PASCOR ATLANTIC TTR-8 Installation And Adjustment Manual

Vertical break switch

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IB-TTR8-C

Jan. 2017

Installation and Adjustment Manual

For Type TTR-8 Vertical Break Switch

7.5kV thru 230kV

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Table of Contents

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Summary of Contents for PASCOR ATLANTIC TTR-8

Page 1 IB-TTR8-C Jan. 2017 Installation and Adjustment Manual For Type TTR-8 Vertical Break Switch 7.5kV thru 230kV Page 0...
Page 2 Contents Subject Page Receiving and Handling ..........Installation and Adjustment Step 1.
Page 3: Step 2. Assemble Insulators
IMPORTANT: Read manual before installing or maintaining equipment! Make absolutely sure that equipment is de-energized and properly grounded. This manual should be used in conjunction with the factory drawings. The drawings contain critical information, which if not followed could affect the operation of the switch. Instructions can not cover all possible variations in equipment nor provide for every possible contingency to be met in connection with installation, operation or maintenance.
Page 4: Step 3. Insulator Stack Alignment
Note: The counterbalances are assembled at the Rotor or Spacer Base factory for the mounting positions as required for Shims (As Reqired) each installation. If it is necessary to change the Taper Washer mounting position of the switch in the field, the Base Channel Flange (When Used) counterbalance must be changed as well.
Page 5: Step 7. Mount Offset Bearing
Fork Link Gooseneck Crank Contact Blade Dimension D Fingers Counterbalance Jaw Casting Terminal Blade Clamp Terminal Blade Stop Rotating Insulator Tie Casting Fig. 3 Typical Set of Current Carrying Parts Important: If it is expected that the conductors to due to many variables and tolerances plus the free be attached to the switch jaw will impose an play or clearance in pin connections of all the appreciable horizontal force, it is recommended...
Page 6 Pipe Splice When Structure Height Exceeds Bearing Plate 23 Feet Vertical Operating Pipe (VOP) Ground Strap Adjustable Lock Plate With Position Indication Kirk Key Interlock And Interlocking Swing Handle Adapter (Optional) Fig. 5 Typical Three-pole TTR-8 Switch Installation Page 5...
Page 7: Step 9. Install Vertical Operating Pipe
2. Install accessory items. Refer to the drawings shipped with the unit for Offset Rod instructions on installing accessory items Switch (auxiliary switches, mechanical interlocks, position indicators, ground straps, etc.) Multi-Angle which mount on the vertical operating pipe. Switch Crank Crank Step 10—Install Pipe Splice and Guide Plate Vernier...
Page 8: Step 12. Install Operating Mechanism
Step 12—Install Operating Mechanism Worm Gear Mechanism 1. With ground strap in place on vertical operating Two types of manual operating mechanisms pipe, slide worm gear mechanism over the are available for the TTR8 Switch: vertical operating pipe and attach it to the •...
Page 9: Switch Adjustment Tips
Switch Adjustment Tips The section will cover the concepts to properly adjust your switch. When operating the switch, the offset bearing should “snap” over dead-center in the closed and open positions. This is also referred to as toggle. This serves as a signal to the operator that the switch is either fully open or closed.
Page 10 The Adjustable Radius Crank is located on the offset bearing. It is used to adjust the total degrees of opening or closing of the switch and to increase or decrease the toggle pressure. If the toggle pressure is the same in the open and closed positions, and the switch doesn’t open and close all the way.
Page 11: Step 15. Arcing Horn Installation
7. For swing handle operating mechanisms: Step 15—Arcing Horn Installation Arcing horns consist of a movable straight horn a. Operate the switch and move the and a stationary horn. Arcing horns for 242kV adjustable lock castings until they exert switches are essentially the same except that the pressure against the handle in both the stationary horn contacts the movable horn at the open and closed positions of the switch.
Page 12: Maintenance
To connect copper-to-aluminum terminals: Notice: Contaminated environments 1. Except for plated surfaces, clean all contact operation in sleet conditions also may require surfaces of conductors and fittings using a stiff applying the lubricants at pivot points. The wire brush to remove heavy oxide coatings grease should be durable and able to retain its until the aluminum finish is visible and viscosity over a wide temperature range.
Page 13 4. Lower the blade to approximately a 15 degree Appendix A angle. 5. At near this point, connect counterbalance plunger to the proper point for vertical mounting by re-installing pin A. 6. Raise the blade to relieve pressure. 7. Remove the vise grip pliers. 8.
Page 14: Trouble Shooting
Trouble Shooting Guide CONCERN ACTION If the angle is less than 90°, locate the open stop bolt at the base of the rotating insulator (Left hand side). Loosen the jam nuts on the stop bolt and turn the bolt inward until the 90° angle is obtained. Proper adjustment of the switch in the open position is accomplished when the moving contact or "beavertail"...
Page 15: Renewal Parts
CONCERN ACTION If the blade is driving into the stop creating a binding situation, shorten the Blade hits hard againts the jaw assembly by turning the clevis counter-clockwise in 1/2 turn increments until the stop correct height is achieved. (pg. 4) Outboard bearing snaps violently If the offset bearing is pushing the swich closed, shorten the offset rod.