Document number: SG104148TEN
Revision: B01
Issue date: 20.8.2012
Copyright© 2012 Sécheron SA - This document is not contractual and contains information corresponding to the level of technology at the date of release.
File: d-UR46-8S_maint_en.fm
D-31
UR46-81/82S
Maintenance
D.4
Part replacement criteria
Refer to the “parts catalogue” chapter for the location of the parts.
For parts that are subject to wear due to current interruptions:
* These parts should be changed simultaneously
Replace the following parts, subject to wear due to mechanical operations, according to the
number of cycles (counted or estimated).
One cycle is one opening and one closing of the circuit-breaker (with or without load).
Refer to the “spare parts catalogue” chapter for the location of the parts
* To be replaced completely, or returned to Sécheron SA for repair.
Item position
Name of the component
Replacement criteria
See §
130 -
F.4.1
2 -
F.4.1
1192 -
F.4.1
Moving contact*
Fixed contact*
Pole*
When dimension W
1
≤
22
±
0.5
mm or
W
2
≤
3
±
0.5
mm.
D.6.2
D.7
1196,1197 -
F.4.1
Spark arresters
When the marks left by local burns reach a depth
that is half the part’s original thickness or when
cracks appear.
D.7
5806 -
F.4.6
Horns (81)
Horns (82)
When their cross-section reaches half the part’s
original cross-section (20 x 4 mm
2
).
D.9
5802 -
F.4.6
5803 -
F.4.6
5804 -
F.4.6
De-ionization plates
When the marks left by local burns reach a depth
that is half the part’s original thickness (2.5 mm).
When vertical cracks appear.
D.9
5805 -
F.4.6
Baffles
When they are touching each other.
When the wear (1) reaches a height
that is half the part’s original height.
D.9
1
1
Important!
These frequencies are given for normal (abnormal conditions are listed in §
C.2
).
The user should adapt these frequencies when using this device in other condi-
tions.
Item position
Name of the component
Number of cycles
See §
1330 -
F.4.2
131 -
F.4.1
Fork assembly
Catch
25’000
D.7
D.8
334 -
F.4.2
370 -
F.4.2
710 -
F.4.5
720 -
F.4.5
Compression spring
Closing core
Pusher assembly
Shock absorber
50’000
D.10
D.10
D.13
D.13
300 -
F.4.2
Closing device
150’000
D.10
1200 -
F.4.4
1250, 1280, 1290 -
G.4.6
Direct over-current instantaneous
release*
Optional indirect release*
Criterion: Every 10’000 trips (every
10 years at a rate of 3 trips per day).
D.12
G.4
Summary of Contents for UR46-81S
Page 68: ...Secheron ...
