Installing Drawout Circuit Breaker; Circuit Breaker Positioning - Eaton IZM97 Instruction Manual

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 cut-
outs 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 New generation IZM97, 99 low voltage air circuit breaker instruction manual MN013010EN February 2020 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 IZM9 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• REMOVE (withdrawn) (Figure 2-4)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 exten-
sion 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