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PDF SA4301A Data sheet ( Hoja de datos )
| Número de pieza | SA4301A | |
| Descripción | Polyphase Energy Metering IC | |
| Fabricantes | sames | |
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Polyphase Energy Metering IC with Pulse Outputs
and Anti-Tamper Features
SA4301A
ICDC - a division of
FEATURES
1 Meets the IEC62053, CBIP-88 and IS137799-1999
specification requirements for Class 1 AC static watt-
hour meters for active energy
1 Motor drive outputs (MOP, MON) provide average
active power information and can drive an electro-
mechanical counter or an impulse counter directly
1 LED pulse output for calibration purposes supplies
average active power information
1 Configurable for different meter ratings
1 Per phase energy direction indication
1 Per phase missing phase indication
1 Phase sequence error indication
1 Precision on-chip oscillator (70ppm/°C drift)
1 Precision on-chip voltage reference (10ppm/°C drift)
1 On-chip anti-creep function (0.005% of EMAX)
1 Low power consumption (<40mW typical)
1 Measures AC inputs only
DESCRIPTION
The SAMES SA4301A is an accurate polyphase
power/energy metering integrated circuit providing a single
chip solution for three phase energy meters. Very few
external components are required and the chip includes a
direct drive capability for electro-mechanical counters. The
SA4301A does not require an external crystal or voltage
reference. A precision oscillator and a precision voltage
reference to supply the circuitry with a stable frequency and
stable reference currents are integrated on the chip.
The SA4301A metering integrated circuit generates a pulse
output, the frequency of which is proportional to the active
power consumption.
Programmable inputs allow the meter manufacturer to
configure the SA4301A for different meter maximum
currents (IMAX) and nominal voltages (VNOM) without having
to change the stepper motor counter or impulse counter
gear ratio. The LED pulse output follows the average active
power consumption measured and is intended for meter
calibration purposes. In fast calibration mode this output
provides a high frequency pulse rate following the average
active power consumption and can be used for fast
calibration or to interface with a micro-controller.
The SA4301A includes an anti-creep feature preventing any
creep effects in the meter under no-load conditions.
The SA4301A integrated circuit is available in a 24-pin small
outline (SOIC24) RoHS compliant package option.
VDD
IIP1
IIN1
IVP1
IIP2
IIN2
IVP2
IIP3
IIN3
IVP3
AGND
CURRENT
CHANNEL 1
ADC
VOLTAGE
CHANNEL 1
ADC
DIGITAL
OUTPUT
DIGITAL
OUTPUT
SIGNAL PROCESSING
Instantaneous
power
LPF
Average
power
MAINS FAIL ENERGY
DETECTION DIRECTION
CURRENT
CHANNEL 2
ADC
VOLTAGE
CHANNEL 2
ADC
DIGITAL
OUTPUT
DIGITAL
OUTPUT
Instantaneous
power
LPF
Average
power
MAINS FAIL ENERGY
DETECTION DIRECTION
CURRENT
CHANNEL 3
ADC
VOLTAGE
CHANNEL 3
ADC
DIGITAL
OUTPUT
DIGITAL
OUTPUT
Instantaneous
power
LPF
Average
power
MAINS FAIL ENERGY
DETECTION DIRECTION
ANTI-CREEP
THRESHOLD
ABS
|X|
PROGRAMMABLE
ADDER
ANTI-CREEP
THRESHOLD
ABS
|X|
PULSE
GENERATION
ANTI-CREEP
THRESHOLD
ABS
|X|
VOLTAGE REFERENCE
AND
CURRENT BIASING
VREF
VSS
OSCILLATOR
AND
TIMING
Figure 1: Block diagram
POWER ON
RESET
TAMPER
CONDITION
AND
STATUS SIGNAL
DETERMINATION
OUTPUT
MULTIPLEXER
AND
DRIVER
PH/DIR
PH1
PH2
PH3
DIVISION
FOR
CALIBRATION
LED OUTPUT
LED
MODE
CHANNEL
PIN STATE
DETECTION
DIVISION
FOR
COUNTER OUTPUT
COUNTER
DRIVE
BUFFERS
MON
MOP
MS
RA
RB
FMS
SPEC-1538 (REV. 6)
1/23
21-02-2013
1 page  
SA4301A
ICDC – a division of
TERMINOLOGY
Anti-Creep Threshold
The anti-creep threshold is defined as the minimum energy
threshold below which no energy is registered and therefore
no pulses are generated on the LED or motor drive outputs.
Maximum Rated Mains Current (IMAX)
Maximum rated mains current is the specified maximum
current flowing through the energy meter at rated operating
conditions.
Positive Energy
Positive energy is defined when the phase difference
between the input signals IIP and IVP is less than 90
degrees (-90..90 degrees).
Negative Energy
Negative energy is defined when the phase difference
between the input signals IIP and IVP is greater than 90
degrees (90..270 degrees).
Percentage Error*
Percentage error is given by the following formula:
%Error = Energy registered by device - True Energy ×100
True Energy
NOTE: Since the true value cannot be determined, it is
approximated by a value with a stated uncertainty that can
be traced to standards agreed upon between manufacturer
and user or to national standards.
