GEI-86134, Power Circuit Breakers
16
600- 1600 A
300 -BOO A
Fig. 18.
SST phase sensor with tap board
100 - 300 A
X • Trip Rating
in Amperes
•Sensor Tap
Breaker
F rame
-
--
---
-
----
Size
Type
(Amperes)
(
Sensor
)
Ampere
Taps
100,150,225,300
AKR-30
800
- or-
300,400,600,800
300,400,600,800
AI{R-50
1600
-or-
600,800,1200,1600
800,1200,
AKRT-50
2000
1600,2000
CD
Pickup tolerance is ±. 9%
®
Pickup tolerance is±. 10%
Fig. 19. SST Neutral sensors
TABLE 4
SST TRIP CHARACTERISTICS
SST
PR OGRAMMER ADJUSTMENT RANGE (Set Points)
Long Time
Short Time
GROU ND FAULT
Instantaneous
Pick
CD
(•L)
Time
Pickup
Time
Pickup
Pickup
Time
Delay
®
Delay
®
®
Delay
(
Multiple
)
Band
@
(
Multiple
)
Band
@)
(
Multiple
) (
Multiple
)
Band
@
of X
(Seconds)
ofL
(Seconds)
ofL
of X
(Seconds)
3, 4, 5,
.4, .5, .6,
6,8,10 (L)
.8, 1.0,
1.2 (X)
Maximum
Maximum
Maximum
.6,
.7,
.8,
22
-or-
0.35
4, 5,6,
0.30
.9, 1.0,
Intermed.
Int .. rmed.
8, 10, 12 (L)
.25, .3,
.4,
Intermed.
1.1 (X)
10
1.75, 2,
0.21
.5, .6,
0.165
2.25, 2.5,
.7
(X)
Minimum
3,4 (L)
Minimum
Minimum
4
0.095
0.065
.2, .25, .3,
.4, .5,
.6 (X)
®
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 pages
28,
29 and 30 for applicable time-current curves)
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