How it Works
Southern States
Loading...
CSH
User Manual
9 pgs82.42 Kb0
Table of contents
Loading...

Southern States CSH User Manual

Download
Southern Stat es – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers
Title:
TABLE OF CONTENTS
3.01 General .................................................................................................................. 2
3.02 Service Conditions ................................................................................................. 2
3.03 Ratings ................................................................................................................... 3
3.04 Interrupter .............................................................................................................. 3
3.05 Insulators ............................................................................................................... 4
3.06 Terminal Pads ........................................................................................................ 4
3.07 Operating Mechanisms .......................................................................................... 4
3.08 Ground Pads .......................................................................................................... 6
4.01 Wiring ..................................................................................................................... 6
4.02 Bearings ................................................................................................................. 6
4.03 Bases ..................................................................................................................... 6
4.04 Interphase Bracing ................................................................................................. 6
4.05 Operating Linkage .................................................................................................. 7
4.06 Support Structure ................................................................................................... 7
6.01 Mechanical Operation ............................................................................................ 7
6.02 Leak Test
6.03 Resistance Tests ................................................................................................... 8
6.04 Dielectric Tests ...................................................................................................... 8
8.01 Approval Drawings ................................................................................................. 8
8.02 Final Drawings ....................................................................................................... 8
8.03 Instruction Books ................................................................................................... 8
8.04 Additional Documentation ...................................................................................... 9
............................................................................................................... 7
Product Specification Guide
PAGE
Page 1 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers
Product Specification Guide

1.0 SCOPE This specification covers the design, manufacture, and testing of three pole, gang

operated horizontal interrupter outdoor circuit switchers available with or without integral motor operated vertical break disconnect switches.

2.0 STANDARDS The outdoor circuit switchers shall be designed, manufactured, assembled, and tested

in accordance with the latest applicable ANSI, NEMA, and ASTM standards and guidelines. If there are any conflicts between the ANSI, NEMA, or ASTM standards and this specification the specification shall govern.

3.0 DESIGN REQUIRE MENTS

3.01 General

All control components required to operate the circuit switcher shall be mounted at a height readily accessible from ground level without the use of elevating devices.

3.02 Service Conditions

The circuit switcher shall be suitable for outdoor installation in electric power substations under the fol l owing conditions:

3.02.01 Temperature The circuit switcher shall perform in an ambient temperature range of

-40oC through +40oC for 170 kV and below units and –30oC through
o
C for 245 kV units.(Consult factory for ratings outside the limits
+40 stated)

3.02.02 Altitude The circuit switcher shall perform at elevations up to 3,300 feet.

3.02.03 Seismic The circuit switcher shall be capable of withstanding seismic loading of

0.2 g ground acceleration in any direction when installed on the manufacturer’s furnished support structure and anchor bolts and with flexible connections to the terminal pads. The device shall perform its specified functions during and after the seismic event.

3.02.04 Wind Loading The circuit switcher shall be capable of withstanding wind loads up to 90 mph without loss of function.

3.02.05 Additional Requirements If any site specific service conditions not covered in sections 3.02.01 through 3.02.04 exist (e.g. extreme cold temperature installation,

Page 2 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers
900/900
Maximum System Fault Rating **
Rated Short Time (3 sec) Withstand
Number of Mechanical Operations
Product Specification Guide
corrosive environment, high altitude installation, etc.) they will be defined in the quotation request.

3.03 Ratings

3.03.01 Electrical

Maximum Voltage (kV) 38 48.3 72.5 123 145 170 245 Interrupter/Blade BIL (kV) 350/200 350/250 350/350 550/550 750/650 750/750 Continuous Current
20 kA, 25 kA, 31.5 kA, or 40 kA 20 kA
Fault Closing 10 time 40 kA, 15 time 31.5 kA, 30 time 20 kA
1200 A, 1600 A or 2000 A*
40 kA RMS
2000

