Why do you need a primary fuse in an amp?
The primary fuse is mainly there to prevent serious faults which may lead to overheating, fire or shock hazards; it doesn’t provide much protection for the components in the amp, even the power transformer.
How to choose the best motor protection fuse?
Fuse ratings selected from these columns coordinate with most UL Class 10 and 20 overload relays which covers over 90% of motor applications. 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.
What are the protection tables for Littelfuse fuses?
MOTOR PROTECTION TABLES TIME DELAY UL CLASS RK1 OR RK5 FUSE AMPERE RATING MOTOR RUNNING PROTECTION (USED WITHOUT PROPERLY SIZED OVERLOAD RELAYS) MOTOR FULL-LOAD AMPS BACK-UP MOTOR RUNNING PROTECTION (USED WITH PROPERLY SIZED OVERLOAD RELAYS) MOTOR FULL-LOAD AMPS MOTOR SERVICE FACTOR OF 1.15 OR GREATER OR WITH TEMP. RISE NOT OVER 40°C.
Why are fuses good for short circuit protection?
Fuses have proven themselves as particularly economical and reliable short-circuit protection equipment in motor circuits. Compared with other protection devices, fuses have considerably lower cut-off currents and values.
What kind of amplifier does Pete Millett use?
This simple single-ended amp project by Pete Millett is a great performer and a very well documented project that was immediately adopted by many DIY’er’s. The amplifier achieves good power output and low distortion by employing “E-linear” feedback in the output stage.
What happens when an amp goes into protection?
In MANY amplifiers, the power LED will be lit but the amplifier will be completely dead internally. This is especially true when the power supply has failed. There are a few amps (some JL Audio) that will go into protect and none of the indicators change.
Do you need to check the protection light on an amplifier?
The first thing you need to check is the on-board fuses plugged into the amplifier (if it has them). Not many amplifiers will illuminate the protection light when the fuses are blown but a few will so you need to check this.
What should I do if my amp fuses are blown?
Not many amplifiers will illuminate the protection light when the fuses are blown but a few will so you need to check this. If the fuse holders are melted, you need to have the amp checked by a technician to determine why they melted and to determine if the fuse holders are usable.