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S&C PMX
Outdoor Distribution (13.8 kV and 25 kV)
TABLE OF CONTENTS
Section
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Qualifi ed Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . . .3
Retain this Instruction Sheet . . . . . . . . . . . . . . . . . . . .3
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Understanding Safety-Alert Messages . . . . . . . . . . . . .5
Following Safety Instructions . . . . . . . . . . . . . . . . . . . .5
Replacement Instructions and Labels . . . . . . . . . . . .5
Enclosure Security . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Access Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Location of Safety Labels . . . . . . . . . . . . . . . . . . . . . . .7
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Charging the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Access to Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cable Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Preparing for Service . . . . . . . . . . . . . . . . . . . . . . . . . . 17
S&C ELECTRIC COMPANY
Specialists in Electric Power Switching and Protection
Modular Metal-Enclosed Switchgear
Instructions for Installation
Page
Section
Mini-Rupter® Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Power Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Switch Operator-Type PM . . . . . . . . . . . . . . . . . . . 31
Micro-AT Source-Transfer Control . . . . . . . . . . . . . 31
Voltage Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Current Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Mechanical Interlocks . . . . . . . . . . . . . . . . . . . . . . . . .33
Key Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Enclosure Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Supersedes Instruction Sheet 627-500 dated 1-19-04
Page
. . . . . . .29
Instruction Sheet 627-500
©
April 11, 2005
2005
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Summary of Contents for S&C PMX
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Page 1: Table Of Contents
Page INTRODUCTION ADDITIONS TO EXISTING PMX ASSEMBLIES ..29 General ........2 COMPONENTS Qualifi... -
Page 2: Introduction
The following instructions are for installation of manual or power-operated S&C PMX Modular Metal-Enclosed Switchgear rated 13.8 kV or 25 kV. An assembly of PMX Switchgear may incorporate many types of components, such as interrupter switches, power fuses, switch operators, a source-transfer control, voltage sensors, current sensors, meters, etc., depending on user requirements. -
Page 3: Read This Instruction Sheet
S&C PMX Modular Metal-Enclosed Switchgear. Familiarize yourself with “SAFETY Instruction Sheet INFORMATION” on pages 5 through 7. Retain this This instruction sheet is a permanent part of your S&C PMX Modular Metal-Enclosed Instruction Sheet Switchgear. Designate a location where you can easily retrieve and refer to this publication. -
Page 4: Warranty
INTRODUCTION Warranty The warranty and/or obligations described in S&C’s standard conditions of sale, as set forth in Price Sheet 150, plus any special warranty provisions, as set forth in the applicable product-line specification bulletin, are exclusive. The remedies provided in the former for breach of these warranties shall constitute immediate purchaser’s or end user’s exclusive remedy and a fulfillment of all seller’s liability. -
Page 5: Safety Information
There are several types of safety-alert messages which may appear throughout this Safety-Alert instruction sheet as well as on labels and tags attached to the PMX Switchgear. Familiarize Messages yourself with these types of messages and the importance of the various signal words, as explained below. -
Page 6: Enclosure Security
SAFETY INFORMATION Enclosure Security S&C PMX Switchgear incorporates many provisions to minimize hazards to qualifi ed persons and to the general public. Each module is fabricated from 11-gauge steel sheet and is free-standing, and self-supporting. There are always double walls between adjoining modules. -
Page 7: Location Of Safety Labels
SAFETY INFORMATION Location of Safety Labels Reorder Information for Safety Labels Location Safety Alert Message Description Number Ç High Voltage—Keep Out G-4900R2 CAUTION Ç All Bolts Must Be Tightened G-9055 CAUTION Ç Danger—High Voltage—Keep Out G-6500 DANGER Ç Danger—Switches May Be Energized By Backfeed G-6501 DANGER Ç... -
Page 8: Inspection And Handling
INSPECTION AND HANDLING Packing Each module is fastened to its own wooden skid. Fuses, end-fi ttings, and splice-plate kits are packaged separately. At the fi rst opportunity, remove all packing materials (cardboard, paper, foam padding, etc.) from the outside of the module. This will prevent the finish from being damaged by rainwater absorbed by the packing materials and will also prevent wind-induced abrasion... -
Page 9: Handling
INSPECTION AND HANDLING Handling Ç WARNING See Detail A When handling PMX Switchgear with an overhead hoist, obser ve standard lifting practices as well as the general instructions below. Failure to follow 60° MIN. t he se precaut ions ca n re su lt i n serious personal injury or equipment damage. -
Page 10: Battery Storage
NOTICE Remote supervisory modules of PMX Switchgear furnished with a battery charger and battery packs should preferably be installed and energized immediately. If the modules cannot be installed immediately, store them in a clean, cool, dry room, or remove the battery packs and store them in a cool, dry place. - Page 11 Refer to S&C Instruction Sheet 669-515 for instructions on replacing the battery packs. Then If the PMX Switchgear has not been placed in service proceed to Step 7 below. by the date shown on the tag attached to the switch operator containing the battery, the battery charger must b.
