Power Transmission & Distribution

SDV6Distribution Circuit BreakerTop Performance - Proven Reliability

Table of Contents

Introduction . . . . . . . . . . . . . . . . .02 –04

3AH3 Stored-EnergyOperating Mechanism . . . . . . . . . . . .05

Vacuum Interrupters . . . . . . . . . . . . . .06

Ratings and Control Voltages . . . . . . .07

Dimensions 15kV-27kV . . . . . . . . . . . .08

Dimensions 38kV . . . . . . . . . . . . . . . . .09

Request for Quotation . . . . . . . . . . . .10

1

The SDV6 family is the latest generation of the successful SDVproduct line. Ratings have been expanded and the highly reliable3AH operators are now available. With over 7,000 SDV units and350,000 3AH operators in service, you can rely on Siemens products to serve your customers. The SDV6 product line is segregated into three voltage groups: 15.5kV, 27.6kV and 38kV.Each group is specifically designed to optimize space and materialfor the voltage class while retaining common features across theentire product line.

Siemens SDV6 Distribution Vacuum Circuit Breaker The SDV6 family is the latest generation of the successful SDVproduct line. Ratings have been expanded and the highly reliable3AH operators are now incorporated. With over 7,000 SDV units and350,000 3AH operators in service, you can rely on Siemens productsto meet your distribution system demands. The SDV6 product lineencompasses three voltage groups: 15.5kV, 27.6kV and 38kV. Eachgroup is specifically designed to optimize space and material for thevoltage class while retaining common features across the entireproduct line.

SDV6 Distribution Circuit Breaker

2

Ratings Available:15.5kV20kA or 25kA1200A or 2000A110kV BIL

15.5kV31.5kA or 40kA1200A, 2000A or 3000A110kV BIL

27.6kV20kA or 25kA1200A or 2000A150kV BIL

38kV20kA, 25kA, 31.5kA, or 40kA1200A or 2000A200kV BIL

Standard Features:¥ 3AH3 operator mechanism¥ Trip and close coil¥ Visual circuit breaker status window¥ Operations counter¥ Mechanical position indicator¥ External pull-to-trip handle¥ Generous relay and metering space¥ Hinged panel for relays or devices ¥ Necessary terminal blocks and wiring¥ Fused knife-switch control

voltage disconnects¥ Porcelain dry-type roof bushings¥ Bolted cabinet construction¥ Permanent lifting eyes (2)¥ Adjustable galvanized legs (4)¥ Corrosion resistant powder paint finish

(ANSI-61 light gray)¥ Stainless steel external ground pads (2)¥ Stainless steel external hardware¥ Cabinet heaters to prevent condensation¥ Filtered ventilation¥ ANSI rain tested design (per ANSI

C37.20.2 1999)

Standards:The SDV6 meets the following standards:¥ IEEE C37.04-1999 Rating Structure for

A-C HV Circuit Breakers¥ IEEE C37.09-1999 Test Procedure for A-C

HV Circuit Breakers¥ IEEE C37-06-200X Draft 7.8 (September

2006) Preferred Ratings A-C HV Circuit Breakers

¥ NEMA SG-4-2000 A-C HV Circuit Breakers

3

Seismic:When specified, the SDV6 distributionvacuum circuit breaker can be providedwith the capability of maintainingstructural integrity during and following aseismic disturbance, as appropriate forthe specified UBC zones 1-4.

Options:¥ Terminal connectors for bushings¥ Terminal connectors for ground¥ Current transformers (up to 2/bushing)¥ Capacitor trip unit for AC tripping supply¥ Second trip coil¥ Undervoltage trip device¥ Additional auxiliary switch contacts¥ Siemens 7SJ SIPROTEC protective relay¥ Other protective relays¥ Circuit breaker control switch with

indicating lights¥ Local / remote or toggle switches¥ Additional heaters for -40oC application¥ 1/2 voltage heaters¥ Adjustable thermostat¥ Seismic capability (IEEE 693 high level)¥ Interior convenience outlet (GFCI)¥ Interior light with switch¥ Molded case circuit breakers in lieu of

fused knife switches¥ Wire markers

Maintenance Interval:If applied under ANSI Òusual serviceÓconditions, maintenance is only needed at5 years / 10,000 operations on any circuitbreaker in an outdoor application.

