S C PME-9 Pad Mounted Gear Outdoor Distribution Instruction Manual

S C PME-9 Pad Mounted Gear Outdoor Distribution

Specifications

• Product Name: S&C Source-Transfer PME Pad-Mounted Gear Outdoor Distribution
• Voltage Options: 14.4 kV and 25 kV

Product Information

The S&C Source-Transfer PME Pad-Mounted Gear Outdoor Distribution is designed for outdoor distribution of power at either 14.4 kV or 25 kV. It includes various components for safe and efficient operation.

Safety Precautions

Before operating the equipment, ensure that only qualified persons who are knowledgeable in the installation, operation, and maintenance of electric distribution equipment handle it. Proper safety measures should be followed to prevent any hazards.

Components

The product components include fuse access, TransFuserTM mounting, preliminary tryout procedures, dielectric testing instructions, and more. Each component plays a crucial role in the operation and maintenance of the equipment.

Product Usage Instructions

1. Fuse Access – Opening

To open the fuse access, follow the steps outlined in the manual. This process is essential for maintenance and inspection purposes.

2. Fusing

Assembling the fuse correctly is crucial to ensure safe operation. Follow the provided instructions for proper assembly and installation of the fuse in the mounting.

3. Fuse Access – Closing

After completing maintenance or inspection tasks, ensure proper closing of the fuse access. Follow the guidelines provided to securely close the TransFuser mounting.

4. Final Checks Before Walking Away

Prior to leaving the equipment unattended, perform final checks as specified in the manual to ensure everything is in order and safe for operation.

5. Maintenance

Regular maintenance is crucial for the longevity of the equipment. Follow the maintenance procedures outlined in the manual to keep the product in optimal condition.

FAQs

• Q: Who should operate this equipment?
  • A: Only qualified persons with knowledge in electrical distribution equipment should operate this product.

S&C Source-Transfer PME Pad-Mounted Gear Outdoor Distribution (14.4 kV and 25 kV)

With Micro-AT® Source-Transfer Control

Introduction

Qualified Persons
Read this Instruction Sheet Retain this Instruction Sheet Proper Application

WARNING
Only qualified persons knowledgeable in the installation, operation, and maintenance of overhead and underground electric distribution equipment, along with all associated hazards, may install, operate, and maintain the equipment covered by this publication . A qualified person is someone trained and competent in: The skills and techniques necessary to distinguish exposed live parts from
nonlive parts of electrical equipment The skills and techniques necessary to determine the proper approach distances
corresponding to the voltages to which the qualified person will be exposed The proper use of special precautionary techniques, personal protective
equipment, insulated and shielding materials, and insulated tools for working on or near exposed energized parts of electrical equipment
These instructions are intended only for such qualified persons . They are not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment .
NOTICE
Thoroughly and carefully read this instruction sheet and all materials included in the product’s instruction handbook before installing or operating source-transfer PME Pad-Mounted Gear . Become familiar with the Safety Information on page 4 and Safety Precautions on page 6 . The latest version of this publication is available online in PDF format at sandc .com/en/contact-us /product-literature/ .
This instruction sheet is a permanent part of the source-transfer PME Pad- Mounted Gear. Designate a location where users can easily retrieve and refer to this publication.
WARNING
The equipment in this publication is only intended for a specific application . The application must be within the ratings furnished for the equipment . Ratings for sourcetransfer PME Pad-Mounted Gear are listed in the ratings table in S&C Specification Bulletin 665-31 . The ratings are also on the ratings label on the interior of the doors (right-hand door only for double- door models) .

2 S&C Instruction Sheet 665-610 .

Warranty
Warranty Qualifications

Introduction
The warranty and/or obligations described in S&C’s Price Sheet 150, “Standard Conditions of Sale–Immediate Purchasers in the United States,” (or Price Sheet 153, “Standard Conditions of Sale–Immediate Purchasers Outside the United States”), 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 the immediate purchaser’s or end user’s exclusive remedy and a fulfillment of the seller’s entire liability. In no event shall the seller’s liability to the immediate purchaser or end user exceed the price of the specific product that gives 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 only warranties are those stated in Price Sheet 150 (or Price Sheet 153), and THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ANY EXPRESS WARRANTY OR OTHER OBLIGATION PROVIDED IN PRICE SHEET 150 (OR PRICE SHEET 153) IS GRANTED ONLY TO THE IMMEDIATE PURCHASER AND END USER, AS DEFINED THEREIN. OTHER THAN AN END USER, NO REMOTE PURCHASER MAY RELY ON ANY AFFIRMATION OF FACT OR PROMISE THAT RELATES TO THE GOODS DESCRIBED HEREIN, ANY DESCRIPTION THAT RELATES TO THE GOODS, OR ANY REMEDIAL PROMISE INCLUDED IN PRICE SHEET 150 (OR PRICE SHEET 153)
The standard warranty contained in the seller’s standard conditions of sale (as set forth in Price Sheet 150) does not apply to source-transfer PME Pad- Mounted Gear where fuse units, fuse-unit end fittings, holders, refill units, or switch blades of other than S&C manufacture are used in conjunction with S&C SME Mountings. Nor does it apply to source-transfer PME Pad-Mounted Gear where other than Fault Fiter® Electronic Power Fuses, S&C Switch Blades, or where current-limiting fuses are used other than as set forth in Table 2 of S&C Information Bulletin 660-50 or when current-limiting fuses are applied other than as set forth in the “Recommended Voltage Ratings” section in S&C Information Bulletin 660-50.
The seller’s standard warranty also does not apply to major components not of S&C manufacture, such as remote terminal units and communication devices, including hardware, software, resolution of protocol-related matters, and notification of upgrades or fixes for those devices.

