Power Circuit Breakers, GEI-86134
Breaker
Frame
Size
Type
(Amperes)
AKR-30
800
AKR-50
1600
AKRT-50
2000
Fig. 31. ECS current sensors on AKRU-4A-30
breaker
TABLES
ECS TRIP CHARACTERISTICS
X = Trip Rating
ECS PROGRAMMER ADJUSTMENT RANGE (Set Points)
in Amperes
=Sensor Rating
Long Time
Short Time
Instantaneous
(
Sensor
)
Pick
eD
(=L)
Time
Pickup
Time
Pickup
Ampere
Delay
®
Delay
®
Rating
(
Multiple
)
Band
@
(
Multiple
)
Band
@)
(
Multiple
)
of X
(Seconds)
ofL
(Seconds)
ofL
100,150,225,
3, 4, 5,
300,400,
6, 8, 10 (L)
600,800
Maximum
Maximum
22
0.35
-or-
300, 400, 600,
.6, .7, .8,
Intermed.
In termed.
4, 5, 6,
800,1200,1600
.9, 1.0,
10
1.75, 2,
0.21
8, 10, 12 (L)
1.1
(X)
Minimum
2.25, 2.5,
Minimum
4
3, 4 (L)
0.095
800, 1200,
1600,2000
CD
Pickup tolerance is±_
9%
®
Pickup tolerance is±_
10%
@
Time delay shown at
600%
of long time pickup setting
(6L),
at
lower limit of band.
@)
Time delay shown at lower limit of band.
(See page
27
for time-current curves)
25
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