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Introduction :
Shresta's
solutions for power metering have helped fuel the utility
industry's migration to solid state metering, while
simultaneously driving down costs and improving anti-tampering
capabilities. Our Solution offer the highest level of
integration and flexibility in the industry and are ideal for
developing low cost, intelligent utility meters for
residential and industrial applications.
Shresta's
advanced poly phase meter solution leverages the Single
Converter Technology and above capabilities along with a
21-bit 2nd order delta-sigma ADC and 6 analog inputs.
Poly-phase monitoring enables the collection of a much richer
set of information, beyond just how much electricity is used.
In addition to enabling an assessment of power efficiency,
which is important for industrial applications, poly-phase
also provides improved security to detect tampering and/or
power theft. Anti-tamper and time-of-use billings are both key
features that are derived from an integrated 'real time clock'
which enhances value while simultaneously saving on BOM costs.
Anti-tampering capabilities are becoming especially important
in developing countries, such as China and India, where power
usage and power theft are both growing rapidly.
Features :
- Compact Size (120mm x 120mm)
- Easy-to-use Windows Utility for calibration and
testing
- Easy programming via on board emulator Port
Specification :
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| Three Phase 4 Wire System & Three Phase 3 Wire System |
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| 240VAC x 3 (+20% and -40%) |
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| Current Rating |
| Power Factor |
| Power Consumption |
| Starting Current |
| Frequency |
| Voltage Withstand |
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| 5A (Ib) – 80A (Imax) |
| 0 to Unity (Lag & Lead) |
| Voltage Circuit:- 1W and 4VA |
| Current Circuit:- < 0.5VA |
| 0.4% of Ib (20mA) |
| 50Hz +/- 5% |
| 440VAC |
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- Power (3 LED)
- Pulse Active (KWH)
- Pulse Reactive (KVArH)
- Tamper
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Alpha Numeric LCD with
Backlight (Other LCD Option
available)
Normal Working :
On Push button :
- LCD check
- Date and Time
- Instantaneous Active Load in
Watt
- Active Cumulative Energy with
Decimal Digit
- Instantaneous Voltage
(Accuracy +/- 1%)
- Instantaneous Current
(Accuracy +/- 1%)
- Cumulative Active Energy (KWh)
for each Calendar month for
Previous Six Months
- Maximum Demand (KW MD) in a Calendar month for Previous Six
months with Date and Time
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| Optical Port for Meter Reading
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- Meter will record all Voltage and Current
related tampers including
Magnetic tampering
- Meter is capable of record energy in case
of phase sequence reversal
- Meter is capable of record energy if
Input/Output terminals are
interchanged
- The meter will record energy even if the
load current does not flow back
to the meter and instead current
is drawn through local earth
- Meter will record energy for balanced and
un-balanced load even if neutral
is removed
- CT bypass
- CT short
- CT reversal
- AC/DC Fields up to 0.2T, Permanent Magnet
of 0.5T. Meter to record max
value if tampered beyond 0.2
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- Last 20 events Magnetic
Tamper, if magnetic field on
meter is greater than 0.2 Tesla
- 8 Programmable Time Zones
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Separate
Battery with Pushbutton
arrangement to read Display
parameter during Power fail. |
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- RTC battery Status
- LCD Check
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- Real time & Date
- Instantaneous voltage
- Instantaneous Current
- Instantaneous Active load in watt
- Active Energy
- Maximum Demand with Date and Time
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Windows utility / HyperTerminal
for
- Customer ID
- RTC
- Material Serial Number
- MD intervals
- Billing Date and Maximum MD permitted
- Tamper Thresholds
- Tamper Counts
- Tamper Persistence Time
- Imax and Vmax parameters according to
CT/PT Ratios
- Scroll Rate
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| Voltage Circuit:-
1W and 4VA / Current Circuit:-
<0.5VA |
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| 0 to 55°C (32 to 131°F), 5 to
95%RH |
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| -20 to 85°C (-4 to 185°F), 5
to 95%RH |
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