Installation
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2021-11-15
• Place the contact system on a surface so that the openings of the contact sys-
tem are not covered.
• A device for centring the contact system may be required.
• Position the inner part (metal body) of the contact system over the opening with
the narrower side facing inwards (see 1.).
• Press the inner part (metal body) of the contact system through the contact fin-
gers (see 2.) until the rear part of the contact fingers is in the groove (see 3.).
• Grease the contact fingers with Molykote Longterm 2 on the inside (round outer
edge) of the contact system (see 4.).
• Mount the contact system on the threaded rod and contact arm, paying attention
to the position of the contact system in relation to the contact arm (see 5.).
• Tightening torque applies to greased threads only
- M12: 40 ±4 Nm
- M16: 100 ±10 Nm
• Grease contact fingers of the contact system with Molykote Longterm 2.
Function test
After completing all work on the vacuum circuit-breaker, perform a function test in
accordance with “Commissioning”, p. 69.
Fig. 106 Installation of the contact systems on the con-
tact arms
M12: 40 ±4 Nm
M16: 100 ±10 Nm
