Bently Nevada 106765-04 Interconnect Cable Product Specification
106765-04 is factory pre-terminated shielded interconnection cable manufactured by Bently Nevada, Baker Hughes subsidiary from the United States, belonging to the full-range 106765 series dedicated matching wiring assembly for Velomitor XA piezoelectric velocity sensors used in rotating machinery online condition monitoring. The suffix "-04" defines fixed factory finished overall length of 4 meters, one end is pre-installed with hermetically sealed stainless steel connector complying with Mil‑C‑26482 military specification for direct plug-in connection to Velomitor XA transducer body, while the opposite end is pre-stripped bare conductors for convenient field wiring termination onto terminal blocks of 3300 series or 3500 series rack monitoring modules. Designed in strict accordance with API 670 turbomachinery protection industry standard, this short-size interconnect cable is responsible for bidirectional transmission of sensor excitation power supply and low-level vibration analog signals between field-mounted casing vibration pickup sensors and cabinet-installed monitoring equipment, widely deployed for bearing housing vibration measurement on steam turbines, induced draft fans, small and medium-sized centrifugal compressors, feed pumps in thermal power, petrochemical, metallurgical and offshore oil & gas industries. Every finished cable undergoes strict factory electrical calibration and environmental aging testing to fix accurate electrical length parameter, eliminating measurement deviation and false vibration alarm caused by impedance mismatch in monitoring loop.
Description
Bently Nevada 106765-04 Interconnect Cable Product Specification
1. Product Overview
106765-04 is factory pre-terminated shielded interconnection cable manufactured by Bently Nevada, Baker Hughes subsidiary from the United States, belonging to the full-range 106765 series dedicated matching wiring assembly for Velomitor XA piezoelectric velocity sensors used in rotating machinery online condition monitoring. The suffix "-04" defines fixed factory finished overall length of 4 meters, one end is pre-installed with hermetically sealed stainless steel connector complying with Mil‑C‑26482 military specification for direct plug-in connection to Velomitor XA transducer body, while the opposite end is pre-stripped bare conductors for convenient field wiring termination onto terminal blocks of 3300 series or 3500 series rack monitoring modules. Designed in strict accordance with API 670 turbomachinery protection industry standard, this short-size interconnect cable is responsible for bidirectional transmission of sensor excitation power supply and low-level vibration analog signals between field-mounted casing vibration pickup sensors and cabinet-installed monitoring equipment, widely deployed for bearing housing vibration measurement on steam turbines, induced draft fans, small and medium-sized centrifugal compressors, feed pumps in thermal power, petrochemical, metallurgical and offshore oil & gas industries. Every finished cable undergoes strict factory electrical calibration and environmental aging testing to fix accurate electrical length parameter, eliminating measurement deviation and false vibration alarm caused by impedance mismatch in monitoring loop.
2. Core Functional Characteristics
This cable completes dual-path transmission tasks: it transmits DC operating voltage output from proximitor monitor module to piezoelectric velocity sensor to sustain regular transducer working status, meanwhile feeds back tiny vibration induction signals collected by Velomitor XA pickup back to monitoring hardware for amplitude, frequency spectrum and equipment fault feature analysis. Precisely controlled distributed capacitance and impedance configuration ensures low-distortion, low-attenuation signal transmission within working frequency range from 4.5Hz to 2kHz, fully adapting short-distance on-site wiring layout within 4 meters for local sensor installation near equipment bearing pedestal. Multi-layer dense braided full shielding structure achieves over 85dB shielding efficiency against external electromagnetic interference generated by nearby frequency converters, high-current power cables and high-power industrial motors, effectively isolating industrial field clutter noise from millivolt-grade weak vibration signal and guaranteeing original waveform integrity during signal delivery. The hermetic sealed metal connector structure prevents infiltration of lubricating oil, condensed moisture, corrosive gas and floating dust inside turbine and compressor compartment into contact terminals, securing long-term stable circuit continuity under continuous mechanical vibration from running rotating equipment.
