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February 1, 2021
©  S&C Electric Company 2014-2021, all rights reserved

Instruction Sheet  695-505

Vista

®

 SD Underground Distribution Switchgear

Outdoor Distribution (17.5 kV and 29 kV)

With Visi-Gap

®

 Load-Interrupter 

Switches and Visi-Gap

®

Fault Interrupters

Installation

Table of Contents

Section  

Page

Section  

Page

Introduction

Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Read this Instruction Sheet  . . . . . . . . . . . . . . . . . . .  2
Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . .  2
Proper Application  . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Warranty Qualifications  . . . . . . . . . . . . . . . . . . . . . .  3

Safety Information

Understanding Safety-Alert Messages . . . . . . . . . . .  4
Following Safety Instructions . . . . . . . . . . . . . . . . . .  4
Replacement Instructions and Labels  . . . . . . . . . . .  4
Location of Safety Labels and Tags

Single-Way Vault-Mounted Style . . . . . . . . . . . . .  5

  Multi-Way Vault-Mounted Style . . . . . . . . . . . . . .  6
  Pad-Mounted Style  . . . . . . . . . . . . . . . . . . . . . . .  7

Safety Precautions

 . . . . . . . . . . . . . . . . . . . . . . . . .  8

Shipping and Handling

Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  9
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Installation

Vault-Mounted Style
  Switchgear Placement . . . . . . . . . . . . . . . . . . . . .12
  Single-Way Vault-Mounted Style Unit 
  Installed Through 31

½

-Inch Manhole  . . . . . . . . .13

 Cables  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
 Grounding 

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

  Fault Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Pad-Mounted Style
  Switchgear Placement . . . . . . . . . . . . . . . . . . . . .16
  Access to Interior . . . . . . . . . . . . . . . . . . . . . . . . .16
 Cables  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
  Attach Hinged-Roof Counterweights . . . . . . . . .  20
  Install Termination Compartment 
  Cover Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
 Grounding  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 
  Fault Indicators . . . . . . . . . . . . . . . . . . . . . . . . . .  22
  Closing the Doors and the Hinged Roof  . . . . . .  23
  Completing the Installation . . . . . . . . . . . . . . . . .  24

Appendix A

Routine Switchgear Testing . . . . . . . . . . . . . . . . . .  25
Dc Cable Testing and Fault Locating . . . . . . . . . . .  25
Very Low Frequency (VLF) Cable Testing . . . . . . .  26
Fault-Interrupter Testing . . . . . . . . . . . . . . . . . . . . .  27

Содержание Vista SD 101

Страница 1: ...Location of Safety Labels and Tags Single Way Vault Mounted Style 5 Multi Way Vault Mounted Style 6 Pad Mounted Style 7 Safety Precautions 8 Shipping and Handling Packing 9 Inspection 9 Handling 10 I...

Страница 2: ...hey are not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment Read this Instruction Sheet NOTICE Thoroughly and carefully read this instr...

Страница 3: ...d 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 only warranties are those stated in Price S...

Страница 4: ...cautions 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 Instructions If...

Страница 5: ...er Circuits and Components Live G 6700 C WARNING Do Not Block Pressure Relief Device not shown G 6742 D WARNING Voltage Tester Always Test for Proper Operation G 9451 Figure 1 Location of safety label...

Страница 6: ...d Components Live G 6700 C WARNING Do Not Block Pressure Relief Device not visible G 6742 D WARNING Voltage Tester Always Test for Proper Operation G 9451 Figure 2 Location of safety labels Model 312...

Страница 7: ...e G 6742 D WARNING 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 422 4 way pad mounted style unit s...

Страница 8: ...attempting to open a door 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...

Страница 9: ...ardboard Inspection Examine the shipment for external evidence of damage as soon after receipt as possible preferably before removal from the carrier s conveyance Check the bill of lading to make sure...

Страница 10: ...ble for two way and three way switchgear assemblies See Figure 4 and Figures 5 and 6 on page 11 STEP 2 Arrange the hoist slings to distribute lifting forces equally between the lifting tabs STEP 3 Avo...

Страница 11: ...on Sheet 695 505 11 Shipping and Handling Figure 6 Hoisting a pad mounted style Vista SD switchgear assembly multi way assembly shown Figure 5 Hoisting a multi way vault mounted style Vista SD switchg...

Страница 12: ...es mounted in the horizontal orientation catalog number suffix V3 the clearance between the back of the bus work and the floor of the vault is approximately inch 13 mm Be sure the floor beneath the sw...

Страница 13: ...switchgear assembly is suspended by the hoist slings remove the mounting stand feet STEP 6 Lower the switchgear assembly through the manhole opening STEP 7 Re install the mounting stand feet removed i...

Страница 14: ...lt in damage to the bushings and bushing wells STEP 2 Install cable support brackets in accordance with the appropriate reference drawing included in the installation and operation information kit See...

Страница 15: ...single or multiple connection to realize the maximum momentary rating of the switchgear assembly For a multiple cable connection cables smaller than 1 0 copper or equivalent should not be used STEP 4...

Страница 16: ...og dimensional drawing Make sure the hinged roof section and all doors open and the latch closes without binding Binding indicates enclosure distortion that must be corrected by additional shimming Ac...

Страница 17: ...ee Figure 14 Open door far enough to permit the door holder mechanism to engage automatically STEP 5 To open the left hand door lift the finger latch See Figure 15 Open door far enough to permit the d...

Страница 18: ...tical position is a two person exercise especially on switchgear assemblies having four or more ways NOTICE The hinged roof cannot be placed in the second more vertical position if the hinged roof cou...

Страница 19: ...into the pit horizontally and up to the gear at a 90 angle Failure to follow these precautions can result in damage to the bushings and bushing wells STEP 4 Install cable support brackets in accordanc...

Страница 20: ...re See Figure 18 Then cut the plastic cable ties holding the longer lever arms in the down position STEP 3 At one end of the enclosure pivot the longer lever arm up and position it on the back side of...

Страница 21: ...con tinuous ground bus catalog number suffix O connect the ground bus to the enclosure ground pad Then connect the enclosure ground pad to the system ground in accordance with the user s standard prac...

Страница 22: ...s instruc tions Optional mounting provisions for fault indicators catalog number suffix F1 or F2 are available for Vista SD Underground Distribution Switchgear If mounting provisions are specified mo...

Страница 23: ...ld open mechanism At the other end of the enclosure push up on the hinged roof just enough to allow the left hand hold open mechanism latch to be released ensuring the right hand hold open latching me...

Страница 24: ...es between the cable and the conduit and cap all empty conduits to prevent the entry of moisture and rodents STEP 2 Wipe down the exterior of the enclosure with a clean damp cloth Refinish any scratch...

Страница 25: ...t because the switchgear may be subjected to dc test voltage when connected to the cable The dc withstand test voltages listed in the table are approxi mately equal to the ac test voltage Dc Cable Tes...

Страница 26: ...made after installa tion of the power cable system including terminations and joints but before the cable system is placed in normal service A maintenance test is a field test made during the operati...

Страница 27: ...ging the cable and regrounding the cable Failure to follow these recommendations can result in a flashover injury and equipment damage NOTICE When VLF cable testing has been completed or has been inte...

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