Bently Nevada 3500/53 286566-01 Electronic Overspeed Detection Module

Product Description

The 286566-01 is a critical safety component of the Bently Nevada 3500 Series Machinery Protection System, designed as an Electronic Overspeed Detection Module. It provides highly reliable, redundant protection for rotating machinery, including steam turbines, gas turbines, and large motors. The module continuously monitors shaft speed and compares it against user-defined alarm setpoints to prevent catastrophic mechanical failure.

Engineered to meet the stringent requirements of API 670 and API 612, the 286566-01 is typically deployed in voting configurations (2-out-of-2 or 2-out-of-3) to ensure that a single sensor or module failure does not cause a nuisance trip—or, more importantly, fail to trip during a genuine overspeed event. Its rugged design and wide operating temperature range make it suitable for demanding industrial environments.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Part Number: 286566-01

• System Series: 3500 Series Monitoring System

• Function: Electronic Overspeed Detection

• Input Voltage: -24 V DC

• Operating Temperature: -40°C to +85°C (-40°F to +185°F)

• Humidity: 95% non-condensing

• Dimensions: 2.5 cm x 25.7 cm x 24 cm

• Weight: 0.92 kg

• Compliance: Meets API 670 and API 612 standards

• Voting Logic: Supports 2-out-of-2 and 2-out-of-3 configurations

• Response Time: Ultra-fast detection for emergency trip scenarios

Application Scenarios

The 286566-01 provides an essential safety layer for high-speed rotating equipment in:

• Power plants

• Oil refineries

• Chemical processing facilities

It is used whenever mechanical overspeed bolts are replaced by electronic sensing, or as a primary electronic safety system to trigger an Emergency Shutdown (ESD) of a turbine train.

Technical FAQ

Q: How does the redundant voting system improve safety?
A: By using multiple 286566-01 modules in a 2-out-of-3 voting logic, the system ensures that at least two modules must agree that an overspeed condition exists before tripping the machine. This prevents a faulty sensor from causing an expensive false trip while ensuring the machine is protected even if one module fails.

Q: Can this module be used with different types of speed sensors?
A: Yes. It is designed to interface with standard magnetic pickups or proximity probes that provide the high-frequency pulse train required for accurate speed calculation.