51U

Specifications subject to change without notice.

GENERAL SPECIFICATIONS

surface, cylindric body

Connection

Input & auxiliary power: M4 screw terminals

Output: M3 screw terminals

Housing material: plastic (black)

Isolation:

input to output to power; not isolated

between analog outputs

Scaling:

primary values for CT and VT; tertiary

value for GVT (Inform M-System CT and

VT ratios when ordering.)

CT:5 – 8000A (up to 15000A for Code K)

VT:110 – 77kV

GVT:

63.5 – 190.5V

Time lag for demand: 0 sec., 30 sec. or 1, 2, 3, 5, 7,

10, 15, 30 min. (default: 15 min.)

Sampling cycle: 400 µsec. (DO NOT connect a

device such like inverters.)

Measurable frequency ranges: 45 – 44 Hz, 55 – 65

Hz, 45 – 65 Hz

Low-end cutout: Display shows 0 for the input less

than the following: approx. 1% for current,

watt and var; approx. 3% for voltage.

INPUT

■VOLTAGE INPUT

(must be balanced with 3-phase connection)

Operational range

Voltage, watt, var, zero-phase voltage: 0 – 100% of rat-

ing

Power factor: ≥30V

Frequency: ≥30V

Overload capacity: 200% of rating for 60 sec.,

115% for 3 hours

Input burden: 0.3VA/phase

■CURRENT INPUT

(may be unbalanced with 3-phase connection)

Operational range

Current, watt, var, demand: 0 – 100% of rating

Power factor: ≥5% of rating

Overload capacity: 4000% of rating for 1 sec., 2000%

for 60 sec., 115% for 3 hours

Input burden: 0.1VA/phase

■REMOTE CONTROL

Display switching: same functions as the front

DISPLAY button does; input time ≥0.3

sec., input current 5mA

Reset input: max. zero-phase voltage and demand;

input time ≥0.3 sec., input current 5mA

OUTPUT

■CURRENT OUTPUT: 4 – 20mA DC

Load resistance: 500Ω maximum

DISPLAY ITEMS

RATING

INPUT RANGE

Current

5A

0 – 5A

Voltage

1ø / 2w 1 – 2

105V

0 – 150V

1ø / 3w 1 – N 105V

0 – 150V

2 – N 105V

0 – 150V

1 – 2

210V

0 – 300V

3ø / 3w line

110V

0 – 150V

220V

0 – 300V

3ø / 4w line

110V

0 – 150V

phase 110 / √ 3 V 0 – 150 / √ 3 V

Watt

110V / 5A 0 – 1 kW (0 – 5 kW)

110V / 5A -1 – +1 kW (-0.5 – +0.5 kW)

220V / 5A 0 – 2 kW

220V / 5A -2 – +2 kW

Var110V / 5A 0 – lag1 kvar

(0 – lag500 var)

110V / 5A lead1 – lag1 kvar

(lead500 – lag 500 var)

220V / 5A 0 – lag2 kvar

220V / 5A lead2 – lag2 kvar

Power factor

––

lead 50 – 100 – lag 50 %

Frequency

––

45.0 – 55.0 Hz

55.0 – 65.0 Hz

45.0 – 65.0 Hz

Max. zero-phase voltage 63.5V

0 – 86.6V

110.0V

0 – 150.0V

190.5V

0 – 259.8V

Demand

5A

0 – 5A, element S

Maximum demand

5A

0 – 5A, element S

Remarks:

1) Values for single-phase connection in brackets.

2) Displays are automatically scaled according to the scal-

ing factor settings for VT and CT.

3) Reverse or lead flow are displayed with the negative (–)

indicator.

■PULSE OUTPUT: totalizing watt in forward flow or

var in lag.

Scaling factor: 0.01, 0.1, 1, 10, 100 kWh/pulse

(default: 1)

Contact rating: 110V DC @0.1A (resistive load)

110V AC @0.1A (resistive load)

Pulse width time: 100 – 150 msec.

(pulse rate ≤12000 pulses/h)

■TRANSMISSION OUTPUT (Multi-Meter Protocol)

Transmission: conform to RS-485, EIA

Transmission distance: 1 kilometer max. (≤31 units)

Cable:

shielded twisted-pair cable (CPEV-S 0.9 dia.)

Terminator: incorporated

■DEMAND ALARM CONTACT OUTPUT

Alarm setpoint: 5 – 100%; adjustable in 0.5% incre-

ments

Contact rating: 110V DC @0.1A (resistive load)

ON resistance: ≤50Ω

I/O RANGES

Proportional to 4 – 20mA DC

P. 2 / 16

ES-6481 Rev.9