Design Guide for Hazardous / Industrial
Self-regulating trace heating systems
21-5400-7D0001/-
05/2023-EHT-466854
Notice Technical data subject to change without notice.
No claims for damage arising from alternations, errors or misprints shall be allowed.
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Table G2: Maximum heating circuit length at maximum ambient temperature of the enclosure
HSB+ trace heaters, Operating voltage: 230 Vac
+40°C
+55°C
Enclosure / trace heater
5HSB+2
10HSB+2
15HSB+2
20HSB+2
5HSB+2
10HSB+2
15HSB+2
20HSB+2
PBS/PBM
172
119
89
72
172
117
88
70
PBTC
170
113
85
68
117
78
59
47
PBTW
143
95
72
57
156
104
78
62
HTSB trace heaters, Operating voltage: 230 Vac
+40°C
+55°C
Enclosure /
trace heater
5HTSB2
10HTSB2
15HTSB2
20HTSB2
25HTSB2
30HTSB2
5HTSB2 10HTSB2
15HTSB2
20HTSB2
25HTSB2
30HTSB2
PBS/PBM
172
118
88
71
59
40
171
114
86
69
57
40
PBTC
168
112
84
67
56
40
114
76
57
46
38
34
PBTW
141
94
71
56
47
40
153
102
76
61
51
40
