ES-8424 Rev.8

R3-WTU

Remote I/O R3 Series

MULTI POWER INPUT MODULE

(clamp-on current sensor type CLSE use)
Functions & Features
• Measures simultaneously several variables of a heavy-current power system including computing bidirectional current, phase and harmonics
• 1 or 2 systems
• Uses clamp-on current sensors; No need of current transformers
• Current sensors are easy to install in existing systems
Typical Applications
• Energy demand management in manufacturing
plants and buildings
• Multi-functional power monitor incorporated in electric devices or in switching boards: saves space, wiring works, and cost
 

MODEL: R3–WTU1[1]E[2][3]

ORDERING INFORMATION

• Code number: R3-WTU1[1]E[2][3]
Specify a code from below for each of [1] through [3].
  (e.g. R3-WTU12ES/D/Q)
• Specify the specification for option code /Q
  (e.g. /C01)

CONFIGURATION

1: Single-phase / 2-wire and 3-wire, 
    3-phase / 3-wire and 4-wire

[1] NO. OF SYSTEMS

1: 1 system
2: 2 systems

INPUT

E: 480 V AC / Sensor type CLSE

[2] COMMUNICATION MODE

S: Single
W: Dual

[3] OPTIONS (multiple selections)

Data Capacity (address/slot occupied)
blank: 16 words (1)
/D: 32 words (2)
Be sure to use the R3-BSW base with free address setting
capability. Refer to ‘TRANSMISSION DATA DESCRIPTIONS.’
Other Options
blank: none
/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q

COATING (For the detail, refer to our web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating

RELATED PRODUCTS

• PC configurator software (model: R3CON)
Downloadable at our web site.
• Clamp-on current sensor (model: CLSE)
The clamp-on current sensors, not included in this product package, must be ordered separately. Required number depends upon the system configuration.
• Network module (model: R3-Nx, R30Nx)
Data resetting from the host device is possible with: V.2.00 or higher versions of the R3-NC1, R3-NC3, R3-NE1 and
R3-NM1; V.1.06 or higher versions of the R3-NCIE1; and V.1.06 or higher versions of the R30NECT1, R330NCIE1, and R30NE1. (Confirm the firmware version on R3CON.)
For other versions and models, use R3CON PC Configurator to reset data.
For use with the R3-NLx, consult us.

GENERAL SPECIFICATIONS

Connection
  Internal bus: Via the Installation Base (model: R3-BSx)
  Voltage input: Separable terminal block
  (applicable wire dia. ≤ 2.5, 0.5 – 3.5 mm2, stripped
  length 7 mm)
  Current input: Separable terminal block
  (applicable wire dia. ≤ 2.4, 0.5 – 3.5 mm2, stripped
  length 10 mm)
  Internal Power: Via the Installation Base (model: R3-BSx)
Configuration: Single phase/2-wire and 3-wire, 3-phase/3-wire balanced/unbalanced load, 3-phase/4-wire balanced/unbalanced load
Isolation: Sensor core to sensor output or current input or voltage input to internal bus or internal power
Measured variables
  Voltage: 1 – N, 2 – N, 3 – N, 1 – 2, 2 – 3, 3 – 1
  Current: 1, 2, 3, N
  Active / reactive / apparent power: 1, 2, 3, Σ
  Power factor: 1, 2, 3, Σ
  Frequency
  Active energy: Incoming / outgoing
  Reactive energy: Incoming / outgoing / lag (inductive)
  /lead (capacitive)
  Apparent energy
  Active / reactive / apparent power intervals (demand) 
  Average (demand) current: 1, 2, 3, N
  Harmonic contents: Σ
  Voltage: 1 – N, 2 – N, 3 – N, 1 – 2, 2 – 3, 3 – 1
  Current: 1, 2, 3, N
  Max. and min. values
  Demand history: 1 to 4
  (Programmable within 1 – 60 min.; factory set to 30 min.)
RUN indicator: Bi-color (red/green) LED;
Red when the bus A operates normally;
Green when the bus B operates normally;
Amber when both buses operate normally.
ERR indicator: Bi-color (red/green) LED;
Red with input abnormality (input ≥ 120 %, frequency out of 45 – 65 Hz range);
Green in normal operating conditions.
Low-end cutout: Converted as 0 % for the input below a preset value; programmable within 0 – 99.9 %; factory set to 1 %
Data resetting: All energy values; MAX / MIN current values; MAX / MIN values other than current; and AVG (demand) values
Data resetting from the host device is possible with: V.2.00 or higher versions of the R3-NC1, R3-NC3, R3-NE1 and
R3-NM1; V.1.06 or higher versions of the R3-NCIE1; and V.1.06 or higher versions of the R30NECT1, R30NCIE1, and R30NE1. (Confirm the firmware version on R3CON.)

