Application of IR Thermal imaging camera in electrical


1.Application of Thermal camera in leakage inspection

The insulation capacity of the wire or its bracket material is so poor that a small amount of current flows between the wires or between the wires and the earth, and the electric spark that leaks can become a source of ignition for the fire.

The Thermal camera can clearly see the hot spots, and can automatically track the hot spots to quickly find the place where the leakage occurs.

2.Application of infrared thermal imager in the field of electrical short circuit

On the electrical circuit, for various reasons, two points with different potentials are connected or collided, resulting in a sudden increase in current. Due to the large current in the short circuit, it is easy to generate strong electric sparks and arcs at the short circuit point, and the metal conductor of the wire has signs of melting and denuding defects.

This strong short circuit arc and molten high temperature metal can Causes combustion of combustible materials. By short-circuiting the current of the wire, the heat generated by the short-circuit circuit can be quickly burned due to the large amount of heat generated in a short period of time, and the combustible material near the wire can be burned, thereby causing a fire.

The infrared thermal imager can clearly see the hot spots and automatically track the hot spots to quickly find the short circuit .

3.Application in electrical overload inspection

The amount of current passing through the guide line exceeds the safe current value. Since the wire itself has a resistance, it will generate heat when passing current, and the larger the amount of current passing, the larger the heat generation, and the higher the temperature of the wire insulation layer.

Once the temperature of the insulated wire exceeds the maximum allowable operating temperature, the insulation of the wire will accelerate aging and even burn, causing a fire accident as shown below.

The infrared thermal imager can clearly see the hot spot and can automatically track Look for hot spots to quickly spot the overload.

4.Application of infrared thermal imager in checking excessive resistance

Where the connection of the power cord and the power cord are connected to the switch, the protection device, and the larger electrical equipment, the local resistance of the contact portion is excessive due to poor contact. When a large current is passed through the electrical circuit and the contact resistance is too large, extreme heat is generated in its local range, which can discolor or even melt the metal, and cause insulation of the electrical circuit, nearby combustibles and products.

The falling flammable dust caught fire and caused a fire. The infrared thermal imager can clearly see the hot spots and automatically track the hot spots to quickly find out where the resistance is too large.

5.Infrared thermal imager building electrical preventive

maintenance testing main application points:

Now our thermal imaging camera has been widely used in the following areas, greatly improving the work efficiency, the original problem that took a few days to check out, now 1- It can be checked in 2 hours. Transformer and distribution equipment; high and low voltage electrical lines; various electrical facilities; electrical switches, plugs, sockets, electrical components; electrical lighting and installations; central air conditioning electrical facilities, elevator electrical facilities; control appliances and protective electrical devices, grounding devices;


All objects that are not at absolute zero emit electromagnetic radiation of different wavelengths. The higher the temperature of the object, the more intense the thermal motion of the molecule or atom, the stronger the infrared radiation. The spectral distribution or wavelength of the radiation is related to the nature and temperature of the object. The amount that measures the amount of radiation of an object is called the emissivity. Objects with dark colors or darker surface colors have large emissivity and strong radiation; objects with bright colors or lighter surface have small emissivity and weak radiation.
The human eye can only see a very narrow wavelength of electromagnetic radiation, called the visible spectrum. For radiation with wavelengths below 0.4um or above 0.7um, the human eye can’t do anything about it. The wavelength of the infrared region in the electromagnetic spectrum is between 0.7um and 1mm, and the infrared radiation is not visible to the human eye.
Modern thermal imaging devices operate in the mid-infrared region (wavelength 3~5um) or far-infrared region (wavelength 8~12um). By detecting the infrared radiation emitted by the object, the thermal imager produces a real-time image that provides a thermal image of the scene. The invisible radiation image is transformed into a clear image that is visible to the human eye. The thermal imager is very sensitive and can detect temperature differences of less than 0.1 °C.
In operation, the thermal imager uses optics to focus the infrared energy emitted by objects in the scene onto the infrared detector, and then converts the infrared data from each detector element into a standard video format that can be used in standard video monitors. Displayed on the tape or recorded on the tape. Since the thermal imaging system detects heat rather than light, it can be used around the clock; and because it is completely passive, there is no light radiation or RF energy, so the user’s position is not exposed.


Here is a link for HT-18 Thermal camera video