This type of fuse is not designed to withstand temporary overload currents associated… A fuse's main purpose is to quickly disconnect a short circuit from the distribution system. Problem is I don't know. The numbers 3 and 13 refer to the current rating of the fuse and define the nominal current that the fuse will carry indefinitely without operating blowing. The fuse has a metal point that melts or breaks when the set number of amps is exceeded. Fuses are old technology and circuit breakers are new technology and can incorporate such… Isolators are non-load breaking devices -in other words, they are not designed to break or make close onto load currents. But that's not the issue. To find out more about the cookies we use, see our.
Logged Yes, amps are amps. Fuses are designed to protect over-current, not over-voltage. Fuses have voltage ratings because, when a fuse blows, the full supply voltage can appear across the fuse itself. Will the new fuses be safe to use? The glass will be clear, no burnt look to it and you can sometimes see the broken filament in there. Use of any linked web site provided in a product review or post is at the user's own risk. The… A circuit breaker is something you can reset.
These cookies allow our website, applications and services to remember choices you make such as your preferred language and provide enhanced, more personal features. If the input voltage drops too low then the regulator drops out and the load voltage decreases. Fuses and circuit breakers are both overcurrent protection devices, which will disconnect a circuit in the event of a prolonged overload current or in response to a short circuit. It is always a bad idea to use a fuse bigger than you need, because if… Both circuit breakers and fuses are safety devices meant to prevent catastrophic damage when there is an overcurrent condition in an electrical circuit. Fuse: When the current passing through a fuse exceeds its rated value it… The voltage rating of a fuse in this case 125V or 230V defines the maximum circuit voltage that the fuse is safe to be used on. Suggestions are welcomed, please contact us! There are several differences between… A relay is a switch; it is not usually meant to open under fault conditions high current , and would likely fail if done so.
I work in building controls and a few years back all of the fuses we use for our 24V control circuits went from being stamped 32V to being stamped 250V. You can replace a 125V fuse with a 250V fuse of equal amperage as long as the application voltage is 250V or less. The 12 volt output fuse blew, not the input fuse. Cookies are required for our site. In general, fast-acting fuses are a single strand of wire or strip of metal.
Therefore as long as the fuse amperage is sized appropriately and as long as your fuse voltage meets or exceeds your application voltage the fuse will safely protect. I took apart the 12 volt charger that fits into the car cigarette lighter or 12 volt receptacle, it had a blown 2amp fuse. There are also protective relays, which are devices that sense fault, or other undesireable conditions, and are used to send trip commands to breakers. Because Littelfuse respects your right to privacy, you can choose to modify the cookies option and disallow some of them. Lamp Load for testing equipment For the service person who wants to test something without blowing fuses I suggest you use the Lamp Test Fixture as shown below. Its speed of operation is based on the inverse-time characteristic of the melting process -i. Fuse Types There are two basic types of fuses available for appliances and consumer electronics: fast-acting or time-delay.
Thus is the way of all regulated supplies. It's common for a regulated supply to blow an input fuse when fed low voltage. A circuit breaker has a twofold function: it trips on a short circuit by utilizing a magnetic sensor device and it also trips on a thermal device which senses a current overload that is higher than its rated current. Any statements posted constitute the statements of the poster and are not the statements of Grainger. Shipping usually takes between 2-5 days, it depends on your location. The information these cookies collect may be anonymized and they cannot track your browsing activity on other websites.
Regulated power supplies make up for the low input voltage by ramping up the input current. Maybe it'll never blow again. These fuses are used to protect electronic circuits and components. Fatigue can happen due to the slight amount of mechanical flexing that the little fuse wire undergoes each time the power is turned on, eventually causing a mechanical failure of the fuse wire. They are normally opened after the circuit has been disconnected by a load-breaking device, such as a circuit breaker, and closed before the circuit is re-energised.
At this point I don't have a clue. Have you determined the cause? Linear regulators disipate the excess power as heat so if the input voltage sags it just disipates less heat while delivering the same power to the load. We may also collect personal data such as your name, job title, company name, address, email address and telephone number either directly from you or by combining information we collect through other sources. We have had no issues - just get the amps right and you should be fine. What kind of current were you drawing to blow a 7 amp fuse? They may also be used to provide services you have asked for. Electronics from vehicle computers to home stereos use different types of fuses to protect the equipment. They are also used to limit the number of times you see an advertisement as well as help measure the effectiveness of an advertising campaign.