S&C Vista SD, Operation Manual

Page 1: ...Style 11 Pad Mounted Style 12 Closing the Doors and the Hinged Roof 14 Resetting Visi Gap Fault Interrupters All Styles 15 Locking in Open or Closed Position 17 Checking for Voltage Using the Optional...

Page 2: ...tallation and operation of S C Vista SD Underground Distribution Switchgear are included in the Installation and Operation Information Kit provided with each switchgear assembly A catalog dimensional...

Page 3: ...rise to the immediate purchaser s or end user s claim All other warranties whether express or implied or arising by operation of law course of dealing usage of trade or otherwise are excluded The onl...

Page 4: ...recommended precautions are not followed NOTICE NOTICE identifies important procedures or requirements that can result in product or property damage if instructions are not followed Following Safety I...

Page 5: ...ents Live G 6700 C WARNING Do Not Block Pressure Relief Device not visible G 6742 D WARNING Before Using Voltage Tester Always Test for Proper Operation G 9451 Figure 1 Location of Safety Labels Model...

Page 6: ...C WARNING Do Not Block Pressure Relief Device not visible G 6742 D WARNING Before Using Voltage Tester Always Test for Proper Operation G 9451 Figure 2 Location of Safety Labels Model 321 3 way vault...

Page 7: ...e Using Voltage Tester Always Test for Proper Operation G 9451 E WARNING Keep Out Hazardous Voltage Inside G 6398 Figure 3 Location of Safety Labels Model 321 3 way pad mounted style unit shown E E WA...

Page 8: ...oor The use of undue force may damage the door latching mechanism 7 Safety Labels Do not remove or obscure any of the DANGER WARNING CAUTION or NOTICE labels 8 Energized Bushings Always assume the bus...

Page 9: ...y using a piece of rope attached to the manual handle or by a user furnished universal pole of the appropriate length equipped with a standard fitting Opening and closing speed of the vacuum interrupt...

Page 10: ...otential indication feature optional 600 A bushing adapters are field replaceable Ground bus optional Parking stands optional Operating mechanism CT Figure 5 S C Vista SD switchgear has the features a...

Page 11: ...To open the load interrupter switch or fault interrupter rotate handle counterclockwise b To close the load interrupter switch or fault interrupter rotate handle clockwise The manual operating handle...

Page 12: ...could result in personal injury STEP 4 To gain access to the termination compartment lift the latch handle to open the right side door or the center door See Figure 12 a Open the door far enough to p...

Page 13: ...ter rotate the handle clockwise The manual operating handle may be operated from a variety of locations using a rope a shotgun stick or by hand illustrated a b Figure14 Rotatetheoperatinghandleguideri...

Page 14: ...hinged roof to sag against the hold open mechanism At the other end of the enclosure push up on the hinged roof just enough to allow that hold open mechanismlatchtobereleased Lower the hinged roof int...

Page 15: ...and without hesitation all the way to the stops to reset the fault interrupter See Figure 22 a b Figure 22 Resetting the fault interrupter after a fault a vault mounted style b pad mounted style STEP...

Page 16: ...r a vault mounted style b pad mounted style STEP 8 Check the POSITION indicators to confirm the fault interrupter is closed See Figure 26 Figure 26 The POSITION indicator after the fault interrupter h...

Page 17: ...b Locked closed Figure 28 The loadinterrupter switches or fault interrupters may be padlocked in either position To prevent operation of a load interrupter switch or fault inter rupter insert a padlo...

Page 18: ...f the operating mechanism front panel around the Potential Indication feature Petro leum based solvents should not be used on or around Vista SD Underground Distribution Switchgear STEP 2 Unscrew the...

Page 19: ...e phased as follows a Set the voltmeter for volts ac b Connect one of the test probes of the voltmeter to the Neutral Jack of the way to be phased c Placetheothertestprobeoneachofthetestjacks in turn...

Page 20: ...ng different phases of the two ways the voltage should be 1 7 to 2 times the phase to neutral voltage measured in Step 3 See Figure 32 b d Keep the test probe on Test Jack 1 of the first way and move...

Page 21: ...ters from all power sources including backfeed test for volt age and properly ground 4 Always assume the bushings are energized unless proved otherwise by test or by visual evidence of an Open Circuit...

Page 22: ...olive green finish 9991363 493 for seafoam green 9991363 488 for equipment green and 9999 061 for red oxide primer See Figure 34 No other finish or primer is approved The area to be touched up should...

Page 23: ...ut opening the latch The following procedure describes how to open the switchgear enclosure and replace the shear pin Tools Required Needle nose pliers Slotted flathead screwdriver Parts Required Shea...

Page 24: ...360 STEP 9 Close and secure the hinged roof per the instruc tions in Closing the Doors and the Hinged Roof on Page 14 Closing and Securing the Enclosure if Replacement Shear Pin is Unavailable If the...

Page 25: ...c withstand tests The presence of these values does not imply a dc withstand rating or performance requirements for the switchgear A dc withstand design test is specified for new equipment because the...

Page 26: ...switchgear can be increased to the dc cable test voltage Very Low Frequency VLF Cable Testing IEEE Standard 400 2 IEEE Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency...

Page 27: ...ned Follow the recom mendations provided by the manufacturer of the VLF test equipment Follow the user s operating and safety proce dures for grounding the cable connecting the VLF test source isolati...

Page 28: ...nterrupt rated current Table 5 Vista Gap Load Interrupter Switch Ratings Applicable Standard Freq Hertz Visi Gap Load Interrupter Switches Voltage kV Amperes Nom Max BIL Continuous Load Dropping and L...

Page 29: ...on top Mild steel mounting stand V2 110 101 303 312 321 330 404 413 422 431 440 505 514 523 532 541 550 606 615 624 633 642 651 660 Stainless steel mounting stand V12 110 101 303 312 321 330 404 413 4...

Page 30: ...541 550 606 615 624 633 642 651 660 Stainless steel 6 inches K17 210 201 303 312 321 330 404 413 422 431 440 505 514 523 532 541 550 606 615 624 633 642 651 660 12 inches K18 210 201 303 312 321 330 4...

Page 31: ...ntinuous ground bus Connects to all load interrupter switches and fault interrupters provides a convenient location to attach cable concentric neutrals separable connector drain wires and user provide...

Page 32: ...rip signal from a remote location or an external relay Requires a user furnished 220 240 Vac 50 60 Hz control power source In addition to standard overcurrent control for all fault interrupters R33 10...

Page 33: ...control For connecting a control to a user furnished personal computer in the field For personal computers having a 25 pin serial communication port TA 2366 For personal computers having a 9 pin seria...

Page 34: ...S C equipment green outdoor finish 9991363 488 S C red oxide primer 9999 061 Table 13 Auxiliary Contacts Receptacle Connector Pin Function A n c B Vacuum interrupter closed NO C Vacuum interrupter cl...

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