Electronic Current-Transducer Type STWA4MH

AC Electronic current transformer, AC 0 - 60 A, with interface RS485

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Product description

 

The STWA4MH measures alternating current up to 60 A. It has an RS485 interface (Modbus RTU). Multiple looping of the current-carrying conductor increases the sensitivity. For the detection of currents of any size, the STWA4MH is simply looped into the secondary circuit of a large current transformer with a secondary 5 A (pass the cable through the STWA4MH several times). Application The STWA4MH enables the space-saving and cost-effective measurement of the actual value of an alternating current. Compared to transducers with analog output, the bus technology considerably reduces the hardware (inputs) and wiring costs Applications are e.g. the recording of the current consumption of electric motors in processing machines. Another example is the monitoring of heating elements for failure.

 

Overview of Functions

  • Measuring of current AC 0-60 A (true RMS), resolution 50 mA
  • Interface RS 485 (Modbus RTU)
  • Addressable for up to 246 bus users
  • Baud rates 4800, 9600, 57600
  • Minimal wiring effort through bus
  • Connection via plug-in-spring-type terminals
  • Supply voltage DC 24 V (10...30 V)
  • Housing mount on 35 mm rail or screw fastening
  • Through current transformer (Ø 11 mm)

Technical Data

Supply Voltage Us

.......

DC 10 ... 30 V, max. 22 mA, typ . <13 mA

 

Measuring range

.......

AC 0 ... 60 A

 

Response time

.......

< 0,5 s.

 

Error (of scale, above 10%/Irated)

.......

≤ 2 % of FS

 

Temperature coefficient

.......

< 0,06%/K

 

Nominal frequency / operating range

.......

50/ 40...70 Hz

 

Error

.......

≤ 0,2%/Hz

 

Overload capacity cont./10s

.......

IN+20% /200 A

 

Testing voltage to supply voltage

.......

500 V

 

max. ambient temperature

.......

0...55°C

 

Housing

.......

Design H

 

Dimensions (h x w x d)

.......

50 x 36 x 56 mm

 

Diameter for conductor

.......

11 mm

 

Weight

.......

ca. 90 g


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Datasheet