Type SDV7 Distribution Circuit Breaker Family
15.5 kV to 38.0 kV
Type SDV7 Distribution Circuit Breaker Family
Type SDV7 Distribution Circuit Breaker Ratings, Enclosures and Types
Ratings offered:
- 15.5 kV, 20 kA to 40 kA, 1,200 A to 3,000 A, 110 kV BIL
- 27.6 kV, 20 kA to 25 kA, 1,200 A to 2,000 A, 150 kV BIL
- 38.0 kV, 20 kA to 40 kA, 1,200 A to 2,500 A, 200 kV BIL.
Enclosure types offered:
- Standard: non-arc-resistant, type SDV7
- Optional: arc-resistant, accessibility type 2B to ANSI/IEEE C37.20.7, type SDV7-AR.
Type SDV7 distribution circuit breaker family includes:
- Type SDV7-SE: type SDV7 non-arc-resistant with stored-energy operator
- Type SDV7-MA: type SDV7 non-arc-resistant with magnetic-actuator operator
- Type SDV7-SE-AR: type SDV7-AR arc-resistant with stored-energy operator
- Type SDV7-MA-AR: type SDV7-AR arc-resistant with magnetic-actuator operator.
Stored-Energy Operator
Stored-energy operator features include:
- Time-proven type 3AH3 operator derived from operators introduced in 1977 (over 600,000 produced)
- Common operator for all ratings
- Short-circuit tested to ANSI/IEEE C37.09.
Magnetic-Actuator Operator
Magnetic-acutator operator features include:
- Design adapted from the type 3AH3 stored-energy operator configuration
- High-voltage compartment configuration identical to stored-energy version
- Short-circuit tested to ANSI/IEEE C37.09
- Built-in fast discharge circuit for electronic controller power capacitors
- Manual opening handle requires very modest force for operation
- Electronic controller life estimated at 30 years.
Features and Benefits
Features and benefits include:
- Extended capacitor switching (optional)
- Tested for out-of-phase switching ratings (ANSI/IEEE C37.09-1999)
- Large relay and control compartment
- Stainless steel exterior hardware
- Porcelain dry-type bushings with extended creep
- Highly reliable vacuum interrupters - MTTF over 57,000 years
- Pair with Siemens protective relays to match any typical application
- Moderate and high seismic qualification (Zones 1-4) available
- Meets or exceeds the latest ANSI, IEEE and NEMA standards
- ANSI/IEEE "rain tested" enclosure (C37.20.2-1999).
Technical Ratings
| Circuit breaker type SDV7 | Rated maximum voltage | Rated withstand voltages | Rated withstand voltages | Rated short-circuit and short-time current | Rated interrupting time1 |
| Lightning impulse (BIL) | Power frequency | ||||
| kV, rms | kV3 | kV | kA, rms | ms/cycles | |
| 15.5-20 | 15.5 | 110/142 | 50 | 20 | 50/3 |
| 15.5-25 | 15.5 | 110/142 | 50 | 25 | 50/3 |
| 15.5-31.54 | 15.5 | 110/142 | 50 | 31.5 | 50/3 |
| 15.5-404 | 15.5 | 110/142 | 50 | 40 | 50/3 |
| 27.6-20 | 27.6 | 150/194 | 60 | 20 | 50/3 |
| 27.6-25 | 27.6 | 150/194 | 60 | 25 | 50/3 |
| 38.0-204 | 38.0 | 200/258 | 80 | 20 | 50/3 |
| 38.0-254 | 38.0 | 200/258 | 80 | 25 | 50/3 |
| 38.0-31.54 | 38.0 | 200/258 | 80 | 31.5 | 50/3 |
| 38.0-404 | 38.0 | 200/258 | 80 | 40 | 50/3 |
| Circuit breaker type | Rated continuous current | Rated transient recovery voltage2 | Rated transient recovery voltage2 | Rated permissible tripping delay time | Rated closing and latching current |
| uc TRV peak value | t3 time to voltage uc | Y | |||
| A, rms | kV | µs | sec | kA peak | |
| 15.5-20 | 1,200, 2,000 | 29.2 | 32 | 2 | 52 |
| 15.5-25 | 1,200, 2,000 | 29.2 | 32 | 2 | 65 |
| 15.5-31.54 | 1,200, 2,000, 3,000 | 29.2 | 32 | 2 | 82 |
| 15.5-404 | 1,200, 2,000, 3,000 | 29.2 | 32 | 2 | 104 |
| 27.6-20 | 1,200, 2,000 | 52.1 | 45 | 2 | 52 |
| 27.6-25 | 1,200, 2,000 | 52.1 | 45 | 2 | 65 |
| 38.0-204 | 1,200, 2,000 | 71.7 | 59 | 2 | 52 |
| 38.0-254 | 1,200, 2,000 | 71.7 | 59 | 2 | 65 |
| 38.0-31.54 | 1,200, 2,000, 2,500 | 71.7 | 59 | 2 | 82 |
| 38.0-404 | 1,200, 2,000, 2,500 | 71.7 | 59 | 2 | 104 |
Footnotes:
1 83 ms/five-cycle optional for stored-energy operator.
2 TRV values are in accordance with ANSI/IEEEC37.06-2009 TRV peak value uc roughly equal to historic E2 value in ANSI/IEEE C37.06-2000. Value t3, time to voltage uc is approximately 1/1.1383, times T2 value in ANSI/IEEE C37.06-2000.
3 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.
4 Magnetic-actuator operator availability to be announced for these ratings. Consult factory.
Dimensions
| Rating | A | B | C | D | E | F |
| 15. 5 kV/ 1,200 A-2,000 A | 10.7 (272) | 13.0 (330) | 47.1 (1,197) | 44.5 (1,130) | 12.4 (315) | 19.8 (503) |
| 15.5 kV/ 3,000 A | 12.3 (312) | 16.0 (406) | 56.5 (1,340) | 52,8 (1,340) | 15.9 (403) | 21.0 (534) |
| 27.6 kV/ 1,200 A-2,000 A | 12.3 (312) | 16.0 (406) | 56.5 (1,435) | 49.8 (1,265) | 14.4 (366) | 21.2 (538) |
| 38.0 kV/ 1,200 A, 2,000 A, 2,500 A | 13.4 (340) | 19.5 (495) | 67.8 (1,723) | 63.0 (1,600) | 20.4 (518) | 22.2 (563) |
| Rating | G Minimum-Maximum | H | I | J | K1 |
| 15. 5 kV/ 1,200 A-2,000 A | 92.0-116.0 (2,337)-(2,945) | 36.1 (918) | 31.3 (794) | 42.7 (1,084) | 10.3 (260) |
| 15.5 kV/ 3,000 A | 96.0-120.0 (2,438)-(3,048) | 44.2 (1,123) | 39.4 (1,001) | 52.0 (1,321) | 11.4 (290) |
| 27.6 kV/ 1,200 A-2,000 A | 96.0-120.0 (2,438)-(3,048) | 44.2 (1,123) | 39.4 (1,001) | 52.0 (1,321) | 11.4 (290) |
| 38.0 kV/ 1,200 A, 2,000 A, 2,500 A | 120.5-144.5 (3,060)-(3,670) | 55.6 (1,413) | 50.9 (1,294) | 63.1 (1,604) | 16.7 (424) |
Footnotes:
1 Arc-resistant only.
Request for Quotation
Request for Quotation
To request a quotation of a type SDV7 or type SDV7-AR distribution circuit breaker, please use our online request for quotation tool at www.usa.siemens.com/energy/sdvrfq or contact your local Siemens representative.
