User guide

44 Design and specifications are subject to change without notice S47183e rev.03 2010-06-07

Fig. 50 Changing arcing contact.

6.2.2. Contact system (before 11/2003).

Pay attention to the warnings, Section 1!

This section is valid for breakers manufactured

before 11/2003.

This section refers to maintenance works A, B, C from Table 4.

A) Remove the arc chute and adapter

• See 6.2.1-A/B.

C) Changing the protective walls and arc runners

• [Fig. 48]. Pull out two protective walls (3).

• [Fig. 50]. Loosen screws (6a) with Torx® 30 and take out

front wall (6).

• [Fig. 50]. Loosen screw (5a) with tool (SW5).

• [Fig. 50]. Take out the front arc runner as it’s shown.

• [Fig. 50]. Take out the back arc runner (4) by loosening

two screws (4a) with tool (SW5). Don’t remove the

protective cap (4b).

• [Fig. 50]. Install new front-arc runner (5) and new back-

arc runner (4). Tighten it using torque of 10 Nm [88 in-

lbs].

• [Fig. 50]. Install front wall (6) and adjust it by positioning

the protective wall (3) [Fig. 48]. Tighten it using torque of

10 Nm [88 in-lbs]

• [Fig. 48]. Put in two new protective walls (3).

Fig. 51 Taking out the front arc runner of old design