. S&C Instruction Sheet 665-610 3

Safety Information

Understanding Safety-Alert Messages
Following Safety Instructions

Several types of safety-alert messages may appear throughout this instruction sheet and on labels and tags attached to the product. Become familiar with these types of messages and the importance of these various signal words:
DANGER
“DANGER” identifies the most serious and immediate hazards that will likely result in serious personal injury or death if instructions, including recommended precautions, are not followed .
WARNING
“WARNING” identifies hazards or unsafe practices that can result in serious personal injury or death if instructions, including recommended precautions, are not followed .
CAUTION
“CAUTION” identifies hazards or unsafe practices that can result in minor personal injury if instructions, including 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 .
If any portion of this instruction sheet is unclear and assistance is needed, contact the nearest S&C Sales Office or S&C Authorized Distributor. Their telephone numbers are listed on S&C’s website sandc.com, or call the S&C Global Support and Monitoring Center at 1-888-762-1100.
NOTICE

Read this instruction sheet thoroughly and carefully before installing source- transfer PME Pad-Mounted Gear .

Replacement Instructions and Labels

If additional copies of this instruction sheet are required, contact the nearest S&C Sales Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
It is important that any missing, damaged, or faded labels on the equipment be replaced immediately. Replacement labels are available by contacting the nearest S&C Sales Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.

4 S&C Instruction Sheet 665-610 .

Location of Safety Labels
Doors
A

Safety Information
WARNING
KEEP OUT

B
C
Switch side cable termination compartment

Hazardous voltage inside. Can shock, burn, or cause death.
If open or unlocked, immediately call electric company.
G-6398

Ç DANGER

B

Hazardous voltage–more than 4000 volts.

Failure to follow these instructions will likely cause shock, burns, or death.

· ALWAYS consider all circuits and component parts live until completely de- energized, tested, grounded, and tagged or properly identified.

· Do not work on or near this equipment

C

unless you: (1) Know and obey your employer’s work

rules and S&C’s instruction sheetsd (in

Compartment 1); and

(2) Know the hazards involved with this high-voltage equipment.

· ALWAYS use proper personal protective equipment, protective devices, and tools suitable for the assigned task.
d Note: Additional instruction sheets are available free of charge from S&C by calling 773-338-1000.

G-6503R1

B

B

C
Fuse side cable termination compartment

Reorder Information for Safety Labels

Location

Safety Alert Message

Description

A

WARNING Keep Out . Hazardous voltage inside . . .

B

DANGER

Hazardous Voltage – more than 4000 Volts . . .

C

DANGER

Keep Away . Hazardous voltage – more than 4000 Volts . . .

The same A labels are located on the rear doors as well .

DANGER
KEEP AWAY
C
Hazardous voltage–more than 4000 volts. Will shock, burn, or cause death. · Qualified persons only. · If open, immediately call
electric company.
G-6500
Part Number G-6398 G-6503 G-6500

. S&C Instruction Sheet 665-610 5

Safety Precautions

DANGER

Remote supervisory PME Pad-Mounted Gear operates at high voltage . Failure to observe the precautions below will result in serious personal injury or death .
Some of these precautions may differ from your company’s operating procedures and rules . Where a discrepancy exists, follow your company’s operating procedures and rules .

1 . QUALIFIED PERSONS . Access to pad-mounted gear must be restricted only to qualified persons . See the “Qualified Persons” section page 2 .
2 . SAFETY PROCEDURES . Always follow safe operating procedures and rules .
3 . PERSONAL PROTECTIVE EQUIPMENT . Always use suitable protective equipment, such as rubber gloves, rubber mats, hard hats, safety glasses, and flash clothing in accordance with safe operating procedures and rules .
4 . SAFETY LABELS . Do not remove or obscure any of the “CAUTION,” “WARNING,” or “DANGER” labels .
5 . KEY INTERLOCKS .
If optional key interlocks were furnished, they must be in place .
Check the operating sequence of key interlocks to verify proper sequencing .
After the pad-mounted gear is installed, either: (1) destroy the extra set of keys or (2) make them accessible only to qualified persons . This will maintain the integrity of the key-interlock scheme .
Key interlocks are not security locks and are not substitutes for padlocks .
6 . HIGH-VOLTAGE ISOLATION . Switch operators and controls are isolated from high voltage in grounded, metal-enclosed compartments . Access to these components is controlled by padlockable covers, which incorporate a nonremovable manual handle . Other low-voltage components, such as meters, selector switches, toggle switches, etc ., are similarly isolated .
7 . OPENING DOORS . Do not force doors open . Forcing a door open can damage the latching mechanism . If optional key interlocks are provided, correctly position the interlocks so the doors can be opened .
8 . CLOSING AND LOCKING DOORS . Doors must be securely closed and latched, with padlocks in place at all times unless work is being performed inside the enclosure .
Mini-Rupter® Switches have switch-operatingshaft access covers located on the sides of the pad- mounted gear enclosure . They must be closed and padlocked at all times unless the switches are being operated .
Do not close a door on a TransFuserTM Mounting in the Open position with a fuse in the mounting . The door will strike the fuse pull-ring, which will

interfere with door closing . The door may be closed if the fuse is removed from the mounting .
9 . ENERGIZED TERMINALS . Always assume both sets of power terminals on any Mini-Rupter Switch or fuse are energized unless proved otherwise by test, by visual evidence of open-circuit conditions on both sets of terminals, or by observing that both sets of terminals are grounded .
10 . BACKFEED . Mini-Rupter Switches and fuses may be energized by backfeed .
11 . DE-ENERGIZING, TESTING, AND GROUNDING . Before touching any device that is to be inspected, replaced, serviced, or repaired in the high-voltage compartments, always disconnect Mini-Rupter Switches and fuses from all power sources (including backfeed), test for voltage, and properly ground .
12 . TESTING . Test for voltage on both sets of power terminals of any Mini- Rupter Switch or fuse using proper high-voltage test equipment before touching any device that is to be inspected, replaced, serviced, or repaired in the high-voltage compartments .
13 . GROUNDING .
Make sure the pad-mounted gear enclosure is properly grounded to the station or facility ground .
After the gear has been completely disconnected from all sources of power and tested for voltage, install suitable grounding cables in all compartments before touching any device that is to be inspected, replaced, serviced, or repaired in the high-voltage compartments .
14 . SWITCH POSITION .
Always confirm the Open/Close position of Mini-Rupter Switches by visually observing the position of the switch blades .
Switches may be energized by backfeed .
Switches may be energized in any position .
15 . MAINTAINING PROPER CLEARANCE . Always maintain proper clearance from energized components .
16 . FUSE STORAGE .
Always store fuses in a clean, dry location .
Do not store end-fittings, holders, interrupting modules, or fuses in termination compartments unless the unit is equipped with the optional fuse- storage feature (catalog number suffix “-E1,” “-E2,” or “-E3”) .

