Description
Product Introduction
The Bently Nevada 3500/15 is the power supply module designed for the Bently Nevada 3500 Machinery Protection System. Installed in the leftmost slots (Slots 0A and 0B) of the 3500 rack, it accepts plant utility power and conditions it down to regulated DC operating voltages required by the Rack Interface Module (3500/22M), machinery monitors, keyphasors, and relay cards.
The 3500/15 supports dual-redundant configurations. When two 3500/15 modules are installed in a single rack, the upper slot serves as the primary supply while the lower slot acts as an auto-switching backup. If primary input power drops or an internal component fails, the redundant supply assumes the full electrical load without interrupting machinery monitoring or triggering false trip signals.
Key Technical Specifications & Ordering Options
| Parameter | Value |
| Part Number | 3500/15 (Base Module Number) |
| Manufacturer | Bently Nevada (Baker Hughes) |
| High Voltage AC/DC Input (Option -01) | 85 to 264 VAC RMS (47 to 63 Hz) / 88 to 300 VDC |
| Low Voltage DC Input (Option -02) | 18 to 36 VDC |
| High Voltage DC Input (Option -03) | 85 to 200 VDC |
| Power Consumption | 300 Watts Max (Full Rack Load) |
| Physical Dimensions | Full-height, half-slot module (228 mm x 25 mm x 210 mm) |
| Location in Rack | Leftmost slots (Slot 0A / Slot 0B) |
| Redundancy Support | Automatic load sharing and seamless failover when dual supplies are installed |
| Operating Temp | -30°C to +65°C (-22°F to +149°F) |
Application Scenarios & The “Trench” Experience
Picture a critical 50 MW steam turbine in a power generation facility equipped with a 3500 rack for shaft vibration and thrust position protection. An unexpected utility breaker trip cuts power to the primary rack power feed. Because a secondary 3500/15 module is wired to a separate 125V DC station battery bank in a redundant dual-supply configuration, the rack experiences zero voltage drop. The turbine protection interlocks remain online without dropping machinery trip relays or generating false vibration alarms.
- Power Generation Turbines – Provides uninterrupted power to proximity probe channels on gas and steam turbine generator sets.
- Refinery Hydrocrackers & Compressors – Drives continuous vibration monitoring on high-pressure multi-stage centrifugal gas compressors.
- Offshore Oil Platforms – Accepts wide-range 24V DC platform battery power (Low-Voltage DC option) for remote production skids.
3500/15
3500/15
Transparency SOP: Quality Assurance & Testing
Every Bently Nevada 3500/15 module undergoes functional validation on a 3500 test rack:
- Physical & Terminal Inspection: Inspect rear backplane multi-pin connectors, front panel thumbscrews, and power input terminal blocks for physical integrity.
- Burn-in & Voltage Regulation: Apply full nominal input voltage (120/230V AC or 24/125V DC depending on module version) and measure internal rail voltages under load.
- Failover & Redundancy Test: Mount alongside a primary supply in a loaded 3500 rack; simulate abrupt input power loss to verify microsecond failover behavior without rack resets.
- Thermal Stability Audit: Run module under continuous high-wattage load to verify thermal dissipation and output stability.
- Packaging: Wrap in anti-static shielding film and secure in custom foam-lined shipping boxes.
The Veteran’s Tech Trap Guide
- ⚠️ Do Not Mix Input Voltage Types in Redundant Slots: While the 3500 system permits mixing supply types in theory under specific PIM choices, mixing high-voltage AC and low-voltage DC modules without verifying the corresponding Power Supply Input Module (PIM) on the rear chassis can cause terminal wiring errors and blown input fuses.
- ❗ Verify the Rear PIM Matches the Front Module: The 3500/15 consists of two parts: the front-mount power supply module and the rear-mount Power Input Module (PIM). Always match the input voltage rating of the front 3500/15 card with the correct rear PIM card.
- ⚠️ Check “Supply OK” LED Status Before Troubleshooting Monitors: If individual monitor cards in the rack display system faults, check the supply status LEDs on the 3500/15 first. A sagging DC voltage rail on an aging power supply can cause downstream cards to report intermittent memory or sensor line faults.
Frequently Asked Questions
Q: Can a 3500 rack operate with only one 3500/15 power supply?
A: Yes. A single 3500/15 module in Slot 0A can power a fully populated 3500 rack. Installing a second module in Slot 0B adds supply redundancy for critical applications.
Q: Is the Bently Nevada 3500/15 power supply hot-swappable?
A: Yes, provided the rack has dual redundant power supplies installed and one supply remains operational. You can remove and replace the failed 3500/15 module without powering down the rack or interrupting machinery protection.
Q: What is the difference between part number 106M1079-01 and 106M1081-01?
A: These represent specific sub-assembly part numbers within the 3500/15 series (such as the High Voltage AC/DC vs. Low Voltage DC front supply card configurations).
Q: What warranty is provided with this module?
A: All Bently Nevada 3500/15 power supplies—whether New Surplus or bench-tested Refurbished—come backed by a full 12-month operational warranty.
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