INPUT SPECIFICATIONS

Frequency: 50 / 60 Hz (45 – 65 Hz)
• Voltage Input
Rated voltage
Line-to-line (delta voltage): 480 V
Line-neutral (phase voltage): 277 V (single-phase / 2-wire and 3-wire)
Consumption VA: ≤ ULN2 / 300 kΩ / phase
Overload capacity: 200 % of rating for 10 sec., 120 % continuous
Selectable primary voltage range: 50 – 400 000 V
• Current Input
CLSE-R5: 0 – 5 A AC
CLSE-05: 0 – 50 A AC
CLSE-10: 0 – 100 A AC
CLSE-20: 0 – 200 A AC
CLSE-40: 0 – 400 A AC
CLSE-60: 0 – 600 A AC
Overload capacity: 120 % continous, 500 % for 10 sec.
Note: Use for the circuit not exceed 480 V
Selectable primary current range: 1 – 20 000 A (only with CLSE-R5, refer to the configurator settings)
Operational range
Current: 0 – 115 % of the rating
Voltage, apparent power: ≤ 120 % of the rating
Active/reactive power: ±120 % of the rating
Frequency: 45 – 65 Hz
Power factor: ±1

INSTALLATION

Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Atmosphere: No corrosive gas or heavy dust
Mounting: Installation Base (model: R3-BSx)
Use the R3-BSW with Option /D.
Weight: 170 g (0.37 lb)

PERFORMANCE in percentage of span

Accuracy (at 23°C ±10°C or 73.4°F ±18°F, 45 – 65 Hz)
Add the accuracy of the current sensor for overall values.
  Voltage: ±1.0 % of the rating
  Current: ±1.0 % of the rating
  Power: ±1.0 % of the rating
  Power factor: ±3.0 %
  Frequency: ±1.0 % of the rating
  Energy: ±2 %
  Harmonic contents: ±2.5 % of the rating
Conversion data: 16 bits / 32 bits
Data allocation mode: 16 or 32
(Refer to ‘TRANSMISSION DATA DESCRIPTIONS.’)
Current consumption: 60 mA
Input response time: ≤ 2 sec. (0 – 100 % ±1 %)
≤3 sec. for frequency and harmonic contents
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute (voltage input or current input to internal　bus or internal power)
2000 V AC @ 1 minute (sensor core to sensor output)
2000 V AC @ 1 minute (power input to FG; isolated on the power supply module)

TRANSMISSION DATA DESCRIPTIONS

■ MEASURANDS
• 16-word Mode (standard)
Measurands and assigned word numbers are specified using the R3CON PC Configurator.
Max. 16 words per module (slot). 1 word = 16 bits, 2 words
= 32 bits
• 32-word Mode (option /D)
Measurands and assigned word numbers are specified using the R3CON PC Configurator.
Max. 32 words by virtually assigning addresses (n) and (n+1) per module. 1 word = 16 bits, 2 words = 32 bits
Be sure to use the R3-BSW base with free address setting capability. DO NOT assign the address (n+1) to any module.
A duplicate address will cause malfunctions.
■ RESET
Measurands to be reset can be specified among: all energy values, MAX / MIN current values, MAX / MIN values other than current and AVG (demand) values.
Refer to ‘I/O DATA DESCRIPTIONS’ in the R3-WTU instruction manual for resetting from the host device.
For detailed information for the selection of measurands and other settings, refer to the R3CON Users Manual.

EXTERNAL VIEW

EXTERNAL DIMENSIONS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM