·Some details are not shown. Please refer to specification sheets for all information.

LTRP

Power Transducer Series LT-UNIT

VAR TRANSDUCER

Functions & Features
• Providing a DC output signal in proportion to AC reactive power
• 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
 

MODEL: LTRP–[1][2][3][4][5]–[6][7]

ORDERING INFORMATION
• Code number: LTRP–[1][2][3][4][5]–[6][7]
Specify a code from below for each [1] through [7].
  (e.g. LTRP-115PA-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).

[1] CONFIGURATION
1: 3-phase / 3-wire
4: 3-phase / 4-wire

[2] VT INPUT (balanced load)
For 3-phase / 4-wire, phase voltages (e.g. 110 V / √3 ) are used.
1: 100, 110, 115, 120 V AC
2: 190, 200, 210, 220, 230, 240 V AC
4: 380, 400, 415, 430, 440, 480 V AC

[3] CT INPUT (unbalanced load)
Current
1: 1 A AC
2: 2 A AC
5: 5 A AC

[4] OUTPUT SIGNAL POLARITY
P: Negative in lag, positive in lead
M: Negative in lead, positive in lag

[5] OUTPUT
Current
A: 4 – 20 mA DC (Load resistance 500 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
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)

[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 output to auxiliary 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
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 Var Range
Calibration Range [var] = (Measuring Range) ÷
((VT Ratio) × (CT Ratio))
Check that the required calibration range is within the available range in the table.
[example]
3-phase / 3-wire, measuring range 75 kvar,
VT 220 / 110 V, CT 250 / 5 A
(75 × 103 [var])÷((220 / 110) × (250 / 5))= 750 [var]

OUTPUT SPECIFICATIONS
■ 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

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 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
(voltage input to current input to 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, output)
 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
  EN 50581

CONNECTION DIAGRAM

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

M-System Co., Ltd.