6 S&C Instruction Sheet 665-610 .

Overview

Instruction manuals regarding installation and operation of the pad-mounted gear are included in the “Installation and Operation Information Kit” provided with each unit of source-transfer PME Pad-Mounted Gear. Wiring diagrams and a catalog dimensional drawing showing cable-locating and anchor-bolt dimensions are also provided in the information kit. All personnel involved with installation and operation of the gear should be thoroughly familiar with the contents of the kit.
These instructions are for operation of fuses and Mini-Rupter Switches in source-transfer PME Pad-Mounted Gear equipped with the Micro-AT® SourceTransfer Control. For installation instructions, refer to S&C Instruction Sheet 665-605. For instructions regarding field-programming and operation of the Micro-AT control, refer to S&C Instruction Sheet 515-500.
Source-transfer PME Pad-Mounted Gear is a totally self-contained switching and protection package that provides fault protection and fully automatic two-way source transfer for critical loads requiring a high degree of service continuity. This gear contains the following:
Switch-operator driven 600-ampere Mini-Rupter Switches for three-pole live switching of three-phase source circuits
Stored-energy operators to provide high-speed power operation of the Mini- Rupter Switches (The operators automatically charge when voltage is present on the associated source.)
A Micro-AT Source-Transfer Control for programmed control of all switching functions associated with automatic source transfer
S&C Voltage Sensors to provide three-phase sensing for automatic source transfer and control power for the Micro-AT control (The voltage sensors also provide supply power for motor-charging of the stored-energy operators and capacitor-charging for solenoid tripping of the operators.)
Decouplers to permit exercising of the stored-energy operators without affecting the position of the Mini-Rupter Switches

TransFuser Mountings, which are fuse-handling mechanisms with mechanical interlocks (The models available offer a choice of S&C Type SME-20 and SME-4Z Power Fuses, Fault Fiter Electronic Power Fuses, or a variety of single-barrel current-limiting fuses.)
A Penta-Latch® Mechanism on each door (righthand door only for double-door models) for access control (The mechanism provides automatic door latching and permits padlocking only when the door is latched closed. Doors can be opened only with a pentahead socket wrench or tool except when hexhead actuators are specified
A variety of optional features are available for source-transfer PME Pad- Mounted Gear. The catalog number stamped on the nameplate affixed to the enclosure door is suffixed with letter-number combinations applicable to the gear furnished. Refer to S&C Specification Bulletin 665-31 for descriptions of the optional features.

. S&C Instruction Sheet 665-610 7

Overview

TransFuser Mounting
200-ampere bushing wells

Ground tabs for grounding bushing well inserts

Door holder

Cable guides are mounted horizontally, extend toward TransFuser Mounting

Ground bails are mounted vertically

Door holder

600-ampere bushings

Viewing windows allow visual verification of switch position

Penta-Latch Mechanism

Instruction manual holder (located in low-voltage compartment on source- transfer pad-mounted gear models)

Ground rods extend full width of switch compartment

Figure 1 . Model PME-9 showing open-door views of fuse-termination compartments (above) and switch-termination compartments (below) .

8 S&C Instruction Sheet 665-610 .

Overview

Remote Indication
Refer to S&C Instruction Sheet 515-500 for an operating description of the Micro-AT Source-Transfer Control.
The optional Remote Indication feature includes isolated contacts wired to a terminal block for the user’s external connection to remote indicating devices. Isolated contacts are provided for remotely monitoring the presence of source voltages; the position of the MANUAL/AUTOMATIC operation selector switch; and the status of the READY indicating lamp, EVENT

indicating lamp, and overcurrent-lockout circuit (if furnished). Remote indicating devices and their control power are to be provided by the user and installed in accordance with the manufacturer’s instructions.
Figure 2, Figure 3 on page 10, and Figure 4 on page 11 illustrate many of the basic components and features of source-transfer Pad-Mounted Gear. Before proceeding with the remainder of the instructions, S&C recommends these figures be reviewed to gain familiarity with the various components and locations.

Open/Close pushbuttons

Remote-control receptacle

Operator target indicates whether stored-energy operator is in Switch Open or Switch Closed position and whether quick-make quick-break mechanism is charged or discharged

Emergency trip access cover

Operation selector

Switch-position target

Operation counter
Charging shaft

Decoupler indicator

Dual-purpose manual handle

Decoupler handle

Figure 2 . Low-voltage control compartment .

Bolted cover provides access to input plug and shorting receptacle for Micro- AT control

Micro-AT Source-Transfer Control

Terminal-block compartment

. S&C Instruction Sheet 665-610 9

Overview Components
LEFT SOURCE OLTAGE indicating lamp
AUTOMATIC TRANSFER READY indicating lamp Overcurrent LOCKOUT indicating lamp and Reset key voltage on right source (furnished with optional Overcurrent Lockout feature)
Test keys for simulating overcurrent and loss of voltage on left source
Figure 3 . A Micro-AT Source-Transfer Control .
10 S&C Instruction Sheet 665-610 .

RIGHT SOURCE VOLTAGE indicating lamp
MANUAL/AUTOMATIC operation selector switch or when in Manual mode, prevents an automatic source transfer while permitting manual operation using Open/ Close keys
Two-line 3 24-character backlit liquid-crystal display (LCD)
Menu keys
Last and next item keys
Test keys for simulating overcurrent and loss of voltage on right source
Keypad

Voltage limiters

Overview
Remote-indication wiring provided with optional Remote Indication feature, leads to a terminal block for user’s connections
Supervisory control wiring (not shown) provided with optional Supervisory Control feature, also leads to a terminal block for user’s connections

Input plug (signal-voltage, control-voltage, and currentsensing input circuits)

Input receptacle Shorting receptacle

Figure 4 . Access panel removed showing the input plug, input receptacle, and shorting receptacle of a Micro-AT SourceTransfer Control .

