I.B. 8295A61H03
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Effective 7/97
6-2.4 COMPARTMENT INTERFACE VERIFICATION
Refer to paragraph 4-3 in this instruction book for
details.
6-3 SERIES 18 BREAKER ELEMENT INTERFACES
The Series 18 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 18 breaker element.
6-3.1 INITIAL INTERFACING STEPS
• Read and understand paragraphs 6-1 and 6-2 in their
entirety before proceeding.
• Review the details presented in Table 1.1 and Figures
1-1, 3-1, 3-2, 3-7 and 5-1.
• Review the Series 18 specific control scheme (Figure
6-2) and the outline drawing (Figures 1-1) presented
earlier before proceeding.
6-3.2 ELECTRICAL INTERFACES
Secondary control access is provided by 2 12-point sec-
ondary control terminal blocks located at the top front of
the breaker element (Figure 3-1). The Series 18 control
scheme indicates which points are used for breaker
operation and which are available for customer use
(Figure 6-2).
6-3.3 MECHANICAL INTERFACES
The customer is responsible for providing all required
mechanical interfaces to insure that the Series 18 ele-
ment is properly installed and applied in a fixed or dra-
wout configuration. Depending upon the final applied
configuration, the customer is responsible for but not
limited to the following:
• An appropriate truck and levering mechanism for dra-
wout breaker designs.
• The appropriately sized and secured primary connec-
tions for fixed or drawout designs. Refer to the follow-
ing specific details entitled “Primary Connections.”
• The entire cell structure for drawout configurations
with appropriate interlocks, levering mechanisms, bar-
riers and circuit breaker interfaces to insure compli-
ance with applicable ANSI Standards.
• Properly designed and proven by test interfaces nec-
essary to operate Series 18 breaker element supplied
interlocks and auxiliary switch operators, if required.
Primary Connections
The customer is responsible for providing all properly
sized primary connections to the VCP-WR breaker ele-
ment, whether the connections take the form of cable or
bus bar (Figure 6-3). The Series 18 outline drawing
(Figure 1-1) provides breaker element primary connec-
tion details, such as primary spacings and hole patterns.
Floor Tripper Interlocks (Drawout Designs)
Open and closing floor tripper interlocks are operated by
the interaction between the floor tripper rollers on the
bottom of the breaker element and the carriage or cra-
dle assembly provided by the customer (Figure 6-4).
The functions they are intended to perform are as fol-
lows:
Figure 6-1 Typical VCP-WR Front Cover, Nameplate
and Operational Indicators
Summary of Contents for 150 VCP-WR 1500
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