Informational Brochure

PASCOR ATLANTIC Delivering More… Delivering Service

PASCOR ATLANTIC Delivering More... Delivering Service

Located in the beautiful mountains of southwest Virginia, the company was founded in 1910 as R&IE in Greensburg, PA. Pascor Atlantic is the Successor Company of some of the most recognized names in the electrical industry. R&IE, ITE, Gould, BBC and ABB each influenced the products, designs and operating philosophy. This impressive heritage provides the foundation for what is today Pascor Atlantic. Pascor Atlantic offers vertical break, double end break and center break in ratings to 800kV and 5000A to meet customer needs. A complete array of accessories, including motor operators, high-speed ground switches, auxiliary switches, arcing horns, whips, interlocks and interrupters, are available. Pascor Atlantic’s designs have been tested to ANSI and IEEE standards and have completed extensive seismic testing. Pascor Atlantic is unique with over 90 years of service to the electrical industry and proven products to meet virtually every need. Pascor Atlantic has demonstrated a commitment to rapid and continuous improvements in products, facilities and processes. The current facility was constructed in 1995 for the exclusive production of Air Disconnects. Also in 1995, the highly successful TTR 8 product family was introduced. The company became ISO 9002 certified in 1997 and remains the only domestic supplier to be so certified. The facility and employees were recognized by ABB for excellence in production and supply management in 1997 and 1998, respectively. ABB designated the facility as the worldwide center of excellence for the production of Air Disconnects in 1999. This designation included the responsibility to train ABB management from seven countries in production techniques. Most recently, the company completed ISO 14000 certification. The history of improvements is undeniable and attests to the dedication of every Pascor Atlantic employee to the principle of continuous improvement.

A 38,000 square foot modern facility employs contemporary concepts in manufacturing and supplier involvement. The result is production cycle times of one shift providing unmatched responsiveness to customer needs. When coupled with an experienced, dedicated work force, an integrated supply base and a greater than 98% on-time delivery performance, these advantages make Pascor Atlantic a truly world class facility.

Pascor Atlantic  Air Switch Division – State Route 42 

254 Industry Drive – Bland, Virginia 24315‐9709  Phone: 276‐688‐3328 – Fax: 276‐688‐2228 or 2229  www.pascoratlantic.com

Delivering More... Delivering Service SWITCH HISTORY Developed by RAILWAY & INDUSTRIAL ENGINEERING COMPANY 1910 - First air switch built to interrupt load current, known as the “Burke” switch. (Original in Ford Museum, Dearborn, Michigan) 1924 - First switch with high-pressure contact and rotating blade, which opened vertically. 1925 - First 230 KV switch east of the Rocky Mountains. 1929 - First double-break switch with rotating blade (TTT). 1929 - First high-pressure spot contacts for disconnecting switches. 1941 - First automatic high-speed grounding switch. 1943 - First silver-to-copper contacts. 1947 - Acquired by I-T-E Circuit Breaker Co. (Name changed to R&IE Equipment Division of I-T-E Circuit Breaker Co.) 1949 - First shuntless switch (TTR-49). 1959 - Name changed to I-T-E Circuit Breaker Company.

1960 - First aluminum switch (TTR-6). 1964 - First 500 KV vertical break switch. 1964 - First 1-1/2" ice breaking switch. 1968 - First 765 KV vertical reach switch. 1969 - Name changed to I-T-E Imperial Corp. 1976 - Name changed to Gould Inc., Power Systems Division. 1979 - Name changed to Gould - Brown Boveri. 1981 - Name changed to Brown Boveri Electric, Inc. 1984 - Name changed to Brown Boveri, Inc.

1984 - Moved switch operation to Bland, Va. 1985 - Name changed to Brown Boveri Power Equipment

1986 - Name changed to Asea Brown Boveri 2000 – Name changed to Pascor Atlantic

References: Greensburg plant publication “GD-20 9/72"; “The Genealogy of a Corporation: I-T-E” by W. Maxwell Scott Jr. and list compiled by Charles R. Stewart.

Outdoor Air Switches Selection and Application 8.3 thru 800 kV Max. Voltage 600 thru 5000 Amperes

Delivering More... Delivering Service

Pascor Atlantic Air Switch Division – State Route 42

254 Industry Drive – Bland, Virginia 24315-9709 Phone: 276-688-3328 – Fax: 276-688-2228 or 2229 www.pascoratlantic.com

Selection and Application of Outdoor Air Switches Introduction Outdoor Air Switches are an essential element of electrical power transmission and distribution systems. They provide positive, visible air gap isolation of equipment and line sections for safe examination, maintenance, and repair. In the closed position, air switches must provide adequate capacity to handle all normal and abnormal currents that flow in the system. Finally, air switches must provide for ease of mechanical or electrical operation even under adverse conditions such as heavy ice coatings or corrosive atmospheres. In order to properly maintain the integrity of an electric power system, careful attention must be given to the selection and application of air switches . Insulator Cantilever Strengths Insulator stacks for any given voltage rating are available with several cantilever strength ratings such as standard strength, high strength and extra high strength. To determine which stack rating to use, it is necessary to calculate the short-circuit forces per linear foot acting on the conductors which the insulators are supporting. The NEMA formula for calculating this force is as follows:

