Figure 3-3 Typical DSII Faceplate
3-4.2 Primary Stationary Contact Assembly
The stationary contact assembly consists of butt type main
contacts which carry the main continuous load current. It is
comprised of a multiplicity of individual fingers. Each finger
is hinged at the upper end under controlled pressure. The
stationary arcing contacts are similar for all frame sizes and
consist of two parallel fingers, one on each side of the upper
main terminal. They are spring loaded toward each other by
compression springs and have arc resisting tips. The previ-
ously described moving arcing contact wedges the station-
ary contact fingers apart as the breaker closes. In addition,
the parallel action of the magnetic fields of the currents in
each arcing contact finger causes the fingers to be attracted
toward each other when closing against fault currents. This
results in a “blow-on” action on the arcing contacts.
3-5 Interphase Barriers
Glass polyester interphase barriers assist in maintaining
proper clearances and must be in place at all times dur-
ing circuit breaker operation within its compartment. Each
barrier is held firmly in place by its positioning in the circuit
breaker, with no fastener of any type required (Figure 3-8).
Effective July 2010
Instructional Book IB694C694-03
18
EATON CORPORATION www.eaton.com
4 5 6
7 8
9
10
11
3
2
1
1 Digitrip Trip Unit 5 Shutter (Levering Shaft Access) 9 Push to Close Button
2 Nameplate 6 Open-Close Indicator 10 Spring Charge Indicator
3 Emergency Charge Handle 7 Padlock Plate 11 Remove Assist Handle
4 Drawout Position Indicator 8 Push to Trip Button
To Next Page
Loading...
Need help?
General