Constant*
Value expressing the relation between the active energy
registered by the meter and the corresponding value of the
test output. If this value is a number of pulses, the constant
should be either pulses per kilowatt-hour (imp/kWh) or watt-
hours per pulse (Wh/imp).
Nominal Mains Voltage (VNOM)
Nominal mains voltage (VNOM) is the voltage specified for
the energy meter at rated operating conditions.
Maximum Channel Energy (EMAX)
The maximum channel energy is defined as the energy
registered on one channel of the SA4301A when 16µARMS
input current with zero phase shift are applied to the voltage
and current inputs. Both the voltage and current inputs
saturate at an input current magnitude of 25µA, or at
17.68µARMS when using sine waves. The maximum input
current on each channel is therefore defined to be 16µARMS,
which leaves about 10% headroom to the saturation point.
Rated Operating Conditions*
Set of specified measuring ranges for performance
characteristics and specified operating ranges for influence
quantities, within which the variations or operating errors of
a meter are specified and determined.
Maximum Output Frequency (FMAX)
The maximum output frequency (FMAX) is the output
frequency in FAST mode when each of the three channels
measures an amount of energy equal to EMAX. The nominal
output frequency is 5kHz under such conditions.
Specified Measuring Range*
Set of values of a measured quantity for which the error of a
meter is intended to lie within specified limits.
Specified Operating Range*
A range of values of a single influence quantity, which forms
a part of the rated operating conditions.
Repeatability of Error Test**
This test shall be carried out at 0.05Ib and Ib at UPF load
under reference test conditions. Twenty error samples shall
be taken at time intervals of 30 minutes. Identical test
conditions shall be maintained throughout the test. For an
acceptance test six error tests may be carried out at time
intervals of at least 5 minutes.
Limit Range of Operation*
Extreme conditions which an operating meter can withstand
without damage and without degradation of its metrological
characteristics when it is subsequently operated under its
Total Sum
This represents the arithmetic sum of the active energy from
each channel taking energy flow direction into account.
Negative energy flow is effectively subtracted from the sum.
rated operating conditions.
Absolute Sum
This represents the arithmetic sum of the active energy from
each channel regardless of the direction of the energy flow.
The absolute values of the active energy recorded on each
individual channel are summed.
* IEC 62052-11, 2003. Electricity Metering Equipment (AC) – General Requirements, Test and Test Conditions
– Part 11: Metering Equipment
** IS13779-1999 Indian Standard AC Static Watt-hour Meters Class 1 and 2 Specification Rev 1
SPEC-1538 (REV. 6)
5/23
21-02-2013
5 Page 
SA4301A
ICDC – a division of
Table 3: LED and motor constants achievable for some common IMAX currents for VNOM = 220V to 240V
IMAX Dividing Factors LED Output Motor Output
IMAX Dividing Factors LED Output Motor Output
(A) DF_LED DF_MO (imp/kWh) (imp/kWh)
(A) DF_LED DF_MO (imp/kWh) (imp/kWh)
6 976
32
3200
100
30 392
16
1600
100
6 1952
16
1600
100
30 784
8
800
100
10 146
128
12800
100
30 392
8
1600
200
10 292
64
6400
100
30 784
4
800
200
10 584
32
3200
100
30 196
8
3200
400
10 1168
16
1600
100
30 392
4
1600
400
10 146
64
12800
200
40 146
32
3200
100
10 292
32
6400
200
40 292
16
1600
100
10 584
16
3200
200
40 584
8
800
100
10 1168
8
1600
200
40 1168
4
400
100
10 146
32
12800
400
40 146
16
3200
200
10 292
16
6400
400
40 292
8
1600
200
10 584
8
3200
400
40 584
4
800
200
10 1168
4
1600
400
40 1168
2
400
200
10 146
16
12800
800
50 234
16
1600
100
10 292
8
6400
800
50 468
8
800
100
10 584
4
3200
800
50 234
8
1600
200
10 1168
2
1600
800
50 468
4
800
200
20 146
64
6400
100
60 392
8
800
100
20 292
32
3200
100
60 784
4
400
100
20 584
16
1600
100
60 196
8
1600
200
20 1168
8
800
100
60 392
4
800
200
20 146
32
6400
200
80 146
16
1600
100
20 292
16
3200
200
80 292
8
800
100
20 584
8
1600
200
80 584
4
400
100
20 1168
4
800
200
80 1168
2
200
100
20 146
16
6400
400
100 234
8
800
100
20 292
8
3200
400
100 468
4
400
100
20 584
4
1600
400
120 196
8
800
100
20 1168
2
800
400
120 392
4
400
100
25 234
32
3200
100
150 156
8
800
100
25 468
16
1600
100
150 312
4
400
100
25 234
16
3200
200
25 468
8
1600
200
25 234
8
3200
400
25 468
4
1600
400
SPEC-1538 (REV. 6)
11/23
21-02-2013
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet SA4301A.PDF ] | |
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