Introduction to the Bently Nevada 3500/25 126648-01 Power Monitor
The Bently Nevada 3500/25 (Part Number: 126648-01) is a critical monitoring module designed for continuous, reliable protection and monitoring of electrical power systems in industrial machinery. It is a part of the renowned Bently Nevada 3500 Machinery Monitoring System, a modular, rack-based system used globally to safeguard high-value assets in industries like power generation, oil & gas, and petrochemicals.
This module is specifically engineered to monitor single-phase or three-phase electrical power parameters. It accepts inputs from current transformers (CTs) and potential transformers (PTs) to measure key values such as voltage, current, power, power factor, and frequency. The module processes these inputs and provides both analog and discrete outputs to the system's main processor for alarm generation, machine protection, and operational data display.
Key Parameters
The following table outlines the key physical and general specifications for the 3500/25 126648-01 module.
| Parameter | Specification |
|---|---|
| Part Number | 126648-01 |
| Module Type | Power Monitor |
| System Compatibility | Bently Nevada 3500 Rack |
| Module Slot Width | Single Slot |
| Dimensions (H x W x D) | Approx. 193 mm x 21 mm x 260 mm (7.6 in x 0.83 in x 10.24 in) |
| Weight | Approx. 0.45 kg (1.0 lb) |
| Input Power | Powered by the 3500 Rack Backplane (+15 VDC, -15 VDC, +5 VDC) |
| Input Signals | Voltage (PTs) and Current (CTs) transformer signals. Configurable for various ratios and connection types (e.g., 3-phase, 3-wire). |
| Measured Parameters | Volts (V), Amps (A), Megawatts (MW), MegaVARs (MVAR), Power Factor, Frequency (Hz) |
| Outputs | • Analog Outputs: 4-20 mA representations of measured parameters. • Discrete Alarm Outputs: To the rack for Danger and Alert setpoints. |
| Operating Temperature | -20°C to +65°C (-4°F to +149°F) |
| Communications | Integral to the 3500 framework via the rack's communication modules. |
Application Scenarios
The 3500/25 Power Monitor is deployed in scenarios where real-time monitoring and protection of electrical power are critical for operational safety and equipment reliability. Typical application scenarios include:
Gas & Steam Turbine-Generator Sets:
Monitors the electrical power output (MW, MVAR) of the generator.
Protects the turbine from overload conditions by tripping the unit if power levels exceed safe limits.
Monitors power factor to ensure efficient operation and grid stability.
Electric Motor Monitoring:
Used to monitor large critical motors, such as those driving compressors or pumps.
Protects the motor from underload (e.g., pump cavitation) or overload conditions that can cause damage.
Provides data for energy management and performance analysis.
Power Generation Plants:
Monitors the main generator and auxiliary systems within a power plant.
Provides critical data for synchronization with the electrical grid.
Helps in load shedding and system stability management.
Industrial Process Plants:
In oil refineries and chemical plants, it safeguards large motor-driven and turbine-driven equipment that is essential to the continuous production process.
Monitoring power consumption helps in optimizing process efficiency and reducing operational costs.
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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