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1. The breaker is held mechanically trip free during
racking. The latch check switch is also held open,
thus pre-venting any electrical close signal from
closing the breaker.
2. The breaker is permitted to be withdrawn in the safe
mode (breaker open/springs discharged) when
bringing the breaker to the Withdrawn position or to
the Connected position.
The two outlined functions are accomplished by
pushing up the tripper rollers.
When required, the customer is responsible for
providing the proper interfaces with the Series 18
opening/ closing floor trippers. Refer to the Series 18
outline drawing (Figure 1-1) for specific details as to
exact locations and the amount of travel associated
with each trip-per.
MOC Operator
The MOC (Mechanism Operated Control) switch
operator is coupled to the pole shaft. As a breaker
closes, the operator moves to change the MOC switch
contact position. MOC switch contacts operate in the
same manner as the auxiliary switch contacts in the
breaker. The MOC switch operator is located on the
bottom of the
Figure 6-3 Series 18 Primary Connection
I.B. 8295A61H07
Series 18 breaker element (Figure 6-4). An optional
additional top MOC drive is available in the form of a kit
(Style 8794C82G01).
When an MOC switch is required, it is the customer's
responsibility to provide the proper interface with the
Series 18 MOC operator. Refer to the Series 18
outline drawing (Figure 1-1) for specific details as to
the operator's location and amount of travel.
6-4 SERIES 20 BREAKER ELEMENT INTERFACES
The Series 20 breaker element can be used for
drawout or fixed breaker applications. As supplied by
Cutler-Hammer, the breaker element is of the fixed
breaker configuration and must be altered and added
to by the customer for use as a drawout breaker.
Specific electrical and mechanical interfacing details
relative to the breaker element are provided in this
section to assist the customer with its specific
application and/or retrofit of the Series 20 breaker
element.
6-4.1 INITIAL INTERFACING STEPS
Figure 6-4 Series 18 Showing Bottom Accessed
Interlocks and MOC Operator
For more information visit:
www.EatonElectrical.com
Read and understand paragraphs 6-1 and 6-2 in
their entirety before proceeding.
Instruction Book
Effective: February 2007
Page 37
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