Bently Nevada 3500/25‑01‑01‑00 Dual‑Channel Keyphasor Module (Internal Termination) for 3500 TSI Machinery Protection Rack

Description

Bently Nevada 3500/25‑01‑01‑00 Dual‑Channel Keyphasor Module (Internal Termination) for 3500 TSI Machinery Protection Rack

Product Introduction

The 3500/25 is a half‑height enhanced Keyphasor module for the Bently Nevada 3500 machinery protection system. This 3500/25‑01‑01‑00 variant stands for:

• 01: 2‑channel Keyphasor main board
• 01: I/O sub‑board with internal termination wiring
• 00: No hazardous area agency certification

It receives pulse signals from proximity probes or magnetic pickups installed on rotating shafts, converts shaft notch/keyway pulses into accurate once‑per‑revolution digital timing reference, and broadcasts this phase & speed benchmark to all vibration monitor cards inside the rack. With Keyphasor reference, the system can calculate 1X vibration amplitude, phase angle, orbit plots, order tracking and shaft rotational speed for advanced machinery diagnostics via System 1 software. One 3500 rack supports up to two 3500/25 modules (max 4 Keyphasor channels). This module does not execute trip protection logic, it only supplies phase reference signals. It is a critical spare for steam turbine, centrifugal compressor TSI cabinet maintenance.

Specific Application Information

• Shaft phase reference supply: Provide per‑turn timing benchmark for all vibration monitors in the rack.
• Rotational speed measurement: Calculate machine RPM from keyway pulse input, support speed trending and overspeed auxiliary monitoring.
• Vibration phase analysis: Enable 1X phase measurement for unbalance, misalignment and rotor dynamic fault diagnosis.
• Orbit & transient waveform capture: Supply phase mark for shaft orbit, polar plot and full transient vibration recording in System1.
• Dual‑channel redundancy: Two independent channels can install two Keyphasor probes on one shaft for redundant speed reference.
• Gear‑tooth scaling: Configure multiple teeth per revolution to measure speed from gear wheels.
• Sensor fault detection: Diagnose probe open/short circuit and abnormal pulse signal, report fault status to rack.
• TSI system integration: Work together with 3500/40M, 3500/42M vibration monitors and 3500/22M TDI data gateway.

3500/25-01-01-00

Technical Parameters

Main Features

✅ Dual independent Keyphasor channels: Support redundant speed probe configuration for critical rotating equipment. ✅ Dual transducer compatibility: Accept both proximity probes and magnetic pickup tacho sensors. ✅ High‑precision phase reference: The core prerequisite for vibration phase, orbit and order analysis. ✅ Half‑height compact design: Save rack slot space, one full slot can hold two half‑height modules. ✅ Signal validation function: Detect broken sensor, missing pulse and abnormal input. ✅ Hot‑swap replaceable: Module replacement without shutting down the whole 3500 rack. ✅ Backplane signal distribution: Distribute Keyphasor timing signal to all monitor modules in the rack. ✅ Wide speed measurement range: Suitable for low‑speed large turbines and high‑speed compressors.

Application Scenarios

1. Power Plants: Steam turbine, generator, boiler feed pump TSI shaft speed & phase monitoring.
2. Oil & Gas Refineries: Centrifugal compressor, turboexpander vibration phase diagnosis.
3. LNG Terminals: Refrigerant compressor rotating machinery condition monitoring.
4. Chemical Plants: High‑speed agitator, process compressor shaft vibration analysis.
5. Offshore Platforms: Gas compressor skid 3500 machinery protection rack.
6. Pulp & Paper Mills: Turbine‑driven paper machine rotating equipment monitoring.
7. Pipeline Pump Stations: Large high‑speed pump shaft speed and vibration diagnostics.

Supporting Components

• 3500 rack chassis and backplane
• 3500/15 rack power supply
• 3500/22M TDI transient data interface module
• Vibration monitor cards: 3500/40M, 3500/42M
• Keyphasor proximity probe / magnetic pickup sensor and extension cable
• 3500 rack configuration software
• System1 predictive maintenance diagnostic platform
• Signal terminal blocks for Keyphasor probe wiring

3500/25-01-01-00

Related Series Models (Bently Nevada 3500 Family, 8 Models)

1. 3500/25‑01‑01‑00 — Internal Termination Dual‑Channel Keyphasor (Target Item)
2. 3500/25‑01‑02‑00 — Keyphasor module with external termination
3. 3500/22‑01‑01‑00 — TDI Transient Data Interface
4. 3500/40M — 4‑Channel Proximitor Monitor
5. 3500/42M — Seismic Vibration & Position Monitor
6. 3500/32 — 4‑Channel Relay Output Module
7. 3500/54M — Overspeed Detection Module
8. 3500/15 — Rack Power Supply Module