3. Internal Structure & Mechanical Construction
Inner core conductor adopts multi-strand tinned copper wire design, improving overall cable bending flexibility and restraining copper core oxidation corrosion to stabilize long-term conductive performance and reduce inherent DC resistance per unit length. Primary insulating layer is extruded high-performance PTFE Teflon fluoropolymer material with prominent high-temperature resistance, oil resistance and chemical inertness against various acidic, alkaline industrial fluids and turbine lubricating grease commonly found on production site. A full-surround dense tinned copper braided shielding layer is wrapped outside insulation layer to realize omnidirectional anti-interference protection, followed by high-temperature resistant, abrasion-proof special polymer outer jacket for mechanical protection against scratch, extrusion and chemical erosion. The sensor-side connector is fabricated with 316 stainless steel housing via full hermetic sealing treatment, equipped with keyed anti-misplug structural design to avoid reverse installation error during field wiring, and matched integrated rubber splash-proof boot to further upgrade joint environmental tightness. Minimum allowable dynamic bending radius equals ten times of cable outer diameter, suitable for narrow routing around equipment base, bearing support and internal cabinet compact wiring space without inner core fracture damage. Single finished 4-meter cable has net shipping weight around 1.0 kilogram under original factory anti-static sealed packaging.
4. Detailed Electrical Parameters
Rated working voltage of the cable is 300V AC or 75V DC, single core maximum allowable load current reaches 2A to match standard power supply parameter of Bently original monitoring system. Distributed capacitance is strictly controlled below 60pF per foot through factory production calibration to guarantee consistent electrical length matching with paired proximitor module, total electrical length tolerance is confined within ±0.2% of nominal value so as to avoid systematic measurement error of vibration monitoring data. DC conductor resistance is limited under 0.05Ω per meter to minimize power supply consumption between monitor and field sensor as well as signal amplitude loss during short-distance transmission. Whole-circuit inherent noise is suppressed below 0.004mm/s RMS within full effective working frequency bandwidth to restore real vibration waveform captured by field transducer accurately. Insulation resistance exceeds 100MΩ under 500V DC withstand voltage test before factory delivery to prevent intermittent short-circuit failure under damp working condition.
5. Environmental Operating Specifications
Continuous rated operating ambient temperature range covers -55°C to +121°C, capable of stable service in high-temperature area surrounding turbine cylinder and low-temperature coastal outdoor control cabinet environment simultaneously. Product safe storage temperature spans -50°C to +85°C under dry, ventilated warehouse condition without corrosive liquid splashing and surface moisture condensation. Applicable working relative humidity ranges from 5%RH up to 95%RH under non-condensing environment, fitting high-humidity cabinet layout of coastal petrochemical plant and offshore drilling platform control room. Complete cable assembly can withstand instantaneous peak mechanical shock up to 5000g during product transportation and equipment maintenance disassembly without internal wire breakage or shielding layer separation failure. Outer jacket and connector sealing components pass industrial lubricant immersion test to resist long-term erosion from turbine hydraulic oil and bearing grease on site.
6. Compatible Device & Application Range
106765-04 interconnect cable is originally designated matching wiring for Bently Nevada Velomitor XA series piezoelectric velocity transducers such as model 330525 pickup, and fully compatible with all 3300 series and 3500 series rack-mounted monitoring cards for casing vibration and bearing housing vibration monitoring from Bently Nevada product line. It serves as standard short-distance wiring component for fixed online condition monitoring system of steam turbine, induced draft fan, mill auxiliary equipment and medium-sized feed pump units in power generation, petrochemical refining and metallurgical processing industries. Vibration signals transmitted via this cable support real-time early abnormal vibration pre-warning and emergency interlock trip logic configuration of turbomachinery protection system, helping field maintenance staff discover early-stage bearing abrasion, rotor unbalance and gear engagement defects before sudden unit shutdown failure occurs. When installed in Class I hazardous explosive working zone, intrinsic safety barrier shall be added on intermediate wiring path complying with local site explosion-proof electrical specifications.
7. Factory Quality Control & Warranty Terms
Each individual 106765-04 finished cable is subject to multiple compulsory pre-delivery factory inspections including electrical length verification, high voltage insulation resistance test, shielding effectiveness detection, high-low temperature cyclic aging experiment and connector air tightness inspection to eliminate potential manufacturing defects before leaving factory. Original factory limited warranty period lasts twelve consecutive months counting from the date of formal product delivery to end customer; free replacement or maintenance service is available for confirmed inherent production defective products under rated operating environment and standardized installation within warranty period. Damage caused by unauthorized field cutting of cable body, incorrect wiring connection, overvoltage surge impact, artificial pulling damage, severe chemical corrosion and ultra-temperature over-range operation is excluded from official warranty coverage, all relevant maintenance expenses shall be borne by product user side.
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