The important considerations are:

x Insulation level to be provided. x Continuous and momentary currents to be encountered. x Insulator characteristics required. x Electrical Clearances and space limitations. x Current interrupting requirements. Air switches are built in a variety of physical forms to accommodate the various requirements of electrical clearances and limitations. Also, when used as interrupter switches, various interrupting attachments are available. Information in this publication provides a basis for selecting equipment best suited to solve most common applications. fault forces, under test conditions that are as little as 35 percent of those calculated by the equation. It is generally agreed that for outdoor substation practice, a safe multiplier to be used with the equation results is somewhere between 0.5 and 0.6. It is our standard practice to use 0.6 multiplier unless otherwise specified by the user. Further, it is our policy to limit the actual forces on the insulators to a maximum of 60 percent of their published cantilever rating. For the example given, then, a more realistic fault force is 24# x 0.6 or 14.4 pounds per foot. As noted in the bus arrangement, this force results in a maximum cantilever load of 576# at the insulator position, which supports the longest bus section. At the 115-kV rating, the published cantilever strength post-type insulator stack is 1700 pounds. When used at 60 percent of rating, the unit would have a safe allowable strength of 1020 pounds, which is quite adequate to satisfy the maximum loading required in the example. It should be noted that short-circuit loadings on switch insulators are usually less than the loadings on adjacent bus insulators, since the conductors terminate on the switch insulators and only 50% of the span applies. Notes: 1. The above applies to both upright and inverted mounted arrangements using published cantilever values. However, for insulators mounted horizontally, it is standard practice to use 40% of the upright published cantilever rating for short circuit forces. 2. If the short-circuit current (RMS asymmetrical) is not known, then the momentary rating of the switches, or the

The theoretical equation, as presented, has been found to produce fault forces on busses that are in excess of those actually experienced. Because of the inherent inertia of the bus bars, the flexibility of insulator mountings and supporting structures, some investigators have measured

breakers can be used, whichever is smaller. Switch momentary ratings are 3-phase RMS asymmetrical. Breaker ratings are 3-phase RMS symmetrical , which must be multiplied by 1.6 to convert to RMS asymmetrical

1

Selection on Basis of Insulation Level

Table 1 - Insulators

Available Insulators c Post

Ratings, kV

Insulator Technical Reference Number

Notes:

Post

Bolt Circle

Maximum Design

Nominal

BIL

For complete mechanical and electrical characteristics, contact the nearest sales representative.

Standard Strength

High Strength

3"

5"

8.3

7.2

95

202 205 208 210 214 216 286 288 291 304 312 324

222 225 227 231 267 278 287 289 295 308 316 368

8 8 8 8 8 8 8 8 8

8 8 8 8 8 8 8 8 8 8 8

15.5

14.4

110 150 200 250 350 550 650 750 900

27 38

23

d Technical Reference numbers not assigned by NEMA.

34.5

48.3 72.5 123 145 170 245 245 362 550 550 800

46 69

115 138 161 230 230 345 500 500 765

e Not available

e

1050 1300 1550 1800 2050

e e

d d e e

Switch open gap dimensions are selected to provide voltage withstand characteristics that exceed line-to-ground voltage withstand characteristics in order to protect personnel and equipment.

TABLE OF CONTENTS

PAGE

Table 2 - Switch Open Gaps

SELECTION AND APPLICATION Insulator Cantilever Strengths . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Insulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Switch Open Gaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Ground Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Phase Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Switch Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 INTERRUPTER ATTACHMENTS Arcing Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Arc Restrictor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Vacuum Interrupter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Summary of Devices and Ratings . . . . . . . . . . . . . . . . . . . . . . . 7 SWITCH OPERATING MECHANISMS MO-10 Motor Operator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10 Swing Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Worm Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Three-Pole Torsional Control . . . . . . . . . . . . . . . . . . . . . . . . . . .11 ACCESSORIES Grounding Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Cable Guides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Auxiliary Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 EHV Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Min. (inches) Metal-to-Metal

Ratings, kV

Double Break One End

Single Break

Maximum Design

Nominal

BIL

8.3

7.2

95

7

NA NA NA

15.5

14.4

110 150 200 250 350 550 650 750 900

10 12 18 22 32 50 60 68 84

27 38

23

34.5

12 15 22 32 38 44 50 57 57 66

48.3 72.5 123 145 170 245 245 362 362

46 69

115 138 161 230 230 345 345

1050 1050 1300

104 104 120

Above 362 kV maximum design, switch open gap dimensions are dictated by expected maximum switching surge voltage levels.

2

Selection on Basis of Insulation Level

Table 3 - Ground Clearance

Clearance Between Overhead Conductors & Ground for Personnel Safety

Clearance Between Overhead Conductors & Roadways Inside Enclosure

Clearance to Ground for Rigid Parts

Ratings, kV

Recommended Inches

Minimum Inches

Recommended Feet

Minimum Feet

Recommended Feet

Minimum Feet

Nominal

BIL

Maximum Design

7 1/2

95

8.3

7.2

6 7

10 10 10 11 11 12 13 14 14 15 16 16 18

8 9

21 21 21 22 22 23 24 25 25 26 28 28 30

20 20 20 22 22 23 24 25 25 26 28 28 30

15.5

14.4

110 150 200 250 350 550 650 750 900

10 12 15 18 29 47

27 38

23

10 13 17 25 42 50 58 71 83 84

10 10 10 11 12 13 14 15 16 16 18

34.5

48.3 72.5 123 145 170 245 245 362 362

46 69

115 138 161 230 230 345 345

52 1/2 61 1/2 90 1/2 90 1/2 76

1050 1050 1300

106

104

Above 362 kV maximum design, electrical clearances are dictated by expected maximum switching surge voltage levels.

Table 4 - Phase Spacing

Recommended Φ to Φ Inches

Ratings, kV

Vertical Break Disc. Switch with GRD Switch

Double Side Break Disc. Switch & Bus Supports

Vertical Break Disc. Switch

Live Parts Minimum Metal-to- Metal

Single Side Break Disc. Switch

Center Side Break Disc. Switch

2500 & 3000 Amp 30° Rise

Horn Gap Switch

600 thru 3000 Amp

600 thru 2000 Amp 3" B.C.

