![]() The additional barrier provides shock protection even if the first barrier fails. Safety regulations require double or reinforced isolation that has a second isolation barrier for redundancy. This type of isolation separates the low-noise sensor circuits from the noisy remainder of the circuit. In a noise-reduction circuit, there are several isolation channels across the barrier, such as an ADC’s digital SPI communication lines. This four-channel capacitive isolation device can also work in a noise reduction strategy. The maximum surge isolation voltage (V IOSM ) per IEC6 equals 10kV. The thickness of the SiO 2 dielectric supports a maximum repetitive peak voltage (V IORM ) of 630V P, a maximum working voltage (V IOWM ) of 445V RMS, a maximum transient isolation voltage (V IOTM ) of 6000V P, and maximum isolation withstand voltage (V ISO ) of 3000V RMS. In Figure 2, this isolation barrier consists of a bottom plate, a SiO 2 dielectric, and a top plate. When breaking loops, a single channel or multiple channels straddle the interface of the circuit grounds ( Figure 2 ).įigure 2 A single isolation channel produces effective functional isolation. A perfect example of this is breaking ground loops with an isolation device. Functional isolation ensures that the circuit functions correctly. The first is called functional isolation. ![]() As they say, “Current, not voltage, kills.” Even a touch to a non-galvanic isolated circuit can harm equipment, circuits, and humans. ![]() Galvanic isolation is the prevention of unwanted AC currents that flow between functioning electric systems, sections, or humans, while still allowing signal and power transfers to occur. High-voltage systems that are around other equipment or humans require multiple levels of galvanic isolation. Both types of barriers protect system electronics and, most importantly, the people using the equipment.įigure 1 A handshake can go well or maybe not so well if the system lacks proper galvanic isolation protection. If the designers of the systems around you have selected devices that meet the international safety standards for two-barrier or reinforced isolation, you stand an excellent chance of being safe. If you’re a person that’s working in a dangerous, high voltage area, you might take a pause and think about whether you have the right electrical protection. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |