0611CT1603

Busbar Information

Plates for Mounting on Busbars

Determining the spacing between busbar supports (LA9ZX01495 and LA9ZX01485), according to IEC 60439-1.*

Short-circuit strength diagram according to UL845 (LA9ZX01508).

Load Resistance of Busbar Assemblies in IEC Applications

For an Ambient Temperature of 35°C and a Busbar Temperature of 65°C

Cross Section

mm
(in.)

12 x 5
(0.47 x 0.20)

15 x 5
(0.59 x 0.20)

20 x 5
(0.79 x 0.20)

25 x 5
(0.98 x 0.20)

30 x 5
(1.18 x 0.20)

12 x 10
(0.47 x 0.39)

20 x 10
(0.79 x 0.39)

30 x 10
(1.18 x 0.39)

Permissible current

A

200

250

320

400

450

360

520

630

In the event of changes in climatic conditions, the following curve indicates the correction factor K2 to be applied.

Example: In normal operating conditions, a tinned busbar of 30 x 10 can permanently withstand 630 A.

For a load of 800 A, the correction factor K2 to be applied will be 1.3 (800/630). As a result, the temperature rise in the busbars will reach 82.5°C.

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