Francais

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  :

  • a 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

JDB-INF3000-1

JDB-INF3000-2

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

Busbar charactéristics

 

Horizontal isolated busbar
(Icw given for 1 sec)
(IN given for 35°)

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

Connections without drilling

 

Constant section for  :

  • connections,

  • derivations,

  • splint.

Without maintenance

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