. S&C Instruction Sheet 665-610 11

Mini-Rupter® Switches

WARNING

To avoid accident, property damage, or personal injury, follow these safety guidelines:
1 . To prevent an automatic operation when decoupling or coupling an operator to a switch, during manual charging of an operator, or when manually operating a switch, place the MANUAL/ AUTOMATIC operation selector switch located on the faceplate of the Micro-AT Source-Transfer Control in Manual mode .
2 . Do not perform any switching operations if the source-transfer control is in Lockout mode as indicated by illumination of the LOCKOUT lamp . See Figure 3 on page 10 . For such cases, see the “Overcurrent-Lockout Condition” section in S&C Instruction Sheet 515-500 .
3 . If the gear is energized and paralleling of sources is not permitted, decouple both stored-energy operators (see the “Decoupling” section) to avoid temporary service interruptions when manually operating the gear . Switching operations will result in temporary service interruptions if stored-energy operators are coupled .
4 . Because of operating errors, the stored-energy operator’s quick-make quick-break mechanism may stall in a Partially Discharged state . The conditions that will cause this mechanism to stall, as well as instructions for restoring the operator to the normal Latched Open condition after a stall, are listed under the “If Operator Stalls . . .” section on page 30 .

5 . Do not assume the operator position necessarily indicates the Open or Closed position of the MiniRupter Switch . Upon completion of an opening or closing operation, make sure the following conditions exist:
The operator target (see Figure 2 on page 9) signals “OPERATOR IN SWITCH-OPEN POSITION” or “OPERATOR IN SWITCH-CLOSED POSITION” to indicate the switch operator has moved through a complete operation .
The switch-position target (see Figure 2) which signals “SWITCH OPEN” or “SWITCH CLOSED,” is in agreement with the operator target .
The switch position, as verified by visual check of the switch-blade position, is in agreement with the switch-position target . A viewing window is provided in the switch compartment to allow positive visual verification of switch- blade position (see Figure 1 on page 8) .
The operator target (see Figure 2 on page 9) signals “OPERATOR CHARGED” to indicate the operator is ready for the next operation .
6 . To prevent all electrical and mechanical operations, padlock the operation selector in the Lock position . This will also prevent motor-charging of the storedenergy operator if system operating procedures require the quick-make quick-break mechanism to remain discharged and source voltage is present .

12 S&C Instruction Sheet 665-610 .

Decoupling

Decoupling is accomplished using the decoupler handle. See Figure 5. When decoupled, the stored-energy operator may be operated without affecting the position of the associated Mini-Rupter Switch. Moreover, when decoupled, the Mini-Rupter Switch is prevented from moving by a mechanical device that locks the switch drive-shaft.
To decouple the stored-energy operators, first place the MANUAL/AUTOMATIC operation selector switch on the faceplate of the Micro-AT Source-Transfer Control in Manual mode. For each stored-energy operator, grasp the decoupler handle and press down on the coupled-position latch to release the handle. Then, move the handle upward to the Decoupled position. Make sure the handle is fully latched in the Decoupled position. While an operator is decoupled, the automatic-transfer READY indicating lamp on the faceplate of the Micro-AT control will not light, which serves as a reminder of the Decoupled condition. See Figure 3 on page 10.

Mini-Rupter® Switches

Figure 5 . Decoupler handle being moved upward to decouple the switch from the associated switch operator .

. S&C Instruction Sheet 665-610 13

Mini-Rupter® Switches
Coupling
To couple the stored-energy operators, first place the MANUAL/AUTOMATIC operation selector switch on the faceplate of the Micro-AT control in Manual mode. Then, make sure the stored-energy operators are in the same position (Open or Closed) as their associated Mini-Rupter Switches by observing the switch-position and operator targets. See Figure 2 on page 9. If required, use the Open/Close keys (provided control power is available) to reposition the operator(s).
For each operator, grasp the decoupler handle and press down on the decoupled- position latch to release the handle. Then, move the handle downward to the Coupled position. Make sure the handle is fully latched in the Coupled position. An attempt to operate a switch not completely coupled (or decoupled) will cause the operator mechanism to stall.
Automatic Switch Operation
High-speed quick-make quick-break operation is provided by stored-energy operators that, when solenoid-tripped in response to control signals from the Micro-AT SourceTransfer Control, automatically open and close the Mini-Rupter Switches. After each Trip operation, the operators automatically charge when voltage is present on the associated source, making them ready for the next operation. For automatic switch operation, the MANUAL/AUTOMATIC operation selector switch on the Micro-AT control must be in Automatic mode. See Figure 3 on page 10. The Micro-AT control will not function automatically if one operator is coupled and the other is decoupled. Field-programming and operation of the Micro-AT control is covered in S&C Instruction Sheet 515-500.
14 S&C Instruction Sheet 665-610 .

Nonautomatic Switch Operation
If control power is available: To manually operate the stored-energy operator’s quick-make quick-break mechanism–and (if coupled) to open or close a Mini-Rupter Switch–place the MANUAL/AUTOMATIC operation selector switch in Manual mode and press the associated Open/Close pushbutton. See Figure 2 on page 9. After each Trip operation, the quick-make quick-break mechanism automatically charges when voltage is present on the associated source. The charging operation takes approximately 25 seconds.
If control power is lost and operator is charged: To manually operate the stored-energy operator’s quickmake quick-break mechanism–and (if coupled) to open or close a Mini-Rupter Switch–insert the small keyed end of the dual- purpose manual handle into the groove of the tripping shaft, behind the cover labeled “EMERGENCY TRIP,” and turn in the direction indicated to effect desired operation. See Figure 6.
If control power is lost and operator is discharged: Manually charge the stored-energy operator’s quick-make quick-break mechanism as described in the “Charging Operator (Nonelectrical)” section on page 16. Then, proceed to the “If Control Power Is Lost and Operator Is Charged” item above.

