How do you select a semiconductor fuse?
How do you select a semiconductor fuse?
Considerations
- Physical limitations on site or in the design.
- Braking capacity (kA)
- Fuse Class aR or gR/gS.
- Nominal current rating of fuse.
- Voltage rating of fuse.
- I²t Rating of Fuse.
- Range of ratings available in each package type.
- Fuse holder rating and size.
How do I calculate which fuse to use?
The simple calculation is watts divided by volts equals amps. After you have calculated this, it is a simple case of adding around 10% to the value and choosing the nearest fuse to match. This is a more precise method then just guessing should you require a 3, 5, or even 13 amp fuse.
What size fuse is required?
Plugs for appliances rated between about 700 watts and 3000 watts (the maximum rating of a wall socket) should be fitted with a 13-amp fuse (coloured brown). For example: 13A Fuse – Washing machine, dishwasher, microwave, kettle, toaster, iron.
What points are considered for selection of fuse material?
There are 11 critical factors involved in fuse selection:
- Normal operating current: A fuse’s current rating is typically derated 25% for operation at 25ºC to avoid nuisance blowing.
- Application voltage (AC or DC): The fuse’s voltage rating must be equal to or greater than the available circuit voltage.
What are high speed fuses?
High speed fuses are specially designed to minimize the I²t, peak current let-through and arc voltage. Ensuring fast opening and clearing of a fault requires rapid element melting. High speed fuses are primarily for protecting semiconductors from short-circuits.
What are the different fuse sizes?
Size groups
Blade size | Blade group | Common ratings (maximum current) |
---|---|---|
Micro3 | ATL | 5, 7.5, 10, 15 |
LP-Mini (low profile) | APS, ATT | 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30 |
Mini | APM, ATM | 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30 |
Regular | APR, ATC, ATO, ATS | 0.5, 1, 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30, 35, 40 |
What are the special features of fuse wire?
A. High melting point, high specific resistance.
Are there circuit breakers on the line side of a VFD?
Circuit Breakers on the “line side” of a VFD. NEC §430.52 and §430.53 resp. requires an MCCB (e.g. 140U-xx) or set of fuses for short-circuit protection on the line side of a VFD. An MPCB may be used in a single-motor-application provided it is tested and specified in the VFD’s instruction.
Which is the next generation high speed fuse?
The L75QS Series is a next generation High-Speed Fuse for the protection of power semiconductor devi… More A power semiconductor device is a high power electronic device that is used as a switch for control and conversion in electric power.
Which is the best semiconductor fuse solution provider?
Most sales worked in Bussmann, ABB, Eaton etc. Solution provider: Fuse,Breaker,Relay,Connectors. Original imported. Product quality is guaranteed, all products are original. Most Bussmann semiconductor fuse cost 10~30% lower than other Bussmann distributors.
What should the carrier frequency of a VFD be?
Since they include magnetic short circuit trip coils, the carrier frequency of the VFD should be selected as low as po ssible and must not exceed 4 kHz to avoid overheating. This is in agreement with recommendations given for line terminators and filters.