ABB Power Distribution 57
Figure 6/20: Testing and earthing module with:
– Actuating bars, removable:
• top position for bottom shutter
• bottom position for top shutter
– Contact arm, removable:
• bottom position for cable area
• top position for busbar area
– Insulating plate, with alternating installation positions
for cable or busbar earthing (for busbar earthing turn
by 180°)
– Contact systems, exchangeable for different
switchgear contact pin diameters
– Ball handle, removable, for voltage tests
– Short-circuit bridge, exchangeable for ball handles
Figure 6/21: Fitting of the horizontal partition with additional
ventilation for circuit-breakers due to increased
ambient temperatures according to section 1.3.
The internal flap is shown in the service position
(open!). Side view, but without the wind vane with
microswitch required with a fan
20 Horizontal partition, fitted here with additional
ventilation facilities for the circuit-breaker
20.3 Flap
20.4 Leaf spring
20.5 Inspection opening
20.6 Bracket
20.7 Centrifugal fan
Figure 6/22: Horizontal partition with additional ventilation facilities
checking of unimpedeed motion of the internal flap 20.3
20.5 Inspection opening
20.7
142 Testing and earthing module with manual operation
142.1 Actuating bar (1 pair)
142.2 Contact arm (3 pieces)
142.3 Contact system
142.4 Ball handle (3 pieces)
142.5 Insulating plate with 3 removable bushings
142.6 Bushing
142.7 Contact pin
142.8 Short-circuit bridge, complete
20.5
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