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Page 12: Installation
INSTALLATION Access to Interior To Open Doors and Panels Snap lock Enclosure Door Step 1 The non-removable manual handle rotates for door opening. As illustrated in Figure 3, open the door by moving the handle clockwise 90° until door is unlatched. Rotate handle 90°... -
Page 13: Placement
INSTALLATION To Close Doors and Panels Enclosure Door Step 5 Release the doorstop, and push and hold the door closed. Then rotate the handle counter clockwise to engage the latch points. See Figure 3. Step 6 Pull outward on the handle cover to verify that the door has latched securely and insert a padlock into the hasp. - Page 14 INSTALLATION When assembling PMX Switchgear, the module having working clearance most affected by adjacent walls should be placed fi rst. Unbolt t he modu le f rom it s sk id a nd lift observing the precautions given under “Handling” on page 9. Align the channel base so that it is centered on and square with the anchor bolts.
- Page 15 Do not attempt to draw misaligned modul e s t ogeth e r with th e se bolt s. See Figure 8. This Not this! Figure 8. Alignment of PMX Switchgear modules. 627-500...
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Page 16: Cable Terminations
INSTALLATION Cable Terminations Location of bolts for removing NOTICE roof sections The roof is heavy. At least two line crew are needed to remove the roof. Step 16 For each module, remove the ¹⁄₂ 13 hex-head stainless-steel cap screws, lockwashers, and fl... -
Page 17: Preparing For Service
INSTALLATION Preparing for Service Step 19 The bus construction in PMX Switchgear is typically aluminum, as are the terminal pads of components. Such connections employ Figure 11. Main bus with Belleville washers (if applicable). Belleville (formed spring-steel) washers. See Figure 11. Check these connections, but do not tighten factory-made connections employing Belleville washers unless they are visibly loose;... - Page 18 INSTALLATION To ensure the highest quality joints, mating surfaces of aluminum bus ends and splice plates should be re-abraded with the abrasive paper provided and immediately coated with a uniform layer of Penetrox A, just prior to making bolted connections. NOTE: For copper main bus and ground bus, joint surfaces are silver-plated and require no corrosion-inhibiting compounds.
- Page 19 INSTALLATION Step 20 Make up bus splices as follows. See Figures 13, 14 and 15. (a) For aluminum-to-aluminum bus connec- tions: Place the splice plate on the bottom of the ends of the main bus sections, and on the side of the ground bus that faces the interior of the module.
- Page 20 INSTALLATION Step 21 Connect the ground bus (or ground pad 66³⁄₄ on single module assembly) to the system grounding facility in accordance with the user’s standard grounding practice. Use a cable not smaller than 1/0 copper, or equivalent. If the maximum momentary rating of the switchgear is to be realized, the equivalent of 750 kc mil 1³⁄₄...
- Page 21 INSTALLATION Step 23 Make up the terminal pad connections. Flat washer NOTE: Torque values apply only to the Copper connector ¹⁄₂ -inch ha rdwa re descr ibed a nd not to connectors used to secure primary leads of voltage transformers or surge arresters to the bus.
- Page 22 INSTALLATION (c) For copper terminal pads to aluminum connectors, use ¹⁄₂-inch galvanized steel hardware with one Belleville washer (not Belleville washer furnished) against the aluminum connec- Aluminum connector tor and one galvanized steel or brass fl at washer against the copper terminal pad as shown in Figure 18, Detail A.
- Page 23 INSTALLATION Step 24 If necessary, interphase barriers can be removed to facilitate makeup and connection of cable terminations to switch, fuse, or bus terminals. See Figure 19. If the interphase barriers are removed, note their positioning to ensure correct reinstallation later. Make sure the connection of the incoming-power source(s) to the switchgear terminals is in the proper phase sequence.
- Page 24 INSTALLATION Step 26 If secondary and control wiring are present, all terminals should be checked for tightness, and the jumpers between terminal blocks of adjacent modules should be reconnected at points where “shipping splits” occur. The individual wires at these blocks are marked to correspond with the adjacent terminal-block marking.
- Page 25 INSTALLATION Step 29 F use holders, fuse units, end f ittings, interrupting modules, etc. are packaged separately. (a) Assemble these components following the procedure described in the S&C instruc- tion sheet packed with the applicable fuse components. (b) Install the fuses in the fuse mountings fol- lowing the appropriate procedure described in the S&C instruction sheet on operation, which is included with this switchgear.
- Page 26 INSTALLATION Step 30 For PMX Switchgear furnished with a source- transfer entrance module and the optional overcurrent lockout feature, Catalog Number Suffix “-Y21”, six S&C Current Sensors— packed separately—are provided. Connect the leads from the current sensors the module to the terminal block located in the terminal block compartment—behind the bolted panel...
- Page 27 INSTALLATION Step 31 The terminal blocks furnished with the Refer to the applicable wiring diagram and optional auxiliary switch, Catalog Number make the appropriate connections from the Suffi x “-C9”; optional remote-indication feature, current sensors (with polarity marked on top) Catalog Number Suffix “-Y4”;...
