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參數(shù)資料
| 型號(hào)： | ADE7760ARSRL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Energy Metering IC with On-Chip Fault Detection |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | MO-150AE, SSOP-20 |
| 文件頁數(shù)： | 18/24頁 |
| 文件大小： | 514K |
| 代理商： | ADE7760ARSRL |
ADE7760
Calibration Concerns
Typically, when a meter is being calibrated, the voltage and
current circuits are separated as shown in Figure 25. This means
that current passes through only the phase or neutral circuit.
Figure 25 shows current being passed through the phase circuit.
This is the preferred option, because the ADE7760 starts billing
on the input V
1A
on power-up. The phase circuit CT is con-
nected to V
1A
in the diagram. Because there is no current in the
neutral circuit, the FAULT indicator comes on under these
conditions. However, this does not affect the accuracy of the
calibration and can be used as a means to test the functionality
of the fault detection.
Rev. 0 | Page 18 of 24
If the neutral circuit is chosen for the current circuit in the
arrangement shown in Figure 25, this may have implications for
the calibration accuracy. The ADE7760 powers up with the V
1A
input active as normal. However, because there is no current in
the phase circuit, the signal on V
1A
is zero. This causes a fault to
be flagged and the active input to be swapped to V
1B
(neutral).
The meter can be calibrated in this mode, but the phase and
neutral CTs might differ slightly. Because under no-fault condi-
tions all billing is carried out using the phase CT, the meter
should be calibrated using the phase circuit. Of course, both
phase and neutral circuits can be calibrated.
AGND
V
1B
V
1N
V
1A
R
F
R
F
C
F
C
F
CT
CT
RB
RB
0V
V
1A
IB
IB
P
N
*RB + VR = RF
VR*
RB*
RA*
V
2P
R
F
V
2N
C
T
C
F
V
TEST
CURRENT
240V RMS
0
Figure 25. Fault Conditions for Inactive Input Greater than Active Input
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相關(guān)代理商/技術(shù)參數(shù) |
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| ADE7761 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
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| ADE7761AARS-REF | 制造商:AD 制造商全稱:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
| ADE7761AARS-RL | 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP T/R |
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