Current intensity indicator DMA-3 TrueRMS
Current intensity indicator DMA-3 is used to continuous measurement the value of the current in a circuits of three-phases.
Functioning
* Measuring the effective value of current in electrical circuit.
* Measuring the circumference of the circuit is separated from the power indicator.
* Index marked TrueRMS fitted with a transducer gives the correct value of the effective value of current intensity at deformed runs.
Implementation
DMA indicators are intended for current transformers with a rated secondary current of 5A. The current range for these transformers is from 25 to 1000/5 A. The primary value of the transformer's current specifies the maximum measured current and the actual current value displayed by the indicator.
The DMA-20A and DMA-3 20A are intended for direct measurements (without transformers applied) within the range of 0÷20 A.
Order labeling method:
INDIRECT MEASUREMENT (with transformers applied)
DMA- X Y /5A Z
X Three-phase: 3 |
Y Primary value of the transformer's current : 25, 30, 40, 50, 70, 75, 80, 100, 120, 125, 150, 160, 200, 250, 300, 400, 500, 600, 700, 750, 800, 900, 1000. |
Z True RMS |
Example:
*DMA-3150/5 A TrueRMS a three-phase for 3×150/5A transformers, measurement range at 3 ×0÷150 A, incl. TrueRMS.
DIRECT MEASUREMENT (without transformers)
DMA- X 20A Z
X Three-phases: 3 |
Z True RMS |
Example:
* DMA-3 20A TrueRMS - three-phase devicefor 20A, measurement range 3×0÷20A, with TrueRMS
- Type
- three-phase amperemeter
- Power supply voltage
- 100÷265 V AC
- Display
- for each phase 3-digit LED (height digit 10 mm)
- Display range - direct measurement version
- 0 ÷ 20 A
- Range of indications - intermediate measurement version
- 0 ÷primary current of the transformer
- Accuracy of indications
- 1%
- Maximum instantaneous overload
- 40 A (maximum to 1s)
- Maximum current - direct measurement version
- 20 A
- Maximum current - intermediate measurement version
- 5:00 AM
- Terminal
- pluggable terminal blocks 4,0 mm²
- Tightening torque
- 0,5 Nm
- Power consumption
- 4 W
- Working temperature
- -20÷50°C
- Dimensions
- 3 modules (52,5 mm)
- Assembly
- on rail 35 mm
- Ingress Protection Marking
- IP20
Current transformer implementation