Circuit Breaker:Siemens has been manufacturing mediumvoltage vacuum circuit breakers for over 30years and currently has over 350,000vacuum circuit breakers in service through-out the world. Siemens designs, develops,and tests circuit breaker operators andinterrupters at its circuit breaker Center ofCompetence in Berlin, Germany. Design(type) short-circuit tests are performed atindependent power test laboratories.Design control of the operating mechanismis maintained from Berlin to assure thatcircuit breakers assembled at any of theregional manufacturing centers will meet theperformance requirements of the design.

Operator:The 3AH3 circuit breaker operator is adurable and reliable stored-energymechanism. This operator will performup to 10,000 operations before overhaul,and the basic operator has a MTBF of8,700 years (as of 2004).

4

Top PerformanceProven Reliability

3AH3 Stored-Energy Operating Mechanism

The SDV6 outdoor distribution circuitbreaker utilizes the 3AH3 stored-energyoperating mechanism. The 3AH3 is thelatest member of the 3A operator family, ofwhich over 350,000 units are in serviceworldwide in vacuum circuit breakers. Over 60,000 3AH3 operators are in service.

The 3AH3 operator builds on the vastexperience with the 3A family ofoperating mechanisms. Improvements inthe operator have been incorporated toimprove service life and simplifymaintenance. Newer lubricants andalternative bearing materials have beenselected to reduce the chance forinteraction between the lubricants andthe metals to assure long service life.Mounting provisions for devices, such asthe opening latch, closing latch, andsimilar items, are designed for one person

removal and installation, even though it isunlikely that the user will ever need to doso. Reusable spring clips are used forpivot pins, avoiding the need for specialremoval tools or a supply of specialpurpose retainers during maintenance.

An option for faster opening time for theoperator has been incorporated, whichdecreases interrupting time from thestandard 5-cycle (83ms) interrupting timeto an optional 3-cycle (50ms) interruptingtime. This option is only available if thetripping power supply voltage is 48Vdc,125Vdc, 250Vdc, or capacitor trip.

The 3AH3 operator is a true stored-energyoperating mechanism. Closing springs arecharged electrically immediately followinga closing operation, and the openingspring is charged by the rotation of thecircuit breaker main shaft during theclosing operation.

The spring charging mechanism is a gear-drive design. Compared to a ratchet-and-pawl mechanism, the 3AH3 operator isquieter and exhibits longer mechanical life.The estimated total mechanical enduranceof the operator is 60,000 operations withoverhaul and vacuum interrupterreplacement at 10,000 operations.

The recommended maintenance intervalfor the operating mechanism is 5 years or10,000 operations, whichever occursfirst, when used in the ANSI/IEEE Òusualservice conditionsÓ.

The entire SDV6 family, from 15.5kVthrough 38kV, uses the same basic type3AH3 operating mechanism. Theoperators differ only in elements relatedto the design voltage or interruptingrating of the circuit breaker. Thecomponents which differ according torating include: the main rotating shaft,contact pressure springs, closing spring,opening spring, and pushrods, as well asthe high voltage elements, such as:interrupter, standoff insulators, andsimilar items.

Operator Elements,Controls, and Indicators1. Spring charging gearbox2. Closing spring3. Opening spring4. Main rotating shaft5. Contact pressure spring6. Opening operation shock absorber7. Spring charging motor8. Manual spring charging access port9. OPEN / CLOSE indicator10. CHARGED / DISCHARGED indicator11. Mechanical operation counter12. Spring release (CLOSE) coil13. Manual CLOSE pushbutton14. Trip coil15. Manual OPEN (trip) pushbutton16. Auxiliary switch17. Anti-pump relay

8 13

1

9

10

2

11 36745 5

17

15

1412

16

Over 350,000 3A operatorsin service on vacuum circuit

breakers worldwide

5

VacuumInterrupters

At the heart of the medium voltagecircuit breaker are the vacuuminterrupters. Siemens vacuuminterrupters use chrome-copper contactmaterial, which keeps the choppingcurrent to 5 amperes or less and therebykeeps overvoltages to a minimum.

