MODEL: R3-WT1

R3-WT1 SPECIFICATIONS

ES-8388 Rev.6 Page 2/5

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

INPUT SPECIFICATIONS

Frequency: 50 or 60 Hz

• Voltage Input

Operational range: 0 – 120 % of rating

Overload capacity: 150 % of rating for 10 sec., 120 %

continuous

• Current Input

Operational range: 0 – 120 % of rating

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

sec., 120 % continuous

■ Power Factor Input Range:

-1 – lag 0 – 1 – lead 0 – -1

Data range: -1000 – 0 – 1000 – 0 – -1000 with SW2-1 set to

OFF

A device which employs different measuring methods may

show different outputs from that of M-System's.

■ Frequency Input Range: 45 – 65 Hz

Data range: 4500 – 6500

■ACTIVE / REACTIVE POWER INPUT RANGE

Reactive power is invalid in single-phase systems

•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 /

lead

200 var

0.1/phase

lag

0.2/phase

110V / 5A

±1000W /

0.5/phase

lag

220V / 1A

±400W /

lead

400 var

0.1/phase

lag

0.4/phase

220V / 5A

±2000W /

0.5/phase

lag

Reactive power data in Lead: Positive, Lag: Negative

Choose VT and CT ratios so that the calibration range

calculated by the following equation is within the usable

range in the above table.

Calibration Range [W] =

Measuring Wattage [W]

(VT Ratio) × (CT Ratio)

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: 300 g (0.66 lb)

PERFORMANCE

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

Active / reactive power: ±1 %

Power factor: ±2 %

Frequency: ±1 %

Active / reactive 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 to internal bus or internal power)

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

power supply module)