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44 Maintenance
• Remove the bolts (a) that attach the lower fuse busbars (b) to the busbars of the DC
breaker switch. There are 6 bolts on the right and 6 on the left.
• Remove the bolts (c) that attach the the lower fuse busbars to the fuses from below.
• Pull out the lower fuse busbars.
6. Disconnect the cooling circuit of the DC breaker switch from the drive cooling system.
Drain the cooling circuit.
• Close the inlet stop valve (a) and outlet stop valve (b).
• Lead the drain hoses (c, on both side of the cubicle) into a suitable container.
• Open the drain valves (d, on both side of the cubicle) and drain the cooling circuit of
the DC breaker switch.
c
b
d
a
c
a
d
b
c
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