Series 20 Breaker Element Interfaces; 6-4.1 Initial Interfacing Steps; Series 18 Primary Connection; Series 18 Showing Bottom Accessed Interlocks And Moc Operator - Eaton Cutler-Hammer VCP-WR 18 Series Instructions For The Use, Operation And Maintenance

I.B. 8295A61H03
1. The breaker is held mechanically trip free during rack-
ing. 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 The breaker is permitted to be withdrawn in the safe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 bring-
ing the breaker to the Withdrawn position or to the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 provid-
ing 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 loca-
tions and the amount of travel associated with each trip-
per.
MOC Operator
The MOC (Mechanism Operated Control) switch opera-
tor is coupled to the pole shaft. As a breaker closes, the
operator moves to change the MOC switch contact posi-
tion. 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
Effective 7/97
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 opera-
tor'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 electri-
cal 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

• Read and understand paragraphs 6-1 and 6-2 in their
entirety before proceeding.
Figure 6-4 Series 18 Showing Bottom Accessed
Interlocks and MOC Operator
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