Maximum Design

2500 & 3000 Amp 5" B.C.

Nominal

BIL

4000 Amp

8.3

7.2

95

7

18 24 30 36 48 60 84 96

36 36 39 42 48 60 84 96

36 38 42 46 50 60 84 96

40 40 44 48 52 60 84 96

18 24 30 36 48 60 84 96

30 30 36 48 60 72

30 30 36 48 60 72

36 36 48 60 72 84

d d

c c c c c c

c c c c c c

15.5

14.4

110 150 200 250 350 550 650 750 900

12 15 18 21 31 53 63 72 89

27 38

23

34.5

48.3 72.5 123 145 170 245 245 362 362

46 69

115 138 161 230 230 345 345

108 132 156 192 216 216 240

108 132 156 192 216 216 240

120 144 168 192 216 216 240

108 132 156 156 174

108 132 156 156 174

108 132 156 156 174

108 132 156 156 174

108 132 156 156 174

1050 1050 1300

105 105 119

Above 362 kV maximum design, electrical clearances are dictated by expected maximum switching surge voltage levels. Notes: c Minimum Dimension d Use Disc. Switch dimension if greater.

3

Selection on Basis of Switch Types

Table 5 – Switch Application

Switch Mounting Position

Available Interrupting Attachments

Ratings

Switch Type

IEEE Designation

Voltage, kV

Continuous Current, Amperes

Maximum Design

Nominal

Type

Ratings, kV

8.25 - 245 9 9 9 Upright Vertical

Inverted

Arcing Horns Arcing Horns

8.3 - 170 7.2 - 161 600 - 5000

1 Vertical

362 - 800 9

TTR6

245 & 362 230 & 345 1200 - 5000 Arc Restrictors

8.25 - 145 9 9 9

550 & 800 500 & 765 2000 - 4000

38 - 245

Vacuum Interrupters

9

2 Double End 2A Double End VEE 4 Side

Arcing Horns Arcing Horns Arc Restrictors Arc Restrictors Arcing Horns Arcing Horns

7.25 - 169 9 9 9 245 - 362 9 9 9 72.5 - 245 9 9 9 7.25 - 169 9 9 9 245 - 362 9 9 9 72.5 - 245 9 9 9 8.25 - 145 9 9 8.25 - 145 9 9 9 38 - 72.5 9 9 9 8.25 - 245 9 9 9

TTT7 72.5 - 550 69 - 500 2000 - 5000

TTT7-V

72.5 - 550 69 - 500 2000 - 5000

Arcing Horns Arc restrictor Vacuum Interrupters

A7

8.3 - 145 7.2 - 138 600 - 1600

8.3 - 245 7.2 - 230 600 - 3000 Arcing Horns

DR7 DR9

5 Center 6 Grounding 7 Grounding

362

345

3000 Arcing Horns

362

9

100, 120 kA Momentary 40, 61, 70 kA Momentary

AG7

8.3 - 245 7.2 - 230

None

9 9

9

None

AG8 121 - 245 115 - 230

9 9 9

8.25 - 245 9 9 9 8.25 - 145 9 9 9 8.25 - 245 9 8.25 - 245 9 9 9 8.25 - 145 9 9 9 8.25 - 245 9 9 9

Arcing Horns Arc Restrictor Vacuum Interrupters Arcing Horns Arc Restrictor Vacuum Interrupters

TTR8

8.3- 362 7.2 - 345 600 - 3000

9 Vertical Reach 10 Center VEE 8 Vertical 8A Vertical VEE

8.3 - 245 7.2 - 230 600 - 3000

TTR8-V

121 - 169 115 - 161 1200 - 4000

VT2

None

9

242 - 800 230 - 765 2000 - 4000

48.3 - 169 9 9 9

Arcing Horns

DRV 25.8 - 170 23 - 161

600 - 3000

Arc Restrictors

48.3 - 145

9

9

8.25 - 123 9 9 9 8.25 - 123 9 9 9 8.25 - 245 9 9 9 8.25 - 145 9 9 9

8.3 - 123 7.2 - 115 600 - 1200 Arcing Horns

11 Vertical

Arcing Horns Arc Restrictors Arc Restrictors

FAS3

8.3 - 245 7.2 - 230

2000

9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

15.5 - 72.5 15 - 69

1200 Arcing Horns

15.5 - 72.5

12 Center VEE 13 Center 14 Side 15 Grounding

FAS2V

38 - 245

38 - 245 34.5 - 230 2000 Arcing Horns

15.5 - 72.5 15 - 69 15.5 - 72.5 15 - 69 8.3 - 145 7.2 - 138 8.3 - 145 7.2 - 138

1200 2000 1200 2000

Arcing Horns

15.5 - 72.5

FAS2

FAS4

Arcing Horns

8.25 - 145

40, 61, 70 kA Momentary

None

FAS-GRD 8.3 - 145 7.2 - 138

9

9 9

4

Interrupting Attachments

Arcing Horn The Arcing Horn is the simplest form of interrupting attachment. It consists of a stationary horn attached to the jaw of the switch and a movable horn attached to the blade. The purpose of the arcing horn is to avoid arcing at the main contacts of the switch during current interruption. Arc extinction is achieved by stretching out the arc. Arcing horns are used to make or break: x Magnetizing current of small transformers x Charging current of substation busses or short Transmission lines The arcing horn has been designed to require only minimum contact pressure in order to maintain minimum operating effort. Arc reach, which is the perpendicular distance between the peak of an arc and a straight line drawn between the two parting contacts (Fig. 2), should be considered for phase spacing and clearance to ground. It may be necessary to keep the arc to a minimum of 2 feet, depending upon location of equipment and recognizing environment and personnel considerations. In order to reduce the possibility of phase-to-phase faults, horn-gap switches are mounted on wider phase spacing than used for disconnect switches. For phase spacing of horn-gap switches and arc reach for various currents and voltages see Table 7.