Mini-Rupter® Switches

Figure 6 . Dual-purpose manual handle inserted in groove of tripping shaft for emergency manual switching if control power is lost and the operator is charged .

. S&C Instruction Sheet 665-610 15

Mini-Rupter® Switches

Charging Operator (Nonelectrical)
The dual-purpose manual handle is used to manually charge the stored-energy operator’s quick-make quickbreak mechanism (required only in the event control power has been lost). See Figure 7. Keep the chargingshaft access port open by holding the operation selector in the Charging position. While the operation selector is in the Charging position, the control circuit is disconnected to prevent manual or automatic electrical operation (charging or tripping) in the event control power is restored, and the emergency-trip port is mechanically blocked to prevent a manual mechanical Trip operation.
While holding the port open, insert the large notched end (with recessed bolt) of the dual-purpose manual handle and secure it to the end of the charging shaft by turning the knurled knob clockwise 8 to 9 turns until firm resistance is felt. To charge the mechanism, grasp the tubular portion of the handle and, while pivoting the handle a few degrees, push in to engage the charging shaft. At the same time, rotate the handle as far as it will go (approximately 120°) in the appropriate direction. The “OPERATOR CHARGED” target will appear in the indicator window.
After the charging operation, loosen the knurled knob and remove the handle. The operation selector will spring-return to the Operating position.
Figure 7 . Dual-purpose manual handle on the charging shaft .
16 S&C Instruction Sheet 665-610 .

Source-transfer PME Pad-Mounted Gear is equipped with the unique TransFuser Mounting, which is a fuse-handling mechanism interlocked with the loadbreak elbow. First, the elbow is removed to interrupt any fuse load. Then, the mechanical interlock is actuated, allowing operation of the TransFuser mechanism. This permits access to the fuse for quick and easy replacement of blown fuses with a conventional shotgun stick. The fuse is accessible only when it is de-energized and isolated.
DANGER
The following procedures presuppose the user has supplied and installed loadbreak inserts and loadbreak elbows .
Open the Mini-Rupter Switches before proceeding if deadbreak inserts and deadbreak elbows are installed or if company operating procedures and rules do not permit switching with elbows . Failure to open the switches when deadbreak inserts and elbows are used will result in a flashover and serious injury .

Fuse Access — Opening

. S&C Instruction Sheet 665-610 17

Fuse Access — Opening

Opening the TransFuserTM Mounting
Complete the following steps to open the TransFuser Mounting:

STEP 1 .

Open the appropriate fuse termination-compartment door and secure it with the door holder. See Figure 8. On double-door models, the adjacent door should be closed and latched to minimize exposure.

200-ampere loadbreak elbow

Parking stand

Door holder

Storage rack for S&C SMU-20® Fuse Units or SM-4® Refill Units

Ground bail

Cable guides

Figure 8 . Termination compartment for fuses with elbows installed on 200-ampere inserts in the bushing wells .

18 S&C Instruction Sheet 665-610 .

Fuse Access — Opening

STEP 2 .

Using a shotgun stick, install a portable feedthru or standoff insulator on the parking stand directly above the cable guide of the elbow to be moved. This will ensure once the elbow is moved, the cable will not interfere with the TransFuser Mounting. Using the shotgun stick, and following the elbow manufacturer’s instructions for loadbreak operation, remove the 200-ampere loadbreak elbow (thus interrupting any load through the fuse to be removed), and move the elbow to the portable feedthru or standoff insulator. See Figure 9.

WARNING
When changing fuses, the 200-ampere interface need not be covered because it will be exposed only temporarily . If company operating procedures and rules require it, the interface may be covered with an insulating protective cap without a drain wire . A cap with a drain wire must not be used . Operation of the TransFuser mechanism will draw the grounded drain wire inside the component compartment close to energized parts, which can result in a flashover and serious injury .

Mechanical interlock in the Locked position
Figure 9 . Removing the loadbreak elbow interrupts any load through the fuse to be removed .

WARNING
If elbows are stored on feedthru or standoff insulators for an extended period of time, cover the 200-ampere interface with an insulating protective cap with a drain wire and connect the drain wire to the ground bail . Failure to connect the drain wire to the ground bail can result in a flashover, injury, and equipment damage .

NOTICE
The insulated protective cap and drain wire must be removed before operating the TransFuser mounting . Failure to remove the cap and drain wire will interfere with operation of the mechanism .

. S&C Instruction Sheet 665-610 19

Fuse Access — Opening

STEP 3 .

When the elbow has been moved and mounted on a feedthru or standoff insulator, the TransFuser mechanism may be operated. Using the shotgun stick, raise the mechanical interlock to unlock the TransFuser Mounting. See Figure 10. This interlock, which cannot be lifted to the Unlocked position until the elbow has been removed, guards against gaining access to the fuse while it is carrying current.

STEP 4 .

Secure the shotgun stick to the pull-ring at the lower end of the TransFuser Mounting. See Figure 11. With an outward pull, rotate the TransFuser Mounting end for end to expose the fuse. Make sure the mounting is latched before removing the shotgun stick. Then, disengage the shotgun stick from the pull- ring. Using the shotgun stick, push against the top of the mounting to verify it has securely latched. With the TransFuser Mounting latched in the Open position, the fuse is de-energized, isolated from high voltage, and accessible for removal from the mounting. See Figure 12 on page 21.

NOTICE
Do not close a door on a TransFuser Mounting in the Open position with a fuse in the mounting . The door will strike the fuse pull-ring, which will interfere with door closing . The door may be closed if the fuse is removed from the mounting .

Bushing insert

Elbow installed on portable standoff insulator

Figure 10 . Raising the mechanical interlock to unlock the TransFuser Mounting .
Mechanical interlock in unlocked position

Shotgun stick secured to the TransFuser Mounting pull-ring

Figure 11 . Unlatching (or latching) the TransFuser Mounting in the Closed position .
20 S&C Instruction Sheet 665-610 .

