Drawing
8
Time Current Curves TC01200002E
Effective March 2018
Series C
F-Frame
EATON www.eaton.com
.01
2
3
4
5
6
8
10
20
30
40
50
60
70
80
90
100
1000
900
800
700
600
500
400
300
200
.02
.03
.04
.05
.06
.07
.08
.09
.1
.2
.3
.4
.5
.6
.7
.8
.9
1
7
9
2000
3000
4000
5000
6000
7000
8000
9000
10000
ETUNIM1
SDNOCESNIEMIT
.1
.2 .3 .4
.5
.7
1.0
2.0
.1
.2 .3 .4
.5
.7
1.0
2.0
10%)
.4X
120ms
(K,N,Q)
300ms
(L,O,R)
Inst.
(J,M,P)
.3X
.2X
1X
.6X
.8X
I
n
Ground current in multiple of ( )
Ground fault pickup settings
(tolerance
Figure 5. Types FDE, HFDE, and FDCE 225A—LSIG—Curve Number TC01203017E
Digitrip 310+ Circuit breaker time/current curves (ground current)
Series C F-Frame Circuit Breakers
Catalog Types: FDE, HFDE, FDCE, industrail circuit breakers
Ground fault delay response
Notes:
1. Curve accuracy applies from –20C to +55C ambient. Temperatures above +85C cause an
overtemperature protection trip. For possible continuous ampere derating for ambient above 40C,
refer to Eaton.
2. Application frequency is 50/60 Hz.
3. Trip units are suitable for functional eld testing with test kit style # 70C1056G52.
4. For LD response and SD with at response curve, see: TC01203015E.
5. For LD response and SD with I
2
T response curve, see: TC01203016E.
4. For ground fault delay response (this curve): TC01203017E.
LSG
LSIG
(I
r
) / (I
n
)
80A 160A 225A
A
B
C
D
E
F
G
H
15A 60A 100A
20A 70A 110A
30A 80A 125A
40A 90A 150A
50A 100A 160A
60A 125A 175A
70A 150A 200A
80A 160A 225A
Switch
Setting
t
SD
t
GF
J
K
L
M
N
O
P
Q
R
Inst. Inst.
Inst. 120
Inst. 300
120 Inst.
120 120
120 300
300 Inst.
300 120
300 300