66A5400H01
3
DESCRIPTION
The Eaton 4000A Mini-Mod is an integrated assembly for drawout vacuum circuit breakers, bus
and control devices coordinated electrically and mechanically for medium voltage circuit protection
and control. The metal-clad integrity provides maximum circuit separation and safety.
All circuit breakers are equipped with self-aligning and self-coupling primary and secondary
disconnecting devices, and arranged with a mechanism for moving it physically between connected
and disconnected positions.
All major primary components, such as circuit breaker, voltage transformer, control power
transformer and buses are completely enclosed and grounded by metal barriers.
A metal barrier in front of the circuit breaker and auxiliary drawer ensures that, when in the
connected position, no live parts are exposed by opening the compartment door.
Automatic shutters cover primary circuit elements when the removable element is in the
disconnected, test or removed position.
All primary bus conductors and connections are insulated with track-resistant fluidized bed epoxy
coating for rated maximum voltage of the assembly.
Mechanical interlocks are provided to maintain a proper and safe operating sequence.
Instruments, meters, relays, secondary control devices and their wiring are isolated, where
necessary, by grounded metal barriers from all primary circuit elements.
Corona emissions within the Mini-mod assemblies have been eliminated or reduced to very low
levels by special fabrication and assembly techniques.
By making switchgear assemblies corona free, Eaton Corporation has made its switchgear more
reliable.
Circuit Breaker Compartment
The mechanism for levering the breaker is a unique cell mounted design. It incorporates all the
safety interlocks to render the breaker mechanically and electrically trip free during the levering
procedure.
A silver plated copper ground bus provided on the levering pan assembly is engaged by a spring
loaded ground contact on the circuit breaker to ensure that the circuit breaker remains grounded
throughout its travel.
Summary of Contents for 4000A MiniMod
Page 4: ...66A5400H01 4 Figure 1 View of the 4000A MiniMod with part descriptions ...
Page 5: ...66A5400H01 5 Figure 2 Outline drawing with reference dimensions ...
Page 6: ...66A5400H01 6 Figure 3 and 4 View of the breaker in the text and connected positions ...
Page 8: ...66A5400H01 8 Figure 7 View inside the MiniMod ...
