CQ209D

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Current transducers are electrical components used to measure and monitor a variety of current measurements. The regulated current flows through them, and the output from the transducer reflects the current flowing through it.The CQ209D current transducer is among the most commonly used current transducers, designed for the accurate measurement of both direct and alternating current.

Application Field

The CQ209D current transducer has a wide range of uses in industrial, domestic and electrical engineering applications, ranging from hot water monitoring systems to electric fencing of properties.

Handheld current measuring devices such as clamp meters use the CQ209D current transducer to precisely measure the current flowing through a single wire. Industrial applications such as power cord monitoring, high voltage fault alarms, motor control current sensing and cable fault location can benefit from the CQ209D current transducer. In addition, the transducer is used in high current monitoring systems such as in the automotive industry and the power electronics industry.

Working Principle

The CQ209D current transducer operates on the principle of current-to-voltage conversion. It can be configured to measure both direct current (DC) and alternating current (AC). In a DC application, current flows through the transducer winding, generating a magnetic field which creates a back-electromotive force or back-voltage (BEMF). This BEMF is converted into an output voltage proportional to the measured current in the winding. In an AC application, the time-varying current in the winding generates a back-voltage that is proportional to the current variation.

The CQ209D current transducer is composed of a primary winding and a secondary winding. The primary winding is connected in series with the line through which the current is measured, and the secondary winding is connected to the output circuit. When current flows through the primary winding, it induces an electric current in the secondary winding, which produces an output voltage proportional to the current in the primary winding. The output voltage is proportional to the ratio of the number of turns in the secondary winding to the number of turns in the primary winding.

The CQ209D current transducer has two main advantages. First, it provides an accurate measurement of the current, and second, it eliminates the need for direct contact with the line, thus avoiding any safety hazards. The CQ209D current transducer is also relatively small, making it easy to install and use in a variety of applications.

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