Note: 1. Use Disc. Switch Dimension (Table 4) if greater.

5

Interrupting Attachments

Arc Restrictor The arc restrictor is an extremely effective means of interrupting transformer magnetizing and line charging currents. The arc restrictor consists of a tapered rod arranged with a latch so that it is subjected to a large deflection while the switch is opened. At a point in the opening operation when sufficient air gap has been established at the main contacts, the horn is released from the latch and travels at a very high speed, whipping out the arc. The need for very high contact speed comes about from the race between the rise of restored voltage across the contacts and the buildup of dielectric strength after current zero. If sufficient speed is attained, arcing will persist only until the first time the current in its 0-cycle excursions passes through zero. Thereafter, the moving arc restrictor contact builds up a gap of un-ionized air establishing a dielectric strength that will exceed the rise in recovery voltage so that arcing cannot recur.

Veloci-Whip Interrupter The Veloci-Whip Interrupter is an air switch attachment used to interrupt transformer magnetizing and line charging current. The Veloci-Whip is a spring-loaded high-speed whip interrupter. The enclosed spring stores energy to allow the whip to travel at a much higher rate of speed once released form the whip latch. The protective rubber boot dampens the vibration and whipping action to avoid any re-entry into the arc zone thus avoiding the opportunity for re-strike. The beryllium copper whip eliminates any curvature set over an extensive number of operations.

Because of the rapid arc extinction, switches (except the “DRV”& “FAS-2V”) equipped with the Arc Restrictor or Veloci- Whip can be mounted on disconnect phase spacing rather than horn gap phase spacing. Arc restrictors and Veloci-Whips can be mounted on vertical break or single or double side break switches. In the case of a double side break switch, two shorter rods are used, one for each separable contact.

6

Interrupting Attachments

Vacuum Interrupters Full Load Vacuum Interrupters Vacuum Interrupters are offered in (3) basic

configurations and can be attached to vertical break and side break switch designs. The configurations are as follows: A) Loop or Parallel Break – Normally these are

single vacuum contact devices, which can interrupt up to 2000 Amps, up to 230 kV, under paralleled conditions.

B) Line/Bus charging/line sectionalizing interruption/transformer magnetizing current interruption: A full voltage multiple stack interrupter may be utilized from 15kV through 230 kV for interruption of line bus charging currents and transformer magnetizing currents up to a value of 70 Amps at 0% power factor, capacitive or inductive. C) Full voltage multiple stack interrupter may be applied from 15 kV through 230 kV for interruption of actual load current at 70% power factor.

The interrupter carries load current only during the interruption. There is no external arcing, thus permitting the switch to be mounted on disconnect phase spacing. The vacuum interrupter is available for use with the type TTR8 and TTR6 vertical break switch, 38 kV through 242 kV and the type A7 single side break, 38 kV through 72.5 kV. Table 6

Summary of Interrupting Devices and Ratings

Velico-Whip High Speed Whip Line Charging or Magnetizing Currents Amperes

Vacuum Interrupter

Arcing Horns

Arc Restrictors

Ratings, kV

Maximum Permissible Arc Reach

Currents W/ Max. Permissible

Currents W/ Max. 2 ft. Arc Reach

Line Charging or Magnetizing Currents

Apprx. Charging Current

Phase Spacing (All Switches)

Maximum Design Nominal

Amperes per Mile of Line

Inches

Feet

Amperes

Amperes

Amperes

BIL

8.3

7.2

95

36 36 48 60 72 84

2 2 3 4 5 6 8 9

20 18 14 12 11

20 18 13

23 23 23 23 23 16 10

25 25 25 25 25 20 15 15 10

1/4 1/4 1/4 1/4 1/4 1/4 1/3 1/2 1/2 2/3 2/3

15.5

14.4

110 150 200 250 350 550 650 750 900

27 38

23

34.5

9 7 4 3 2 2 1 1 1 1

48.3 72.5 123 145 170 245 245 362 362

46 69

9 8 7 7 5 5 4 4

115 138 161 230 230 345 345

120 144 168 192 216 216 240

8 6

10 12 13 13 15

0.5

1050 1050 1300

1 1

7

Switch Operating Mechanisms - Electrical MO-10 Motor Operator

The MO-10 is an aluminum housed, partial revolution motor operator for actuating switches with either direct or offset torsional controls. Typical applications include remote operation of air-break disconnect switches, operation through supervisory control, or in conjunction with automatic transfer or sectionalizing schemes, or in combination with high- speed grounding switches for automatic isolation of transformer faults. The MO-10 is available with a wide range of torques and operating speeds as shown in Table 9. The voltage supply may be dc (24, 48, 125, and 250) or ac (120, 240). Because of this range of operating torque, the MO-10 may be used with Pascor Atlantic switches rated 8.3 thru 800 kV. Manual Operation The MO-10 may be manually operated by inserting the handle through the access port of the gear cover. To insert the handle, the Manual Operation Disconnect Lever must be moved to the side which electrically disconnects both motor and control circuits. Manual operation is through a 62:1 worm gear on 375:1 and 594:1 motor operators and through an 80:1 worm gear on 760:1 motor operators. Motors and Gear Drives The MO-10 motor operator is available in a variety of combinations of motors and connecting gear drive ratios see Table 8 & 9. The standard dc motor unit is rated ¾ hp, 1750 rpm and includes a 375:1 gear drive. For AC applications, the motor circuit utilizes a rectifier to convert the AC input to DC. Dynamic Braking is accomplished through a braking resistor in the DC motor circuit. Other combinations of motor rating and gear drive assemblies are tailored to satisfy specific output torque and/or speed requirements. All motors have high starting and running torques at minimum IEEE voltages, are sealed against moisture, dust and fumes, and require no lubrication. The motor circuits are protected by class cc fuses, which permit locked armature current flow for a short period.

