Section 6 -Circuit Breaker Pole Units, Description And Operation; General; Moving Contact Sub-Assemblies; Three-Pole Assembly Of Ds-206 Pole Units On Frame - Eaton DS-206S series Instructions Manual

Instruction Booklet IB 33-790-1J
Effective November 2010
Section 6 - Circuit Breaker Pole Units, Description, and Operation

6.0 GENERAL

Figures 33, 34, 35, and 36 show detailed three pole
assemblies of all of the type DS circuit breakers.
DS206 has the three poles mounted on a single molded
base of high strength insulating material, with the contact
parts and sensors mounted on it. Figures 37 and 38
show front and rear views of the assembly.
The DS416, DS420, DS632 and DS840 differ in that
each of the three poles are mounted on individual insulat-
ing bases, and all three poles held in accurate alignment
by a welded steel frame. Front and rear views of each are
shown in Figures 39 and 40 for the DS416, Figures 41
and 42 for the DS420, Figures 43 and 44 for the DS632,
Figures 45 and 46 for the DS840.
Fig. 33 Three-pole Assembly of DS-206 Pole Units on Frame.
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Instructions for Low Voltage Power
Circuit Breakers Types DS and DSL

6.1 MOVING CONTACT SUB-ASSEMBLIES

The moving contact members of all ratings consist of
blades hinged at the bottom to the lower main terminal
through controlled pressure rotating contacts and with
main and arcing contacts at the upper end. The arcing
contacts of all of the five ratings shown are essentially the
same design. The number of blades, the size of the main
terminals and the number of fingers in the main discon-
necting contacts vary with the rating. The DS206 has two
moving blades, the DS416 and DS420, four moving
blades, and the DS632 and DS840, eight moving blades.
On the DS206, two butt type main contacts and a knife