BENTLY 130768-01

Description

Product Description

The BENTLY 130768-01 is a specialized monitoring module for the Bently Nevada 3500 system, specifically a 3500/22M Transducer Power Supply module. This module is a critical infrastructure component that provides isolated, regulated excitation power to externally mounted signal conditioners, most notably the 3300 XL 8mm Proximitor® systems. The primary function of the 130768-01 is to deliver a clean and stable -24V DC power source to drive the eddy current probes used for measuring shaft vibration, position (radial and axial), and speed (Keyphasor®) on rotating machinery. By centralizing and regulating the probe power within the 3500 rack, the Bently Nevada 130768-01 ensures measurement consistency, improves signal integrity by reducing noise, and simplifies system wiring compared to distributing individual power supplies. The reliable operation of an entire suite of proximity probes on a critical machine train often depends on the robust performance of this single module.

Product Parameters

• Module Type: Transducer Power Supply / Isolated Power Module

• Compatible System: Bently Nevada 3500 Rack System

• Primary Function: Provides isolated -24V DC excitation for external proximity probe systems (e.g., 3300 XL 8mm Proximitors).

• Output Voltage: -24V DC, regulated and isolated.

• Output Current Capacity: Sufficient to power multiple external proximitor units. Exact capacity is defined by the specific datasheet (e.g., capable of powering up to 12 or more Proximitors).

• Isolation: Provides high-grade galvanic isolation between the rack’s internal power and the field-side transducer power to prevent ground loops and protect the monitoring system.

• Output Channels: Typically a single, high-capacity output channel that is distributed externally.

• Status Indicators: LEDs for Power OK and Fault conditions.

• Mounting: Occupies one slot in a 3500 system rack.

• Connections: Output is provided via terminals on the module’s front or through the rack’s backplane to a dedicated termination panel.

• Operating Temperature: 0°C to +65°C.

Advantages and Features

• Centralized and Clean Power: The BENTLY 130768-01 replaces multiple small, distributed power supplies with a single, rack-mounted, high-quality source, ensuring consistent voltage to all probes and eliminating a common source of measurement error.

• Enhanced System Reliability and Noise Immunity: The built-in isolation and regulation prevent electrical noise from the plant power system or ground loops from interfering with the sensitive analog measurement circuits of the proximity probes.

• Simplified Maintenance and Diagnostics: Having a single, monitored power source within the 3500 rack makes troubleshooting easier. A fault LED on the 130768-01 quickly indicates a problem with the probe power circuit.

• Optimized for Bently Nevada Ecosystem: This module is designed to work seamlessly with Bently’s 3300 XL Proximitor series and the 3500 monitoring modules, guaranteeing compatibility and performance as specified in API 670 standards.

• Space and Cost Efficiency: Reduces the need for additional enclosures, wiring, and power supplies in the field, leading to a cleaner panel design and potentially lower overall installation cost.

Application Cases in Various Fields

• Steam & Gas Turbine Monitoring: A single Bently Nevada 130768-01 module in a turbine protection rack supplies power to all X and Y proximity probes for radial vibration, thrust position probes, and Keyphasor probes on a turbine-generator shaft line.

• Centrifugal and Axial Compressors: Provides the excitation power for probes monitoring rotor dynamics, shaft position, and surge conditions in critical compressors in LNG plants or refineries.

• Hydroelectric Turbines: Powers the proximity probes used to monitor guide bearing wear and shaft runout on large vertical hydroturbine units.

• High-Speed Motors and Pumps: Used on critical motor-driven compressors or boiler feed pumps to power the vibration and position probes essential for reliable protection.

Comparisons with Competing Products

1. Integrated System Power vs. Discrete Power Supplies: The main alternative to the 130768-01 is using individual, standalone -24V DC power supplies for each probe or group of probes. The Bently Nevada solution offers superior integration, centralized monitoring, guaranteed compatibility, and typically better noise performance.

2. Vendor-Specific Solutions: Other machinery monitoring vendors (e.g., Emerson/CSI) have their own transducer powering schemes, often integrated into their monitor cards or as separate modules. The 130768-01 is the dedicated and optimized solution for powering Bently Nevada’s own proximitor ecosystem within a 3500 rack.

3. Internal vs. External Power: Some monitoring systems provide probe power directly from the monitor module itself. The 3500 architecture with the 130768-01 separates this function, which can be advantageous for systems with many probes, as it distributes the thermal and electrical load and allows for more flexible system layouts.

Selection Suggestions and Precautions

1. Calculate Total Power Demand: Before selecting the BENTLY 130768-01, calculate the total current draw of all the external 3300 XL Proximitors (or equivalent) it will power. Ensure the module’s rated output capacity is not exceeded.

2. Verify System Compatibility: Confirm that the external conditioners (e.g., 3300 XL 8mm Proximitor) are designed to be powered from a 3500/22M module. Using incompatible transducers can lead to improper operation.

3. Proper Distribution Wiring: Use correct wire gauge for the distributed power lines to avoid excessive voltage drop at the farthest probe. Follow Bently Nevada’s installation guidelines for shielding and grounding of the power distribution wiring.

4. Fuse Protection: The external power distribution lines should be properly fused near their source (the 130768-01 output) to protect the module from short circuits in the field wiring.

5. Redundancy Consideration: For the most critical machinery, consider the power supply as a single point of failure. While the 130768-01 itself is highly reliable, some high-availability designs might employ a redundant power scheme or have a spare module available for rapid replacement. Always monitor its “Fault” LED as part of routine checks.

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