MODEL: LWTN

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

LWTN SPECIFICATIONS

ES-1976 Rev.2 Page 2/5

3W: -1 – +1 V DC (Load resistance 1000 Ω min.)

4W: -10 – +10 V DC (Load resistance 10 kΩ min.)

5W: -5 – +5 V DC (Load resistance 5000 Ω min.)

0: Specify voltage (See OUTPUT SPECIFICATIONS)

[4] PULSE OUTPUT (open collector)

0: None

1: 2.777 Hz at 100 % input

2: Specify pulse unit (within 0.006 – 3.12 Hz)

[5] OPTIONS

blank: none

/Q: With options (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)

COATING (For the detail, refer to M-System's web site.)

/C01: Silicone coating

/C02: Polyurethane coating

/C03: Rubber coating

TERMINAL SCREW MATERIAL

/S01: Stainless steel

GENERAL SPECIFICATIONS

Construction: Stand-alone; terminal access at the front

Connection: M3.5 screw terminals (torque 0.8 N·m)

Screw terminal: Nickel-plated steel (standard) or stainless

steel

Housing material: Flame-resistant resin (black)

Isolation: Voltage input to current input to DC output to

pulse output

Computation: Time division multiplication

Overrange output: Approx. -10 – +120 % at 1 – 5 V

Zero adjustment(DC output): -5 to + 5 % (front)

Span adjustment(DC output): 95 to + 105 % (front)

INPUT SPECIFICATIONS

Frequency: 50 or 60 Hz

• Voltage Input

Operational range: 85 – 110 % of rating

Overload capacity: 150 % of rating for 10 sec., 110 %

continuous

• Current Input

Operational range: 0 – 120 % of rating

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

sec., 120 % continuous

■ How To Determine Wattage Range

Calibration Range [W] = (Measuring Wattage) /

((VT Ratio) × (CT Ratio))

Check that the required calibration range is within the

available range in the table.

[example]

3-phase / 3-wire, measuring wattage 750 kW,

VT 3300 / 110 V, CT 250 / 5 A

I INPUT RANGE

•

3-phase / 3-wire

•

Single-phase / 3-wire

•

Single-phase / 2-wire

INPUT

INPUT

INPUT

BURDEN (VA)

BURDEN (VA)

BURDEN (VA)

STD.RANGE

STD.RANGE

STD.RANGE

AVAILABLE

RANGE

AVAILABLE

RANGE

AVAILABLE

RANGE

VOLT.

VOLT.

VOLT.

CURR.

CURR.

CURR.

110V/1A

110V/5A

220V/1A

220V/5A

110V/1A

110V/5A

220V/1A

220V/5A

200V/1A

200V/5A

±200 W

±1000 W

±400 W

±2000 W

±100 W

±500 W

±200 W

±1000 W

±200 W

±1000 W

2.5

2.5

0.1

0.5

0.1

0.5

0.1/ph

0.5/ph

0.1/ph

0.5/ph

0.1/ph

0.5/ph

±100 –

±240 W

±500 – ±1200 W

±200 –

±480 W

±1000 – ±2400 W

±50 – ±120 W

±250 – ±600 W

±100 – ±240 W

±500 – ±1200 W

±100 – ±240 W

±500 – ±1200 W

I INPUT RANGE

• 3-phase / 4-wire

INPUT

BURDEN (VA)

STD.RANGE

AVAILABLE

RANGE

VOLT. CURR.

±200 W

±1000 W

0.1

/phase

±100 – ±240 W

±500 – ±1200 W

0.5

/phase

: 2.5

: 0.1

: 2.5

: 0.3

±350 W

±1750 W

0.1

/phase

±175 – ±420 W

±875 – ±2100 W

0.5

/phase

±400 W

±2000 W

0.1

/phase

±200 – ±480 W

±1000 – ±2400 W

0.5

/phase

±700 W

±3500 W

0.1

/phase

±350 – ±840 W

±1750 – ±4200 W

0.5

/phase

/1A

110V

√ 3

__

/5A

110V

√ 3

__

/1A

190V

√ 3

__

/5A

190V

√ 3

__

/1A

220V

√ 3

__

/5A

220V

√ 3

__

/1A

380V

√ 3

__

/5A

380V

√ 3

__

: 2.5

: 0.2

: 2.5

: 0.4

OUTPUT SPECIFICATIONS

■ DC Output

• DC Current: -10 – + 20 mA DC

Span: Min. 1 mA, max. 20 mA

Offset: Max. 1.5 times span

Load resistance: Output drive 12 V maximum; 10 V for [±]

output

• DC Voltage: -10 – +12 V DC

Minimum span: 5 mV

Offset: Max. 1.5 times span