MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 101

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

© 2009 Microchip Technology Inc.
To avoid complexity in calculation and to maximize the correction precision, the
following equations may be used to approximate K
small.
EQUATION C-80:
EQUATION C-81:
k'
2
k'
=
=
1
k
sin
=
=
2
–
Δ
k
cos
1
Δ
----- - k
50
ϕ
–
f
Power Calculation Theory
Δϕ
≈
⋅
----- - k
50
Δ
sin
f
1
≈
⋅
⋅
Δ
cos
k
2
ϕ
2
⋅
–
Δϕ
k
2
Δ
----- - sin
50
f
–
⋅
Δ
----- - sin
50
f
1
⋅
Δϕ
and K
⋅
2
cos
Δϕ
2
Δϕ
when the phase angle is
DS51723A-page 101