Current intensity indicator DMA-1

Current intensity indicator DMA-1

DMA-1

Digital. One phase indicator.
Current intensity indicator DMA-1 is used to continuous measurement the value of the current in a circuits of single-phase.

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 0Ă·20 A.
 

Order labeling method:

INDIRECT MEASUREMENT (with transformers applied)

DMA- X  Y /5A

X
One phase: 1



 

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-150/5A  a one-phase device for 50/5A transformer, measurement range at 0Ă·50A, no TrueRMS;


DIRECT MEASUREMENT (without transformers)


X
One phase: 1
 
Z 
True RMS
 





Example
  * DMA-1 20A - one-phase device for  20A, measurement range 0Ă·20A, without TrueRMS
  * DMA-1 20A TrueRMS - one-phase device for 20A, measurement range  3Ă—0Ă·20A, with TrueRMS

Typesingle-phase ammeter
Power supply voltage100Ă·265 V AC
display3-digit LED (height digits 10 mm)
Power frequency45Ă·55 Hz
Display range - direct measurement version0 Ă· 20 A
Range of indications - intermediate measurement version0 Ă·primary current of the transformer
Accuracy of indications1%
Maximum instantaneous overload40 A (maximum to 1s)
Maximum current - direct measurement version20 A
Maximum current - intermediate measurement version5:00 AM
terminalscrew terminals 4,0 mm²
Tightening torque0,5 Nm
Power consumption4 W
Working temperature-25 ÷ 50 °C
dimensions3 modules (52,5 mm)
Assemblyon rail 35 mm
Level of securityIP20

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