Information Equipment Systems

μTURTLE-P Wireless Electricity Sensor


Installation Example

  • Battery-free
    Internal capacitors store energy needed for measurement and wireless communication (drawn from voltage input).
    Operates using voltage input as power source.
  • Supports single-phase and three-phase power
    Supports both single-phase and three-phase power.
    Three-phase power cable available.
    (Connect two units by a cable, for three-phase power measurement.)
  • Measures power level
    Measures aggregate power in addition to current, voltage, and power.
    Supports power measurement by load, for energy efficiency applications.
    (Unit is not a supply meter and is not usable for calculating utility bills.)

Parts and Dimensions

General Specifications

Item Specification Remarks
Input item Current/voltage
Measurement object1 Current, voltage, effective power, aggregate power, power factor
Rated current 50 – 500 A See below
Rated current 100 – 220 V
Frequency 50/60 MHz
Transmission interval 1 minute to 24 hours Limitations on interval, depending on number of units installed
Accuracy Current/voltage ±1.0% F. S. Sinusoidal input of commercial frequency
Power/power level ±2.0% F. S. Sinusoidal input of commercial frequency
Effective input range 10% – 100% F. S. Use voltage input
Power supply Self-powered 80 – 220 V
Transmission format 315 Mhz specified low-power radio
LED On when unit is operable
Operating temperature range -10 – 50 °C
Usable humidity range 80% RH Condensation-free
Required accessories Single-phase voltage input cable Used for single-phase power measurement
Three-phase voltage input cable Used for three-phase, three-wire power measurement
Three phase serial cable Used for three-phase, three-wire power measurement
Optional accessories PT Used for 400V input or above
Crest factor 2.2
Transmission unit dimensions 68mm(D)×50mm(W)×42mm(H) Excluding projections
Cable length (unit with separate CT) 2.5m/1.5m 2.5 m for 5 A only
Cable weight (unit with separate CT) 85g/50g 85 g for 5 A only

1 Measurement value is true effective value.

CT Inner Diameter
(mm)
Rated Current (A) Dimensions (mm) Unit with
integrated CT
Weight (g) Remarks
5 50 100 300 500
10 23(D)×39(W)×26(H) Unit with separate CT 220 Weight for a unit with separate CT
(including cables)
16 31(D)×45(W)×31(H) Unit with integrated CT/
Unit with separate CT
140 Weight for a unit with integrated CT
(excluding cables)
24 49(D)×64(W)×42(H) Unit with integrated CT/
Unit with separate CT
270 Weight for a unit with integrated CT
(excluding cables)
36 61(D)×80(W)×46(H) Unit with integrated CT/
Unit with separate CT
350 Weight for a unit with integrated CT
(excluding cables)

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