 Same as standard specification (without customization) except followings. Refer to standard specification pages.

• Code number: LTWT–[1][2][3][4][5]–[6][7]/X2 For each of [1] through [7] same code as standard specification is available. Use Ordering Information Sheet (No. ESU-3355). (e.g. LTWT-115A0-R/T/X2) Refer to standard specification pages. SPECIFICATION CHANGES ■ Input specifications
• Available input range: Refer to the table shown right. ■ PERFORMANCE Accuracy (including influence from temperature and frequency): Refer to the table shown right. e.g. 3-phase / 3-wire, 100 V, 5 A Input range: -350 - +350 W As input span is 35 % for std. range (-1000 - +1000 W), accuracy is ±0.8 %. ■ Standards & approval
• CE not available
• INPUT RANGE CONFIGURATION VT/CT CODE STD. RANGE USABLE RANGE Single-phase/ 2-wire 1/1 ±100 W ±10 – ±50 W 1/2 ±200 W ±20 – ±100 W 1/5 ±500 W ±50 – ±250 W 2/1 ±200 W ±20 – ±100 W 2/2 ±400 W ±40 – ±200 W 2/5 ±1000 W ±100 – ±500 W 4/1 ±400 W ±40 – ±200 W 4/2 ±800 W ±80 – ±400 W 4/5 ±2000 W ±200 – ±1000 W Single-phase/ 3-wire A/1 ±200 W ±20 – ±100 W A/2 ±400 W ±40 – ±200 W A/5 ±1000 W ±100 – ±500 W 3-phase/3-wire 3-phase/4-wire 1/1 ±200 W ±20 – ±100 W 1/2 ±400 W ±40 – ±200 W 1/5 ±1000 W ±100 – ±500 W 2/1 ±400 W ±40 – ±200 W 2/2 ±800 W ±80 – ±400 W 2/5 ±2000 W ±200 – ±1000 W 4/1 ±800 W ±80 – ±400 W 4/2 ±1600 W ±160 – ±800 W 4/5 ±4000 W ±400 – ±2000 W
• ACCURACY INPUT SPAN ACCURACY ≥ 10 – < 25% of std. range ±1 .5% ≥ 25 – < 30% of std. range ±1 .0% ≥ 30 – < 35% of std. range ±0.9% ≥ 35 – < 40% of std. range ±0.8% ≥ 40 – < 45% of std. range ±0.7% ≥ 45 – < 50% of std. range ±0.6%