Hubbell TMX Installation guide

Brand: Hubbell

Model: TMX

Type: Installation guide

Delta Star

TMX

Group Operated Vertical Break Switch

Installation and Maintenance Instructions

Notice

“Delta-Star” switches and operating mechanisms are designed for rapid

and simple installation. By carefully following these instructions, the pos-

sibility of error and delay can be minimized. Time spent in reading the

instructions can save many hours of installation time.

Table of Contents

Subject Page

Receiving Inspection, Handling and Storage 3

TMX Nomenclature 4

Installation and Adjustment

Assembly of Non-factory Assembled Switches 5

Installation and Adjustment 6

Maintenance 7

These instructions are written to cover the installation of the most common switches

and mechanisms. They do not take the place of the switch and mechanism drawing lay-

outs furnished with this order, but are intended to supplement them. It may be appar-

ent that these instruction do not adequately meets the demands of your installation. In

such instances where the installation is not covered by these instruction please contact

the factory for assistance at 1-800-886-1865.

Installation and Maintenance Instructions

SHIPMENT & INSPECTION

Check the total shipment for completeness against the bill of material and

installation drawings. If the switch shipping crate or the switch show evi-

dence of shipping damage note the damage on the bill of lading and notify

the appropriate person in your territory for inspection.

Uncrate and/or remove all wire ties and check to see that the switch is un-

damaged. When uncrating, be careful not to discard any attached bags of

parts. If damage is evident, report immediately to the appropriate person

in your territory for inspection.

The switches are normally shipped with the live parts bolted to the base

hardware, the insulators being shipped separately.

Bolts or other ancillary parts for use with the switch are attached to the

switch in a burlap bag. Do not discard these parts. Operating Mechanism

components are shipped on a maximum assembled basis and labeled,

showing part numbers for their associated operating mechanism drawing.

The operating mechanism components are crated, boxed, or bagged, and

shipped separately from the switch units. All necessary pipe is bundled and

tagged for shipment.

•

Do not remove the hinge bolts on the Vertical Break

Switch without opening the switch first if it is to be hori-

zontally mounted or closing the switch if it is to be verti-

cally mounted. The counter balance can pose a signifi-

cant personal risk if these important safety instruction

are not followed.

• Never disassemble the counter balance on the switch live

part mechanism assembly, as these are properly ad-

justed at the factory.

WARNING

TMX Nomenclature

Installation, Adjustment and Maintenance

Switches are normally shipped with the live parts bolted to the base. If the

switch is factory assembled with insulators, skip section one and move on

to section two. It is recommended that factory assembled switches be

checked for alignment and proper adjustment after being mounted on the

structure.

1. Assembly

Each switch is stenciled numerically for identification, i.e. 1, 11, 111.

This identification number appears on the operation mechanism draw-

ing. The switches are shipped without insulators which are to be in-

stalled in the field; some minor adjustment may be necessary. The

following procedure is for assembling and adjusting the switch units.

(A) Disengage the live parts from the base hardware. Do not disturb

the position of the operating levers. Keep the blade and hinge as-

semblies together.

(B) Mount the switch base onto the structure. Make sure that the

structure is squared and level. Shim as needed to insure that the

base is not put into a twist or bind. This could make proper

switch operation difficult to achieve.

use studs in the bottom of the insulators to make installation

easier. Check the rear (rotating) insulator to see that it is run-

ning concentric. If an insulator is not square from end to end, the

rotation could cause it to wobble. Use the leveling screws on the

pivot to true up the rotation. If this cannot be achieved, another

insulator should be used.

(D) Attach the live parts on top of the insulators. Draw up all bolts

but do not tighten fully. Install the jaw assembly to the front in-

sulator with bolts. Set the hinge and blade assemblies on the two

Before any installation is started, make sure that applica-

ble equipment is de-energized and properly grounded.

Protect the installers adequately from any adjacent elec-

trically energized parts by using barriers, screens, etc.

