MODEL: R3-WT4

R3-WT4 SPECIFICATIONS

ES-8391 Rev.7 Page 2/7

http://www.m-system.co.jp/

Operational range: 0 – 120 % of rating

Overload capacity: 1000 % of rating for 3 sec., 200 % for 10

sec., 120% continuous

■ Active Power Input Range

Choose VT and CT ratios so that the calibration range

calculated by the following equation is within the usable

range in the table at the end of this section.

Calibration Range [W] = Measuring Wattage [W] ÷ [(VT

Ratio) × (CT Ratio)]

•Single-phase/2-wire

INPUT

USABLE

BURDEN (VA)

RANGE

VT

CT

110V / 1A

±100W

0.2

0.1

110V / 5A

±500W

0.5

220V / 1A

±200W

0.4

0.1

220V / 5A

±1000W

0.5

•Single-phase/3-wire

INPUT

USABLE

BURDEN (VA)

RANGE

VT

CT

200V / 1A

±200W

0.2/phase

0.1/phase

200V / 5A

±1000W

0.5/phase

•3-phase/3-wire

INPUT

USABLE

BURDEN (VA)

RANGE

VT

CT

110V / 1A

±200W

0.2/phase

0.1/phase

110V / 5A

±1000W

0.5/phase

220V / 1A

±400W

0.4/phase

0.1/phase

220V / 5A

±2000W

0.5/phase

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)

Weight: 600 g (1.3 lb)

PERFORMANCE

Accuracy

(at 23°C ±10°C or 73.4°F ±18°F, 45 – 65 Hz)

Active power: ±1.0 %

Active energy: ±2 %

Magnetic field (ext. origin) effect: ± 0.5 % (400 A/m)

Conversion rate: 100 msec.

Conversion data: 16 bits / 32 bits

Data allocation: 4, 8 or 16 selectable

Current consumption: 150 mA

Response time: ≤ 2 sec. (0 – 100 % ±1 %)

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 2000 V AC @ 1 minute

(voltage input to current input 1 to current input 2 to

current input 3 to current input 4 to internal bus or internal

power)

2000 V AC @ 1 minute (power input to FG; isolated on the

power supply module)