Transcript
S&C PME Pad-Mounted Gear
S&C Holders for Use with Current-Limiting Fuses
Outdoor Distribution (14.4 kV and 25 kV)
Installation Table of Contents Section
Page
Introduction Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Read this Instruction Sheet. . . . . . . . . . . . . . . . . . . . . . . Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . . . . . Proper Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 2 2 2 2
Safety Information Understanding Safety-Alert Messages. . . . . . . . . . . . . . 3 Following Safety Instructions. . . . . . . . . . . . . . . . . . . . . . 3 Replacement Instructions and Labels. . . . . . . . . . . . . . . 3
June 1, 2010© S&C Electric Company
Section
Page
Current-Limiting Fuses for Use in S&C PME Pad-Mounted Gear Current-Limiting Fuses Accommodated and Adapter Required. . . . . . . . . . . . 4 Recommended Voltage Ratings. . . . . . . . . . . . . . . . . . . . 5
Installing a Current-Limiting Fuse in the S&C Holder Installing the Adapter on the Fuse . . . . . . . . . . . . . . . . . . 6 Installing the Fuse in the Holder. . . . . . . . . . . . . . . . . . . . 7
Replacing a Blown Current-Limiting Fuse in the S&C Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Instruction Sheet 660-501
Introduction Qualified Persons
Ç WARNING The equipment covered by this publication must be installed, operated, and maintained by qualified persons who are knowledgeable in the installation, operation, and maintenance of underground electric power distribution equipment along with the associated hazards. A qualified person is one who is 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 the special precautionary techniques, personal protective equipment, insulating 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.
Read this Instruction Sheet
Thoroughly and carefully read this instruction sheet before installing or operating your S&C PME Pad-Mounted Gear. Familiarize yourself with “Safety Information” on page 3. The latest version of this instruction sheet is available online in PDF format at www.sandc.com. Select: Support/Product Literature Library.
Retain this Instruction Sheet
This instruction sheet is a permanent part of your S&C PME Pad-Mounted Gear. These instructions should be stored in the instruction manual holder.
Proper Application
Ç CAUTION The equipment in this publication must be selected for a specific application. The application must be within the ratings furnished for the equipment. Ratings for this gear are listed on the ratings label on the interior of the doors (right-hand doors only for double-door models).
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. In no event shall seller’s liability to immediate purchaser or end user exceed the price of the specific product which gives rise to 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, 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 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. The seller’s warranties do not apply if anything other than Fault Fiter® Electronic Power Fuses or selected current-limiting fuses are used in conjunction with S&C Fault Fiter Electronic Power Fuse Mountings and S&C Holders designed therefore, or if currentlimiting fuses are applied other than as set forth under “Current-Limiting Fuses for Use in S&C PME Pad-Mounted Gear,” in S&C Instruction Sheet 665-510.
2 S&C Instruction Sheet 660-501
Safety Information Understanding Safety-Alert Messages
There are several types of safety-alert messages which may appear throughout this instruction sheet as well as on labels attached to the S&C PME Pad-Mounted Gear. Familiarize yourself with these types of messages and the importance of the various signal words, as explained below.
Ç DANGER “DANGER” identifies the most serious and immediate hazards which will likely result in serious personal injury or death if instructions, including recommended precautions, are not followed.
Ç WARNING “WARNING” identifies hazards or unsafe practices which can result in serious personal injury or death if instructions, including recommended precautions, are not followed.
Ç CAUTION “CAUTION” identifies hazards or unsafe practices which can result in minor personal injury or product or property damage 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.
Following Safety Instructions
If you do not understand any portion of this instruction sheet and need assistance, contact your nearest S&C Sales Office or S&C Authorized Distributor. Their telephone numbers are listed on S&C’s website www.sandc.com. Or call S&C Headquarters at (773) 338-1000; in Canada, call S&C Electric Canada Ltd. at (416) 249-9171.
Ç DANGER Read this instruction sheet thoroughly and carefully before installing or operating your S&C Pad-Mounted Gear.