“* Consult factory for availability of 2000 A

** Maximum Fault Ratings assume a 3 ohm line to source impedance

3.03.02 Additional

1. Rated Interrupting Tim e 5 cycles for 170 kV and below 6 cycles for 245 kV
2. Rated Duty Cycle O-15 sec-CO-15 sec-CO

3.03.03 Source Supply Voltages Purchaser will supply the following sources for the motor, auxiliary, and control circuits:

1. Motor Voltage 48 VDC or 125 VDC
2. Auxiliary Voltage 120 / 240 VAC, 60 Hz, 1∅
3. Control Voltage 48 VDC or 125 VDC

3.04 Interrupter The circuit switcher shall use SF6 single gap puffer interrupters. Each interrupter shall be provided with a color-coded density gauge, an overpressure relief device, and a gas fill port. Arc assist type interrupters are not acceptable. Hermetically sealed interrupters are not acceptable due to the inherent dangers to purchaser’s personnel associated with handling fully pressurized SF6 devices during installation and also due to potential hazards encountered during transportation and offloading.

Page 3 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers

3.05 Insulators The circuit switchers shall be supplied with manufacturer furnished insulators in accordance with the following table. The insulators shall be ANSI 70 gray in color and porcelain in construction.

Voltage Class TR Number of the Required Insulator
38.0 kV TR 231
48.3 kV TR 267
72.5 kV
123 kV TR 286 145 kV TR 288 170 kV TR 291 245 kV TR 304
Product Specification Guide
TR 276 on the non-rotating stacks
TR 278 on the rotating stacks

3.06 Terminal Pads Terminal pads shall be unplated aluminum with 4 hole NEMA drilling pattern for use with purchaser furnished terminal connectors. The terminal pads on both ends of the circuit switcher shall be at the same elevation above the circuit switcher base.

3.07 Operating Mechanisms

3.07.01 Shunt Trip Mechanisms

Each circuit switcher shall be provided with a spring stored energy shunt trip mechanism per phase located under the rotating insulator stack to provide high speed tripping. A single stored energy mechanism located at ground level is not acceptable.

3.07.02 Motor Operating Mechanism

A rotational output mot or operating mechanism shall be provided to reset the opening and closing springs and to open and close the vertical break disconnect switch blades on models furnished with disconnect switch blades. Reciprocating outp ut oper ating mechanisms are not ac ceptable. The motor operating mechani sm s hall oper at e from full open to full closed in 8 seconds, from full closed to full open in 8 seconds, and shall generate 32,000 inch-pounds of output torque. The operating mechanism shall be capable of being padlocked in both the open and the closed positions. The ability to recouple in an incorrect position shall be positively prevented. The motor operator shall be Southern States
Page 4 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers
type CM-4AE or approved equal and shall provide the following accessories in an all-aluminum enclosure:
1. Electric motor
2. Open-Close push buttons
3. Reversing contactor
4. Anti-pump relay
5. Time delay relay
6. Local-remote selector s witch
7. 12 stage adjustable auxiliary switch (eight stages [contacts] of which shall be available for purchaser use)
8. Thermostatically controlled 100 watt cabinet heater
9. Fused pullouts for protec ti on o f motor cir cui t and heater circuit
10. Decoupler for vertical pipe
11. Manual crank handle (Insertion of handle shall automatically disconnect the motor circuit)
12. Position indicating lights (green=open, red=closed)
13. Operations counter
14. 120 VAC cabinet light with toggle switch
15. Front and right side hinged, removable doors
Product Specification Guide

3.07.03 Hinge Assemblies

(Supplied on vertical break disconnect switch model circuit switchers) The hinge assembly on each phase shall consist of a sealed threaded
current transfer path and a counterbalance spring to allow the disconnect blades to be under full positive control during opening and closing operations.

