3AP3-800
Live-tank circuit breaker 3AP3, 362–550 kV with closing resistors, two interrupter units per pole, spring drive — platform extends to 800 kV as 3AP4/5 (four interrupter units), up to 63 kA / 5,000 A
3AP3-800
- Closing-resistor variant of the 3AP live-tank platform: two self-compression interrupter units per pole plus pre-insertion resistors, offered for 362 kV to 550 kV applications (manufacturer catalog, 2022)
- Above 550 kV the same modular platform continues as 3AP4 (four interrupter units per pole) and 3AP5 (with closing resistors on request), covering 800 kV — catalog reference design: 3AP4 FI 800 kV pole
- Documented US-market ratings: 63 kA rated breaking and up to 5,000 A at 362 / 550 / 800 kV; lightning impulse withstand 1,175 / 1,800 / 2,100 kV respectively
- Stored-energy spring operating mechanism and identical modular components across the whole 3AP family up to 1100 kV; FG, FE or FI base arrangements
- Ordered family: SAP shows 33 order lines since 2018 under 3AP3 materials, both 420 kV FI configurations, including a KMAT (configurable) breaker
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3AP3-800 covers 362–550 kV of the circuit breakers range (≤ 800 kV across the category, √ scale).
Specifications
Main
| Type designation | 3AP3 = 3AP2 two-interrupter live-tank platform equipped with closing resistors (362–550 kV); higher-voltage siblings 3AP4 / 3AP5 (800 kV) |
| Design | Live-tank circuit breaker, 2 interrupter units per pole (3AP4/5: 4 units per pole) |
| Closing resistors | Pre-insertion resistors (PIR), modular platform component; optional for 362–550 kV (= 3AP3), on request for the 3AP4 (= 3AP5) |
| Pole arrangement | FG (three-pole operation, common base), FE (single-pole operation, common base) or FI (one pole per separate base) |
| Operating mechanism | Stored-energy spring mechanism, identical drive concept across the 3AP family up to 1100 kV |
| Arc-quenching medium | SF6, self-compression interrupter units |
| Installation | Outdoor |
Electrical — 3AP2/3, 362–550 kV (US live-tank brochure, 2021)
| Rated voltage | 362 kV / 550 kV |
| Power-frequency withstand voltage | 520 kV (362 kV class) / 860 kV (550 kV class) |
| Lightning impulse withstand voltage | 1,175 kV (362 kV class) / 1,800 kV (550 kV class) |
| Rated current | up to 5,000 A |
| Rated breaking current | 63 kA |
| Interruption speed | Two- or three-cycle circuit interruption (brochure, FA-spring operating mechanism) |
Electrical — 800 kV range extension, 3AP4/5 (US live-tank brochure, 2021)
| Rated voltage | 800 kV |
| Power-frequency withstand voltage | 1,150 kV |
| Lightning impulse withstand voltage | 2,100 kV |
| Rated current | up to 5,000 A |
| Rated breaking current | 63 kA |
| Interrupter units | 4 per pole (3AP4); with closing resistors on request = 3AP5 |
Standards & lifecycle
| Product standard | Type-tested in accordance with latest IEC and ANSI standards (manufacturer catalog); US-market variants offered per IEEE/ANSI practice (US brochure) |
| Type testing | Type-tested in accordance with IEC and ANSI standards; lead-factory lab accredited according to IEC 17025, PEHLA network, STL member (manufacturer catalog) |
| Maintenance cycle | 12-year / 25-year maintenance cycle (US brochure, FA-spring operating mechanism) |
Electrical — 3AP2/3 platform, 2022 catalog (current online edition)
| Rated voltage | 420 kV / 550 kV (live-tank platform table columns 3AP2/3) |
| No. of interrupter units per pole | 2 |
| Rated short-duration power-frequency withstand voltage | 610 kV (420 kV) / 800 kV (550 kV) |
| Rated lightning impulse withstand voltage | 1,425 kV (420 kV) / 1,550 kV (550 kV) |
| Rated switching impulse withstand voltage | 1,050 kV (420 kV) / 1,175 kV (550 kV) |
| Rated normal current | up to 5,000 A |
| Rated short-time withstand current (1 s – 3 s) | up to 80 kA (420 kV) / up to 63 kA (550 kV) |
| Rated break time | 2 cycles |
| Rated operating sequence | O-0.3 s-CO-3 min-CO or CO-15 s-CO |
| Rated frequency | 50 or 60 Hz |
| Temperature range | −60 up to +55 °C (catalog footnote: limited normal-current rating at more than +40 °C) |
| Maintenance after | 25 years |
| 362 kV in the 2022 catalog | The catalog's live-tank platform table carries no 362 kV column (it steps 300 → 420 kV); its dead-tank table lists 3AP2/3 362 (2 interrupter units) at 520 kV power-frequency withstand, 1,380 kV lightning impulse withstand, 950 kV switching impulse withstand, up to 4,000 A and up to 80 kA. The US live-tank brochure's 362 kV figures (PF 520 kV / LIWV 1,175 kV / 5,000 A / 63 kA) are retained in the group above as a documented inter-publication discrepancy. |
Options & variants
From the SAP family-demand extraction (E3501; first order 2018-12-21, last 2026-06-30). Both 3AP3 materials are 420 kV FI configurations; the KMAT text confirms 3AP3FI-2 is a configurable breaker. The '3AP3FI-2-420KV' material text reads 'CABLE PARA PSD CAL. 22' verbatim in SAP — a PSD (point-on-wave switching device) control-cable text left on the material record, not a decoded product description. The Rev03 hierarchy also lists 3AP3FI-550kV and 3AP3DT-550kV (no order lines in the extraction); the 800 kV live-tank families are 3AP4FI-800kV (1 order line, 2025) and 3AP5FI-800kV (0 lines).
| SAP material | SAP description | Order lines (E3501) |
|---|---|---|
| 3AP3FI-2-420KV | CABLE PARA PSD CAL. 22 | 24 |
| 3AP3FI-2 | KMAT CB 3AP3FI-2_420kV | 9 |
Documents & downloads
Catalog High-Voltage Circuit Breakers — from 72.5 kV up to 1100 kV (Siemens Energy, 2022) (current online edition)
Catalog CPV2/CPV2S Circuit Switchers and 3AP Live-Tank Breakers 72.5–800 kV (Siemens Energy US, 2021)
Manual Standard Operational Manual 3AP2 420 kV (3AP live-tank platform)
Brochure Maintenance of AIS 3A circuit breakers — Grid Technologies Service (2023)
Ordered designations
Representative orderable type designations of this family — searchable via the catalog search.
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