Fuse Construction
A fuse designed to trip with no intentional delay
What is non-time-dealy
Fuses are rated in amps, interrupting rating and this
What is voltage?
True/False - All fuses of the same class irrespective of manufacturer must be identical in physical dimension.
What is true
This type of fuse is designed to provide an extra level of protection for specific equipment and is not permitted to provide feeder or branch-circuit overcurrent protection.
What is supplementary?
This device allows for the installation of fuses rated at lower values that the fuse holder is designed to accommodate
What is a fuse reducer?
Fuses dimensions have gotten this as a result of increasingly better fuse design, improved materials, and improved manufacturing processes.
What is smaller?
These types of fuse holders ensure that only current-limiting fuses are used for replacement purposes
What is rejection style?
Due to the relative ease of achieving selective coordination, fuses help prevent this
What are blackouts?
These types of fuses are used to provide protection for power electronic components, such as a power electronic drive for motor control.
What are high speed?
In general, fuses installed in applications over 150 Volts to ground are required to contain a disconnecting means located here.
What is on the supply side?
What is filler?
This type of legacy fuse does not provide current limitation and often has an interrupting rating of only 10 kA
What is type H?
A diagram used to determine the trip time of an overcurrent device where current is plotted on the x axis and time is on the y axis.
What is time-current curve?
Fuses designed for Photovoltaic applications follow this listing number
What is UL2579
A voltmeter connected across an energized fuse that is in good working condition should read this
What is 0 Volts?
Time delay fuses are constructed with two distinctly separate types of elements in this configuration
What is series?
Fuses typically have an interrupting rating of this or higher.
What is 200 kA?
What is oversizing?
These types of fuses come in two configurations, edison base and Type S which use a rejection adapter to limit fuses to the intended circuit ampacity
What are plug fuses?
In general, services with fuses larger than this are required to be equipped with fuses that clear in less than 0.07 seconds or be equipped with ARMS
What is 1200 Amps? - In Wisconsin, we remove this requirement and any ARMS system installed is on a voluntary basis
Cartridge fuses are secured mechanically in place using this type of clip
What are ferrule clips?
In general, a dual-element time-delay fuse with an ampere rating of 15 amps will hold an overload of 75 amperes for this long
What is 10 seconds? Fuses typically hold 5x their rating for up 10 seconds allowing motors to start without tripping
This fuse class known for its distinctive shape is sometimes referred to as "Charlie Chaplin" because the shape is reminiscent of his hat
What is CC?
These supplemental devices provide only short-circuit protection and are used to isolate fault conditions in services and feeders with at least 3 parallel conductors per phase
What are cable limiters?
This classification of fuses is often used in meter stacks, load centers, and for the protection of utility meters
What is Class T?