3.07.04 Switch Blades

(Supplied on vertical break disconnect switch model circuit switchers) The switch blades shall be tubular aluminum with a removable tin plated
copper contact plate having 15 mils brazed silver inserts. The blade contact plate and the contact fingers shall be supplied with silvers of differing hardness so that galling does not occur. The switch blades shall have a rotating motion upon opening to release contact pressure and upon closing to engage contact pressure, to wipe the stationary jaw contacts clean of any contaminants, and to break any accumulated ice build-up. The interrupter shall open before the disconnect switch blade opens and shall close after the disconnect switch blade closes, thus making and breaking the circuit in an SF6 environment. Circuit switchers that make the circuit on the switch blades are not acceptable.
Page 5 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers

3.07.05 Stationary Jaw Contacts

(Supplied on vertical break disconnect switch model circuit switchers) All stationary jaw contacts shall consist of formed copper contact fingers
of the reverse loop type so that during short circuit conditions that exceed the interrupting rating of the circuit switcher the reverse loop design produces high levels of opposing magnetic force in the fingers, providing increased contact pressure to hold the disconnect blades in the closed position. The current transfer surfaces on the contact fingers shall consist of 15 mils brazed silver inserts. All contact fingers shall be field replaceable. The contact fingers shall be backed by stainless steel springs that are outside of the current path.

3.08 Ground Pads Two NEMA 2 hole ground pads shall be supplied for grounding the structure to the station ground grid.

4.0 MANUFACTURING REQUIREMENTS

Product Specification Guide

4.01 Wiring Wiring shall be:

1. Point-to-point without splices or tee connections.

2. Bundled using cable ties.

3. Clearly identified with permanently affixed markers.

4. Sized per NFPA-70 ex cept being No. 14 AWG.

4.02 Bearings The rotating insulator stack bearings and the outboard bearing shall be maintenance-free, double row, sealed automotive ball type.

4.03 Bases The circuit switcher bases shall be constructed of rectangular steel tube to provide rigid stability and shall be hot dipped galvanized after fabrication. Double channel bases or girder style bases are not acceptable. The rectangular steel tubes shall be enclosed on the ends to birdproof the bases against nesting. Open style bases are not acceptable. The rectangular steel tubes shall be provided with welded mounting clips for rigid attachment of the bases to the support structure.

4.04 Interphase Bracing Hot dipped galvanized steel channels shall be provided as interphase bracing and shall be sized by the manufacturer based upon the operational loads of the circuit switcher.

Page 6 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers

4.05 Operating Linkage The vertical operating pipe, interphase pipe, and drive pipe shall be galvanized steel and shall be sized as required by the manufacturer to provide reliable operation of the circuit switcher and to prevent deflection and pipe sag.

4.06 Support Structure Each circuit switcher shall be provided with a manufacturer supplied support structure consisting of one vertical column (mounting pedestal) for 38 kV through

72.5 kV units furnished with 5 foot or narrower phase spacing. Two vertical columns (mounting pedestals) shall be supplied for all 72.5 kV units furnished with greater than 5 foot phase spacing, all 123 kV and 145 kV blade model units, and all 123 kV through 245 kV non-blade model units. The 170 kV and 245 kV blade model circuit switchers shall be supplied with three vertical columns (mounting pedestals). All ratings of both model types shall be supplied with a unitizing support frame except the 170 kV and 245 kV blade model units, which shall be furnished with structural support braces in a “Y” configuration. The mounting pedestals shall be hot dipped galvanized tubular steel. The frame members and/or structural support braces shall be hot dipped galvanized steel. Unless otherwise specified in the quotation request anchor bolts will be provided by the purchaser. All anchor bolts shall be sized as required for the operational loads generated by the circuit switcher. The manufacturer shall determine anchor bolt sizing and anchor bolt plan details when providing the anchor bolts.
Product Specification Guide

5.0 DESIGN TESTS The circuit switcher shall be design tested in accordance with ANSI C37.09-2001. The

testing shall include a dielectric test, a power test, a continuous current test, and a mechanical endurance test. The dielectric test shall include 60 Hz power frequency, lighting impulse withstand, and visual corona. The power test shall include short circuit interrupting, fault closing, and short time withstand.

6.0 PRODUCTION TESTS Each circuit switcher shall be fully assembled as a three-phase unit at the fac tor y,

adjusted, tested, and ti med per AN SI C3 7.0 9 s ect ion 5. The tests shall include:

6.01 Mechanical Operation

There shall be at least 50 mechanical operations performed at the f ac tor y. Timing tests along with opening and closing operations at minimum and maximum operating voltage shall be recorded.

