Precise and price-convenient measuring of AC current
With current transformers, you can measure AC current simply and with a sufficient accuracy, moreover with maintaining of a high safety level thanks to a galvanic isolation.
General purpose AC current measurment, overload and shortcut protection, load
drop or shutdown detection and similar application require simple and reliable
solution. Current transformers meet all these requirements and they add
further bonuses like galvanic isolation, no intervention to a measured circuit
and a convenient price.
Advantages / Features:
- simple measuring with a galvanic isolation
- high sensitivity
- no influence to a measured circuit
- long lifetime
- severe condition resistant
- price-convenient solution
As we know, one of AC current measurement methods is based on the usage of a
current transformer. Alternating magnetic field around a wire lead, which in a
continual proportion to a current flowing through a wire, will induce an AC
voltage in a measurement transformer. At a suitable construction and a right
transformer loading, is the output voltage in a continual proportion to a
current in a measured lead. Perhaps the biggest advantage of this method is
the fact, that a measuring circuit is galvanically isolated from a measured lead
and at the same time, the transformer doesn´t indtroduce any added load neither
any influence. If we´d like to go to a detail, the transformer consumes a
negligible amount of energy of few tens of mW/10A from a measured lead, which is
being lost in the winding and a load of the transformer.
Every current transformer is designed for a certain load, i.e. at a certain load
it provides most accurate results. For example for the type AC-1050 it is 100
Ohms. In such a case is valid a transfer ration 1000:1, i.e. to the load flows a
10 mA current at a 10A current in a measured lead. It means, that on a 100 Ohm
we will measure a voltage with a value of 1V. Output of a current transformer
can be connected to a panel meter, digital voltmeter, oscilloscope or an AD
converter input. By using an AD converter, it is also possible to monitor a
course of a current and to discover various nonlinearities in a power
Talema current transformers are top quality components with an outstanding
quality / price ratio. Transformers are designed for soldering into a PCB. In
our offer you can find more types, up to 100A maximum current. Currently we can
offer you type
AC 1050 also from the producer´s stock (ca. 8000 pcs)
with 1-2 weeks delivery time (standard delivery time uses to be 20 weeks).
Detailed information will provide you datasheets at given types.
201204206930.4.2012Test & measurementSOS electronic s.r.o.