For band setting Min CB, at the pick up setting 0.
70, the
commit time for the relay to pick up is approximately 10s
MULTIPLE OF LONG-TIME PICKUP
considering the actual pickup is 112% (0.784- actual pickup)of
10000
nominal pickup. We are not able to shift the curves to the left to
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.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90
1000 1000
900
800 show the exact pick up time as this is a pdf, but we can easily 900
800
700 700
600 see that it is approximately around 10s. 600
500 500
400 Clearing and Commit Times for X Multipliers of Nominal Pickup (RPXPU) for 400
300
GE PowerBreak, GE PowerBreak II, GE AKR, GE WavePro circuit breakers 300
and ANSI Trip Unit Conversion Kits.
X (nominal)= 1.5 1.5 6 6 7.2 7.2 10 10
200 200
Curve Commit Clear Commit Clear Commit Clear Commit Clear
CMIN 4.25 8.04 0.20 0.33 0.14 0.24 0.072 0.137
C2 12.7 24.1 0.60 0.94 0.42 0.66 0.21 0.35
100 C3 25.5 48.1 1.21 1.84 0.83 1.28 0.43 0.67 100
90 90
80 C4 34.0 64.1 1.61 2.45 1.11 1.70 0.57 0.89 80
70 C5 51.0 96.2 2.41 3.66 1.67 2.53 0.86 1.32 70
60 C6 67.9 128 3.21 4.87 2.22 3.37 1.15 1.75 60
TIME IN SECONDS
TIME IN SECONDS
50 C7 84.9 160 4.02 6.08 2.78 4.20 1.43 2.18 50
40 C8 102 192 4.82 7.29 3.33 5.03 1.72 2.61 40
MAX CB
C9 119 224 5.62 8.49 3.89 5.87 2.01 3.03
30 30
C10 136 256 6.43 9.70 4.44 6.70 2.29 3.46
C11 153 289 7.23 10.9 5.00 7.54 2.58 3.89
20 20
C12 170 321 8.04 12.1 5.56 8.37 2.87 4.32
C13 204 385 9.64 14.5 6.67 10.0 3.44 5.18
C14 238 449 11.2 17.0 7.78 11.7 4.01 6.04
C15 272 513 12.9 19.4 8.89 13.4 4.59 6.90
10 10
9 C16 306 577 14.5 21.8 10.0 15.0 5.16 7.76 9
8 8
7 C17 340 641 16.1 24.2 11.1 16.7 5.73 8.61 7
6 C18 374 705 17.7 26.6 12.2 18.4 6.30 9.47 6
5 CMAX 408 769 19.3 29.1 13.3 20.0 6.88 10.3 5
4 Algorithm will not commit below 1.5 cycles, clearing time will not be less than 0.085 seconds.
C-13 4
Actual Long-Time Pickup is 112% of Nominal (RPXPU) Pickup.
3 3
Curve represents a tolerance of -9% & +11% around the actual (RPXPUX1.12) value of current,
+ operating time.
2 GE time current curves include all required trip unit tolerance and CB operational variance. 2
C-6
Bottom/left of curve band is the “commit” time. Top/right is maximum clear time.
Curve will extend to ST PU, IOC PU or 15 x Nominal PU, whichever comes first.
1 1
.9 C-3 .9
.8 .8
.7 .7
DES-095B
DES-095B
.6 .6
.5 .5
.4 Transition to Short-Time Pickup, .4
MIN CB Short- Time Delay Band or Instantaneous
.3 Determines End of Curve .3
.2 .2
.1 .1
.09 .09
.08 .08
.07 .07
.06 .06
.05 .05
.04 .04
.03 .03
.02 .02
.01 .01
.5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 8090
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MULTIPLE OF LONG-TIME PICKUP
Low-Voltage Circuit Breakers DES-095B
Frames 800-5000A AKR & WavePro
Frames 800-4000A PowerBreak &
EntelliGuard TU Trip Unit for PowerBreak, Nominal Pickup Range
PowerBreak II PowerBreak II, AKR and WavePro 0.5X-1.0X Trip Rating Plug
Trip Unit 800-5000A Circuit Breakers
Conversions Kits
UL489 and UL1066 Stored Energy
Mechanism Circuit Breakers
ANSI Trip Conversion Kits
All Voltages: 600 Vac and below Long-Time CB Characteristics
Curves apply at 60 Hertz
and from -20°C to 55°C circuit breaker ambient temperature.
03.15
