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The Sharing of the Experience of Using the Power Sensor for Novices

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Update time : 2021-07-30 08:02:28
Power sensors are mainly suitable for automatic control and remote control fields to realize real-time online data monitoring. It is a detection device that can feel the information of the measured electricity, and can transform the detected and felt information into electrical signals or other required forms of information output according to a certain rule, so as to meet the needs of information transmission, processing, storage, display, record and control requirements. If you want to use the device to achieve the expected results, there are some environmental requirements that need to be paid attention to when using it. Let's talk about it in detail below.
Environmental requirements for the use of power sensors:

The use environment of the sensor should be free of conductive dust, metal corrosive and insulating gas. Otherwise, a secondary circuit will occur due to conductive dust and objects, or a short circuit between the secondary side power supply and the signal will burn out the sensor.
1. Ambient temperature

The sensor’s specifications will provide the normal working ambient temperature range of the sensor, such as -40 to 85 degrees, depending on the product model. It is recommended not to exceed the temperature range stated in the specification, beyond the normal operating temperature range of the sensor, some internal components will degrade performance due to temperature characteristics, reduce accuracy, output signal inaccuracy, or fail to work, etc.
The sensor should be installed as far as possible in a place with good ventilation and heat dissipation, so as not to affect the measurement accuracy and life of the sensor due to high temperature.
2. Altitude

Usually, the sensor design will consider the altitude, and it is usually 2000 meters. However, it is not only suitable for altitudes below 2000 meters. If the altitude exceeds 2000 meters in actual use, it will mainly affect the heat dissipation and insulation performance of the sensor. It will reduce the insulation characteristics. Although the insulation can also be improved by external means, it is difficult to implement and will increase the costs. In the actual selection and use, you can refer to the IEC 60664-1 for derating. For details, see IEC 60664-1 Section 5.1.4, derating factor in Table A.2. The heat dissipation problem can be solved relatively easily by means such as forced air cooling.
3. Installation location

Since the power sensor is a non-contact measurement, it mostly detects the magnetic field around the charged conductor, so it is not suitable to have a strong magnetic field near the sensor, and a device that is prone to generate a magnetic field. Including transformers, reactors and conductors that flow large currents, etc. Especially in the three-phase test, adjacent sensors should not be installed too close. Where space permits, the spacing should be as large as possible.
Sometimes limited by the cabinet and its internal layout, it is difficult to leave enough space. In this case, it is recommended that the sensor should stagger the installation, especially for the HALL sensor. You’d better keep the location of the HALL device away from the magnetic field source as much as possible.
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