MODEL: KEWTN

KEWTN SPECIFICATIONS

ES-3671 Rev.2 Page 2/4

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

steel

Housing material: Flame-resistant resin (black)

Isolation: Voltage input to current input to output

Computation: Time division multiplication

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

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

Span adjustment: 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. Specify this range when

ordering.

[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

OUTPUT SPECIFICATIONS

■ DC Current: 0 – 20 mA DC and ± 1 mA

Minimum span: 1 mA

Offset: Max. 1.5 times span

Load resistance: Output drive 12 V max.

■ DC Voltage: -10 – +12 V DC

Minimum span: 5 mV

Offset: Max. 1.5 times span

Load resistance: Output drive 1 mA max. at ≥ 0.5 V

500

1000 W

0

12

OUT

20 mA

500

1000 W

0

5

OUT

10 V

4

0

+1000 W

-1000 W

12

OUT

20 mA

0

+1000 W

-1000 W

0

OUT

+10 V

4

-10 V

s OPERATION DIAGRAM (example)

INSTALLATION

Operating temperature: -10 to +55°C (14 to 131°F)

Operating humidity: 30 to 85 %RH (non-condensing)

Mounting: Surface or DIN rail

Weight: 450 g (0.99 lb)

PERFORMANCE in percentage of span

Accuracy: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,

45 – 65 Hz)

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

Ripple: 0.5 %p-p max.

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 2000 V AC @ 1 minute

(voltage input to current input to output to ground)

Impulse withstand voltage: 1.2 / 50 μsec., ±5 kV

(input to output or ground)