Description
The Bently Nevada 3500/15-05-05-00 is a High Voltage AC Power Supply module for the 3500 Machinery Protection System. This module is a half-rack wide component that converts source power into the regulated DC voltages required by the various monitor modules, backplane, and transducers within the 3500 rack.
Ordering Code Breakdown (3500/15-05-05-00)
- 3500/15: Power Supply Module.
- 05: High Voltage AC (175 to 250 V AC rms).
- 05: High Voltage AC (175 to 250 V AC rms) — Secondary/Redundant input.
- 00: No Agency Approvals (Standard/Non-Hazardous).
Availability and Procurement
- Condition: New Original (Factory Sealed) or New Surplus.
- Warranty: 12-month standard industrial warranty.
- Lead Time: Usually in stock; ships within 2–4 business days.
- Pricing: Subject to current inventory and market demand; contact us for a formal quote.
Technical Specifications
The 3500/15 is designed to provide stable, low-noise power to ensure the accuracy of vibration and proximity measurements.
| Parameter | Specification |
| Input Voltage | 175 to 250 V AC rms (50/60 Hz) |
| Output Voltages | Regulated +/- 24 V DC and +5 V DC |
| Current Draw | 2.3 A rms (maximum) |
| Out-of-Range Protection | Automatic shutdown if input drops below ~150 V AC |
| Redundancy | Supported (Upper and Lower Power Supply slots) |
| Dimensions | 120.7 mm x 241.3 mm x 241.9 mm |
| Weight | ~1.39 kg (3.06 lb) |
Engineering Insights: Configuration and Reliability
As an automation architect who has commissioned Bently Nevada systems in power plants and refineries, I emphasize the following technical considerations for the 3500/15:
1. Power Supply Redundancy
The 3500 rack allows for two Power Supply modules. The -05-05 option code indicates that both the primary and secondary supplies are configured for High Voltage AC.
- Load Sharing: When two supplies are installed, they share the rack load. If one fails, the other takes over the full load instantly without interrupting rack operation or causing “Not OK” status on monitors.
- Mixed Power: You can mix AC and DC supplies in the same rack if necessary (e.g., -05-02), which is useful if you have both utility power and a battery backup bank.
2. Slot Placement
The Power Supply modules must be installed in the far left-hand side of the 3500 rack.
- Upper Slot: Primary Power Supply.
- Lower Slot: Redundant Power Supply.
3. High Voltage vs. Low Voltage
Ensure your site voltage matches the -05 designation (175–250 V AC). If your facility uses 110 V AC, you require the -04 (Low Voltage AC) option. Connecting 220 V AC to a -04 module will result in catastrophic failure of the supply’s input stage.
4. Grounding and Noise
The 3500 system is highly sensitive. The 3500/15 power supply requires a dedicated, clean instrument ground. Inadequate grounding at the power supply terminal block can lead to “ghost” vibration readings or high noise floors on your 3500/25 or 3500/42M monitors.
FAQ
Q: Can I hot-swap the 3500/15 power supply?
A: Yes, provided the rack has a redundant power supply installed and healthy. If the rack only has one supply, removing it will immediately shut down the entire machinery protection system, potentially triggering a turbine trip if your relays are configured for “De-energize to Trip.”
Q: What is the “Low Throughput” designation?
A: The 3500/15 is the standard power supply for most 3500 racks. If you have an exceptionally large rack configuration with multiple 3500/72M or 3500/77M modules that exceed the power rating of the 3500/15, you may need to consult Bently Nevada’s power calculator to ensure the 3500/15 can handle the total current draw.
Q: Do I need a specific backplane for this module?
A: The 3500/15 requires the corresponding Power Supply Input Module (installed in the rear of the rack). For the -05-05 version, you must ensure the rear module is rated for High Voltage AC.
| BENTLY 3500/20 125744-02 |
| Bently Nevada 3500/15 133292-01 |
| Bently Nevada 3500/15 127610-01 |
