Description
Key Technical Specifications
- Model Number: 3500/15
- Product Type: Half-Height Power Supply Module
- Installation Position: Mandatory leftmost slots in 3500/05 Rack
- Input Voltage Options: Universal AC (85-264 VAC), High/Low Voltage AC, High/Low Voltage DC
- Redundancy: Dual Power Supply Support (Upper = Primary, Lower = Backup)
- Hot-Swap Capability: Yes (Zero interruption to rack operation)
- Self-Diagnostics: Built-in output voltage monitoring via “SUPPLY OK” LED
- Protection: Internal fuse protection against overvoltage and internal faults
- System Compatibility: Bently Nevada 3500 Series Monitors and Relays
- Operating Temp: -30°C to +65°C (Standard Industrial)
Product Introduction
A tripped compressor because of a blown power supply fuse is a nightmare scenario. The Bently Nevada 3500/15 sits at the absolute bottom of the 3500/05 rack, acting as the sole heartbeat for your mechanical protection system. It takes raw, often dirty plant power and converts it into the precise internal voltages required by vibration monitors and relays. Honestly, if this module fails and you didn’t spec the redundant option, your entire safety system goes dark.
Why does the redundancy matter? When two 3500/15 modules are installed, the lower unit acts as the primary and the upper as the automatic backup. If the primary dies, the backup takes over instantly—no bump, no trip. Better yet, you can physically pull a failed 3500/15 and slide in a replacement while the rack is fully energized and protecting the machine. With a standard operating temperature range of -30°C to +65°C, it handles the brutal heat of turbine decks without derating. Bottom line: never cheap out on the second power supply.
Troubleshooting Quick Reference
- Fault: “SUPPLY OK” LED is OFF | Cause: Blown internal fuse or missing input power | Relevancy: High (80% chance) | Quick Check: Measure input terminals for correct AC/DC voltage | Fix: Check upstream breaker; replace fuse if accessible, otherwise swap module.
- Fault: Rack keeps tripping / Unstable operation | Cause: Single power supply failing under load | Relevancy: Medium | Quick Check: Verify if running single or dual power config | Fix: Hot-swap in a known-good 3500/15 to isolate the fault.
- Fault: Module won’t seat properly | Cause: Bent backplane pins or wrong slot | Relevancy: Low | Quick Check: Inspect rear connectors with a flashlight | Fix: Ensure it’s in the designated leftmost power slot, not a monitor slot.
BENTLY 3500-15
Application Scenarios & Pain Points
- Gas Turbine Compressor Stations: Remote locations with dirty generator power. The 3500/15’s universal AC input (85-264 VAC) handles massive voltage sags when heavy motors start without dropping the protection system.
- Offshore Platforms: Space and weight constraints. The half-height design allows dual redundant power supplies to fit in the same footprint as a single older unit, maximizing rack real estate.
- Refinery Steam Turbines: High ambient heat. Operating reliably up to +65°C means the power supply won’t thermal-shutdown during a summer heatwave when the turbine is running at full load.