For 15.5kV and 27.6kV circuit breakers upto 25kA, radial magnetic field contactsare used to force high current (>10kA)arcs to rotate rapidly around the contactsurfaces to reduce contact erosion.

For 15.5kV 31.5kA and 40kA and all 38kVcircuit breakers, axial magnetic fieldcontacts are used, which force the arc toremain diffused, thus preventing excesscontact erosion.

The Siemens interrupter will interrupt upto 100 full rated faults (depending onrating) before replacement is necessary.An external contact-wear indicator isprovided to directly determine the wearof the contacts within the interrupter.

Stationary terminal connection

Internal arc shieldInsulatorStationary contact

Moving contact

Metal bellows

Guide bushing

Moving contact connection

6

Ratings

Table Type SDV6 Circuit Breaker Control Data

CircuitBreaker

Type

Rated Maximum

Voltage

Rated Withstand Voltages

RatedShort-

Circuit andShort-Time

Current

Rated Interrupting

Time1

Rated Continuous

Amperes

Rated Transient Recovery Voltage2

Rated Permissible

Tripping Delay Time

Y

Rated Closing

and LatchingCurrent

LightningImpulse

(BIL)

Power Frequency

uc TRVPeak Value

t3 Time toVoltage uc

kV, rms kV4 kV kA, rms ms / cycles A, rms kV us sec kA, peak

15.5-20 15.5 110 / 142 50 20 83 / 5 1200, 2000 29.2 32 2 52

15.5-25 15.5 110 / 142 50 25 83 / 5 1200, 2000 29.2 32 2 65

15.5-31.5 15.5 110 / 142 50 31.5 83 / 51200,2000,

300029.2 32 2 82

15.5-40 15.5 110 / 142 50 40 83 / 51200,2000,

300029.2 32 2 104

27.6-20 27.6 150 / 194 60 20 83 / 5 1200, 2000 52.1 45 2 52

27.6-25 27.6 150 / 194 60 25 83 / 5 1200, 2000 52.1 45 2 65

38-20 38 200 / 258 80 20 83 / 5 1200, 2000 71.7 59 2 52

38-25 38 200 / 258 80 25 83 / 5 1200, 2000 71.7 59 2 65

38-31.5 38 200 / 258 80 31.5 83 / 5 1200, 2000 71.7 59 2 82

38-40 38 200 / 258 80 40 83 / 5 1200, 2000 71.7 59 2 104

NominalRange Close Coil Trip Coil3 Spring Charging Motor

Close Trip A AAmperes Run

(Avg.)Charging Seconds

48Vdc 36 - 56 28 - 56 2.1 11.4 / 30 8 10

125Vdc 90 - 140 70 - 140 1.0 5.4 / 7.4 4 10

250Vdc 180 - 280 140 - 280 0.5 2.1 / 4.2 2 10

120Vac 104 - 127 104 - 127 0.9 --- 6 10

240Vac 208 - 254 208 - 254 0.4 --- 3 10

1 Optional 50ms (3 cycles) with 48Vdc, 125Vdc or 250Vdc trip voltage or capacitor trip.2 TRV values are in accord with IEEE C37.06-200X, Draft 7.8 (Sept., 2006). TRV peak value uc is roughly equal to historic E2 value in ANSI C37.06-2000.

Value t3, time to voltage uc, is approximately 1/1.138 times the T2 value in ANSI C37.06-2000.3 First value is for standard 83ms / 5-cycle interrupting time. Second value is for optional 50ms/3-cycle interrupting time. See note 1.4 First value is full-wave impulse withstand circuit breaker open or closed. Second value is chopped-wave impulse withstand, applicable only with circuit

breaker closed.

