Below is a time current curve (TCC), showing the damage curve of a transformer. Draw (roughly), where we would want a fuse curve to be to protect the transformer

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D3 . Below is a time current curve (TCC), showing the damage curve of a transformer. Draw (roughly), where we would want a fuse curve to be to protect the transformer
CURRENT IN AMPERES
10000
TIME SCALE ABOVE 100O SECO NDS
TYP ICALLY NOT SHOWN)
1000
FLA
100
SECO NDA RY-SIDE
THERMAL LIMITCURVE
PRIMARY-SIDE
THERMAL LIMITCURVE
SECO NDA RY-SIDE
10
PRIMARY-SIDE
MECHANICAL DAMAG ECURVE
MEC HANICAL DAMAGE CCURVE
(TYP ICALLY NOT SHO WN)
1
INRUSH
12 x FLA @ O.1 SECONDS
0.10
NOTES:
1.ALL LAND MARKS ARE BASED
ON THE NOMINAL KVA RATING.
2. LANDMARKSARE BASED ONA
D-YG CO NNECTED UNIT.
INRUSH
25 x FLA @ 001SECO NDS
TYPICALLY NOTSHOWN)
|||||||
0.01
0.5 1
10
100
1K
10K
Example 1.tcc Ref. Voltage: 4160 Current Scale x10^1
TIME IN SECONDS
Transcribed Image Text:CURRENT IN AMPERES 10000 TIME SCALE ABOVE 100O SECO NDS TYP ICALLY NOT SHOWN) 1000 FLA 100 SECO NDA RY-SIDE THERMAL LIMITCURVE PRIMARY-SIDE THERMAL LIMITCURVE SECO NDA RY-SIDE 10 PRIMARY-SIDE MECHANICAL DAMAG ECURVE MEC HANICAL DAMAGE CCURVE (TYP ICALLY NOT SHO WN) 1 INRUSH 12 x FLA @ O.1 SECONDS 0.10 NOTES: 1.ALL LAND MARKS ARE BASED ON THE NOMINAL KVA RATING. 2. LANDMARKSARE BASED ONA D-YG CO NNECTED UNIT. INRUSH 25 x FLA @ 001SECO NDS TYPICALLY NOTSHOWN) ||||||| 0.01 0.5 1 10 100 1K 10K Example 1.tcc Ref. Voltage: 4160 Current Scale x10^1 TIME IN SECONDS
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