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Section 2: Receiving, handling, and installation
2-7 Installing drawout circuit breaker
In structures equipped for drawout circuit breakers, a bolted-
in cassette with movable extension rails supports the circuit
breaker. The extension rails must first be pulled all the way
out. Once the rails are fully extended, the circuit breaker can
be carefully placed on the extension rails.
It is important to take great care when placing a drawout cir-
cuit breaker on its extension rails. If the circuit breaker is not
properly seated on the extension rails, it could fall from the
rails, causing equipment damage and/or bodily injury.
Carefully lower the circuit breaker down onto the extension
rails. Be certain that the circuit breaker's four molded dra-
wout rail supports are fully seated in the extension rail
cutouts on both sides (Figure 2-3). Do not remove the
lifting yoke from the circuit breaker until it is properly
seated on the rails.
Once the circuit breaker is on the extension rails and the
lifting yoke is removed, proceed with the rest of the circuit
breaker installation.
Figure 2-4 REMOVE position
6
IZM63 / IN63 low voltage air circuit breaker MN013014EN May 2021 www.eaton.com.cn
CAUTION
Secondary Connection
Compartment
Front Door
Circuit
Breaker
Side View
Circuit Breaker Out
of Compartment On
Extension Rails
2-7.1 Circuit breaker positioning
The IZM63 / IN63 drawout circuit breaker has four normal
positions:
• REMOVE (withdrawn) (Figure 2-4)
• DISCONNECT (Figure 2-5)
• TEST (Figure 2-6)
• CONNECT (Figure 2-7)
The REMOVE position is a position outside the compart-
ment on the cassette's drawout rails where the circuit
breaker is not engaged with the levering mechanism. The
DISCONNECT, TEST, and CONNECT, positions are reached
by means of the levering mechanism.
With the breaker solidly positioned on the cassette's
extension rails and levering-in mechanism in the
DISCONNECT position, carefully and firmly push the circuit
breaker into the compartment as far as it will go. The outer
(recessed) portion of the circuit breaker faceplate should
align with the GREEN target line (labeled DISC) on the inside
top-left wall of the cassette (Figure 2-8).
Not Made
• No Electrical Connections Made
• Breaker On Extension Rails
• Remove or Inspection Position
Rear of
Compartment
Primary
Connections
Not Made
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