I.L. 3778A20B
Page 3
Effective 11/97
ing screw unless the grounding switch is tripped
first.
•
The device cannot be placed into the breaker
compartment with the selector switch operating
handle in place - the handle interferes with the
picture frame in the breaker compartment.
•
The device cannot be placed into the breaker
compartment with the selector switch in an
intermediate position since the operating handle
is not removable with the selector switch in an
intermediate position.
•
An indicator on the front panel shows the status
of the ground switch contacts - “Open” or
“Closed”, Figure
3
.
•
The grounding switch can be locked closed with
a key interlock or padlock. This is accom-
plished by locking the sliding cover on the
device front panel to prevent access to the man-
ual “Push to Open” button and cable receptacle,
Figure
3
.
•
The grounding switch cannot be electrically
closed when the upper test ports are open. The
key interlock auxiliary switch contact KT in the
control circuit prevents closing, Figure
6
.
•
The grounding switch cannot be manually
closed. The spring charging socket and manual
close button are both covered by the device
front panel, Figure
3
.
•
The grounding switch can be closed only electri-
cally by a control switch at the end of a 50 ft.
cable supplied with the device. Access to the
manual close button is blocked by the device
front panel.
•
The power to operate the grounding switch in
this device is obtained through the secondary
disconnect in the breaker compartment.
•
The control switch cable is connected to the
device with a twist lock connector.
•
The selector switch operating handle can be
removed only when the blades are fully
engaged with either the upper or lower termi-
nals, Figure
5
.
•
The selector switch operating handle cannot be
inserted when the device is in the breaker com-
partment.
•
The selector switch mechanism has a spring
loaded latch pin which holds the blades latched
either to the upper or lower terminals.
•
An indicator at the upper left front of the device
shows the status of the selector switch contact
connection Upper Terminals or Lower
Terminals, Figure
3
.
•
The selector switch can be locked in the lower
position only with a key interlock KT1 in Figure
4
. This can be done only when the device is
outside the breaker compartment.
•
The upper test ports are permanently connected
to the Upper Terminals.
•
When electrical tripping is provided, (not rec-
ommended) the ground switch cannot be
opened electrically in less than 20 seconds after
closing, Figure
6
. This feature permits the
source interrupter to clear a fault if the ground-
ing switch is inadvertently closed on an ener-
gized circuit
as this device has no interrupt-
ing capability.
•
The upper test ports are locked closed with key
interlock KT2 in Figure
2
. They can be opened
only when the device is outside the breaker
compartment and the selector switch has been
locked in the lower position by key interlock KTl
in Figure
2
and the key obtained from KTl is
used to unlock key interlock KT2 at the upper
test ports.
•
The lower (Selectable Terminals) test ports con-
nect to the selector switch hinges. Figure
2
.
•
The terminals to be grounded are always con-
nected to the lower (Selectable Terminals) test
ports.
•
The lower test ports are always available for
voltage checking.
•
The lower (Selectable Terminals) test ports
can be padlocked in the closed position.
