MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 85

• 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.
The relationship between u
EQUATION C-31:
EQUATION C-32:
Total effective voltage can be expressed as:
EQUATION C-33:
Similarly, the effective values and initial phase angles of fundamental current and
current of each other harmonic can be expressed as:
EQUATION C-34:
EQUATION C-35:
The relationship between i
EQUATION C-36:
EQUATION C-37:
Total current RMS can be expressed as:
EQUATION C-38:
ak
ak
, i
, u
bk
I
bk
k
and I
u
=
u
U
and U
i
i
I
bk
ak
bk
ak
total
total
------ - i
Power Calculation Theory
1
=
ϕ
=
2
=
=
k
ik
⋅
can be expressed as:
=
=
k
ck
=
2 U
2 U
2 I
can be expressed as:
2 I
⋅
⋅
⋅
⋅
=
atan
k
k
∑
∑
∞
=
k
∞
=
k
k
k
⋅
⋅
0
0
⋅
⋅
i
------------------------ -
cos
U
i
----- -
i
sin
I
cos
sin
ak
ak
bk
k
k
2
2
2
ϕ
ϕ
ϕ
ϕ
+
2
ik
ik
uk
uk
i
bk
2
DS51723A-page 85