Fuse Access — Opening
Figure 12 . Latching (or unlatching) the TransFuser Mounting in the Open position .
. S&C Instruction Sheet 665-610 21

Fusing

Source-transfer PME Pad-Mounted Gear is furnished with TransFuser Mountings that accommodate S&C Type SME-20 Power Fuses, S&C Type SME-4Z Power Fuses, or Fault Fiter Electronic Power Fuses. Fault Fiter Electronic Power Fuse mountings also accommodate a variety of current-limiting fuses.
WARNING
When selecting current-limiting fuses, the voltage rating of the fuses must conform to the recommendations in S&C Information Bulletin 660-50 . Failure to conform to these recommendations can result in a flashover, injury, and equipment damage .
Assembling the Fuse S&C Power Fuses
Install an SMU-20 Fuse Unit into each set of end-fittings, an SM-4 Refill Unit into each holder, or a Fault Fiter fuse interrupting module and control module into each holder, in accordance with the instruction sheet furnished with the fuse unit, refill unit, or interrupting module. Current-Limiting Fuses S&C Holders for current-limiting fuses are designed for use in pad-mounted gear models that include mountings for Fault Fiter Electronic Power Fuses. These holders will accommodate the current-limiting fuses listed in Table 2 of S&C Information Bulletin 660-50. For instructions on installing current-limiting fuses in current-limiting fuse holders, refer to S&C Instruction Sheet 660-501.
22 S&C Instruction Sheet 665-610 .

Fusing

Installing the Fuse in the Mounting
Fault Fiter Electronic Power Fuses rated 25 kV should be installed in their mountings by hand using suitable protective equipment. Install all other fuses as follows:

STEP 1 .

Secure a shotgun stick tightly to the fuse pullring with the fuse positioned so the body of the fuse is below the stick. Grasp the shotgun stick with both hands (approximately 2 feet (61 cm) apart), placing one hand on the shotgun- stick latch mechanism.

STEP 2 . Lift the fuse and lower it into the cradle of the fuse mounting.

STEP 3 .

With the fuse securely seated in the cradle, push the fuse forward to latch it in the Closed position. See Figure 13. Disengage the shotgun stick from the fuse.

STEP 4 .

Verify the fuse is properly latched in the fuse mounting. While holding the shotgun stick, push against the fuse holder assembly and pull on the fuse assembly as shown in Figure 14 by locating the ring of the stick in the opening below the pull-ring.

Figure 13 . A fuse lowered into the cradle in preparation for latching to the TransFuser Mounting .

Figure 14 . Pull on the fuse assembly by locating the ring of the stick in the opening below the pull-ring .
. S&C Instruction Sheet 665-610 23

Fuse Access — Closing

Closing the TransFuser Mounting
After the fuse has been installed or replaced, close the TransFuser Mounting (to energize the fuse) as follows:

STEP 1 .

Secure a shotgun stick to the pull-ring at the top of the TransFuser Mounting. Be sure not to ratchet the shotgun all the way up when securing the pull-ring because it may hinder the movement of the TransFuser Mounting. See Figure 12 on page 21. With an outward pull, rotate the TransFuser Mounting end for end to return the fuse to the medium-voltage compartment. Make sure the mounting latches in this position before removing the shotgun stick. Then, disengage the shotgun stick from the pull-ring. Using the shotgun stick, push against the bottom of the mounting to verify it has securely latched.

STEP 2 . Using the shotgun stick, lower the mechanical interlock to lock the TransFuser Mounting.

STEP 3 . If a protective cap was placed on the bushing interface, remove it with the shotgun stick.

STEP 4 .

Using the shotgun stick, move the elbow from the portable feedthru or standoff insulator to the bushing in accordance with the elbow manufacturer’s instructions. Remove the portable feedthru or standoff insulator from the parking stand.

STEP 5 .

Close and latch the enclosure doors. Pull outward on the Penta-Latch Mechanism cover to verify the door has latched securely and then padlock the door.

24 S&C Instruction Sheet 665-610 .

How to Detect a Blown Fuse
Open the appropriate fuse-termination compartment door and secure it with the door holder. On double-door models, the adjacent door should be closed and latched to minimize exposure.
S&C Power Fuses
Observe the blown-fuse target through the viewing windows provided for that purpose. Refer to Figure 15 on page 26 for blown-fuse target locations for S&C Power Fuses:
SME-20 Power Fuses or Fault Fiter Electronic Power Fuses–A red blown-fuse target projects from the SME-20 Power Fuse end-fitting or the Fault Fiter fuse holder when the fuse has operated, making it easy to check the fuse condition with the fuse in the Closed position. The blown-fuse target retracts when the blown fuse unit or interrupting module is replaced.
SME-4Z Power Fuses–A fluorescent-orange target in the translucent SME-4Z Holder moves to the BLOWN indicator window when the fuse operates, permitting a positive visual check of the fuse condition without moving the fuse from its Closed position. The target fluoresces when illuminated.
Current-Limiting Fuses
Current-Limiting Fuses with Blown-Fuse Indicators–To find a blown fuse, gain access to the fuses following the instructions found in the “Fuse AccessOpening” section on page 17. A blown-fuse indicator appears at the trunnion end when the fuse has blown.
Current-Limiting Fuses Without Blown-Fuse Indicators–To find a blown fuse, remove each fuse from its mounting following the instructions in the “Replacing a Blown Fuse” section on page 27. Then, inspect the fuse per the current-limiting fuse manufacturer’s recommendations to determine whether it has blown.

Re-Fusing

. S&C Instruction Sheet 665-610 25

Re-Fusing
Pull-ring

Red target projects from holder when fuse has operated
Fluorescent-orange target appears in BLOWN indicator window when fuse has operated (visible through translucent holder)

Red target projects from end-fitting when fuse has operated

Pull-ring
Blown-fuse targets are visible through viewing windows in termination compartments

Pull-ring

SME-20 Power Fuse (Fault Fiter Electronic Power Fuse is similar)
SME-4Z Power Fuse
Figure 15 . Blown-fuse target locations for S&C Power Fuses used in PME models of S&C Pad-Mounted Gear .