8

Switch Operating Mechanisms - Electrical

MO-10 NG Design Features

Overview The MO-10NG motor operator is a state of the art design utilizing Programmable Logic Controllers (PLC) to provide a variety of configurable options. A Human Machine Interface (HMI) screen provides reliable, secure and straightforward configuration of the MO-10NG. The MO-10NG includes a wide range of functions that can be configured prior to shipment or in the field through the menu screen of the HMI. The features include:

x Voltage Options of 24, 48, 125 & 250 VDC and 120, 240 VAC x Pushbuttons (Open, Close and Stop) x Local and/or Remote operation x Operation time delay and counter x Six custom outputs x Positive electro-mechanical Open and Close limit switches

x Open and Close speed control x Watch Dog condition monitoring

Open and Close Speed Control EHV disconnect switches can exhibit blade bounce at the end of an open or close operation due to the length of the blade and operating time of traditional motor operators. The MO-10 NG code incorporates a speed control menu that allows for four separate open and close sectors that are variable in duration. Motor speed can be set between 5 and 100% in each of the sectors. Utilizing the variable sectors and range of motor speed allows for control of the switch blade throughout its travel and virtually eliminates blade bounce. Watch Dog Condition Monitoring Condition monitoring is achieved by capturing motor current and operating time measurements. Once the MO-10NG and associated disconnect switch have been adjusted, the motor current and operating time can be archived. All subsequent operations are then compared to the archive data. A trending screen is also incorporated on the HMI screen which shows the last open and close operation as well as the motor current. Increases in the motor current and operating time are key indicators that a switch requires maintenance. The data obtained can be easily downloaded from a USB port on the HMI. In addition to the motor current and operating time the date and time of each operation is also recorded. Once saved to a flash drive, the data can easily be imported into an Excel spreadsheet.

1

HMI Home Screen

HMI Operations Screen

9

Switch Operating Mechanisms - Electrical

Table 7 – Motor Mechanism Selection

Switch 15 - 345 kV Motor Mechanism Item

8.3 - 170 kV (except 1000 A TTR6 Vertical) 15 - 345 kV 4000 A TTR6 Vertical Break

1,4

2

2

245 - 362 kV

3

550 kV Vertical Break

362 kV TTR8

6

362-500 kV Multi Rev

7

Table 8 – Technical Data, Mechanism

Oper. Time 190° Travel Seconds Normal Service Conditions

Vertical Operating Pipe

Motor Mechanism Item

Motor

Torque In-lb

Gear Ratio

HP

RPM

SPS Min.

Feet Max.

2

30 60 30 60 30 60 30 60

3450

22,000

375:1

3.4

4

3/4

2 1/2

2

3450

30,000

594:1

5.4

5

3/4

2 1/2

2

6.8

1750

22,000

375:1

1

3/4

2 1/2

2

10.8

1750

30,000

594:1

2

3/4

2 1/2

3

34,000

13.7

3 x HVY

20

1750

760:1

3/4

2

30 60 30 60

6

30,000 3/4

1750

760:1

13.7

2 1/2

2

7

8,000

3/4

3450

48:1

14.0

2 1/2

Table 9 – Technical Data, Motor

Current, Amperes

Operating Voltage Range

1750 3450 1750 3450 1750 3450 1750 3450 Rated Speed

Fuse Size Type CC Time Delay

Rated Voltage

Rated HP

Locked Armature

Rated RPM

3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4

30 30 14 14

211 306 106 203

30 30 30 30 10 10

24

20-28

48

36-56

DC

5 6 3 3

42 61 25 35

125

90-140

6 6

250

180-280

10

Switch Operating Mechanisms – Manual

Description A switch operating mechanism is a means for opening or closing a group operated air switch and occasionally a single pole switch, from a fixed position, usually at ground level. Forces are transmitted from the operator’s position to the moving parts of the switch. The two most commonly used operators are torsional (swing handle) and worm gear types. Swing Handle The swing handle is a manually operated torsional mechanism, which is hinged to the vertical operating pipe. Two lengths of handles are available. A three-foot handle and a five-foot telescopic handle. The swing handle is actuated by raising the handle to a position parallel to the ground followed by a direct horizontal lever action applied to rotate the vertical operating pipe. The three-foot handle is used primarily for switches rated 8.25 thru 72.5 kV. The five-foot handle is used for lower voltages where additional operating effort is required by accessories or for higher voltage switches 121 thru 170 kV.

Worm Gear The worm gear is a manually operated torsional mechanism. It is recommended for operating tree-pole switches requiring increased operating effort depending on switch type, ratings and interrupter attachments. The worm gear is a corrosion free mechanism consisting of a 15-inch crank handle and weather sealed gearbox. It is available in gear ratios of 46:1, 62:1, 80:1 and is especially designed to prevent backlash.

Three-Pole Torsional Control Operating Mechanism

A three-pole torsional control can be activated by a simple swing handle, a worm gear or a motor operator depending on torque required. Offset Bearing Same as the switch bearing with two sets of stainless steel ball bearings, weather-sealed and maintenance free. Multi-Angle Crank Switch and controls can be relocated to different structures and different offset angle with no change in parts.

