I.L. 3778A20B
Effective 11/97 Supersedes I.L. 3778A20A dated March, 1993
Cutler-Hammer
Type VCP-W Electrical Ground and Test Device (Complex)
!
WARNING
Figure 1 Type VCP-W Electrical Ground and Test
Device
TABLE OF CONTENTS
1-1
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1-2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1-2.1
Power Grounding Switch Operation . . . . . . . .2
1-2.2
Terminal Selector Switch Operation . . . . . . . .2
1-3
Interlocks and Safety Features . . . . . . . . . . . .2
1-4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1-4.1
Safe Practices . . . . . . . . . . . . . . . . . . . . . . . . .4
1-4.2
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1-4.3
Cable Testing . . . . . . . . . . . . . . . . . . . . . . . . .4
1-4.4
Phasing Out . . . . . . . . . . . . . . . . . . . . . . . . . . .5
READ AND UNDERSTAND THESE INSTRUCTIONS
BEFORE ATTEMPTING TO USE THIS DEVICE.
IMPROPER USE CAN RESULT IN DEATH, BODILY
INJURY AND/OR PROPERTY DAMAGE.
BECAUSE OF THE UNIQUE APPLICATION AND
VAST VARIETY OF SYSTEM AND USER REQUIRE-
MENTS, SPECIFIC OPERATING PROCEDURES
MUST BE DEVELOPED BY THE USER. FAILURE TO
DEVELOP THESE PROCEDURES COULD LEAD TO
IMPROPER USE OR OTHER MORE SERIOUS CON-
SEQUENCES.
1-1 PURPOSE
The VCP-W Electrical Ground and Test Device is
designed for insertion into a Vac Clad-W switchgear
compartment to provide a safe and convenient means to
(Figure
1
):
1.
Ground the circuit for maintenance work,
2.
Apply potential for cable testing,
3.
Provide access to both bus and line circuits for
“Phasing out” tests.
1-2 DESCRIPTION
Vac Clad-W switchgear is a two-high arrangement. In
the lower compartment the top terminals normally con-
nect to the main bus and the bottom terminals normally
connect to the incoming line or feeders. In an upper
compartment the opposite normally holds true, i.e. the
top terminals connect to the incoming line or feeders
and the bottom terminals connect to the main bus. This
must be verified for each application. Because of this
two- high arrangement, the bus and line positions of the
Electrical Ground and Test Device terminals and test
ports will vary depending upon whether the device is
used in an upper or lower compartment. Therefore, on
the VCP-W Electrical Ground and Test Device the termi-
nals and selector switch positions are referred to as
“UPPER TERMINALS” and “LOWER TERMINALS”
only. The test ports are labeled “UPPER TERMINALS”
and “SELECTABLE TERMINALS”, Figure
2
.
!
CAUTION