WARNING

rear insulators. Attach the hinge to the center insulator with

bolts. With the blade in the uncammed position, install the bolts

down through the rotator into the rear insulator. Check the align-

ment of the hinge with the jaw and tighten the mounting bolts.

With the blade still uncammed the tip is to be centered in be-

tween the contact fingers, then tighten the mounting bolts for the

jaw.

(E) Arcing horns, if used, are shipped with the switch. However, the

stationary horn is not attached for shipment. Install the station-

ary horn. Adjust the arcing horn so it does not touch when the

switch is in the closed position, but makes contact as the blade

rotates open. Only a slight pressure should exist between the

horns. Excessive pressure will cause binding during operation of

the switch.

2. Installation and Adjustment

Install the switch units onto the structure as noted in “1-B” securely

bolting the base in the position sequence shown on the operating

mechanism drawing.

(A) A vertical break switch is in the closed position when the blade tip

is fully engaged in the jaw between the contact fingers. In this

position the blade would be parallel to the

mounting base. The travel of the blade is in a

plane that passes through the longitudinal

axis of the switch phase.

(B) Fully close all phases manually by rotating the

rear insulator. In this position the blade tip

should be sitting level in the jaw and in line

with the contact finger back up springs. The

crank arm should be against the closed stop.

The arcing horn should not be in contact with the bypass arm.

See figure at right.

1. If the blade tip is not laying flat in the jaw, adjust the close

stop on the bridge. Be careful not to adjust it too far as not to

allow the mechanism to over center and thereby not locking

the switch in a closed position.

2. In the unlikely event that there is not sufficient adjustment in

the stop to allow for the blade tip to lay flat, then the blade

will need to be rotated in the blade adaptor. Loosen the u-

bolts on the blade adaptor and slightly rotate the blade. Do

not remove the blade. Tighten the nuts on the u-bolts and

check the positioning again. Repeat if necessary to achieve

proper positioning.

3. If the blade tip is more than 0.5 inches above or below the

contact finger back-up spring, the position will need to be ad-

justed. Loosen the jam nuts on the turnbuckle between the

crank arm and the connector. Lengthen or shorten the ex-

posed turnbuckle as needed to get the blade tip within toler-

ance. Be sure to firmly tighten the jam nuts back up or the

switch could come out of adjustment.

other at just past 90°. If not, adjust the open stop on the bridge

to achieve the proper position. Close each phase.

(D) Attach the inter-phase pipe and clevises to the levers on the piv-

ots. Take up the slack in the pipe and snug the piercing bolts in

the clevises. Do not pierce the pipe at this time.

(E) Attach the reach rod from the operating mechanism to the lever

on the drive phase pivot.

(F) Open the switch using the operator. If it is a motor operator, use

the manual handle. Open the switch and check the position of the

blades to see that they are inline and past 90°. Close the switch

and check to see that the blade tips are in the proper closed posi-

tion as outlined in 2-B.

(G) If either of the open or closed conditions are not met, disconnect

the drive and check the phase manually. After it operates satis-

factorily manually, reattach the clevis and adjust as needed to

achieve correct operation of the phase.

(H) Once all operations have been satisfactorily completed, the pierc-

ing bolts can be tightened completely.

3. Maintenance

Delta-Star TMX switches are designed to operate with little or no

maintenance over the life of the switch. However, when inspections

are made the following will result in an easier operating switch.

(A) Clean contacts with a steel wool, and apply a thin coat of Nye

Rheolube 368 or equal conducting PAO grease.

Special Note:

Do not use sandpaper, emery cloth or any emery product on the

contacts

(B) The hinge contacts are sealed and should never require mainte-

nance.

pared and coated with Penetrox A or equal oxide–inhibiting com-

pound.

(D) Straighten or replace damaged arcing horns.

Hubbell TMX Installation guide

Hubbell TMX Installation guide

Hubbell TMX Installation guide

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