Siemens UL 1066, Operating Instructions Manual

Page: 300 / 334

23 – 18
Installing rear wall
(First remove supports for pole assemblies)
5 Screw tight of the bottom first, starting in the middle;

short screws on the bottom, long screws on the top.
Function test:
It must be possible to press the contacts completely together, and they must return independently to their original position. If this is not the
case, loosen the rear wall and check that the end position retaining springs are properly in place.
WARNING
Loss of overcurrent protection.
Pinching or crimping of the current sensor cable harness may result in loss of overcurrent protection.
Lay the cable harness carefully and do not pinch or crimp the wires.
WARNING
Reduction of current carrying capacity.
Incorrect assembly may result in a reduction of contact force, which may reduce the current carrying capabilities of the cir-
cuit breaker.
After re-assembling the circuit breaker housing, the contacts should be inspected to make sure that they are aligned and mobile.

This is accomplished by closing the circuit breaker, and observing the main contacts from above (looking down through the breaker's
arc chambers).
3
4
5
1
2 2
1 Insert end position retaining springs
2 Inspect to ensure that the coupling bolts are
centered
3 Attach rear wall
4 Insert connecting bars through the rear wall
6
Frame Size II:
18 Nm
Size
6 mm
Upper
12 Nm
Size
6 mm
Lower
Frame Size III:
25 Nm
Upper
18 Nm
Lower
13 ft-lb
13 ft-lb
18 ft-lb
9 ft-lb
Size
8 mm
Size
6 mm