Current sensing is used to measure the flow of
electricity that passes through a point. Specifically, it measures how much
current is flowing in a wire. Commonly used for circuit protection and
controlling, it’s also intended for monitoring electricity and enhancing its
performance.
Current sensing can be done with the use of a
current sensor, a device that can detect and convert currents to a more
understandable and measurable output.
The two types of current sensing are direct and
indirect. Direct current sensing is used for a machine directly connected to a
circuit, which makes its line exposed to voltage. Indirect current sensing is
where there is isolation of the current from the voltage for safety measures.
Since there are two types of voltages─ direct
current and alternating current ─ there are also two types of sensors. The DC
current sensor measures the one-directional (forward) flow of a DC current
while the AC current sensor measures the reversing (backward and forward)
directional flow of an AC current.
DC sensors can be used in gauging batteries or machines
that connect with sockets and switches. The electric charges in a DC current
cannot travel long distances. AC sensors are mostly used to measure machines,
generators that cater to electric power with wide distributions like radio
signals.
Current sensing is often used for safety issues,
especially when regulating electricity usage. Understanding the current flow and
the measurement can tell the speed and direction of a motor, or monitor
currents to improve performance.
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