Specifications

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© 2005 Schneider Electric All Rights Reserved 11/2005
Power-Zone
®
4
General and Application Information
Circuit Breaker Operation
Power-Zone 4 switchgear with Masterpact NW and NT circuit breakers has through-the-door circuit
breaker racking. The connect, test, and disconnect positions can be made with the circuit breaker
compartment door closed.
Through-the-Door
Circuit Breaker Position (side view)
Primary
Connectors
Secondary
(Control)
Connectors
Circuit Breaker
Functionality
Circuit
Breaker
Door
Position
Connect
Engaged Engaged
a) Can be operated
mechanically and
electrically.
b) Ready for service.
Closed
Test
Disengaged Engaged
a) Can be operated
mechanically and
electrically.
b) Can have
operation and control
systems tested.
Closed
Disconnect
Disengaged Disengaged
a) Can not be
operated remotely.
b) Can not be
removed from circuit
breaker
compartment.
Closed
Remove
Disengaged Disengaged
a) Can not be
operated remotely.
b) Can be removed
from circuit breaker
compartment.
Open
Circuit
breaker is
fully
extended on
rails.