Current Limiting Fuses - Eaton Cutler-Hammer AMPGARD Technical Data Manual

Type SL 200/400 Ampere Vacuum Contactor Stab-in with
Wheels, and Line and Load Fingers
400 Ampere Stab-in Contactor
200/400 Ampere Bolt-in
The bolt-in version of the Cutler-Hammer SL Contactor is supplied as
standard for those applications requiring a 200 ampere or 400 ampere
contactor. The contactor is mounted on wheels and rolls into the
AMPGARD structure on steel rails. Bolted bus bars connect the con-
tactor line and load terminals to the power components in the starter
cell. A 3-phase current transformer, 3-phase potential transformer and
ground fault current transformer are mounted in the cell when required.
A plug on the side of the contactor connects the contactor to the low
voltage control panel.
The contactor is easily removed from the structure by removing the
six bolts securing the contactor line and load terminals, and the pin
connecting the isolating switch interlock arm. The contactor can be
removed from the starter without disconnecting any medium voltage
cables.
200/400 Ampere Stab-in
A stab-in version of the SL Contactor is an available option. The stab-in
contactor is mounted on wheels and rolls into the AMPGARD struc-
ture. Contactor line and load fingers engage cell- mounted stabs as
the contactor is inserted into the starter cell. The contactor is held in
position by a bolt and bracket combination. It can be easily withdrawn
from the starter cell by removing the bolt holding the contactor
against the bracket and disconnecting the isolation switch interlock.
The contactor can be removed from the starter without disconnecting
any medium voltage cables.
Mechanical
Interlock with
Isolation Switch
Rollout
Wheels
FIGURE 2. STAB-IN CONTACTOR MECHANICAL INTERLOCK
EATON CORPORATION Cutler-Hammer Chiller Starter (AMPGARD) Technical Data TD02003003E

Current Limiting Fuses

AMPGARD starters use Cutler-Hammer Type CLS power fuses with
special time/current characteristics for motor service. The fuse is
coordinated with the contactor and overload relay characteristics
to provide maximum motor utilization and protection. The standard
mounting method for power fuses is bolted with an option for
fuse clips.
Interruption is accomplished without expulsion of gases, noise or
moving parts. Type CLS fuses are mounted in a vertical position to
ensure maximum rating reliability, proper operation and to eliminate
the possibility of dust and dirt collecting, resulting in a deterioration of
dielectric properties. When a fault has been cleared, a plastic indicator
in the top of the fuse, normally depressed, pops up to give visible
blown fuse indication. This indicator also operates the optional blown
fuse mechanism (available with bolted fuses only) on the isolation
switch that gives a contact closure to allow use in the starter control
circuit.
The control circuit primary fuses are also current limiting.
Blown fuses may be removed and replaced without removing or
drawing out the contactor.
Self-Aligning Contactor
Line and Load Fingers
Blown Fuse Indicator
CLS Clip Fuse
Standard Fuse Mounting is Bolted with Optional Clip Mounting
Blown Fuse Indicator
Operating Arm
Blown Fuse Indicating Device
CLS Bolted Fuse
Fuse Fault Indicator
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