MCP3909RD-3PH3 Microchip Technology, MCP3909RD-3PH3 Datasheet - Page 13

• Manufacturer Part Number: MCP3909RD-3PH3
• Description: REF DESIGN FOR MCP3909 W/18F2520
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH3

• Main Purpose: Power Management, Energy/Power Meter
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

1.3
© 2008 Microchip Technology Inc.
GETTING STARTED
To describe how to use the MCP3909 3-Phase Energy Meter Reference Design, the
following example is given using both a 4-Wire 3-phase, 220VAC line voltage and
connections using an energy meter calibrator equipment or other programmable load
source. The meter design uses a 5A load for calibration current and a maximum current
(I
All connections described in this section are dependent on the choice of current
sensing element and a secondary external transformer may be required in higher
current meter designs.
For testing a calibrated meter, the following connections apply for a 4-wire connection.
1.3.1
FIGURE 1-3:
1.3.2
The meter will turn on when the line connection has 220V connected to any of the three
phases.
1.3.3
After connecting the USB cable to a computer running Windows
meter should be recognized as a HID (Human Interface Device) compliant USB device.
FIGURE 1-4:
MAX
) of 10A.
Step 1: Wiring for 4-Wire Line and Load connections
Step 2: Turn On Line/Load Power to the Meter (Power the
Meter).
Step 3: Connect isolated USB Interface Module.
Line
Phase A
Example Connections using a 4-Wire System.
USB Interface Connections
Load
Line
Phase B
Load
Product Overview
Line
Phase C
Load
®
operating system, the
Neutral
DS51643B-page 9