After using the heating tube for a long period of time, it needs to be replaced or repaired. However, the label on the heating tube voltage that must be known is already very vague. At this time, when looking for a manufacturer for non-standard custom processing, its working voltage or rated voltage is a necessary condition. At this time, we cannot rely on guessing to give an answer. , But to get the exact answer. So what should we do?
Under normal circumstances, the voltage and power will be marked on the surface of the heating tube.
(1) If the heating tube is a single-head electric heating tube, a U (unusual) heating tube, or a finned electric heating tube, if it is not marked, it is recommended that you measure the resistance value of the heating tube. According to P=U²/R, we can 220V and 380V are respectively substituted into the formula, and two powers are calculated. Then we can judge whether the voltage is 380V or 220V according to the working environment of the heating tube and the basic parameters of the tube (tube diameter, length).
(2) If it is a flange-type electric heating tube, we need to measure the resistance value of a single U-shaped tube, and then judge the voltage according to the wiring method of multiple U-shaped tubes, the working environment, and the basic parameters of the heating tube.
Due to the wide range of users who use heating tubes, not all of them understand the relevant electrician knowledge, so they often ignore or confuse the use voltage of two different voltage heating tubes. This is very dangerous and may easily lead to heating. Damage to the tube or even breakdown may cause a safety accident. Then take a single U-shaped heating tube as an example. Can a single U-shaped heating tube use single-phase electricity or three-phase electricity? Most people think that three-phase electricity requires at least three terminals.
In fact, a single heating tube can use 220V or 380V. Only the way of wiring is different. If it is a single-phase connection, directly a neutral wire and a live wire will do. If it is a three-phase connection, then 2 terminals can be connected to 2 live wires. After the customer purchases a flanged electric heating tube composed of a single U-shaped heating tube, if there is a change in the use voltage of the heating tube, you can refer to it
When it comes to the voltage and wiring of the heating tube, many customers may have more or less problems with this. Therefore, we need to be more sincere and understand how the heating tube should be wired correctly. This is directly related to the use and equipment of the heating tube. Damage and life issues.
Identifying the voltage of the heating tube and then connecting it correctly is not only a prerequisite for normal and stable operation in the equipment, but also a recognition of the manufacturer's products.
