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PowerPact H-, J-, and L-Frame Circuit Breakers
Installation Recommendations
150
02/2016 © 2011–2016 Schneider Electric
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Section 11—Installation Recommendations
Operating Conditions
Temperature Derating
•
PowerPact™ H-, J-, and L-frame circuit breakers may be used between -13°F and 158°F (-2°C and
+70°C). For temperatures higher than 104°F (40°C) inside the enclosure, devices must be derated.
•
Circuit breakers should be put into service under normal ambient, operating-temperature
conditions.
•
The permissible storage-temperature range for PowerPact H-, J-, and L-frame circuit breakers in
the original packing is -58°F
1
and 185°F (-50°C
1
and +85°C).
1
-40°F (-40°C) for Micrologic trip units with an LCD screen.
t
0
l
n
l
i
l
H-Frame Trip Curve
(l
n
) Fixed threshold thermal
protection against
overload
(l
i
) Fixed threshold
instantaneous protection
against short circuits
Table 136: Temperature Derating for H-Frame Trip Unit Thermal Protection—Long-Time
Temperature
1
1
Shaded areas indicate temperature rerated values, non-shaded areas inside an enclosure are standard circuit breaker ampere ratings
at 104°F (40°C).
Rating (A) I
n
°C °F
-10 14 23 30 38 46 53 60 68 76 88 103 112 123 137 160 180 221
0 32 21 28 36 43 49 56 63 71 83 97 107 117 131 151 171 207
10 50 20 26 33 40 46 52 59 66 77 90 101 111 126 141 161 194
20 68 18 24 31 37 42 48 54 62 72 84 96 105 120 132 152 180
30 86 17 22 28 34 39 44 50 56 66 77 88 98 110 121 139 165
40 104 15 20 25 30 35 40 45 50 60 70 80 90 100 110 125 150
50 122 12 17 21 25 30 34 38 43 53 62 72 80 86 95 109 131
60 140 9 14 17 20 24 28 31 35 46 53 63 70 72 80 93 111
t
0
l
n
l
m
l
J-Frame Trip Unit
(l
n
) Fixed threshold thermal
protection against
overload
(l
m
) Adjustable instantaneous
protection against short
circuits
Table 137: Temperature Derating for J-Frame Trip Unit Thermal Protection—Long-Time
Temperature
1
1
Shaded areas indicate temperature rerated values, non-shaded areas are standard circuit breaker ampere ratings at 104°F (40°C).
Rating (A) I
n
°C °F
-10 14 221 264 289 330 377
0 32 207 247 273 310 354
10 50 194 230 256 290 330
20 68 180 213 240 270 307
30 86 165 194 220 248 279
40 104 150 175 200 225 250
50 122 131 150 176 193 214
60 140 111 124 151 160 177