LTWTN-3.PDF datasheet pdf

143 (5.63) 111 (4.37) 72 (2.83) mm (inch)

Typical Applications • Centralized monitoring and control of power management system in a manufacturing facility or building • SCR – Silicon Controlled Rectifier

MODEL: LTWTN–[1][2][3][4][5][6]

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)) = 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]) = 750 ÷ (6.666 × 3600) = 0.03125 [Hz]

Features

• • Provides a DC output signal and a pulse totalizer signal in
• • Convenient pulse unit output (Wh×10
• • Measuring bidirectional power flow
• • DC output containing little ripple is ideal for computer
• • “Time division multiplication” method accepts distorted
• • Isolation up to 2000 V AC
• • High-density mounting
• • Conforms to IEC 60688
• • No auxiliary power supply required

Specifications

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) • Use Ordering Information Sheet (No. ESU-3355).

[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.)