Alta-3P-Current

Monnit Alta Wireless Three Phase 150 Amp AC Current Meters

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Models In Stock

For Measuring 3-Phase AC Current Up to 150A
Extended Non-Line-of-Sight Range (1,200 Ft Through 12-14 Walls Typical)
AES-128 CBC Data Encryption
Local Storage of 512 Messages for Data Assurance

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Alta-3P-Current

From ^C$ 1 330.11

Models In Stock

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1 Variations available

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Data Sheet

Product Overview

Accuracy ± 2 %
Accuracy Detail Current Transformer: ± 2% @ 2 to 150 Arms, ± 0.4 Arms @ < 15 Arms; Calibration Accuracy: Current Transformer: ±1% @ 2 to 150 Arms, ± 0.2 Arms @ < 2 Arms
Approvals CE, FCC, UL
Approvals Note FCC ID: ZTL- G2SC1 and IC: 9794A-G2SC1, UL Listed to UL508-4x specifications (File E194432)
Battery life up to 10 yr
Battery Size and Type Alkaline AA
Cable Length 3 ft
Calibration Calibrate at a current between 30% and 90% of max accurate range
Current Measurement Range 0 to 150 A
Data Interface Wireless
Electrical Connection Cable
Enclosure Ratings NEMA 4, NEMA Type 1, NEMA Type 12, NEMA Type 13, NEMA Type 2, NEMA Type 4X, Weatherproof
Form factor Wall Mount
Frequency 50 to 100 Hz
Height 2.559 in
Inner Diameter 0.94 in
Length 1.579 in
Current, Max 200 Amps RMS
Memory Upto 3200 sensor messages
Number of Channels 1
Number of Sensors 3
Operating Temperature, Max 85 °C
Operating Temperature, Min -40 °C
Operating Temperature Note -40°C to +85°C (board circuitry and battery)
Power Consumption 22.6 mA
Power Consumption Note Sleep Mode:0.2 µA, RTC Mode:0.7 µA, MCU Idle:570 µa, MCU Active:2.5 mA, Radio RX Mode:5.5 mA, Radio TX Mode:22.6 mA
Resolution Current Transformer: 1 Arms
Resolution Note Current Transformer: Average: 0.01 Arms, Max: 1 Arms, Min: 1 Arms, Duty: 1%, Amp Hours: 0.1 Amp Hours
Sensor Length 2.63 in
Sensor Thickness 1.65 in
Sensor Width 1.92 in
Series ID Alta-3P-Current
Supply Power Note DC: 2.0 - 3.8 VDC (3.0 - 3.8 VDC using power supply), Solar panel: 5VDC/30mA (53mm x 30mm), Charging temperature range: 0°C to 45°C (32°F to 113°F), Max temperature range: -20°C to 60°C (-4°F to 140°F), Included rechargeable battery: 600 mAh/>2000 charge cycles (80% of initial capacity), Solar efficiency: Optimized for high and low-light operation
Supply Power Type DC/Battery
Supply Voltage 2.0 to 3.8 Vdc
Weight 28.7 oz
Width 7.07 in

Supported Applications

The ALTA Industrial Wireless Three Phase Current Meter measures the RMS current of an alternating current (AC) system using three current transformers (CTs) that wrap around the conductors of a three-phase power system. It reports minimum, maximum, and average RMS current, duty cycle for each phase, and the combined amp hours of all three phases to the iMonnit system, making it ideal for energy monitoring, motor and pump load profiling, and predictive-maintenance programs across industrial facilities.

Because data is delivered wirelessly to iMonnit, the meter suits distributed installations where running signal cable is impractical. Readings are pushed on every heartbeat or immediately when current exceeds configured thresholds, so operators can trend consumption and catch abnormal load conditions in near real time.

Operating Conditions & Performance

The meter uses 0-150 amp current transducers, with an absolute maximum CT current of 200 Amps RMS (Arms) and a maximum accurate CT current of 150 Arms over a frequency range of 50-100 Hz. Accuracy is +/- 2% @ 2 to 150 Arms, +/- 0.4 Arms @ < 15 Arms, improving to +/- 1% @ 2 to 150 Arms, +/- 0.2 Arms @ < 2 Arms when calibrated with an appropriate offset. Offset limits run from -1.27 to + 1.27 Arms (default set to +0.3 Arms).

Measurement resolution is 0.01 Arms average, 1 Arms maximum and minimum, 1% duty, and 0.1 Amp Hours. The default averaging interval is 5 seconds. Each of the three current transformers ships with 3 ft wires and measures 67 mm x 49 mm x 42 mm (24 mm inner diameter).

The sensor operates over -40°C to +85°C (-40°F to +185°F) and runs on 2.0-3.8 VDC (3.0-3.8 VDC using power supply) from an included 1500 mAh battery. Integrated memory holds up to 3200 sensor messages and wireless range is 1,200+ ft non-line-of-sight, secured with Encrypt-RF® (256-bit key exchange and AES-128 CTR). The sealed, weatherproof enclosure is NEMA 1, 2, 4, 4x, 12 and 13 rated and weighs 28.7 ounces. Certifications include FCC, CE, Industry Canada, and UL Listed to UL508-4x specifications (File E194432).

Configuration Options

This series is offered as a single, fully featured three-phase configuration that bundles all three current transformers, wireless radio, and the complete measurement set — per-phase minimum, maximum, and average RMS current plus duty cycle and combined amp hours. There are no reduced-channel or scaled-down variants; every unit delivers the full 0-150 Arms three-phase capability described above.

Field capability can be extended with an optional solar feature comprising a 5VDC/30mA solar panel (53mm x 30mm) and a 600 mAh rechargeable battery rated for >2000 charge cycles. With the solar option, the charging temperature range is 0°C to 45°C (32°F to 113°F) and the maximum temperature range is -20°C to 60°C (-4°F to 140°F), supporting continuous unattended operation in remote locations.