1 0

11

Accessories

Grounding Switches

FAS-GRD, AG7 and AG8 grounding switches can be applied on either the hinge or jaw end of most switches for grounding lines on equipment during inspection, maintenance, or repair. The 3- pole grounding switch is frequently interlocked with the main switch on which it is mounted, to prevent both switches from being closed at the same time. Grounding switches can also be supplied with their own separate base and insulator stack rather than attached to a disconnect switch. Grounding switches must be designed, built and tested to withstand the rigors of associated equipment, high momentary ratings, ice-breaking ability, and wind-loading resistance.

High-Speed Grounding Switches (Automatic)

Automatic high-speed grounding switches provide the most economical means of transformer protection. Their application has become well accepted at the result of the excellent reliability of modern transformers, extremely fast relay and circuit breaker operation, and last but not least, dependable design. The purpose of the high-speed grounding switch (HSG) is to create deliberate fault upon a signal from the protective relays of the faulted transformer. Fault current relays trip the remote circuit breaker. With high speed components used in the scheme, a transformer is de-energized with a few cycles after it develops an internal fault, thus limiting costly transformer damage. Since the HSG is a fault-initiating device, it is normally supplied for single pole operation; however, 3-pole operation can also be supplied. It can be reset with either a hook stick or an operating handle at ground level.

The HSG switch can be supplied in these forms: x On any non-rotating insulator of any switch. x As a complete unit with its own base and insulator.

12

Accessories

Cable Guides (Outriggers)

Auxiliary Switch

The frequent need for remote switch position indication, electrical interlocking of main and ground switches with each other or with breaker controls and other operating sequences, requires the application of auxiliary switch units to switch operating mechanisms. These separately mounted devices are available in multi-stage circuits from 2 thru 16, in multiples of two stages. Auxiliary switches are totally enclosed in weatherproof housings, which provide entrance openings for termination of conduit.

Cable guides or outriggers are fabricated of either extruded T-sections or tubular bus. Both versions are high conductivity aluminum and bolt directly to the switch terminal pad, on either the hinge or the jaw end. The outer end of the outrigger has a NEMA standard 4-hole terminal drilling. Cable guides are used to support the cables well away from the switch base and grounded parts. They are designed for a 100-pound maximum downward force at their outer end. Standard lengths are 2, 3, and 4 feet from insulator centerline to the outer end of the cable guide.

EHV Controls

The GTS is a superior design to other operating mechanisms for EHV switches that will reduce your crew time and dramatically decrease overall project costs. The GTS is a design concept that has been accepted in the air disconnect market for 50 years. A 65% parts reduction results in greatly reduced assembly and adjustment time. It will operate switches up to 500kV and 5000 amps. The GTS has been through rigorous mechanical operational tests enduring over a 4-month period and performed more than 5,000 operations. The GTS is a multi-revolution design with an operation time of 14 seconds. The drive insulator rotates on a maintenance free 30:1 worm gear rotor bearing assembly (Figure 1). The housing is comprised of high strength aluminum alloy castings including three sets of stainless steel bearings. A 1:1 ratio type “T” gearbox is used to transfer the vertical load to a horizontal load. The gearbox is constructed of stainless steel shafts enclosed in an aluminum housing (Figure 2). Interphase shafts connect to the rotor bearing under each pole. The heavy duty coupling (Figure 3) is designed to simplify the adjustment process. Each pole is symmetrical which allows the operator to be mounted on any of the 3 phases. The GTS is a competitive product and is another example of how Pascor Atlantic responds to customer needs. It is recognized that crew installation time is a substantial cost to an overall project. The GTS in actuality reduces budgeted installation and adjustment time by 50%.

Figure 1

Figure 2

Figure 3

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Testing

At Pascor Atlantic we test beyond IEEE requirements, from mechanical testing, electrical testing, and environmental testing we exceed the standard. In house, we have the capabilities of conducting various tests. Temperature Limitation can be tested in house, measured through thermocouples and collected for reports. Mechanical Operation tests are administered and exceed the recommended 1000 operations with greater than 10% of those with terminal loading per IEEE standards. Environmental Testing such as ice, wind and contamination are conducted and the results are recorded in every test report where applicable.

Other testing such as Seismic, Dielectric and Short- Circuit, that is beyond our capabilities is tested at various third party labs and results observed by and reported directly to Pascor Atlantic.

Rest assure that every switch produced at the factory is tested for operation and resistance and recorded for that specific order. Every Motor Operator is tested for operation and function prior to shipment and recorded for that unique design.

14

Delivering More... Delivering Service

Pascor Atlantic Air Switch Division – State Route 42

254 Industry Drive – Bland, Virginia 24315-9709 Phone: 276-688-3328 – Fax: 276-688-2228 or 2229 www.pascoratlantic.com

This bulletin describes our standard product and does not show variations in design, which may be available. If additional details are required, contact your local Pascor Atlantic representative. Pascor Atlantic reserves the right to make changes and improvements to the products shown in this bulletin without notice or obligation.

SepteMber 2009 Db-A7-A

A galvanized structural steel channel base supports the insulators and live parts. The

switch is designed to enhance the electrical and mechanical characteristics of current

carrying parts. The mechanical parts and rotor bearings are designed for durability to withstand

cantilever stresses, ensuring long-lasting service in all types of environments. All parts have been

designed to be uniform across the product line. As a result, parts are easier to stock and are more readily available from the factory.

Side-Break Outdoor Air Disconnect Switch

Description The A7 switch is a modern and reliable two-insulator, side-break, outdoor air switch using a variety of materials in its design selected to do a specific job according to the function required.

