Siemens SION - Page 56

Installation
56 9229 0025 176 0E
2021-11-15
Mounting contact arms with Ø 40 mm and contact systems
• Place the contact arms (22) on the threaded rod (22.1).
• If available, mount insulating shells (see “Mounting the system-side insulating
shells”, page 43).
• For contact arms (at rated normal current I
r
≤ 1250 A) with Ø 40 mm, insert con-
tact arm adapter (22.2) in contact system (23):
- Grease contact fingers (23.1) in the contact system (23) with Molykote
Longterm 2 (see 1.)
- On the rear of the contact system (23), adjust the contact arm adapter (22.2)
with screw, washers and nut (see 2.)
- Tighten the screw and nut with an open-ended spanner in the contact sys-
tem (see 3.)
- Remove screw with washers and nut (see 4.)
Fig. 86 Attaching contact arms – example with
Ø40mm
Fig. 87 Inserting contact arm adapter on the back –
example for contact arms with Ø 40 mm
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22
22.1
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23
23.1
22.2
1.
2.
3.
4.
22 Contact arm 23 Contact system
22.1 Threaded rod 23.1 Contact finger
22.2 Contact arm adapter
• Attach the contact system with contact arm adapter
to contact arms with Ø 40 mm (see 5.).
• Tighten the contact system with the washer and hex-
agon nut (see 6.).
Tightening torques for greased threads:
- M12: 40 ±4 Nm
- M16: 100 ±10 Nm
• After installing the contact system, grease the con-
tact fingers with Molykote Longterm 2 (see 7.).
Fig. 88 Fix contact system with contact arm adapter to contact arm with Ø 40 mm
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5.
6.
7.