Hubbell P801-3498 Installation guide

Brand: Hubbell

Model: P801-3498

Type: Installation guide

INSTALLATION and OPERATION INSTRUCTIONS

CHANCE DUOGAP

INTERRUPTERS

P801-3498

COUNTERCLOCK-

WISE TO REMOVE

CLOCKWISE TO

INSTALL

INTERRUPTER

RETAINING BOLT

CONTACT TERMINAL

SOCKET CASTING

DUOGAP

INTERRUPTER

HOT STICK RING

PUSH

PULL

15 - 27 kV

Counterclockwise Shown

(Clockwise Opposite Hand)

Step 3.

To install:

(1) Loosen the interrupter retaining bolt.

(2) Align the interrupter stud with the socket slot,

push the interrupter into the socket, and apply a

slight clockwise force. The stud will follow the slot

clockwise in the socket until the interrupter is

seated in its operating position. Pull back slightly

to insure proper seating.

(3) Tighten the retaining bolt just snug — do not

overtighten and cause damage to the interrupter.

DESCRIPTION

A.B. Chance Duogap

Interrupters convert Chance Type

D6, D7 switches to 600 amp loadbreak switches. Two

units are available: 7.8 - 27kV and 38kV.

Catalog No.

C801-0520-P

C801-0532-P

DUOGAP

Interrupter

7.8kV thru 27kV - 600 Amp

38kV - 600 Amp

REMOVAL/INSTALLATION INSTRUCTIONS

Step 1.

The Duogap interrupter can be removed or installed

with a hotstick. However if removal or installation is

going to be done manually the switch must be removed

from service. Follow your utility's safety procedures.

Step 2.

To remove:

(1) Loosen the interrupter retaining bolt.

(2) Rotate the interrupter counterclockwise while push-

ing inward.

(3) Pull the interrupter out of the socket casting.

NOTE: Operating the Duogap manually by hand can cause damage to the internal mechanism if the operating lever is pulled

past point of contact release. Pull lever to point of full loading just prior to tripping, let it trip and then release immediately.

15-27kV

38kV

NOTE: Because Chance has a policy of continuous product improvement, it reserves the right to change design and specifications without notice.

Removal, installation and operation of A.B. Chance DUOGAP

interrupters must be done by properly trained and qualified personnel.

Failure to follow these instructions could result in damage to equipment or personnel.

▲▲

Step 4.

Measure (according to dimension shown for the appro-

priate kV rating) and mark the Duogap operating lever.

This mark will be used to make final adjustments for

proper operation.

These instructions do not claim to cover all details or variations

in equipment, nor to provide for all possible conditions to be met

with concerning installation, operation, or maintenance of this

equipment. If further information is desired or if particular prob-

lems are encountered which are not sufficiently covered in this

guide, contact A.B. Chance Company.

STEP 4

! CAUTION

POWER SYSTEMS, INC.

P801-3498 2

OPERATION

Shown is the switch blade actuating the interrupter for a counterclockwise opening switch. Clockwise operation is

opposite hand.

(1) With the switch blade in the closed position, the

current flow is through the blade, main contacts and

the contact terminal. The Duogap

is not in the

current path.

(2) As the blade begins to open out of the main contacts,

the current flow is through the blade, arc bolt,

arcing horn and contact terminal for a short time.

The Duogap

is still not in the current path at this

time.

DUOGAP

INTERRUPTER

CONTACT TERMINAL

AND SOCKET CASTING

MAIN CONTACTS

BLADE

ARC BOLT

ARCING HORN

CONTACT TERMINAL

AND SOCKET CASTING

DUOGAP

INTERRUPTER

BLADE

MAIN

CONTACTS

(3) As the blade continues opening and the Duogap

operating lever, current flow is divided momen-

tarily into two current paths:

(A) Blade, arc bolt, arcing horn and contact

terminal.

(B) Blade, blade tip, interrupter and contact

terminal.

As the blade continues, path (A) is lost and path

(B) only remains.

CONTACT TERMINAL

AND SOCKET CASTING

DUOGAP

INTERRUPTER

OPERATING

LEVER

BLADE TIP

BLADE

ARCING HORN

MAIN

CONTACTS

ARC BOLT

3 P801-3498

(4) Current flow continues through blade, blade tip,

operating lever, interrupter and contact terminal.

When air-gap is adequate to prevent arc re-strike

between blade and arcing horn, the interrupter

trips and breaks load internally. (SEE NOTE 1.)

Loadbreak occurs when the two contacts, parting

simultaneously, split the circuit allowing a double

break in the circuit. The heat of the arcs cause

gases to generate from the delrin sleeve and liner

which expels and cools the arc. The gas pressure

is then vented through the weather/insect shield.

DUOGAP

INTERRUPTER

ARCING HORN

(5) The blade tip separates from the interrupter

operating lever after the interruption, resetting

the interrupter for the next operation.

During closing, the switch blade arc bolt picks up

the arcing horn before the blade tip brushes past

the operating lever of the interrupter, thus only

limited current is through the interrupter.

NOTE 1.:

When blade tip intersects with mark on

lever the tripping mechanism has

reached its full free travel just prior to

tripping. If tripping occurs other than

described, adjustments are required.

Loosen arc bolt and move blade end in

or out. Retorque arc bolt to 25 ft.-lb.

OPERATING

LEVER

BLADE TIP

AIR GAP

WEATHER/

INSECT SHIELD

INTERRUPTER TRIP POSITION

CONTACT TERMINAL

AND SOCKET CASTING

BLADE END

ARC

CHAMBER

OPERATING

LEVER

BLADE TIP

ARC BOLT

BLADE

ARCING HORN

CONTACT TERMINAL

AND SOCKET CASTING

CLOSING

ARC BOLT

DUOGAP

INTERRUPTER

Hubbell P801-3498 Installation guide

Hubbell P801-3498 Installation guide

Hubbell P801-3498 Installation guide

Related papers

Other documents