Eaton VCP-W User manual

Brand: Eaton

Model: VCP-W

Type: User manual

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

I.L. 3778A20B

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Effective 11/97

This device is longer than the standard VCP-W breaker.

Therefore:

1. Electrical Ground and Test Device must be

handled with extreme care while loading it on or

removing it from the extension rails.

2. The extension rails cannot be engaged or disen-

gaged with the device in the “Test” position -

the device must be either removed or in the

“Connected” position.

3. The device cannot be stored in a Vac Clad-W

breaker compartment. It can only be stored in a

storage compartment.

The stored energy closing mechanism for the power

grounding switch is the same as used in type VCP-W

breakers. It is capable of applying the ground against a

“live” circuit if operational errors have not cleared the cir-

cuit. However, in such a case, the relaying at the

source of power is expected to cause the source inter-

rupter to clear the circuit as this device has no inter-

rupting capability.

1-2.1 POWER GROUNDING SWITCH OPERATION

Closing

The power grounding switch is closed by a control

switch at the end of a 35 ft. long cable (supplied

with the device). The control switch is a spring-

return type to the neutral (unlabeled) position.

Upon turning the control switch to “Close” position

(note that the control switch does not have to be

held in the “Close” position):

1. The closing springs start to charge

2. After the springs are fully charged, they

automatically discharge to close the switch

contacts.

The control scheme (Figure 6) has an interlock

contact KT that prevents the ground switch from

closing when the selector switch is locked in the

“Lower Terminals” position by key interlock KT1 in

Figure 2. Once the ground switch is closed, it can

be locked in the closed position by removing the

cable from the receptacle on the device and locking

the sliding cover that permits access to the

receptacle and manual “Push to Open” button.

Opening

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

switch (not recommended), for safety reasons the

switch is prevented from opening in less than 20

seconds after closing.

1-2.2 TERMINAL SELECTOR SWITCH

The terminal selector switch and ground switch are

enclosed by clear polycarbonate sheets on the sides

and the top to permit viewing their position when the

device is not in the compartment. The selector switch

is operated by inserting the removable operating handle

onto the selector switch shaft located on the right hand

side of the switch, Figure 5. In order to change position

of the selector switch:

1. Insert the handle,

2. Pull and hold the latch pin out,

3. Turn the handle 90 degrees

a) Clockwise to change from the lower

terminals to the upper terminals

b) Counterclockwise to change from the upper

terminals to the lower terminals

4. Release the latch pin. The pin is spring loaded

and will latch only when the selector switch is in

a fully engaged position. The handle is not

removable if the selector switch blades are in an

intermediate position. Make certain that the pin

is latched. Moving the selector switch to the

upper position connects the upper terminals to

the lower ports and moving it to the lower posi-

tion connects the lower terminals to the lower

ports. The upper terminals are permanently

connected to the upper ports.

1-3 INTERLOCKS AND SAFETY FEATURES

The device is designed to provide as many interlocks

and safety features as practicable for the personnel per-

forming any of the operations described earlier.

The device cannot be levered into or out of the

“Connected” position unless the ground switch is open:

1. Upon levering a device with a closed grounding

switch into or out of the “Test” position, the

switch is tripped open by the floor tripper in the

compartment.

2. In the “Connected” position, the levering crank

is prevented from being engaged with the lever-

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.

I.L. 3778A20B

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Effective 11/97

1-4 OPERATION

1-4.1 SAFE PRACTICES

A GROUND AND TEST DEVICE IS A SAFETY-

RELATED DEVICE. IT MUST BE RECOGNIZED

THAT IMPROPER USE CAN RESULT IN DEATH,

SERIOUS PERSONAL INJURY, OR PROPERTY

DAMAGE. THAT IS WHY IT IS MOST IMPORTANT

THAT THE USER DEVELOP SPECIFIC AND SAFE

OPERATING PROCEDURES FOR ITS USE.

The following general safe practices are recommended:

• The device cannot be stored in a VAC CLAD-

W Breaker compartment. It can only be

stored in a storage compartment.

