Are gG fuses Motor rated?
As a first approximation – “gG” are general purpose fuses (i.e. normal ones) and “aM” are “motor” fuses (i.e. ones intended to withstand the startup surges from motors or other similar equipment) – typically providing a higher rated fusewire element within a lower rated cartridge (e.g. 20M25) and often only used to …
What is the breaking capacity of a BS88 fuse?
80kA
The standardised values of Breaking Capacity are 80kA for voltages of 415V a.c. and above, and 40kA for d.c. applications.
How is DC fuse rating calculated?
The fuse rating can be calculated by dividing the power used by the appliance by the voltage going into the appliance. I (Amps) = P (Watts) ÷ V (Voltage).
What is gG type fuse?
The most common operating class is gG (general purpose, formerly gL), but other classes are available. A gG class fuse will typically blow within 2–5 seconds at five times the rated current, and within 0.1–0.2 seconds at ten times the rated current.
How does a BS88 fuse work?
(Inside the BS88 fuse body is the fuse wire/wires which are surrounded by sand. The fuse clears the fault once the wire/wires are melted inside the sand). So the fuse is melted by energy which is the I2T number you are referencing.
What are BS88 2 fuses used for?
The fuse complies with standard EN 60269-2 section II and standard BS 88 part 2. This fuse range insures an excellent current limi- tation for all overloads on a large range of appli- cations. Their size cannot allow exchange by other fuses of higher rating in their range.
What type of fuse system is a bolted BS88 2 fuse?
HBC
I think most will know that a BS 88-2 fuse is a HBC, a high rating/breaking capacity for, sort of, industrial type applications.
What is a fuse rating?
Fuses come in standard ratings of 3 A, 5 A or 13 A. The best fuse to use in this example would be the 13A fuse. The 3A and 5A fuses would blow even when the fire was working normally.
What is the difference between gG and gL fuses?
gG and gL is the same thing where gL is an older definintion. The application cateogory is a two-digit code. The first letter is a if the fuse is for short-circuit protection only; an associated device must provide overload protection.
What is the current rating of cartridge fuse used for domestic wiring?
Cartridge fuses are cylindrical in shape and have contact points at each end. They are rated for circuits over 30 amps and typically 240 volts.
What are motor rated fuses?
Motor circuit protection fuse-links have a dual current rating, consisting of a continuous current rating and a rating relating to the operational characteristics. The letter ‘M’ separates these two ratings, for example, 20M32.
Is there a GG that is bs88-2?
So BS88-2 has nothing to do with gG. There can be a gG that is BS88-2 Currently we have BS 88 withdrawn on 30 Nov 2010 and replaced by BS HD 60269-2:2010…………which is DUAL NUMBERED as BS 88-2:2010. Let the wind blow you, across a big floor.
What’s the breaking capacity of a bs88 HRC fuse?
I have some questions regarding BS88 HRC fuses. According to the British Standard BS 88-1:2007; a “gG” class fuse at rated voltage of 550V ac (or 415V ac) has a breaking capacity of 80kA. How long will the fuse be able to withstand such an excessively high fault current?
What kind of Fuse is BS 88 Part 2?
As far as I understood it BS 88 Parts 2 or 6 is 80KA breaking capacity. BS 1361 type 2 is most common for domestic @ 33 KA. BS1361 type less common is 16.5 KA. I have come across all three in domestic installations. BS88 fuses can be and are used as main fuses in dom inst.
What’s the breaking capacity of A gG class fuse?
According to the British Standard BS 88-1:2007; a “gG” class fuse at rated voltage of 550V ac (or 415V ac) has a breaking capacity of 80kA. How long will the fuse be able to withstand such an excessively high fault current?