- Page 28 INSTALLATION Step 33 Ç CAUTION Install and connect surge arresters, if applicable. Before Walking Away . . . Step 34 1. Check the interior of each module for foreign Sweep debris from the fl oors of the modules and wipe materials, tools, etc., that may have been mislaid barriers, insulators, bushings, terminators, switches, on high-voltage bus and supporting members.
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Page 29: Additions To Existing Pmx Assemblies
ADDITIONS TO EXISTING PMX ASSEMBLIES Since provisions for future extensions are standard on all PMX Switchgear, additions to existing assemblies may be easily made. To m i n i m i ze out a ge t i me, proceed a s... - Page 30 ADDITIONS TO EXISTING PMX ASSEMBLIES Step 3 Move the new module into place immediately adjacent to the existing end module. Complete all bus and cable connections and other operations described in Steps 9 through 36, on pages 13 through 28.
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Page 31: Components
The S&C Mini-Rupter Switch is a three-pole group-operated contacts for remote indication of the switch position; interrupter switch. It is applied in PMX Switchgear for a decoupler to permit operation of the switch operator switching loads of up to 600 continuous amperes at 13.8 kV without affecting the position of the switch;... -
Page 32: Voltage Sensor
It has relay accuracy over an ambient temperature range of -40° F to +160° F. In PMX Switchgear, voltage sensors are typically used to replace apparatus insulators at the hinge end of Mini-Rupter Switches where three-phase sensing for detection of open-phase conditions is required;... -
Page 33: Interlocks
“CDA” and “RD” drawings. Mechanical Interlocks Mechanical interlocks are included on all PMX Switchgear modules with switches or fuses. These interlocks prevent the module door from being opened when the switch is closed and the switch from being closed when the module door is open. -
Page 34: Dielectric Testing
DIELECTRIC TESTING Rating, kV Withstand, kV System Applied Line-to-Ground Nom. Nom. Impulse (BIL) 60-Hz, RMS 13.8 17.0 14.4 16.7 The output voltage of S&C Voltage Sensors, which may be furnished The column headed “Dc” is given as a reference only for those making with the switchgear, are normally 20 volt-amperes at 120 volts, 60 hertz dc tests and represents values believed to be appropriate and approxi- with a 720-ohm resistive burden connected across the output terminals... -
Page 35: Maintenance
The responsibility for ensuring that a fi nish protects the pose no problem to the user of PMX Switchgear since the enclosure lies with both the manufacturer and the user. equipment rarely needs attention. Mechanical maintenance PMX Switchgear is finished with the S&C Ultradur®... - Page 36 MAINTENANCE Ç WARNING 6. Follow instructions supplied by the manufacturer of When access to high-voltage compartments is required, it must be restricted to qualifi ed persons as described by the equipment to be maintained or other pertinent OSHA regulations and NFPA70E. Also defi ned in these information.
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Page 37: Specifications
SPECIFICATIONS OPTIONAL FEATURES Suffi x to be Description Applicable to Modules Added to Module Number Light Gray Outdoor (Standard) Finish Color 1 All modules Olive Green Outdoor All 13.8-kV modules -A10 Stainless-Steel Enclosure 1 All 25-kV modules -A11 All modules except Duplex, Remote Key Interlock 2 Supervisory, and Source-Transfer Manually operated switch... - Page 38 SPECIFICATIONS OPTIONAL FEATURES—Continued Suffi x to be Description Applicable to Modules Added to Module Number Two transformers, phase to phase -DF2 Compete Provisions for Three transformers, phase to ground -DF3 Fused Voltage Transformers12 Two transformers, phase to phase -DF5 All Metering Modules Two transformers, phase to ground -DF7 Mounting Provisions for...
- Page 39 SPECIFICATIONS OPTIONAL FEATURES—Continued Suffi x to be Description Applicable to Modules Added to Module Number 100/5 -GD1 200/5 -GD2 400/5 -GD4 Three Wound-Type (Bar-Type) Current All 13.8-kV Metering Modules Transformers1 600/5 -GD6 800/5 l -GD8 1200/5 l -GD12 100/5 -GC21 200/5 -GC22 400/5...
- Page 40 SPECIFICATIONS OPTIONAL FEATURES—Continued Suffi x to be Description Applicable to Modules Added to Module Number 3-kV distribution class, -NA3 4.16-kV applications only 6-kV distribution class, -NA6 4.16-kV applications only 9-kV distribution class, 13.8-kV -NA9 applications only Surge Arresters, Set of Three 10-kV distribution class, All Entrance and Cable Entrance -NA10...
- Page 41 SPECIFICATIONS OPTIONAL FEATURES—Continued Suffi x to be Applicable to Item Added to Module Modules Number Communication and Control Equipment Group 12 —includes user-specified remote terminal unit (RTU); user-specified communication device; battery charger; battery packs; voltage sensor for power input to Contact your nearest battery charger and single-phase voltage sensing;...
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