AN2512 datasheet(4/38 Pages) STMICROELECTRONICS

4 / 38 page

Application description

AN2512

4/38

Application description

Three-phase meters (which derive as particular cases from poly-phase systems), are most

commonly used in practical industrial applications, and in a few cases also for domestic use.

This three-phase meter can be used as a reference board to build a Class 0,5 three-phase

microprocessor based meter for power line systems 3-Wire DELTA service, 4-Wires DELTA

and WYE service. It uses a multi-chip topology, in which each phase is monitored using a

single-phase device.

In this way, three STPM01 have been used with a common clock network. The power supply

is implemented in fly-back topology using a VIPer12A.

The meter cannot be used in standalone mode and a management/supervisory board must

be used for energy integration and data displaying. Such a control board should be plugged

in the connector J2 (referring to board schematics below), while the connector J1 is used for

calibration purposes in association (or conjunction) with the STPMxx parallel

programmer/reader released with the application.

1.1

Operating conditions

1.2

Circuit description

The meter consists of one board divided into the following sections:

●

Power supply management circuit

●

Phase circuit

●

Clock management network

●

Connectors.

The schematic of the board is shown in Figure 1.

Table 1.

Operating conditions

Value

Min

Max

Unit

VNOM

480

VRMS

INOM/IMAX

530

ARMS

fLIN

TAMB

- 40

+85

°C

AN2512 Datasheet(PDF) 4 Page - STMicroelectronics

AN2512 Datasheet(HTML) 4 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38

Datasheet Download

Link URL