Drawing

39
Time Current Curves TC01200002E
Effective March 2018
Series C
F-Frame
EATON www.eaton.com
Eaton Corporation January 2012
0.01
0.10
1.00
10.00
100.00
1000.00
10000.00
10 100 1000 10000 100000 1000000
Time in Seconds
Current in Amperes
ED, EHD, FDB FD, HFD, FDC 60A 2, 3 & 4 pole
Maximum
Tolerance
Minimum
Tolerance
Circuit Breaker time/current curves
Series C F-Frame Circuit Breakers
Catalog Types: ED, EHD, FDB, FD, HFD, FDC
for two, three and four pole breakers
For application and coordination purposes only.
Based on cold start at rated ambient temperature.
Connected with four (4) feet of rated wire (60/75°C) per terminal with
all poles wired in series. Tested in open air.
Instantaneous tripping is single pole.
Maximum Vac: 600V at 50/60Hz
Maximum Vdc: 250V
Breaker Rating
Continuous Amps Instantaneous trip amperes
60A See curve
May be 42% higher for dc voltages
Interruption Ratings (UL/CSA listed)
Breaker Symmetrical RMS amperes (kA)
Type 240 Vac 480Vac 600 Vac 250 Vdc 125 Vdc
ED 65 -- -- -- 10
EHD 18 14 -- 10 --
FDB 18 14 14 10 --
FD 65 35 18 10 --
HFD 100 65 25 22 --
FDC 200 100 35 22 --
Maximum Single Pole Trip
Times at 25°C
interruption rating and
application determines
end of curve
600V
480V
240V
Figure 36. Types ED, EHD, FDB, FD, FDC, and HFD 60A 2, 3 & 4 pole—Curve Number TC012044EN