ABB ZS1 Instruction Manual page 59

• Carefully remove any white rust on aluminium/
zinc surfaces with a wire brush or cleaning pad,
e.g. Scotch-Brite, and clean loosely adhering
particles with a dry, non-fraying cloth. Next treat
the cleaned parts with zinc spray or zinc dust
paint and, finally, treat with aluminium spray for
colour matching.
• Carefully remove any white rust from passivated
functioning parts and rust formation on
phosphatised parts with a wire brush or metal-
free cleaning pad, e.g. Scotch-Brite, and clean
with a dry cloth. Then grease evenly (with Isoflex
Topas NB 52).
Switchgear in general:
• Observe the maintenance instructions in the
manuals for
components.
• Check that the bolt connections at the contact
points in the busbar system and the earth
connections are tight, and that the contact
system functions correctly.
• Where required, regrease or thoroughly clean
slide plates and bearings in the panel and
regrease them with Isoflex NB 52 lubricant.
• Top up grease on contact areas in the contact
system when corroded or otherwise as
necessary, or, when lubrication is inadequate or
missing, thoroughly clean the areas concerned
and regrease with Isoflex Topas NB 52 lubricant.
• Remove the contact system for thoroughly
cleaning as described below (Figures 7/1 to 7/3):
– Slide the two inner annular tension springs 4.4
facing the breaker pole to a position beside
the other two outer annual tension springs,
thus releasing contact system 4.3, and
remove the contact system from contact arm
4.2.
– The contact pin of the contact system and the
slot on the contact arm are to be cleaned and
greased.. Fit contact system back to front on
the thin end of arbor 127 or 127.2, and slide it
forwards onto the thicker part of the shank.
– Fit arbor 127 or 127.2 onto the relevant
contact arm 4.2, slide the contact system 4.3
over onto the contact arm, and withdraw the
arbor.
– Check all contact fingers and annular tension
springs for perfect fit.
Note:
The set installation position of contact arms 4.2
must not be changed by the improper use of
force.
60
the individual equipment
Replacement of the contact pins when the
surface is damaged:
(Figure 3/19)
After any required replacement of contact pins 4.1,
the latter should be retightened using the socket
head bolts.
Thread
M 10
M 20
7.4.2 Replacement of complex functional groups
(Figures 6/6 and 7/4 to 7/10)
The precise matching of functions for control,
interlocking and signalling only permits the
replacement of individual components to a limited
extent.
The following assemblies are prefabricated and
tested at the works, maintaining high quality
standards. In the case of faults, they are therefore
to be completely replaced.
1. Withdrawable assembly:
• Disconnect plug connector 10.3,
• Remove interlock rod 13.91 with pin 13.27
from the withdrawable assembly.
• For motor-operated withdrawable assemblies,
remove the two socket head bolts (M4) which
are accessible from below the assembly.
• Remove the
withdrawable assembly (4 x M12 bolts).
• Mount the
withdrawable assembly in the reverse order,
using new circlip and special pliers for pin
13.27.
• Check the setting of interlocking rod 13.91:
– Turn spindle 18 anti-clockwise to the stop
for the disconnected position:
The distance between lever 13.26 and cam
13.25 must be 2
The distance between roller 13.24 and
angle lever 13.92 must be 0.5 mm.
– Turn spindle 18 clockwise to the stop for
the service position:
The distance between lever 13.26 and cam
13.25 must be 2
The distance between roller 13.24 and
angle lever 13.92 must be 0.5 mm.
– Loosen bolts 13.91.2 or 13.92.1 for any
necessary adjustment.
Rated tightening
torque ungreased
46 Nm
250 Nm
circuit-breaker from
circuit-breaker on a
+1
mm.
+1 mm.
ABB Power Distribution
the
new