• Store the device in a clean, dry area free from

dust, dirt, moisture, etc.

• Keep all insulating surfaces, which include pri-

mary support insulation and insulation barriers,

clean and dry.

• Check all primary circuit connections to

make certain that they are clean and tight.

• Permit only authorized trained personnel to use

this device.

• Take extreme care while using this device to

avoid contacting “Live” or “Hot” (energized) ter-

minals.

• Do not remove the device front panel while

using this device.

• Always close the grounding switch electrically

from the farthest distance with the remote con-

trol switch.

• Before inserting the device into the compart-

ment, correctly identify line and bus termi-

nals for the breaker compartment and visual-

ly make certain that the selector switch is con-

nected to the desired terminals. Also make cer-

tain that the connected terminals are Bus 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 switch for upper or lower terminals as

desired. Remove the handle.

DO NOT ATTEMPT TO OPERATE THE SELECTOR

SWITCH WHEN IT IS ON THE EXTENSION RAILS.

FAILURE TO COMPLY COULD RESULT IN THE

DEVICE COMING OFF THE RAILS CAUSING BODILY

INJURY AND/OR EQUIPMENT DAMAGE.

2. Lift the device and load it on to the extension

rails of the breaker compartment with extreme

care.

3. Push the device to the Test position as indi-

cated by the crisp clicking sound of the levering

latch engaging the levering nut.

4. Using the breaker levering crank, lever the

device to the “Connected” position as indicated

by the red flag appearing in front of and under

the levering crank.

5. Unlock and open the lower test ports

(Selectable Terminals) and test for “dead”

circuit using correctly rated neon test stick or

equivalent.

6. After the circuit is checked “dead” and made

certain that it is maintained “dead”, connect the

remote control switch cable and close the

grounding switch from the safest distance.

7. Padlock the ground switch closed by discon-

necting the control switch cable and sliding the

cover to the left. It may also be locked by an

optional key lock K3,if provided (Figure 3).

1-4.3 CABLE TESTING

1. With the device out of the breaker compartment,

insert the selector switch operating handle and

set the switch for upper or lower terminals as

desired. Remove the handle.

CAUTION

WARNING

I.L. 3778A20B

Page 5

Effective 11/97

DO NOT ATTEMPT TO OPERATE THE SELECTOR

SWITCH WHEN IT IS ON THE EXTENSION RAILS.

FAILURE TO COMPLY COULD RESULT IN THE

DEVICE COMING OFF THE RAILS CAUSING BODILY

INJURY AND/OR EQUIPMENT DAMAGE.

2. Lift the device and load it on the extension rails

of the switchgear compartment with extreme care.

3. Push the device to the Test position as indicat-

ed by the crisp clicking sound of the levering

latch engaging the levering nut.

4. Using the breaker levering crank, lever the

device to the “Connected” position as indicated

by the red flag appearing in front of and under

the levering crank.

5. Unlock the lower (Selectable Terminal) test port

and test for “dead” circuit using correctly rated

neon test stick or equivalent.

6. After the circuit is checked “dead” and made

certain that it is maintained “dead”, insert the

insulated test probes into the lower test ports.

With the grounding switch open, apply the test

voltage 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 lower position.

Remove the handle.

DO NOT ATTEMPT TO OPERATE THE SELECTOR

SWITCH WHEN IT IS ON THE EXTENSION RAILS.

FAILURE TO COMPLY COULD RESULT IN THE

DEVICE COMING OFF THE RAILS CAUSING BODILY

INJURY AND/OR EQUIPMENT DAMAGE.

2. Lock the selector switch in the lower position

and remove key from key interlock KT1 in

Figure 4.

3. Insert the key removed in step 2 into the key

interlock 2 in Figure 2 and open upper test

ports. Unlock the lower test ports, if padlocked.

4. Lift the device and load it on the extension rails

of the compartment with extreme care.

5. Push the device to the Test position as indicat-

ed by crisp clicking sound of the levering latch

engaging the levering nut.

