Bently Nevada 3500/15 Power Supply: Detailed Specifications and Operational Insights

Understanding Input Voltage Options

The Bently Nevada 3500/15 Power Supply offers diverse input voltage options, accommodating various industrial power sources. Engineers need to select the correct input module:

• Legacy High Voltage AC: Supports 220 Vac nominal, with a range of 175 to 264 Vac rms.
• Legacy Low Voltage AC: Handles 110 Vac nominal, with a range of 85 to 132 Vac rms.
• Universal Voltage AC: Provides the widest range, 85 to 264 Vac rms, ideal for global installations.

DC Input Characteristics and Protection

For DC applications, the 3500/15 supports:

• High Voltage DC: 88 to 140 Vdc.
• Low Voltage DC: 20 to 30 Vdc.

The system integrates out-of-range protection:

• Under-voltage: Conditions do not harm the power supply.
• Over-voltage: Triggers the Power Input Module's (PIM) fuse, protecting the system.

Analyzing Full Rack Current Draw

The full rack current draw varies based on input voltage type:

• High Voltage AC: Up to 2.3 A rms.
• Low Voltage AC: Up to 4.5 A rms.
• Universal Voltage AC: Up to 2.8 A rms.
• High Voltage DC: Up to 2.5 A.
• Low Voltage DC: Up to 10.0 A, the highest draw.

Careful consideration ensures proper power distribution and circuit sizing.

Output Indicators and Operational Status

The front panel features a "Supply OK" LED indicator, providing immediate visual feedback on operational status. This simplifies troubleshooting and minimizes downtime.

Legacy vs. Universal Compatibility Considerations

Compatibility varies between legacy and universal modules:

• Legacy High Voltage AC: Requires 175 to 250 Vac rms.
• Legacy Low Voltage AC: Operates on 85 to 125 Vac rms.
• Universal AC Power Supply: Not compatible with legacy units.

Critical factors must be considered during upgrades or replacements.

Practical Implications for System Design

During 3500 system design, engineers must:

• Select appropriate power supply and PIM: Based on available power source and current draw requirements.
• Plan carefully: Ensures system stability and reliability.

Redundant power supplies are recommended for critical applications to maximize system uptime and prevent costly errors.

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