Live-tank breaker parts and service
Service solutions for your T&D infrastructure
Siemens Live-Tank Circuit Breaker Support
The Siemens type LPO and 3A-family live-tank high-voltage (HV) circuit breakers have offered dependable service for the past 30 years. As the supplier of OEM parts for Siemens HV breakers, Siemens is committed to supporting customers with qualified parts and factory-trained field service support throughout the breakers' life cycle.
Field service:
Siemens provides technical field assistance, turnkey maintenance, testing, and project management services. Project engineers strictly follow OEM guidelines to minimize downtime and maximize breaker reliability and performance.
Customer benefits:
- Improved outage planning and support
- Comprehensive project management with access to OEM engineering departments
- Most advanced equipment available
- Extended breaker service life
- Reduced ongoing maintenance costs
Maintenance training:
When combined with a scheduled maintenance outage, breaker technical field assistance and on-site training provides hands-on experience for maintenance crews in:
- Maintenance and repair sequencing
- Factory adjustment procedures and tolerances
- Part identification
- Troubleshooting
- Failure analysis
Major maintenance program – 20 year
Performing major maintenance on Siemens HV circuit breakers enables reliable service for an additional 20 years or more.
| Operation | Major inspection (10 years) | Major maintenance (20 years) |
|---|---|---|
| Circuit breaker | ||
| Visually inspect breaker externally | X | X |
| Measure SF6 gas pressure | X | |
| Remove SF6 gas | X | |
| Check contact system, blast cylinder | X | |
| Visually inspect bell crank mechanism parts and locking devices | X | |
| Replace seals | X | |
| Refill breaker with SF6 gas | X | |
| Check response time and synchronization | X | |
| Hydraulic control | ||
| Visually inspect hydraulic system | X | X |
| Replace hose between monitoring unit and the oil pump | X | |
| Drain oil, inspect tank, replace with new oil and filter | X | |
| Vent oil-pump, hydraulic system | X | |
| Measure nitrogen pre-charge pressure | X | |
| Measure operating values of safety valve | X | |
| Inspect hydraulic system for internal leaks, measure oil pressure | X | X |
| General | ||
| Measure operating values of SF6 density monitor, oil pressure switches | X | X |
| Check breaker pressure gauge for SF6 and pressurized oil | X | X |
| Inspect anti-condensation heaters | X | X |
| Functional checks | X | X |
| Measure SF6 gas humidity content, SF6 gas-air content | X |
Diagram Description: The diagram shows the rating of short-circuit breaking current in kA versus voltage rating in kV for different Siemens circuit breaker models: 3AT2/3, 3AT4/5, 3AP1 FG, 3AP1 FI, and 3AP2 FI. The x-axis ranges from 0 to 800 kV, and the y-axis ranges from 0 to 80 kA. The models are plotted within this range, indicating their respective capabilities.
Contact Information
Siemens Industry, Inc.
7000 Siemens Road
Wendell, NC 27591
For more information, please contact our Customer Support Center.
Phone: 1-800-333-7421
usa.siemens.com
Order No: IC1000-E240-A111-X-4AUS
Printed in USA
©2017 Siemens Industry, Inc.
Disclaimer: The technical data presented in this document is based on an actual case or on as-designed parameters, and therefore should not be relied upon for any specific application and does not constitute a performance guarantee for any projects. Actual results are dependent on variable conditions. Accordingly, Siemens does not make representations, warranties, or assurances as to the accuracy, currency, or completeness of the content contained herein. If requested, Siemens will provide specific technical data or specifications with respect to any customer's particular applications. Siemens is constantly involved in engineering and development. For that reason, Siemens reserves the right to modify, at any time, the technology and product specifications contained herein.