Optimum mechanical and electrical characteristics of the current carrying parts are assured through the use of high-conductivity, high-strength aluminum alloys combined with transfer contacts utilizing the time proven high-pressure, silver-to-copper construction. Throughout the current path all bolts, nuts, and pins are stainless steel, minimizing the possibility of corrosion.

8.25 thru 145 kv 600-1600A Type A7 40-70 kA Momentary

- momentary rating

- location and position

- coil voltage (for HSG only) - BIL rating

- technical reference (TR #) - bolt circle diameter

OPErAtOrS

The A7 can be operated either manually or by a motor mechanism. Below is a list of operators which can be supplied: Swing Handle Worm Gear MO-10 Motor Operator GrOunDInG SwItch

For grounding during inspection, maintenance, or repair, a threepole grounding switch can be mounted on the hinge and/or jaw end of the A7. Interlocking to prevent

the main and ground switches from being closed at the same time can be accomplished via Kirk key interlocks, mechanical interlocks, or electrical interlocks (where electrical operators are used).

High speed grounding switches for fault initiating can also be mounted on the A7. High speed grounding switches can be reset by using a hookstick or one of the operators listed above. OrDErInG InfOrMAtIOn:

The following information is the minimum required when ordering A7 side-break switches:

Voltage, BIL rating, continuous current, momentary rating Mounting positions (upright, vertical, or inverted) If grounding switches are specified:

Operators required (main and ground switches) Insulator specification including: Mounting information Structure and detail drawings

Fixed terminal pad height if applicable

Pascor Atlantic

www.pascoratlantic.com

Air Switch Division • State Route 42

254 Industry Dr. • Bland, Virginia 24315-9709

customized lengths

threepole switches

contacts

Phone: 276-688-3328 • Fax:276-688-2228 or 2229

This bulletin describes our standard product and does not show variations in design which may be available. If additional details are required, contact your local Pascor Atlantic representative. Pascor Atlantic reserves the right to make changes or improvements to the product shown in this bulletin without notice or obligation.

A7 vAlue-ADDeD feAtureS Pascor Atlantic’s A7 switch is the result of 100 years’ experience in developing and supplying power equipment to the electric utility industry. Pascor Atlantic has continuously pioneered

the research, design, testing and the manufacture of outdoor disconnect switches. We maintain this leadership because of our continued innovative efforts to provide maximum value in acquisition, installation, maintenance and operating reliability. Procurement: Local sales representatives and expertise Pre-engineered controls available for quick delivery ISO 9002 certified ISO 14000 compliant On-time shipment Industry’s shortest lead times Engineering:

Universal base and control fit most structures All parts designed to resist corrosion Adaptability to meet special requirements Availability of AutoCAD format drawings Manual and motor operation Installation:

Interphase and vertical operating pipes in pre-engineered or Adjustable threaded clevis for ease of fine adjustment of Open-close stops on each switch pole Service technicians available for assistance On-time deliveries Maintenance:

Greaseless rotor bearings with stainless steel ball bearings on switch bases Weather-sealed, grease-filled enclosed switch hinge Corrosion-free gears in all operators No threaded coupling applied in torsion Replaceable copper moving contacts Accessories:

The following accessories can be provided for the A7: Arc Restrictors thru 145 kV (Quick Whips) Vacuum Interrupters Auxiliary Switches Cable Guides (Outriggers) Spill Gaps Leveling Screws (Jacking Bolts) Arcing Horn Position Indicators Silver-to-Silver Open Air Contacts

rotor beAringS Switch bASeS

stainless steel ball bearings

housing

2. Type 18-8

3. Adjusting and take-up nut

1. One-piece,

high-strength,

cast aluminum alloy

A7 SpecificAtionS

4. Galvanized forged-steel rotor

Switch bases of galvanized structural steel channel are designed and tested to

be rigid under all operating conditions. Heavy galvanizing is applied after

punching to assure long corrosion-free life. Universal bases are available for all

switch types. This base allows for infinite mounting bracket locationwhich assures mounting holes will match without the need for field modification.

Switch Bases far enough apart to provide sufficient support to withstand cantilever stresses

rotor Bearings The drive insulator stack rotates on a greaseless rotor bearing that contains

two sets of stainless steel ball bearings. Weather seals prevent moisture and

foreign matter from entering the rotor bearing. The ball bearing sets are spaced

and to allow the ball races to take thrust loading as well as radial loading. This

design assures smooth operation and minimized operating effort. Because of this design, no maintenance is required, ever.

hinge ASSeMbly jAw ASSeMbly

Jaw contacts The jaw consists of tinned, hard drawn reverse loop copper jaw fingers backed by stainless steel springs to provide excellent current carrying capability and resistance to corrosion. The stainless steel springs

are insulated at one end to eliminate current flow through the spring and thus prevent annealing. This design prolongs the life of the spring and ensures consistent contact pressure.

The reverse loop finger design of the jaw contact assures that the contacts will stay engaged under fault conditions. Magnetic forces from the fault current tend to push the blade deeper into the jaw rather than up, out of the jaw. Consequently, the blade will not be driven from the jaw due to magnetic forces from fault conditions, preventing damage to the switch and any adjacent construction.

The blade contact end consists of a replaceable silver-plated copper bar bolted to the blade end.

The contact end is easily replaced in the field by removing a few bolts thereby reducing the amount of downtime.

