Schneider Electric PowerLogic PM5300 Series Specifikace stáhnout pdf (Strana 20)

Power Meter 750 63230-507-201A1

Section 4—Metering 03/2007

MODBUS RS485

Pulse Output

Digital Inputs

MIN/MAX VALUES FOR REAL-TIME

READINGS

When certain readings reach their highest or lowest value, the Power Meter

saves the values in its nonvolatile memory. These values are called the

minimum and maximum (min/max) values. The min/max values stored since

the last min/max reset can be viewed using the Power Meter display. See

Table 4– 1 for a list of the minimum and maximum values stored in the

PM750. The min/max value for power is based on the unsigned value of

power.

POWER FACTOR MIN/MAX

CONVENTIONS

The min/max value for power factor is based on the unsigned value of

power factor. See “How Signed Power Factor is Stored in the Register” on

page 48 for more information on power factor.

DEMAND READINGS The power meter provides a variety of demand readings. Table 4– 2 lists the

available demand readings and their reportable ranges.

Local or Remote Setup

Type of distribution system

3-phase 3- or 4-wire with 1, 2, or 3 CTs, two- or

single-phase

Rating of current transformers

Primary 5 to 32,767 A

Secondary 5 or 1 A

Voltage

Primary 3,276,700 V max

Secondary 100, 110, 115, 120

Calculation interval for demand currents 1 to 60 minutes

Calculation interval for demand power 1 to 60 minutes

Table 4– 1: Power Meter Characteristics (continued)

Functions

RS485 link 2-wire

Communication protocol MODBUS RTU

Settings

Communication address 1 to 247

Baud rate (communication speed) 2400, 4800, 9600, 19200 baud

Parity none, even, odd

Pulse Output

Three Modes: External Control, Alarm

Mode, Active Energy Pulse

Solid state relay

Digital Inputs

Two Modes: Normal, Demand Sync 2 digital outputs

Table 4– 2: Demand Readings

Demand Readings Reportable Range

Demand Current, Per-Phase

Last Complete Interval

Peak

0 to 32,767 A

Demand Real Power, 3Ø Total

Last Complete Interval

Peak

0 to 3276.70 MW

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 67 68

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