Westinghouse Transfer Switch EquipmentSol id State Logic Our next-generation Solid State Logic

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Westinghouse Electric CorpAutomatic Transfer Switch

Voltage Sensing CardStyle Number 7820C97GOl

111evoltage sensing card is a very versatile sensing card which may be used with aWestínghouse Transfer Switch. The card may be used as a replacement for oldcrversions of the voltage sensing card in existing equipment,

The card may be "programmed" to perform either undervoItage, or overvoltagesensing, on single or three phase applications.

Programrning of the card is accomplished by positioning j umpers on the positíonslabeled J 1 through J7 on the board itself. This alJows easy modification of the cardat the users' discretion. Both function and the pickup and dropout values may beeasily changed by folIowing the instructions provided.

Cards shipped from the factory are prograrnmed to the users' original specification,or to the standard pickup and dropout values as follows:

FunctionUndervo] la geOvervoltage

Pickup90%110%

Dropout80%115%

Programmíng the Card

Reprogramming of the card may be accomplished by using the attachcd.instructions.

It is recommended that you removeALL jumpers from J1 through J7. As suppliedfrorn the factory there are cnough j umpers to program the card for either function,and value.

The card may be programmed for either UNDERVOLTAGE or OVERVOLTAGE,but NOT 80TH!! To attempt to program the card for both voltage sensingfunctions WILL CAUSE THE CARO TO MALFUNCTION, AND POSSIBLYDAMAGE THE ELECTRONICS ON THE CARD !!! .

·Undervoltage Programmíng1. Place a jumperon J6

2. Insure that there IS NOTa jumper on J7

q. Choose the desired pickup and dropout values from TABLE 1, and placejumpers on the pins indicated.

4. For THREE phase sensing place jumper on J1 (see CAUTION below)

Table 1Undervoltage Pickup and Dropout

85 80757065

JumpersJ2J2,J4J2,J5J2,J4,J5

J3J3,J4J3,J5J3,J4,J5

J2,J3J2,J3,J4J2,~3,J5J2,J3,J4,J5

Pickup (%)95

Dropout (0/0)90858075

90 85807570

CAUTION:

If the card is to be used for THREEPHASE senslng, you must Insure that thesensing position (Normal or Emergency) is fed by a three phase transformerpackage.On three phase units sold by Westinghouse; the standard is threephase s~nsing on NORMAL,and single phase sensing on EMERGENCY.

THREEPHASE SENSING ON EMERGENCYrs AVAILABLE ONLY AS A FACTORYINSTALLEDOPTION. If in doubt, contact the factory for assistance.

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Overvoltage Programmíng1. Place a jumper on J7

2. Insure that there IS NOT a jumper on J6

3. Choose the desired pickup and dropout values from TABLE 1, and placejumpers on the indicated pins.

4. For THREE PHASE sensing place a [urnper on J1 (See CAUTION below)

Table 2Overvoltage Pickup and Dropout

115

Dropout (%) Jumpers

110 none115 J4120 J5125 J4,J5

115 J2120 J2,J4125 J2,J5130 J2,J4,J5

120 J3125 J3,J4130 J3,J5135 J3,J4,J5

125 J2,J3130 J2,J3,J4135 J2,J3:J5140 J2,J3,J4,J5

Pickup (0/0)

105

110

120

CAUTION:

If the card is to be used tor THREE PHASE sensing,y:ou must insure that thesensing position (Normal or Emergency) is fed by a three phase transtorrnerpackage. On three phase units sold by Westínghouse, the standard is threephase sensing on NORMAL, and single phase sensing on EMERGENCY.

,'.: ...•..THAEE PHASE SENSING ON EMERGENCY IS AVAILABLE ONLY AS A FACTOAYINSTALLED OPTJON. If in doubt, contact the factory for asslstarce.

Table 5Nominal System Voltages

120 208 220 240 380 415 480 600

65% 78 135 143 156 247 270 312 39070% 84 146 154 168 266 291 336 42075% 90 156 165 180 285 311 360 45080% 96 166 176 192 304 332 384 480 StdUV Dropout85% 102 177 187 204 323 353 408 51090% 108 187 198 216 342 374 432 540 Std.UV Pickup95% 114 198 209 228 361 394 456 570100% 120 208 220 240 380 415 480 600105% 126 218 . 231 252 399 435 504 630110% 132 229 242 264 418 457 528 660 Std.OV Pickup115% 138 239 253 276 437 477 552 690 Std.OV Dropout120% 144 249 _264 288 456 498 576 720125% 150 260 275 300 475 519 600 750130% 156 270 286 312 494 540 624 780135% 162 281 297 324 513 560 648 810

)TANDRRO SENSING CRRO PROGRRMMING

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VOLTRGE SENSING CRRD

UV PU - 90%~~~~~~~

1 Phase UV UV DO 80%-J1 J7

U\IPU - 90%~~~~~~~

3 Phase UV UV DO 80%-J1 J7

OV PU - 110%~~~~~~~

1 Phase OV OV DO 115%-J1 J7

OV PU - 110% .~~~~~~~

3 Phase OV OV DO f15%-. - ¡J1 J7

COMBINRTION SENSING CRRD --

UV PU = 90%

~~~~~~~~~~~~1 Phase UV DO = 80%uv/ur r PU = 58Hzr DO = 56Hz J1 J12UV PU = 90%

~~~~~~~~~~~~3 Ph as e

UV DO = 80%uv-ur r PU = 58Hzr DO = 56Hz J1 J12OV PU - 110% ~~~~I~~~~~~~,.

1 Phase ov/orOV DO = 115%". or PU = 62Hzor DO = 64Hz J1 J12OV PU - 110% ~~~~~~~m~~~OV DO - 115%3 Phase ov/oror PU - 62Hz

or DO - 64Hz J1 J12

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