MODEL: R3-WT4B

R3-WT4B SPECIFICATIONS

ES-8384 Rev.5 Page 2/7

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

Range

CLSB-05: 0 – 50 A AC

CLSB-10: 0 – 100 A AC

Operational range: 0 – 115 % of rating

Be sure that the input volage is of 440 V or less.

■ Active Power Input Range

Choose VT ratio so that the calibration range calculated by

the following equation is within the usable range in the next

table.

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

Ratio) × (Current Rating)]

•Single-phase/2-wire

INPUT

USABLE RANGE

VT BURDEN (VA)

110V / 50A

±5500W

0.2/phase

110V / 100A

±11000W

220V / 50A

±11000W

0.4/phase

220V / 100A

±22000W

•Single-phase/3-wire

INPUT

USABLE RANGE

VT BURDEN (VA)

200V / 50A

±10000W

0.2/phase

200V / 100A

±20000W

•3-phase/3-wire

INPUT

USABLE RANGE

VT BURDEN (VA)

110V / 50A

±9526W

0.2/phase

110V / 100A

±19050W

220V / 50A

±19050W

0.4/phase

220V / 100A

±38110W

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: 350 g (0.77 lb)

PERFORMANCE

Accuracy

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

Active power: ±2 %

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 or internal bus or internal power)

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

power supply module)