6.02 Leak Test

An SF6 leak test shall be performed to confirm the leak rate is less than 0.5% per year.
Page 7 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers

6.03 Resistance Tests

6.03.01 Current Path Resistance Test A terminal-to-terminal micro-ohm resistance check shall be performed on each interrupter using a 100 A DC source and the values shall be recorded.

6.03.02 Heater Resistance Test The resistance of each heater shall be confirmed to be within specifications and the values shall be recorded.

6.04 Dielectric Tests

6.04.01 Control Circuit Dielectric Test The completely assembled and wired operator control circuit shall pass a dielectric test of 1500 V for 1 minute.

6.04.02 Interrupter Dielectric Test Each interrupter shall pass a power frequency withstand test at 60 Hz for one minute. The required test value shall be at least three times rated line-to-ground voltage.

Product Specification Guide

7.0 SPARE PARTS No spare parts shall be required to be purchased at the time of circuit switcher

purchase. Stock shall be maintained at the manufacturer available for rush shipment in the event of an emergency need.

8.0 DOCUMENTATION REQUI REMENTS

8.01 Approval Drawings

The manufacturer shall furnish approval drawings in AutoCAD .DWG format via e-mail. The purchase order will designate the name and e-mail address of the individual where the drawings should be forwarded. If there are no comments to the approval drawings purchaser will respond via e-mail that drawings are approved as submitted with no changes. If comments are required then one copy of the drawings will be returned to the manufacturer within 10 days from the date of transmittal marked “approved with comments as noted”.

8.02 Final Drawings

The manufacturer shall furnish final drawings in AutoCAD .DWG format via e­mail. Unless otherwise specified in the purchase order, the final drawings will be forwarded to the same individual that the approval drawings were sent to.

8.03 Instruction Books

The manufacturer shall furni sh an el ect r onic copy of each applicable instr ucti on book in Adobe Acrobat .PDF format via e-mail. Unless otherwise specified in the
Page 8 of 9 Publication No.: PSG-803-032615
Title: Southern States – CSH & CSH-B
Horizontal Interrupter Style Circuit Switchers
Product Specification Guide
purchase order, the instruction book(s) will be forwarded to the same individual that the approval drawings were sent to.

8.04 Additional Documentation

One complete set of final drawings and one copy of each applicable instruction book shall be shipped in a weatherproof envelope with each circuit switcher.

9.0 SHIPPING and DELIVERY The circuit switcher shall be match-marked and disassembled as necessary to

accommodate shipping dimensional clearance restrictions or shipped assembled on its common subframe. The circuit switcher phases shall be shipped fully assembled on insulators, minimizing the amount of field installation time required. Each interrupter shall be shipped with a positive pressure of 5 – 10 psi of SF6, eliminating the need to pull a vacuum on the interrupters in the field. An SF
fill kit shall be provided to fill each
6
interrupter to rated pressure during installation.

10.0 WARRANTY

All circuit switchers and their accessories furnished under this specification shall be covered by a five-year warranty from date of shipment against failure due to design or to defects in workmanship or material.

11.0 SPECIFIC QUOTE REQUIREMENTS

Information furnished by purchaser at time of quote request will include:

1. Model type (blade or non-blade)

2. kV rating

3. Continuous current rating .

4. Maximum System Fault Avai l able

5. Motor / Control voltage (48 VDC or 125 VDC)

6. Heater voltage (120 VAC or 240 VAC)

7. Mounting pedestal he ight

8. Phase spacing

9. If manufacturer is to supply anchor bolts

10. Additional requirements, if applicable (see section 3.02.05)

12.0 ACCEPTABLE CIRCUIT SWITCHER

Supply Southern States type CSH (non-blade model) or CSH-B (blade model) or acceptable equal. Any equal proposed must meet or exceed this speci fication.
Page 9 of 9 Publication No.: PSG-803-032615
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use