MODEL: R3-WT1A

R3-WT1A SPECIFICATIONS

ES-8416 Rev.5 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

Range

CLSA-08: 0 – 80 A AC

CLSA-12: 0 – 120 A AC

Operational range: 0 – 115 % of rating

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

■ 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

•Single-phase/2-wire

INPUT

USABLE RANGE

VT BURDEN (VA)

110V / 80A

±8800W

0.2/phase

110V / 120A

±13200W

220V / 80A

±17600W

0.4/phase

220V / 120A

±26400W

•Single-phase/3-wire

INPUT

USABLE RANGE

VT BURDEN (VA)

200V / 80A

±16000W

0.2/phase

200V / 120A

±24000W

•3-phase/3-wire

INPUT

USABLE RANGE

VT BURDEN (VA)

110V / 80A ±15240W /

lag

0.2/phase

110V / 120A ±22860W /

lag

220V / 80A ±30480W /

lag

0.4/phase

220V / 120A ±45730W /

lag

Reactive power data in Lead: Positive, Lag: Negative

Note: Reactive power is invalid in single-phase systems.

Choose VT ratio 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) × (Current Rating)

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) (Except the

sensor’s accuracy.)

Active / reactive power: ±2 % (Add sensor’s accuracy for

overall performance)

Power factor: ±4 % (Add sensor’s accuracy for overall

performance)

Frequency: ±1 %

Active / reactive energy: ±2 % (Add sensor’s accuracy for

overall performance)

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)