Replacement Instructions and Labels
If you need additional copies of this instruction sheet, contact your 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 your nearest S&C Sales Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
S&C Instruction Sheet 660-501 3
Current-Limiting Fuses for Use in S&C PME Pad-Mounted Gear Current-Limiting Fuses Accommodated and Adapter Required
S&C Holders for use in PME Pad-Mounted Gear will accommodate the single-barrel current-limiting fuses listed in the table below when the fuses are equipped with B\,-inch diameter mounting studs at both ends. Depending on the length of the currentlimiting fuse to be used, an adapter may be required in order to fit the fuse in the holder. The adapter, when required, is furnished with the S&C Holder and is signified by an “-A1” suffix to the catalog number of the holder. (See Figure 2 on page 7.) When the catalog number of the holder does not include a suffix, no adapter is required or provided.
CURRENT-LIMITING FUSES ACCOMMODATED IN FAULT FITER MOUNTINGS For Use in PME Models With Nominal Voltage Rating, kV
Current-Limiting Fuse1 Rating2 Manufacturer
Type
Kearney B Kearney Q
Cooper5
McGraw-Edison NX®
RTE® ELX
14.4
Combine Technologies Inc. X-Limiter™ Cutler Hammer CX Eaton5 Cutler Hammer CXN
Kearney B Kearney Q
Cooper 25
McGraw-Edison NX®
RTE® ELX Combine Technologies Inc. X-Limiter™ Eaton
Max Voltage, kV
Max Current Amperes, RMS
Requires S&C Holder3 Catalog Number4
8.3
30–112
3122-A1
8.3
6–100
3122-A1
15.5
6–100
3122-A1
8.3
1.5C–100C
3122-A1
15.5
1.5C–100C
3122-A1
8.3
3–50
3122-A1
15.5
3–50
3122-A1
8.3
12–140
3122-A1
15.5
12–140
3122-A1
8.3
3.5C–40C
3122-A1
15.5
4C–40C
3122-A1
8.3
60C–200C
3122
15.5
45C–100C
15.5
30–100
3123-A1
3122
22
25–65
3123-A1
15.5
6–100
3123-A1
15.5
1.5C–100C
3123-A1
6C–40C
3123-A1
15.5
3–50
3123-A1
23
3–40
3123-A1
15.5
12–100
3123-A1
23
12–40
3123-A1 3123-A1
23
Cutler Hammer CX
15.5
4C–40C
Cutler Hammer CXN
15.5
45C–100C
3123
1 Fuses must be furnished by others.
5 All 15.5-kV fuse types listed—except RTE ELX Current-Limiting
2 Maximum voltage and current ratings listed apply to the complete pad-
Fuses—when used in 14.4-kV Model PME-4, PME-5, PME-6, PME-9, PME-11, or PME-12 Pad-Mounted Gear furnished with Fault Fiter mountings, permit the gear to achieve a 25-kA short-circuit rating. Separable connectors and cables installed in the switch compartments must be rated 25,000 amperes, RMS, symmetrical. In addition, the gear cannot be furnished with optional 200-ampere bushing wells in lieu of 600-ampere bushings at the switch terminals, Catalog Number Suffix “-M4.”
mounted gear unit. Consult fuse manufacturer for complete fuse ratings.
3 Holders for 14.4-kV PME models are rated 14.4 kV nominal, 17.0 kV maximum, 200 amperes maximum. Holders for 25-kV PME models are rated 25 kV nominal, 29 kV maximum, 200 amperes maximum.
