L2275
Emax UL
9/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
Fig. 16
Fig. 17
P
P
Possible widths of the connection busbars
Connection busbars
Continuous current rating
Number
Size mm / inches
E1
800 A
1
76,2/3"
6,35/0,26"
E1
1200 A
2
50,8/2"
6,35/0,26"
E2
1200 A
2
50,8/2"
6,35/0,26"
E2
1600 A
2
76,2/3"
6,35/0,26"
E3
1200 A
2
50,8/2"
6,35/0,26"
E3
1600 A
2
76,2/3"
6,35/0,26"
E3
2000 A
2
101,6/4"
6,35/0,26"
E3
2500 A
3
101,6/4"
6,35/0,26"
E4
3200 A
5
76,2/3"
6,35/0,26"
E4
3600 A
6
76,2/3"
6,35/0,26"
E6
4000 A
7
76,2/3"
6,35/0,26"
E6
5000 A
8
101,6/4"
6,35/0,26"
5.1.2
Examples of positioning the connection busbars according to the types of terminals
The connection busbars allow connection between the terminals of the power circuit breakers and the busbars of the switchgear. Their sizing
must be carefully studied by the switchgear designer.
Some examples of possible constructions in relation to the shape and size of the power circuit breaker terminals are given in this paragraph.
The various types of terminals are of constant dimensions per size of power circuit breaker: it is normally advisable to exploit the whole contact
surface of the terminal, so the width of the connection busbar should be the same as that of the terminal. Different capacities for the connections
can be made by working on the thickness and on the number of busbars in parallel. In some cases, reductions in the width of the connection in
relation to that of the terminal are allowed as shown in the following examples.
Positioning the first anchoring baffle of the busbars according to the short circuit current
Anchoring to the switchgear
VERTICAL TERMINALS
P
E1-E2
E3-E4-E6
(mm)
250
150
(inch)
9.84''
5.91''
HORIZONTAL TERMINALS
P
E1-E2
E3-E4-E6
(mm)
250
250
(inch)
9.84''
9.84''