7

Dimensions in Inches 15.5kV - 27kV

Rating A B C D E F G (Min.) G (Max.) H I J

15.5kV upto 2000A

10.8 13.0 48.0 58.5 28.2 15.9 105.8 129.4 44.1 39.9 44.0

15.5kV3000A

12.2 15.7 56.2 63.7 28.2 21.3 105.8 129.4 44.1 39.9 52.3

All 27.6kV

12.2 15.7 56.2 63.7 29.1 21.2 105.8 129.4 44.1 39.9 52.3

C

A B

J

I

E F

D

H

G

HVCompt.

OperatorCompt.

ControlCompt.

8

9

C

A B

J

I

E F

D

H

G

Rating A B C D E F G (Min.) G (Max.) H I J

All38kV

17.7 19.7 75.2 78.5 45.2 24.3 122.2 145.8 71.5 63.5 67.2

Dimensions in Inches 38kV

HVCompt.

OperatorCompt.

ControlCompt.

Request forQuotation

When requesting a quotation for a SDV6distribution circuit breaker, please fax thefollowing data to (919) 365-2525:

Sales / Agent: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Engineer: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Bid Date: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Customer RFQ: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

End User: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Substation: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Location: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Voltage kV: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Interrupting kA: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Continuous Current Amperes: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

BIL kV: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Motor Voltage: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Close Voltage: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Trip Voltage: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Heater Voltage: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Number of Relaying BCTs: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ratio: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Accuracy: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Number of Metering BCTs: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Ratio: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Accuracy: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Standard Includes:¥ 3AH3 operator mechanism¥ Trip and close coil¥ Visual circuit breaker status window¥ Operations counter¥ Mechanical position indicator¥ External pull-to-trip handle¥ Generous relay and metering space¥ Hinged panel for relays or devices ¥ Necessary terminal blocks and wiring¥ Fused knife switch disconnects¥ Porcelain dry-type roof bushings¥ Bolted cabinet construction¥ Permanent lifting eyes (2)¥ Adjustable galvanized legs (4)¥ Corrosion resistant powder paint finish

(ANSI-61 light gray)¥ Stainless steel external ground pads (2)¥ Stainless steel external hardware¥ Cabinet heaters to prevent condensation¥ Filtered ventilation¥ ANSI rain tested design (per ANSI

C37.20.2 1999)

Ratings Available: 15.5kV20kA or 25kA1200A or 2000A110kV BIL

15.5kV31.5kA or 40kA1200A, 2000A or 3000A110kV BIL

27.6kV20kA or 25kA1200A or 2000A150kV BIL

38kV20kA, 25kA, 31.5kA, or 40kA1200A or 2000A200kV BIL

Options Include: (Please mark desired)o Terminal connectors for bushings

o Terminal connectors for ground

o Current transformers (up to 2/bushing)

o Capacitor trip unit for AC tripping supply

o Second trip coil

o Undervoltage trip device

o Additional auxiliary switch contacts

o Siemens 7SJ SIPROTEC protective relay

o Other protective relays

o Circuit breaker control switch withindicating lights

o Local / remote or toggle switches

o Additional heaters for -40oC application

o 1/2 voltage heaters

o Adjustable thermostat

o Seismic capability (IEEE 693 high level)

o Interior convenience outlet (GFCI)

o Interior light with switch

o Molded case circuit breakers in lieu of fused knife switches

o Wire markers

© 2007, Siemens Power Transmission & Distribution, Inc.All rights reserved.E50001-U229-A269-US00Subject to change without notice.

Siemens Power Transmission & Distribution, Inc.

7000 Siemens Road

Wendell, North Carolina 27591 USA

1-800-347-6659

All statements, technical information andrecommendations contained herein arebased on information and tests we believe tobe reliable. The accuracy or completenesshereof is not guaranteed. Since conditions ofuse are outside our control, the user shoulddetermine the suitability of the product forits intended use and assumes all risk andliability whatsoever in connection herewith.

www.usa.siemens.com/energy