Component Description
The part number 3500/61-03-00 133835-02 refers to a specific configuration of the 3500/61 Hydraulic Monitor module from the Bently Nevada 3500 System. This system is a globally recognized machinery protection platform.
3500/61: This designates a Hydraulic Monitor Module. This module is designed to monitor critical parameters of a machine's hydraulic system, such as fluid pressure and temperature. It protects machinery from damage that can occur due to hydraulic system failures.
-03-00: This suffix indicates the specific hardware configuration of the module, including the types of sensors it is designed to interface with (e.g., pressure transmitters, RTDs) and the default alarm setpoint configuration.
133835-02: This is a specific hardware revision or assembly number for this configured module.
In summary, this module is a dedicated monitor for hydraulic system conditions, providing continuous surveillance, alarm generation, and shutdown signals to protect expensive assets like turbines and compressors from damage related to lube oil, seal oil, or control fluid system failures.
Key Parameters
The following table outlines the key parameters for the 3500/61-03-00 Hydraulic Monitor module.
| Parameter | Specification |
|---|---|
| System | Bently Nevada 3500 |
| Primary Function | Hydraulic Parameter Monitoring (e.g., Pressure, Temperature) |
| Channels | Dual-channel for monitoring two independent parameters. |
| Input Types | Accepts signals from transmitters (e.g., 4-20 mA for pressure) and/or temperature sensors (e.g., RTDs). The -03-00 suffix defines the exact input types. |
| Monitoring Capabilities | Absolute Pressure, Differential Pressure, Temperature. |
| Alarm Functions | Per channel: Alert (Warning) and Danger (Shutdown) setpoints with programmable delays. |
| Outputs | OK, Alert, and Danger relay signals per channel (typically routed through a separate 3500/ Relay Module). |
| Mounting | Slides into a dedicated slot in a 3500 rack. |
| Dimensions (H x W x D) | Approx. 193 mm x 55 mm x 200 mm (7.6 in x 2.16 in x 7.87 in) |
| Weight | Approx. 0.6 kg (1.3 lbs) |
Application Scenarios
The 3500/61 Hydraulic Monitor is critical in applications where the failure of a hydraulic or fluid system would lead to catastrophic machinery damage.
Turbine Lube Oil Pressure Monitoring:
Application: Gas and Steam Turbines.
Function: Monitors the main lube oil pressure. A low-pressure condition can cause bearing damage. The module will trigger an alarm (Alert) for a warning and a shutdown (Danger) if pressure falls to a critically low level, preventing metal-to-metal contact.
Compressor Seal Oil Differential Pressure Monitoring:
Application: Centrifugal Compressors in refinery and petrochemical plants.
Function: Monitors the differential pressure between the seal oil and the process gas. Maintaining a higher oil pressure is essential to prevent flammable or toxic process gas from leaking out. The 3500/61 ensures safe operation by alarming and tripping the compressor if the differential pressure is too low.
Control Fluid Pressure Monitoring:
Application: Electro-hydraulic control (EHC) systems on turbines.
Function: Monitors the pressure of the fluid used to actuate control valves. Loss of control fluid pressure can lead to an inability to control the machine's speed or load, posing a significant safety and operational risk.
Heat Exchanger and Cooler Monitoring:
Application: Various critical machines.
Function: Can monitor the differential pressure across a lube oil cooler to detect clogging, or monitor fluid temperature to ensure proper cooling is being achieved.
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