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01.4IB.46300
Equipment Description
FlexTrol
™
Class E2 Medium Voltage Controllers with
Eaton Contactor
An electrical interlock is provided to
disconnect the control power transformer
secondary before the isolating switch stabs
are disconnected from the controller line
fingers. This interlock ensures that the switch
is breaking transformer magnetizing current
only. Do not connect additional loads to the
controller isolating switch.
!
WARNING
If loads greater than the interrupting rating
of the switch are connected to the switch,
equipment damage, personal injury, or death
may occur.
An optional key interlock may be provided to
lock the switch in the open position for special
configurations. Refer to the specific order
drawings to determine if key interlocks have
been provided.
Note:
No emergency condition can justify
forcible operation of the
MANUAL
ISOLATOR
WITH
the vacuum contactor
in the
CLOSED
position. The
MANUAL
ISOLATOR
MUST
only be operated when
the vacuum contactor is in the
OPEN
position.
CAUTION
When the vacuum contactor is closed, the
isolating switch cannot be physically moved to
the open position.
!
WARNING
This mechanical interference system must
not be defeated to open the high voltage
compartment door with FlexTrol
™
energized.
Defeating the interlock will expose energized
components and may result in injury or
death.
i. a
uxiliary
c
oMpartMents
A variety of enclosure sizes and medium
voltage compartments are furnished in
FlexTrol
™
lineups for various applications. The
following list contains examples of enclosures
and compartments.
1. Bus to metal-clad switchgear
2. Bus transitions to transformers
3. Cable entrance compartments
4. Starting reactor and autotransformer
compartments
5. Relay and metering compartments
6. Potential transformer compartments
J. p
ower
F
uses
Current-limiting fuses, designed for motor
starting service, are used for all
high-interrupting capacity motor controllers
and provide short-circuit protection.
The following is a brief description of the
power fuses used in the FlexTrol
™
design.
More detailed information regarding power
fuses can be found in the latest versions of the
Eaton IB-48041 and Technical Data Bulletin
TD02003001E.
Interrupting ratings are as shown in
Voltage and Interrupting Ratings of Eaton
Class E2 Medium Voltage Contactors
of these
instructions.
The
Type SL 400A vacuum contactor
and isolating switch combinations will
accommodate R-Type and E-Type bolt-in or
clip-in fuses.
The Type SL 800A vacuum contactor
and isolating switch combinations will
accommodate R-Type and E-Type bolt-In fuses.
Transformer feeders frequently contain general
purpose current-limiting fuses. Coordination
information for fuses can be furnished upon
request.