4 Includes adapter when required.
4 S&C Instruction Sheet 660-501
Current-Limiting Fuses for Use in S&C PME Pad-Mounted Gear Recommended Voltage Ratings
In general, current-limiting fuses should have a maximum voltage rating equal to, but not greater than 140% of, the system line-to-line voltage since, for most applications, the fuses can be exposed to full system line-to-line voltage in clearing faults. Although there may be economic or space-saving incentives for using current-limiting fuses with voltage ratings “appropriate for system line-to-ground voltage” (i.e., fuses with a voltage rating lower than line-to-line voltage but greater than or equal to maximum system line-to-ground voltage), S&C can only recommend such use in the following applications: • Protection of single-phase transformers serving single-phase loads. • Protection of three-phase lateral circuits fed by single-conductor shielded cable (provided that each transformer on the lateral is individually fused so that the currentlimiting fuse serving the lateral will not be required to clear secondary faults). • Protection of single-phase lateral circuits fed by single-conductor shielded cable where the load is line-to-ground connected.
S&C Instruction Sheet 660-501 5
Installing a Current-Limiting Fuse in the S&C Holder If the catalog number of the S&C Holder includes an “-Al” suffix, install the adapter furnished with the holder as instructed under “Installing the Adapter on the Fuse” below. If the catalog number of the holder does not include a suffix, no adapter is required to install the fuse in the holder. (See Figure 1.) In that case, proceed directly to “Installing the Fuse in the Holder” on page 7.
Installing the Adapter on the Fuse
If the catalog number of the S&C Holder includes an “Al” suffix, install the adapter on the fuse as follows:
Step 1 Loosen the C\,-inch stainless-steel hex-head bolts of the adapter and slip the adapter over the B\,-inch diameter stud at one end of the current-limiting fuse. See Figure 2 on page 7.) For fuses with blown-fuse indicators, install the adapter on the stud opposite the indicator and tighten the bolts securely. Depending on the length of the fuse, the adapter may have to be shortened in order to fit the fuse and adapter assembly in the S&C Holder. The length from the bottom of the fuse barrel to the top of the adapter should be 18 B\zn-inches for the 14.4-kV holder and 24Z\,-inches for the 25-kV holder. (See Figure 2.) If necessary, shorten the adapter by cutting off any excess length with a hacksaw. Remove any burrs from the sawed edge of the adapter.
Step 2 Install the fuse and adapter assembly in the holder as instructed under “Installing the Fuse in the Holder” on page 7.
Current-limiting fuse
B\,0 stud
Latch-end saddle
Pull-ring
C\,—1631Z\v bolt C\,0 lockwasher Trunnion-end clamp
C\,0 lockwasher
Latch-end clamp Trunnion-end saddle
S&C Holder, Catalog Number 3122
Figure 1. Installing a fuse requiring no adapter in S&C Holders, Catalog Number 3122.
6 S&C Instruction Sheet 660-501
C\,—1631Z\x bolt
Installing a Current-Limiting Fuse in the S&C Holder Installing the Fuse in the Holder
Refer to Figure 1 or 2, as appropriate, and install the current-limiting fuse in the S&C Holder as follows:
Step 1 If an adapter was installed on the fuse, make certain that the bolts of the adapter have been tightened enough to flatten the C\,-inch stainless-steel lockwashers under the bolt heads.
Ç WARNING When installing a Kearney Type Q fuse equipped with Kearney B\,-inch mounting-stud adapters with screw-type clamps, care must be taken to ensure that the clamps do not strike the edges of the opening when the TransFuser Mounting of the pad-mounted gear is operated; therefore, position the screw-type clamps of the Kearney B\,-inch mounting-stud adapters between the insulating rods of the holder.
Step 2 Unbolt the C\,-inch stainless-steel hex-head bolts of the trunnion-end and latch-end clamps of the holder and remove the clamps. Then set the fuse (with adapter, if used) in the trunnion-end and latch-end saddles of the holder and replace the clamps. For currentlimiting fuses with blown-fuse indicators, make sure that the indicator is positioned at the trunnion-end clamp.
Step 3 Tighten the bolts of the clamps so that the C\,-inch stainless-steel lockwashers under the bolt heads are flat.