6. Using the breaker levering handle, lever the

device to the “Connected” position as indicated

by the red flag appearing in front of and under

the levering crank.

7. Check the “Phasing Out” according to the spe-

cific customer’s operating procedure.

CAUTION

I.L. 3778A20B

Page 6

Effective 11/97

Figure 2 Side View

34.81

3000A

3.88

34.69

1200 / 2000 A

13.63

12.00

➀ KT2 - Upper terminal test

ports key interlock

➁ Selectable terminal test ports padlock

➂ Grounding switch operation key interlock

➃ Lever latch handle

➄ Grounding switch blade

➅ KT1 - Key interlock with auxiliary switch

➆ Selector switch blade

➇ Upper terminals

(3000A shown)

➈ Lower terminals

(1200/2000A shown)

I.L. 3778A20B

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Effective 11/97

Figure 3 Front

29.00

27.81

29.50

➀ Upper terminal port

➁ KT2 - Upper terminal test

ports key interlock

➂ Selector switch position indicator

➃ Selectable terminal port

➄ Selectable terminal test ports padlock

➅ Operations counter

➆ Grounding switch position indicator

➇ Grounding switch operation interlock

➈ Grounding switch access panel

Remote control receptacle

11 Ground contact

12 Control switch

13 Manual trip button

14 Floor tripper

15 Code plate

16 Rating plate

➉

29.56

I.L. 3778A20B

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Effective 11/97

Figure 4 Selector Switch Interlock KT1

➀ KT1 - Interlock key

· Removable only when selector switch

locked with lower terminals

· With key removed, grounding

switch cannot be closed

➁ KT1 - Key interlock

➂ Key interlock bolt (shown locking selector

switch in lower position)

➃ Selector switch interlock plates

➄ Selector switch position latch pin

➅ Selector switch operating lever

(switch engaged with lower terminals)

➆ Selector switch operating shaft

I.L. 3778A20B

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Effective 11/97

Figure 5 Selector Switch Operating Handle

➀ Selector switch operating handle engaged

(switch connected with lower terminals)

➁ Spring loaded latch pin

· Pull to engage selector switch handle

· Release after removing handle

➂ Spring loaded latch pin operating ring

➃ Handle position showing selector switch

engaged with upper terminals

I.L. 3778A20B

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Effective 11/97

Figure 6 Control Scheme - Power Trip

Control Switch Box with 50 ft. # 14-3 Cable

and 3 Prong Male Twist Lock Connector

Ground and Test Device has 3 Hole Female Socket

WHITE

OPEN

GREEN

RED

LS1

LS2

CS = Control 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 Complete Charging & Closing,

20 Seconds Delay on Dropout, Blocks Tripping for 20 Seconds

After Closing

a = Auxiliary Switch Contact

b = Auxiliary Switch Contact

SR = Spring Release coil

KT = Key Interlock Contact

R = Bridge Rectifier

PS = Position Switch (Prevents Charging Between “Test” and

“Connected” Positions)

I.L. 3778A20B

Page 11

Effective 11/97

Figure 7 Control Scheme - Manual Trip

Control Switch Box with 50 ft. # 14-3 Cable

and 3 Prong Male Twist Lock Connector

Ground and Test Device has 3 Hole Female Socket

WHITE

LS1

LS2

CS = Control Switch:

CCW __Charge & Close

Vertical : No Circuit (Spring Return Position)

Y = Seal in Relay

M = Charging Motor

LS = Limit Switch (Shown - Spring Discharged)

SR = Spring Release Coil

KT = Key Interlock Contact

R = Bridge Rectifier

PS = Position Switch (Prevents Charging Between “Test” and

“Connected” Positions)ß

BLACK

Cutler-Hammer

Five Parkway Center

Pittsburgh, PA 15220

Effective 11/97 (ISI)

Style 3778A20B

Printed in U.S.A.

I.L. 3778A20B

Page 12

Eaton VCP-W User manual

Eaton VCP-W User manual

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