Current intensity indicator DMA-3 CT TrueRMS

Current intensity indicator DMA-3 CT TrueRMS

DMA-3RMS-CT, 5902431676142

Product description

The DMA-3 CT is a 3-phase current intensity indicator, adapted for measurement in an indirect circuit using current transformers with an output current of 5 A.

The sensor correctly measures the true rms value of the current (TrueRMS), even in the case of a distorted (deformed) current waveform.
The indicator continuously measures the RMS current value, the result of which is shown on a 3-row, 3-digit segment display on the facade of the unit.
The indicator allows the value of connected current transformers to be set, so that the value shown on the display corresponds to the actual current value.
The DMA-3 CT is suitable for mounting in a switchgear directly on a 35 mm DIN rail.

If the secondary windings of the measuring transformers are open (e.g. during assembly) and a current flows through the measured circuit, a dangerous voltage may be induced at the terminals of the measuring transformer. It is absolutely necessary to protect oneself from such a situation by switching off the power supply of measured circuits or installing additional bridges short-circuitingthe secondary side of a measuring transformer.

The indicator is designed for current measurement using current transformers with a rated output current of 5 A. Current flow through the measuring circuit of the indicator of a value higher than 6 A may lead to damage of the indicator.

For increased safety, it is recommended that one side of the current transformer be earthed as shown in the connection diagram.

Typethree-phase amperemeter
Power supply voltage165÷265 V AC/DC
Measurementindirect (transformer 5 A)
Measured valueTrueRMS value AC current
Number of measurement channels3
Measurement range0÷5 A
Displayfor each phase 3-digit LED (height digit 10 mm)
Reading accuracymeasurement range up to 100 A: 0.1 A; measurement range above 100 A: 1 A
Power frequency45÷55 Hz
Accuracy of indications1%
Maximum instantaneous overload20 A/1 s
Maximum current6:00 AM
Terminal2.5 mm² screw terminals (cord); 4.0 mm² screw terminals (wire)
Tightening torque0,5 Nm
Power consumption4 W
Working temperature-25 ÷ 50 °C
Dimensions3 modules (52,5 mm)
Assemblyon rail 35 mm
Ingress Protection MarkingIP20