AIRPAX POWER PROTECTION CATALOG
●SENSATA'S PHILOSOPHY OF PROTECTION
■Reliable circuit protection is automatic protection which limits a fault to a single circuit. More importantly, it minimizes the danger of smoke and fire, not only in the equipment, but also in the conductors (or cables) leading to and from the equipment. Besides protecting the conductors, the protector must isolate the fault from the power source so that non-faulted circuits can continue functioning in a normal manner. These objectives may not always be achieved by a single protective device. To accomplish optimum protection, circuit designers must use the correct combination of devices, correct sizing of wire and safe routing to contribute to the overall circuit protection philosophy.
■The choice between circuit breakers, fuses, limiters or other protection means is governed by specifications, customer preference, maintenance, space, environmental restraints and circuit requirements. Proper selection procedures must result in a protective device with the lowest rating that will not open inadvertently. It must sense the fault, then disconnect the faulted line from the power distribution system before the wire insulation is destroyed. In addition, circuit breakers should almost always be trip-free, meaning that they cannot be held on against an overload. There are clear exceptions, such as in aircraft, when under certain conditions operation must be maintained in spite of overload. Besides considering all the variables involved, the time-current characteristics of the protective device should be compared with the time-current characteristics of the equipment (including starting or overload surges) component or wire.
■The entire electrical system, including the power source, wire (single or bundles), switching devices and equipment must be protected from faults. Generally, a circuit protector is used at any point in a circuit where the conductor size is reduced, unless the immediate upstream protector provides adequate protection for the smaller wire.
■Circuit components, such as transformers, rectifiers, filters, regulators and electronic circuits, have significantly different overload withstand characteristics from those of wire and cable. Many electronic circuits and components require extremely fast clearing devices, such as very fast acting fuses, to provide adequate protection from thermal damage.
- +1 Like
- Add to Favorites
Recommend
- Demoboard: Protected Automotive USB Outlet - Safe Charging of your Smartphone in Caravans and More
- ept One27® SMT PCB Connectors with a Pitch of 1.27mm is Suitable for Board-to-board Applications ∣ video
- The Installation Advantages, Structural Features and Product Applications of WAGO‘s 2273 Series Compact Wire Connectors ∣ Video
- RARA Would Like to Give Customers a “One-stop Solution” with All Kinds of Resistive Products
- Greenconn荣获邓白氏企业认证,实力彰显行业领先水平
- ELETE Press-fit With High Electrical Reliability, Suitable For Communications, Automotive Electronics, Medical And Other Industries
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.