L2234
L2778
Emax
11/158
Doc. No.
Model
Apparatus
Scale
Page No.
1SDH000460R0002
5.1.2
Examples of positioning the connection busbars according to the types of terminals
The connection busbars enable the connection between the terminals of the 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 circuit-breaker
terminals are given in this paragraph. The various types of terminals are of constant dimensions for each size of circuit-breaker: it is normally advisable
to exploit the whole contact surface of the terminal, so the width of the connection busbars should be the same as that of the terminal. Different
connection capacities can be obtained by adjusting the thickness and number of busbars in parallel. In some cases, reductions in the width of
the connection in relation to that of the terminal are allowable as shown in the following examples.
Fig. 16
Positioning the first anchoring baffle of the busbars according to the short-circuit current
Anchoring to the switchgear
Fig. 17
FLAT
FRONT
VERTICAL
HORIZONTAL
P
E1-E2
E3-E4-E6
E1-E6
HORIZONTAL
250
150
–
VERTICAL
250
150
–
FRONT
–
–
250
FLAT
–
–
250
Vertical terminals
Horizontal and front terminals
Circuit-breaker
Iu [A]
Continuous current-
Busbar cross-section
Continuous current- Busbar cross-section
carrying capacity
carrying capacity
[A]
[mm
2
]
[A]
[mm
2
]
35 °C
45 °C
55 °C
35 °C
45 °C
55 °C
E1B/N 08
800
800
800
800
1x(60x10)
800
800
800
1x(60x10)
E1B/N 10
1000
1000
1000
1000
1x(80x10)
1000
1000
1000
2x(60x8)
E1B/N 12
1250
1250
1250
1250
1x(80x10)
1250
1250
1200
2x(60x8)
E1B/N 16
1600
1600
1600
1500
2x(60x10)
1550
1450
1350
2x(60x10)
E2S 08
800
800
800
800
1x(60x10)
800
800
800
1x(60x10)
E2N/S 10
1000
1000
1000
1000
1x(60x10)
1000
1000
1000
1x(60x10)
E2N/S 12
1250
1250
1250
1250
1x(60x10)
1250
1250
1250
1x(60x10)
E2B/N/S 16
1600
1600
1600
1600
2x(60x10)
1600
1600
1530
2x(60x10)
E2B/N/S 20
2000
2000
2000
1800
3x(60x10)
2000
2000
1750
3x(60x10)
E2L 12
1250
1250
1250
1250
1x(60x10)
1250
1250
1250
1x(60x10)
E2L 16
1600
1600
1600
1500
2x(60x10)
1600
1500
1400
2x(60x10)
E3H/V 08
800
800
800
800
1x(60x10)
800
800
800
1x(60x10)
E3S/H 10
1000
1000
1000
1000
1x(60x10)
1000
1000
1000
1x(60x10)
E3S/H/V 12
1250
1250
1250
1250
1x(60x10)
1250
1250
1250
1x(60x10)
E3S/H/V 16
1600
1600
1600
1600
1x(100x10)
1600
1600
1600
1x(100x10)
E3S/H/V 20
2000
2000
2000
2000
2x(100x10)
2000
2000
2000
2x(100x10)
E3N/S/H/V 25
2500
2500
2500
2500
2x(100x10)
2500
2450
2400
2x(100x10)
E3N/S/H/V 32
3200
3200
3100
2800
3x(100x10)
3000
2880
2650
3x(100x10)
E3L 20
2000
2000
2000
2000
2x(100x10)
2000
2000
1970
2x(100x10)
E3L 25
2500
2500
2390
2250
2x(100x10)
2375
2270
2100
2x(100x10)
E4H/V 32
3200
3200
3200
3200
3x(100x10)
3200
3150
3000
3x(100x10)
E4S/H/V 40
4000
4000
3980
3500
4x(100x10)
3600
3510
3150
6x(60x10)
E6V 32
3200
3200
3200
3200
3x(100x10)
3200
3200
3200
3x(100x10)
E6H/V 40
4000
4000
4000
4000
4x(100x10)
4000
4000
4000
4x(100x10)
E6H/V 50
5000
5000
4850
4600
6x(100x10)
4850
4510
4250
6x(100x10)
E6H/V 63
6300
6000
5700
5250
7x(100x10)
-
-
-
-