26 S&C Instruction Sheet 665-610 .

Re-Fusing

Replacing a Blown Fuse
Complete the following steps when replacing a blown fuse:

STEP 1 .

Gain access to the blown S&C Power Fuse or suspect current-limiting fuse following the instructions found in the “Fuse AccessOpening” section on page 17.

STEP 2 .

Fault Fiter Electronic Power Fuses rated 25 kV should be removed from their mountings by hand using suitable protective equipment. Remove all other fuses as follows:
(a) Grasp a shotgun stick with both hands (approximately 2 feet (61 cm) apart), placing one hand on the shotgun-stick latch mechanism.
(b) Secure the shotgun stick tightly to the fuse pull-ring. See Figure 16.

NOTICE
Do not permit the end-fitting of an SME-4Z Power Fuse to strike the ground during the following removal process . The blown-fuse target may be damaged or become impacted with dirt and may not operate properly .

Figure 16 . A shotgun stick secured to a fuse pull-ring in preparation for unlatching the fuse .

. S&C Instruction Sheet 665-610 27

Re-Fusing

(c) Stand in a normal, upright position facing the shotgun stick. Unlatch the fuse with a short, outward pull on the fuse pullring. Then, remove the fuse from its mounting with an upward and outward lifting motion. See Figure 13 on page 23. When the fuse has been removed from the mounting, the TransFuser Mounting may be left with the live parts in the termination compartment and the doors may be closed.
Note: Take the blown fuse back to the service center for proper disposal.
NOTICE
Always store fuses in a clean, dry location . Do not store fuses in termination compartments unless the unit is equipped with the optional Fuse Storage feature . This feature accommodates a number of complete fuse assemblies–three SME Power Fuses, two Fault Fiter Electronic Power Fuses, or two currentlimiting fuses–per switch-termination compartment .
For storage, position the fuse with the silencer or trunnion at the bottom, and insert it into the bracket . Then, turn the fuse so that the pull-ring is out of the way of the cables .

STEP 3 .

Install a new fuse unit, refill unit, interrupting module, or current-limiting fuse in the end-fittings or holder as follows:
For S&C Power Fuses: Follow the instructions provided with each fuse unit, refill unit, or interrupting module for removal of blown SMU-20 Fuse Units, SM-4 Refill Units, or Fault Fiter fuse interrupting modules, and for insertion of replacements in the end-fittings or holders.
For current-limiting fuses: For instructions on replacing current-limiting fuses in current-limiting fuse holders, refer to S&C Instruction Sheet 660-501. These holders will accommodate the current-limiting fuses listed Table 2 of S&C Information Bulletin 660-50.

STEP 4 . Install the fuse in its mounting following the instructions found in the “Fusing” section on page 22.

28 S&C Instruction Sheet 665-610 .

To ensure the Micro-AT Source-Transfer Control is ready for automatic operation, make sure both SOURCE VOLTAGE indicating lamps and the automatic- transfer READY indicating lamp are illuminated. If the READY lamp is not lit, refer to the LCD screen on the faceplate of the Micro-AT control. When not being used to show menu information, this display shows messages explaining why the lamp is not lit.
Note: A lit READY lamp indicates the status of associated components is normal, but an absence of illumination does not necessarily mean the control is inoperative. For example, when transfer to the alternate source occurs, the lamp extinguishes but the control is ready for any subsequent programmed automatic operation required by a change in source conditions. Likewise, if the stored-energy operators are decoupled, the READY lamp is extinguished–and the switches will not operate–but the control is fully operative.
Close and padlock the access doors to the low-voltage control compartment and high-voltage compartments.

Final Checks Before Walking Away …

. S&C Instruction Sheet 665-610 29

If Operator Stalls …

The stored-energy operator’s quick-make quick-break mechanism will stall in a Partially Discharged state if the operator is inadvertently tripped while its associated Mini-Rupter Switch is prevented from closing by any of the following conditions:
The switch is not completely coupled (or decoupled) to switch operator.
The switch is blocked open by a mechanical cable interlock (applicable when that option is included).
The switch is blocked open by mechanical antiparalleling (applicable when that option is included).
The switch is locked open by a key interlock (applicable when that option is included).
To determine whether the quick-make quick-break mechanism has stalled, observe the switch-position indicator target. If the words “SWITCH OPEN” on the target appear slightly off-center and one or more letters are partially hidden from view in the target opening, then the mechanism is in a Stalled condition. See Figure 17.

Normal

Stalled

Figure 17 . Switch-position indicator target appears slightly off-center if mechanism is stalled .

30 S&C Instruction Sheet 665-610 .

If Operator Stalls …

Restore the stored-energy operator to a normal Latched Open condition after such an occurrence as follows:
STEP 1 . Make sure the MANUAL/AUTOMATIC operation selector switch is in Manual mode.

CAUTION

To guard against handle kickback during performance of this step and to avoid an injury, do not release grip on handle until latching has occurred . Failure to do so can result in personal injury .

STEP 2 .

Place the large notched end (with the recessed bolt) of the dual-purpose manual handle in the center of the decoupler. See Figure 18. (The handle’s knurled knob performs no function in this application.) While pivoting the handle, push it in to engage the reverse-drive hub. Then, rotate the handle counterclockwise for the left-hand switch (clockwise for the righthand switch) to back-drive the switch and the quick-make quick-break mechanism–against the tension of the stored-energy spring–until the mechanism latches in its Open position. A slight click may be heard when the mechanism latches.

STEP 3 .

Verify the Latched Open condition has been achieved by observing the switch- position target reads “SWITCH OPEN” and the operator targets read “OPERATOR IN SWITCH-OPEN POSITION” and “OPERATOR CHARGED.”

Figure 18 . Dual-purpose manual handle reverse-driving the Mini-Rupter Switch and operator’s quick-make quick-break mechanism to recover from a stalled condition .

