In the process of using silicone heating wire, there will be undesirable phenomena such as core breakdown, damage, and core breakage. Silicone heating wires are usually made up of a combination of core wires with a smaller cross-section. In the process of production, installation and use, it is easy to be affected by external forces and short circuits, resulting in the wire can not be used normally, so the next small series takes you to understand how to detect the short circuit of the silicone heating wire.
Silicone heating wire picture
First, how to detect when the silicone heating wire is short-circuited
1. The silica gel heating wire can be detected from the energized capacitance method, but this method is not recommended. The specific step is to determine the breakpoint by comparing the capacitance to continuously energize up. The temperature resistance of silicone heating wire is a little different from that of outsourcing materials. There are roughly three types of PTFE: PTFE (PTFE) non-stick coating can be used continuously at 260, the maximum use temperature is 290-300, the friction coefficient is extremely low, the wear resistance is good, and the chemical stability is excellent. The disadvantages of this method are very obvious. First, it's time-consuming. Second, the silicone heating wires that have already been formed, such as shielding, assembly and sheathing, are completed and it is difficult to find breakpoints.
2. The induction voltage method is to connect 650 volts AC voltage to one end of the broken core of the silicone heating wire, and the other side is grounded with other cores, and then test with an induction pen that can emit light signals (light). During the test, the signal changes when the sensor pen slides over the damaged core, so that the point of damage to the silicone heating wire can be accurately found. Silicone heating wire FEP: The FEP (fluorinated ethylene propylene copolymer) nonstick coating melts and flows during baking to form a non-porous film with excellent chemical stability and excellent non-stick properties at a maximum application temperature of 200.
3. The capacitance method and the induction method are used in combination, usually under the premise that the silicone heating wire is not shielded and sheathed for testing (inspection and testing). Silica gel heating line has excellent corrosion resistance, basically insoluble in any organic solvents, resistant to oil, strong acid, strong alkali, strong oxidant, etc. It has excellent electrical insulation performance, high voltage, low high frequency loss, no moisture absorption, and large insulation resistance. They offer excellent flame retardancy, aging resistance and long service life. The first use of capacitance test to find the approximate position, and then the use of the induced voltage method to accurately find the break point, this method is currently commonly used by silicone heating wire manufacturers.
4. The combination of constant current source and bridge method can be used to detect molded silica gel heating wire. The first use of constant current source to burn through the insulation at the broken core of the silicone heating wire, and then use the bridge fault locator to accurately locate the fault point, which is also a commonly used silica gel heating wire short circuit detection method.
The above explanation is the detection method of the short circuit of the silicone heating wire, I hope to read it can help you, if you want to know more about the relevant information of the silicone heating wire, welcome to inquire online, we provide you with the best quality service.