Page 38
1.8. 33-790-11
Fig. 33 Three-Pole Assembly
of
DS-206 Pole Units
on
Frame
blade arcing contact are located between the two hinged
blades. On the DS416 and DS420 the main contact
member, i.e. which makes actual contact with the station-
ary contacts, is a horizontal member to which all blades
are connected. On the DS632 and DS840 there are two
sets
of
contacting surfaces, one vertically above the
other, for making contact with two corresponding rows
of
stationary contact fingers. The arcing contact assembly is
bolted to the top
of
the main moving contact blade
assembly. This has the arcing contact tips,
of
arc resist-
ing metallic composition, permanently fastened near the
upper end
of
the assembly. The moving contact blade
assembly is operated by a strong and rigid insulating link.
15.75
--------:1
7.88-----
---5.0-----
---5.0-~___J
--;-
i.@
I
j_
@
ii_w
_
(])·
ji
··@
-:.-:...-
--
t--1-
,...
--=-=,.
-=----------
·=1------=-=-
---
--
--
~
~420
di
1.
lnc;tividual
Single Pole
Unit
5. Lower Main Terminal
2. Rigid Welded Frame
6.
Upper Main Terminal
3.
Molded Pole
Base
7.
Stationary Contact
Assy.
4. Sensor
8. Arcing Contact
1
9. Main Contact
1
O.
Moving Contact Assy.
11, Insulating Link
Rod
End
12. Moving Contact Pivot
Fig.
34
Three-Pole Assembly
of
DS-416 and DS-420 Pole Units on Frame
cp
-t-
i
0
D
0
D
D
D
5.25
Effective October 1998
Courtesy of NationalSwitchgear.com
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