18B\zn0 for 14.4-kV holder 24Z\,0 for 25-kV holder
Current-limiting fuse
C\,—1631Z\v bolt
Blown-fuse indicator
Adapter (cut off excess length as appropriate)
Latch-end saddle
Pull-ring
C\,—1631Z\v bolt (14.4 kV) C\,—1631C\v bolt (25 kV) C\,0 lockwasher Trunnion-end clamp
C\,0 lockwasher
Latch-end clamp
C\,—1631Z\x bolt Trunnion-end saddle
S&C Holder, Catalog Number 3122-A1 or 3123-A1
Figure 2. Installing a fuse requiring an adapter in S&C Holders, Catalog Numbers 3122-A1 and 3123-A1.
S&C Instruction Sheet 660-501 7
Replacing a Blown Current-Limiting Fuse in the S&C Holder
Ç WARNING When installing a Kearney Type Q fuse equipped with Kearney B\,-inch mounting-stud adapters with screw-type clamps, care must be taken to ensure that the clamps do not strike the edges of the opening when the TransFuser Mounting of the pad-mounted gear is operated; therefore, position the screw-type clamps of the Kearney B\,-inch mounting-stud adapters between the insulating rods of the holder.
Step 1 If no adapter was used to install the fuse in the S&C Holder and the replacement fuse is the same length as the blown fuse, replace the blown fuse as follows: a. Unbolt the C\,-inch stainless-steel hex-head bolts of the trunnion-end and latch-end clamps of the holder and remove the clamps. (See Figure 1 on page 6.) Then remove the blown fuse from the holder and discard the fuse. b. Set the replacement fuse in the trunnion-end and latch-end saddles of the holder and replace the clamps. For current-limiting fuses with blown-fuse indicators, make sure that the indicator is positioned at the trunnion-end clamp. c. Tighten the bolts of the clamps so that the C\,-inch stainless-steel lockwashers under the bolt heads are flat.
Step 2
a. Unbolt the C\,-inch stainless-steel hex-head bolts of the trunnion-end and latch-end clamps of the holder and remove the clamps. (See Figure 2 on page 7.) Then remove the fuse and adapter assembly from the holder. Loosen the C\,-inch stainless-steel hexhead bolts of the adapter and remove the adapter from the fuse. Discard the blown fuse. b. If the replacement fuse is a Westinghouse Type CXN fuse rated 8.3 kV (60C-200C amperes) or 15.5 kV (45C-100C amperes) for installation in 14.4-kV PME Pad-Mounted Gear, no adapter is required. Otherwise, slip the adapter over the B\,-inch diameter stud at one end of the replacement current-limiting fuse. For fuses with blown-fuse indicators, install the adapter on the stud opposite the indicator and tighten the bolts securely. Depending on the length of the fuse, the adapter may have to be shortened in order to fit the fuse and adapter assembly in the S&C Holder. The length from the bottom of the fuse barrel to the top of the adapter should be 18 B\zn-inches for the 14.4-kV holder and 24Z\, inches for the 25-kV holder. (See Figure 2.) If necessary, shorten the adapter by cutting off any excess length with a hacksaw. Remove any burrs from the sawed edge of the adapter. c. If an adapter was installed on the fuse, make certain that the bolts of the adapter have been tightened enough to flatten the C\,-inch stainless-steel lockwashers under the bolt heads. d. Set the replacement fuse (with adapter, if used) in the trunnion-end and latch-end saddles of the holder and replace the clamps. For current-limiting fuses with blown-fuse indicators, make sure that the indicator is positioned at the trunnion-end clamp. e. Tighten the bolts of the clamps so that the C\,-inch stainless-steel lockwashers under the bolt heads are flat. If the replacement fuse is shorter than the blown fuse, a new adapter is required. (The length of the current-limiting fuse may be different if a higher or lower ampere rated fuse is used.) Refer to the nearest S&C Sales Office for assistance.
Ç CAUTION Following a two- or three-phase fault at a three-phase installation, any unblown companion current-limiting fuses that carried the fault current should also be replaced.
8 S&C Instruction Sheet 660-501
Printed in U.S.A.
If an adapter was used to install the fuse in the S&C Holder and the replacement fuse is the same length as or longer than the blown fuse, replace the blown fuse as follows:
