The ability to sustain very high currents (Ith)
The most common requirements are :
Ability to sustain high short circuit currents (Icw et Ipk)
High quality connexions and splicing which insure maximum life time without maintenance
Connnexions and splicing without drilling which do not weaken the sections and faciliates maintenance and extensions
Type test documented by officials laboratories
Each conductor is sheath and isolated
Independant position in height
Shields at cells crossing
Extensions without drilling
High resistance to peak currents Ipk
Against arc propagation
Front access
Easy front access IR thermography
Calibers : 3 200 A <= Ith <= 7 800 A
Built in spcifically partitionned cabinets
Connections, extensions, splint without drilling
Busbar support withh built-in anti-arc barrier
Possible IR thermography with front access
Multi-coated mouting in parallel (sandwich)
in order to suppress differential f.c.e.m. induced by magnetic fields,
in order to limit mutual inductances.
Based on « C » shape profile
Very high moment of inertia
High resistance to flexion
Better cooling surface
Maximal usage of skin effect
Ith = 225, 700, 900, 1250, 2100A
Ue = 690V
Ui = 1000V diélectric 3500 V 1mn
Uimp = 12kV
Horizontal isolated busbar |
||
In (A) |
Ipk (kA) |
Icw(kA) |
320 |
47 |
4,9 |
540 |
59 |
7.1 |
720 |
68 |
11,6 |
950 |
97 |
40 |
1600 |
121 |
50 |
2200 |
143 |
85 |
2770 |
165 |
85 |
3200 |
220 |
100 |
4000 |
220 |
100 |
wxc *** Separated horizontal busbars |
||
In (A) |
Ipk (kA) |
Icw (kA) |
2700 |
105 |
50 |
4000 |
181 |
91 |
7100 |
276 |
120 |
7800 |
276 |
120 |
azer *** Vertical busbar (Icw given for 1 sec) |
||
In (A) |
Ipk (kA) |
Icw (kA) |
225 |
49 |
5 |
630 |
74 |
20 |
875 |
105 |
35 |
1 250 |
200 |
50 |
1900 |
200 |
100 |
Constant section for :
connections,
derivations,
splint.
Without maintenance