The blade contact of an A7 switch is a tinned copper bar with silver-plated contact surfaces and is hinged to the blade to provide toggle action. The contact head of the blade is made so that it can pivot through a 15-degree arc as the blade enters or leave the jaw contacts. This blade toggle is designed to reduce operating effort, particularly on opening. The pivoting action allows movement to take place between one pair of contacts at a time, changing the static friction to sliding friction. The transfer of current from the blade contact to the blade is accomplished with the high-pressure hinge contact at the toggle joint with constant pressure maintained by stainless-steel spring washers.

ApplicAtion Type A7 side-break switches meet or exceed ANSI C37 and IEC 129 standards and are adaptable to substation and line applications. They may be applied for any conventional

Type A7 switches can be mounted in upright, inverted or vertical positions. Sealed Pressure hinge contacts

Mounting requirements such as main line disconnecting, bus sectionalizing, breaker isolating and by-passing, or transformer disconnecting. They are also capable of interrupting line-charging and transformer-magnetizing current when equipped with interrupting attachments.

A7 DeSign feAtureS AnD benefitS

The A7 switch is backed by years of a solid reputation and proven dependable service life in all types of climates and conditions. The transfer of the current from the copper

hinge to the aluminum hinge terminal casting is through a spring-loaded hinge pin threaded into the tinned copper swivel terminal. The hinge pin is tin-plated copper with

silver-plated threads. A stainless-steel pressure spring provides positive continuous contact between the threads. A specially designed stainless-steel tapered insert expands

the slotted hinge pin, applying a high radial force to engage the tinned surface of the hinge pin with the properly prepared surface of the aluminum hinge terminal casting,

thus providing a reliable current transfer. Neoprene O-ring seals protect the contacts from dust, dirt, and moisture. The seal-in lubrication is effective for the life of the switch.

septeMber 2009 Db-Dr-7-A

A galvanized structural steel channel base supports the insulators and live parts. The

switch is designed to enhance the electrical and mechanical characteristics of current

carrying parts. The mechanical parts and rotor bearings are designed for durability to withstand

cantilever stresses, ensuring long-lasting service in all types of environments. All parts have been

designed to be uniform across the product line. As a result, parts are easier to stock and are more readily available from the factory.

Center-Break Outdoor Air Disconnect Switch

69 thru 362 kv 3000A Type DR7 40-120 kA Momentary

Description The DR7 switch is a modern and reliable two- insulator, centerbreak, outdoor air switch using a variety of materials in its design selected to do a specific job according to the function required.

Optimum mechanical and electrical characteristics of the current carrying parts are assured through the use of high-conductivity, high-strength aluminum alloys combined with transfer contacts utilizing the time proven high-pressure, silver-to-copper construction.

Throughout the current path all bolts, nuts, and pins are stainless steel, minimizing the possibility of corrosion.

rating

The DR7 can be operated either manually or by a motor mechanism. Below is a list of operators which can be supplied: Swing Handle Worm Gear MO-10 Motor Operator GrOunDInG SwItCh

The following information is the minimum required when ordering DR7 center-break switches: Voltage, BIL rating, continuous current, momentary Mounting positions (upright, vertical, or inverted) If grounding switches are specified: - momentary rating - location and position - coil voltage (for HSG only)

Operators required (main and ground switches) Insulator specification including: - BIL rating - technical reference (TR #) - bolt circle diameter Mounting information Structure and detail drawings

Fixed terminal pad height if applicable

OPErAtOrS

For grounding during inspection, maintenance, or repair, a threepole grounding switch can be mounted on the hinge and/or jaw end of the DR7. Interlocking to prevent

the main and ground switches from being closed at the same time can be accomplished via Kirk key interlocks, mechanical interlocks, or electrical interlocks (where electrical operators are used).

High speed grounding switches for fault initiating can also be mounted on the DR7. High speed grounding switches can be reset by using a hookstick or one of the operators listed above. OrDErInG InfOrMAtIOn:

Pascor Atlantic

www.pascoratlantic.com

Air Switch Division • State Route 42

254 Industry Dr. • Bland, Virginia 24315-9709

or customized lengths

of threepole switches

switch bases

Phone: 276-688-3328 • Fax:276-688-2228 or 2229

Interphase and vertical operating pipes in pre-engineered Adjustable threaded clevis for ease of fine adjustment Open-close stops on each switch pole Service technicians available for assistance On-time deliveries Maintenance:

Greaseless rotor bearings with stainless steel ball bearings on Weather-sealed, grease-filled enclosed switch hinge contacts Corrosion-free gears in all operators No threaded coupling applied in torsion Replaceable copper moving contacts Accessories:

The following accessories can be provided for the DR7: Arc Restrictors thru 145 kV (Quick Whips) Auxiliary Switches Cable Guides (Outriggers) Spill Gaps Leveling Screws (Jacking Bolts) Position Indicators Silver-to-Silver Open Air Contacts

This bulletin describes our standard product and does not show variations in design which may be available. If additional details are required, contact your local Pascor Atlantic representative. Pascor Atlantic reserves the right to make changes or improvements to the product shown in this bulletin without notice or obligation.

Dr7 vAlue-ADDeD feAtures Pascor Atlantic’s DR7 switch is the result of 100 years’ experience in developing and supplying power equipment to the electric utility industry. Pascor Atlantic has continuously pioneered

the research, design, testing and the manufacture of outdoor disconnect switches. We maintain this leadership because of our continued innovative efforts to provide maximum value in acquisition, installation, maintenance and operating reliability. Procurement: Local sales representatives and expertise Pre-engineered controls available for quick delivery ISO 9002 certified ISO 14000 compliant On-time shipment Industry’s shortest lead times Engineering:

Universal base and control fit most structures All parts designed to resist corrosion Adaptability to meet special requirements Availability of AutoCAD format drawings Manual and motor operation Installation: