Busbar

The busbar system is the most important part of a switchboard

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
  

Busbar below 3200 A

• 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

Busbar above  3200 A

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.

Vertical busbar

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