Fortune Dcs

Introduction

The component with part number 3500/25-01-01-00 is a critical safety module within the Bently Nevada* 3500 Machinery Protection System. This part number refers to the 3500/25 Relay Module.

This module's primary function is to provide configurable relay outputs that are activated based on the status of other monitoring modules within the 3500 rack. It does not monitor machinery parameters directly but acts as the final "muscle" to execute safety actions, such as initiating a machinery shutdown, activating alarms, or controlling auxiliary equipment when a dangerous condition is detected.

*Bently Nevada is a part of Baker Hughes.

Parameters

The following table outlines the key technical parameters for the 3500/25-01-01-00 Relay Module.

Application Scenarios

The 3500/25 Relay Module is a versatile component used to execute physical actions based on the health of the machine. Its application scenarios are central to the protective function of the entire system.

1. Machinery Shutdown (Trip) Function:

• This is its most critical role. The module is programmed to de-energize a relay when a "Danger" signal is received from a monitoring module (e.g., from a 3500/42M Vibration Monitor). This relay's contact is wired directly to the turbine or compressor's emergency shutdown circuit, stopping the machine to prevent catastrophic failure.

2. Alarm Annunciation:

• Used to activate visual or audible alarms in the control room when an "Alert" condition is detected (e.g., high vibration or temperature). A separate relay can be dedicated to this function to warn operators of a developing problem.

3. Auxiliary Equipment Control:

• Can be programmed to start or stop auxiliary systems. For example, it can activate a lube oil pump if bearing temperature begins to rise, or open a bleed valve on a compressor if a surge condition is approached.

4. System Bypass Functions:

• Used in startup or maintenance sequences to temporarily bypass certain alarms or shutdown functions while the machine is in a known, non-operational state (e.g., on turning gear).

5. Providing Redundant Outputs:

• In high-reliability systems, multiple relay modules can be used to provide redundant shutdown paths, ensuring a single component failure does not prevent a safe shutdown.

System Context:

• The 3500/25 is the final link in the protective chain. It takes the decision made by monitoring modules and performs a physical action. It is used on all critical equipment protected by a 3500 system, including Gas & Steam Turbines, Compressors, Pumps, and Fans.