MODEL: LRPN

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

LRPN SPECIFICATIONS

ES-1978 Rev.2 Page 2/3

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 Var Range

Calibration Range [var] = (Measuring Range) ÷

((VT Ratio) × (CT Ratio))

Check that the required calibration range is within the

available range in the table.

[example]

3-phase / 3-wire, measuring range 75 kvar,

VT 220 / 110 V, CT 250 / 5 A

■ LRPN INPUT RANGE

•3-phase / 3-wire

INPUT

AVAILABLE

BURDEN (VA)

STD.RANGE

RANGE

VOLT.

CURR.

110V/1A

200 var

100 – 240 var

0.1/ph

110V/5A

1000 var

500 – 1200 var

0.5/ph

220V/1A

400 var

200 – 480 var

0.1/ph

220V/5A

2000 var

1000 – 2400 var

0.5/ph

INPUT

AVAILABLE

BURDEN (VA)

STD.RANGE

RANGE

VOLT.

CURR.

1

P

V

0

1

1

0.1

/1A

200 var

100 – 240 var

√

e

s

a

h

p

/

5

.

2

:

3

1

P

V

0

1

3

0.5

/5A 1000 var

500 – 1200 var

√

e

s

a

h

p

/

1

.

0

:

3

P

V

0

9

1

1

0.1

/1A

350 var

175 – 420 var

√

e

s

a

h

p

/

5

.

2

:

3

P

V

0

9

1

2

0.5

/5A 1750 var

875 – 2100 var

√

e

s

a

h

p

/

2

.

0

:

3

P

V

0

2

2

1

0.1

/1A

400 var

200 – 480 var

√

e

s

a

h

p

/

5

.

2

:

3

P

V

0

2

2

3

0.5

/5A 2000 var

1000 – 2400 var

√

e

s

a

h

p

/

3

.

0

:

3

P

V

0

8

3

1

0.1

/1A

700 var

350 – 840 var

√

e

s

a

h

p

/

5

.

2

:

3

P

V

0

8

3

2

0.5

/5A 3500 var

1750 – 4200 var

√

e

s

a

h

p

/

4

.

0

:

3

•3-phase / 4-wire

OUTPUT SPECIFICATIONS

■ 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

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

12

OUT

20mA

0

1000var

(Lead)

1000

(Lag)

0

OUT

+10V

4

12

OUT

20mA

0

OUT

+10V

4

-10V

-10V

0

1000var

(Lead)

1000

(Lag)

0

1000var

(Lead)

1000

(Lag)

0

1000var

(Lead)

1000

(Lag)

• Negative in lag, positive in lead

• Negative in lead, positive in lag

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)