. S&C Instruction Sheet 665-610 31

Maintenance

Components
No routine maintenance is required for the Micro-AT Source-Transfer Control. However, operational testing once per year in accordance with S&C Instruction Sheet 665-590 is recommended to verify proper functioning of the system.
No mechanical maintenance is required for S&C Pad-Mounted Gear. However, occasional inspection of the gear and exercising of the Mini-Rupter Switches is recommended.
The stored-energy operators should be given an exercising consisting of five or more operations at least once every year, unless normal operating duty provides equal or greater exercise. With the switches decoupled from the operators, exercising can be accomplished at any convenient time without requiring that the switches themselves be operated and, therefore, without requiring an interruption of service.
The nominal operating life of the stored-energy operators is 1500 operations (complete close-open cycles), provided that no more than 500 of such operations are performed while decoupled.

DANGER
When access to high-voltage compartments is required for inspection, service, or repairs, always observe the precautions below . Failure to observe these precautions will result in serious injury or death .
Access to pad-mounted gear must be restricted only to qualified persons . See the “Qualified Persons” section on page 2 .
Always follow safe operating procedures and rules .
Before touching any device, always disconnect switches, fuses, and other devices from all power sources (including backfeed) and control sources, test for voltage, and properly ground .
When external voltage is used to test any secondary-side wiring or devices, disconnect all voltage sensors to avoid energizing the highvoltage conductors through the voltage sensors . To disconnect the voltage sensors, transfer the input plug from the input receptacle to the shorting receptacle . See Figure 4 on page 11 .
Always assume both sets of power terminals on any switch or fuse are energized unless proved otherwise by test, by visual evidence of opencircuit conditions on both sets of terminals, or by observing both sets of terminals are grounded .
Test for voltage on both sets of power terminals of any switch or fuse using proper high-voltage test equipment .
After the gear has been completely disconnected from all sources of power and tested for voltage, install suitable grounding cables in all compartments .
For maintenance of non-S&C equipment, follow the manufacturer’s instructions .
Make sure the enclosure is properly grounded to the station or facility ground . Do not return equipment to service unless such grounds are properly made .
Note: Occasionally, low-voltage components may require maintenance . The maintenance of other low-voltage components isolated from highvoltage compartments may be performed under the safety rules for equipment rated 600 Volts or less . If maintenance is to be performed on devices connected to the secondary of a voltage sensor, short-circuit the secondary connections . A separate drawing will be provided with the replacement part explaining how to properly short-circuit the secondary connections .

These recommendations may differ from company operating procedures and rules . Where a discrepancy exists, users should follow their company’s operating procedures and rules .
32 S&C Instruction Sheet 665-610 .

Maintenance

Returning Equipment to Service
When returning the equipment to service, the following procedures should be observed:

STEP 1 . Make sure switch and fuse grounding means are removed.

STEP 2 . Make sure the Mini-Rupter Switches are in the correct position (Open or Closed) as dictated by system circumstances.

STEP 3 .

Close each door permitting access to high voltage. Make sure the associated PentaLatch Mechanisms are securely latched before energizing the circuit or operating any switching device.

STEP 4 . Make sure the input plug is on the input receptacle.

STEP 5 . Refer to the “Final Checks Before Walking Away” section on page 29.

STEP 6 . Close both low-voltage compartment doors and make sure the associated Penta-Latch Mechanism is completely latched and padlocked.

STEP 7 .

Padlock all doors before leaving the installation site, even momentarily. Observe this procedure even in those cases where the gear is accessible only to qualified persons.

Enclosure Finish
The responsibility for ensuring a finish protects the enclosure lies with both the manufacturer and the user. Source-transfer PME Pad-Mounted Gear is finished with the S&C Ultradur® II Outdoor Finish, which provides lasting protection for the enclosure. To retain this protection, the user should take periodic corrective action as follows:

STEP 1 .

Touch up any penetration of the finish to bare metal, such as scratches and abrasions caused by shipping or vandalism, to maintain the original integrity. S&C touch-up finish and primer are available in aerosol spray cans. See Table 16 in S&C Specification Bulletin 665-31 for catalog number information used for ordering. No other finish or primer is approved. The area to be touched up should be cleaned to remove all oil and grease. Sand the area, removing any traces of rust that may be present, and make sure all edges are feathered before applying primer.

STEP 2 .

Provide an occasional simple washdown, such as an automobile would be given, to remove surface contaminants. Use any ordinary mild household detergent solution.

In those cases where the enclosure must be refinished by the user before the finish has weathered–for example, to match other equipment–a special precaution must be taken. The entire surface must be sanded to provide a tooth to bond the new coat to the unusually tough and smooth Ultradur II Outdoor Finish.

. S&C Instruction Sheet 665-610 33

Preliminary Tryout
Preliminary Tryout Before Gear Is Energized — Optional
To expedite full service when high voltage is available, the user may want to perform a preliminary checkout of the Micro-AT Source-Transfer Control before the gear is energized. For this purpose an S&C Test Accessory is available to permit checkout of the source-transfer operation using an external single- phase 120-Vac source.
If a preliminary checkout is to be performed, special instructions must be followed to ensure correct operation of the Micro-AT control. These instructions are set forth in S&C Instruction Sheet 515-510, furnished with the test accessory. The programming and testing described in the “Field Adjustment and Programming” and “Operational Testing” sections in S&C Instruction Sheet 515-500 can be completed during the preliminary checkout.
When the test accessory is used, the control power available to supply the charging motors of the stored-energy operators and to maintain the charge on the solenoid-tripping capacitors is less than that available during normal three-phase operation. As a result, the time required for the motors to charge the stored-energy operators will be longer than normal. Furthermore, it may take as long as two minutes after the stored-energy operators are charged for the solenoid-tripping capacitors to become fully charged. Therefore, wait at least two minutes after the stored-energy operators are charged before initiating a transfer operation.
34 S&C Instruction Sheet 665-610 .

When high-voltage dielectric tests are to be performed on source-transfer PME Pad-Mounted Gear, special precautions should be taken to prevent damage to the voltage sensors and voltage limiters. Refer to S&C Instruction Sheet 591-500.

Dielectric Testing

. S&C Instruction Sheet 665-610 35

References

• S&C Electric Company

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