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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

Summary of Contents for VCP-W

Page 1: ...ertion 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 bot...

Page 2: ...ning The grounding switch can be opened by manual operation of the Push to Open button located behind the sliding cover on the device front panel Figure 3 If electrical trip is provided at the control...

Page 3: ...lector 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...

Page 4: ...us or Line as desired Typical procedures for use of this device are as follows 1 4 2 GROUNDING 1 With the device out of the breaker compartment insert the selector switch operating handle and set the...

Page 5: ...tage to the cables via the insulated test probes 1 4 4 PHASING OUT 1 With the device out of the switchgear enclosure engage the selector switch operating handle and set the selector switch to the lowe...

Page 6: ...63 12 00 9 8 7 KT2 Upper terminal test ports key interlock Selectable terminal test ports padlock Grounding switch operation key interlock Lever latch handle Grounding switch blade KT1 Key interlock...

Page 7: ...erlock Selector switch position indicator Selectable terminal port Selectable terminal test ports padlock Operations counter Grounding switch position indicator Grounding switch operation interlock Gr...

Page 8: ...witch locked with lower terminals With key removed grounding switch cannot be closed KT1 Key interlock Key interlock bolt shown locking selector switch in lower position Selector switch interlock plat...

Page 9: ...3 4 Selector switch operating handle engaged switch connected with lower terminals Spring loaded latch pin Pull to engage selector switch handle Release after removing handle Spring loaded latch pin...

Page 10: ...ntrol Switch Vertical No Circuit Spring Return Position CW Close CCW Trip Y Anti Pump Relay M Charging Motor LS Limit Switch Shown Spring Discharged ST Shunt Trip Coil TD Time Delay Relay Seals in to...

Page 11: ...has 3 Hole Female Socket KT PS WHITE CLOSE W 1 Y X R 24 M SR Y LS1 b LS2 Y CS Control Switch CCW __Charge Close Vertical No Circuit Spring Return Position Y Seal in Relay M Charging Motor LS Limit Swi...

Page 12: ...Cutler Hammer Five Parkway Center Pittsburgh PA 15220 Effective 11 97 ISI Style 3778A20B Printed in U S A I L 3778A20B Page 12...

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