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PDF PM9105AF Data sheet ( Hoja de datos )
| Número de pieza | PM9105AF | |
| Descripción | THREE PHASE POWER/ENERGY METERING MODULE PULSE OUTPUT | |
| Fabricantes | Sames | |
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SA9105 APPLICATION NOTE
PM9105AF
THREE PHASE POWER/ENERGY METERING MODULE
PULSE OUTPUT
FEATURES
n Performs one, two or three phase power n Uses current transformers for current
and energy measurement
sensing
n Meets the accuracy requirements for n Three pulse rate outputs available
Class 1 AC Watt hour meters
n Protected agianst ESD
n Operates over a wide Temperature
Range
DESCRIPTION
The SAMES three phase power/energy metering module, the PM9105AF provides three
pulse rate output options, the frequency of which are proportional to the active power
consumption.
Energy consumption can be determined by the power measurement being integrated
over time.
The method of calculation takes the power factor into account.
The output of this innovative universal three phase power/energy metering circuit is
ideally suited for energy calculations in applications using a µ-controller or mechanical
counter.
The application utilises the SAMES SA9105AF, SA9105EF or SA9105FF three phase
power metering integrated circuits for power measurement.
4310
PDS038-SA9105-001
Rev. B
1/10
13-09-95
1 page  
PM9105AF
The values of these resistors should be calculated as follows:
Phase 1:
R8 = R9 = (IL1/16µA) x R18/2
Phase 2:
R10 = R11 = (IL2/16µA) x R19/2
Phase 3:
R
12
=
R
13
=
(IL3/16µA)
x
R /2
20
Where ILX = Secondary CT current at rated conditions.
R , R and R =
18 19
20
Termination resistors of the three current transformers.
R1 + R1A, R4 and R15 set the current for the phase 1 voltage sense input. R2 + R2A,
R + P and R set the current for phase 2 and R + R , R + P and R set the current
55
16
3 3A 6 6
17
for Phase 3. The values should be selected so that the input currents into the voltage
sense inputs (virtual ground) is set to 14µA at nominal line voltage. Capacitors C1,
C2 and C3 are for decoupling and phase compensation.
R + P defines all on-chip bias and reference currents.
14 14
With
R
14
+
P
14
=
24kΩ,
optimum conditions are set. P may be varied within ± 10% for calibration purposes.
14
Any changes to R14 will affect the output quadratically (i.e: ∆R = +5%, ∆FOUT =
+10%).
XTAL is a colour burst TV crystal (f = 3.5795 MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897 MHz on-chip to supply the digital circuitry and
the A/D converters.
sames
5/10
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet PM9105AF.PDF ] | |
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