How to choose fuses for motor running protection?
Selecting Fuses for Motor Running Protection Based on Motor Actual Full Load Currents6 Better protection is achieved when fuse ratings are based on motor actual FLA obtained from motor nameplates. Locate motor nameplate FLA in the column appropriate for the type of motor and type of protection required.
Why did the fuse blow on my Tractor?
If the new fuse didn’t blow, an intermittent short caused the original blown fuse. An intermittent short can be difficult to find. Try wiggling each wire harness in the tractor back and forth and then repeat the test using the fuse. If you wiggle a harness and the fuse blows, then that harness contains a shorted wire.
Which is the correct fuse rating for overload relays?
If overload relays will provide principal motor running protection, select fuse ratings for correct type of motor from Motor Protection Table Columns headed, “Back-up Running Protection” or “With Overload Relays.”
When does the main breaker shut off the power?
The main breaker or main fuse does not shut off the power to the incoming service lines from the utility or the connections where those lines meet the main breaker or fuse inside the service panel. The lines remain live—carrying deadly levels of electrical current—unless the utility company shuts them off.
How often do you get a blown fuse?
Most people probably have experienced a blown fuse at one time or another. Someone always knows what to do when this happens. If you’re a homeowner, that person probably is you. Blown fuses are a common occurrence.
What kind of Fuse does a service panel have?
Older homes may have service panels with fuses instead of breakers. Fuse panels typically include one or more blocks that contain cartridge fuses. One of these blocks serves as the main fuse, or main disconnect, for the service panel. Each of the other blocks usually serves a 240-volt appliance, such as an electric range or a clothes dryer.
How can you tell when a fuse has been blown?
You might be wondering, then, how to tell if a fuse is blown–an actual fuse, that is. You will see that the fuse has melted, and there might be charring on the panel. A true fuse typically consists of a piece of metal, most commonly an encased wire, that actually melts when overheated. This is what stops the fault (aka “short” or “power surge” ).
Can a blown fuse be switched back on?
The breakers reset and can be “switched back on”–so there is no need to replace anything. Much of the time, it’s technically inaccurate to refer to a “blown fuse,” so in this article, we’ll offer you some new concepts and vocabulary to describe your various electrical concerns.