Cut Sheet

FLEXIBLE CONDUCTORS insulAted brAided ConduCtors
Spec-01138 D
EQUIPMENT PROTECTIONSUBJECT TO CHANGE WITHOUT NOTICEPOWER AND GROUNDING CONNECTIVITY11
INSULATED BRAIDED CONDUCTORS
INSULATED BRAIDED CONDUCTORS (IBS, IBSB AND IBSBR)
SPECIFICATIONS
Temperature rise of conductor = T2 - T1 = T (K)
Ex.: For a current of 630A, with:
T1 = 40 C (104 F) - T2 = 90 C (194 F)
1) T = 90 - 40 = 50K
2) In the 50 K column, find the closest current value to 630A.
K = Kelvin degree (temperature calculated, but not measurable.)
Insulated braided conductor in parallel
When using 2 or 3 insulated braided conductors in parallel for the
same phase, use the current coefficient:
Ex.: IBSB 100 - Tº = 50K: 385 A
2 braids in parallel > 385 A x 1,6 = 616 A
3 braids in parallel > 385 A x 2 = 770 A
Selection of insulated braided
conductor IBS, IBSB & IBSBR
according to the internal
temperature of the panel.
Internal
Temperature
of panel (T1)
Temperature of
conductors (T2)
Ambient Temperature
Insulated Braided
Conductor Type
Section
(sq-mm)
ΔT (K)
30
ΔT (K)
40
ΔT (K)
45
ΔT (K)
50
ΔT (K)
55
ΔT (K)
60
ΔT (K)
70
Current
Coefficient
2 Busbars
Current
Coefficient
3 Busbars
IBS 25 25 137 158 167 177 185 193 209 1,6 2
IBSB 25 25 116 134 142 150 157 164 177 1,6 2
IBS 50 50 213 246 260 274 288 301 325 1,6 2
IBSB 50 50 213 246 260 274 288 301 325 1,6 2
IBSB 70 70 226 261 277 291 306 319 345 1,6 2
IBSB 100 100 298 344 365 385 404 422 456 1,6 2
IBS 120 120 325 376 398 420 441 460 497 1,6
IBSBR 120 120 363 419 444 468 491 513 554 1,6 2
IBS 185 185 407 470 499 526 552 576 622 1,6
IBSBR 185 185 416 480 509 537 563 588 635 1,6 2
IBS 240 240 488 563 598 630 661 690 745 1,6
IBSBR 240 240 556 642 681 718 753 786 849 1,6 2
ADMISSIBLE CURRENTS: This table indicates the temperature rise produced by chosen current in the given section.
This calculation does not take into account the heat dissipation from the switch gear.