Electrical Connections; Connections To The Power Circuit; Shapes Of The Terminals; Examples Of Positioning The Connection Busbars According To The Types Of Terminals - ABB Emax VF Installation And Service Instructions Manual

5.

Electrical connections

5.1. Connections to the power circuit

5.1.1.

Shapes of the terminals

Fixed circuit-breaker
HR
Horizontal rear terminals
Fig. 14
Note
The drawings are provided to show the type of terminal in graphic form. The exact shape of the terminals is given in the "Overall
dimensions" chapter.
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.
Circuit-breaker Iu [A]
E2N/VF 12 1200
E2N/VF 16 1600
E3H/VF 20 2000
E3H/VF 25 2500
Fig. 16
Positioning the first anchoring baffle of the busbars according to the short-circuit current
Anchoring to the switchgear
HORIZONTAL
Fig. 17
B2342
Model
VR
Vertical rear terminals
Vertical terminals
Continuous current-
carrying capacity
[A] (50÷60Hz)
35°C 45°C 55°C
1200 1200 1200
1600 1600 1600
2000 2000 2000
2500 2500 2500
VERTICAL
P
HORIZONTAL
VERTICAL
Fixed part for withdrawable circuit-breaker
HR
Horizontal rear terminals
Fig. 15
Busbar cross- Continuous current-
section carrying capacity
[mm ] [A](50÷60Hz)
2
35°C
1x(60x10) 1200
2x(60x10) 1600
2x(100x10) 2000
2x(100x10) 2500
E2
250
250
Apparatus
1SDH000909R0001
Doc. no.
Vertical rear terminals
Horizontal terminals
Busbar cross-
section
[mm
45°C 55°C
1200 1200 1x(60x10)
1600 1530 2x(60x10)
2000 2000 2x(100x10)
2450 2400 2x(100x10)
E3
150
150
Emax VF
VR
]
2
Scale
Page No
10/66