The Bently Nevada 84661-33 is a high-performance, armored interconnect cable designed to maintain signal integrity for critical machinery protection systems. Engineered for durability in harsh industrial environments, this cable is specifically optimized for connecting Velomitor piezoelectric velocity sensors to monitoring systems, such as the Bently Nevada 3500 series rack.
Features
Stainless Steel Armor: Provides a robust physical shield against mechanical impact, abrasion, and foot traffic.
Twisted Shielded Pair: Minimizes electromagnetic interference (EMI) to ensure clean, low-noise vibration data transmission.
Hermetically Sealed Connectors: Protects against moisture and environmental contaminants.
FEP Insulation: Offers superior resistance to extreme temperatures and chemical exposure, including industrial lubricants and oils.
Flexible Routing: Designed for ease of installation in complex machinery layouts.
Applications
Power Generation: Monitoring casing and strut vibration on gas and steam turbines.
Process Industry: Vibration data acquisition for centrifugal and reciprocating compressors.
Pumping Systems: Absolute bearing vibration monitoring for boiler feed and hot oil pumps.
Industrial Fans: Suitable for ID/FD and cooling tower fans operating in corrosive or outdoor environments.
Technical Specifications
Model
84661-33
Length
33 ft (10.06 m)
Cable Type
Standard Armored Interconnect
Transducer Connector
3-socket female MIL-C-5015 style
Operating Temperature
-29 degC to +121 degC (-20 degF to +250 degF)
Storage Temperature
-55 degC to +150 degC
Wire Gauge
24 AWG
Impedance
50 Ohm +/- 10% (at 1 kHz)
Capacitance
<= 100 pF/m (signal-to-shield)
Max Voltage
60 V DC (IEPE excitation)
Installation Guidelines
Bend Radius: Maintain a minimum static bend radius of 51 mm (2.0 in). For handling and installation, use a larger radius (up to 15x cable diameter) to prevent internal copper fatigue.
Routing: Whenever possible, route the cable through dedicated conduits to provide additional protection against physical damage and to further reduce EMI from high-voltage power lines.
Handling: Ensure the system is powered down before connecting or disconnecting the sensor cable to prevent electrical transients.
FAQ
What is the length of the 84661-33 cable?
The cable has a nominal length of 33 feet (10.06 meters).
What sensors is this cable compatible with?
This cable is primarily designed for use with Bently Nevada Velomitor sensors, including the 330750 and 330752 High-Temperature Velomitor models.
What is the primary purpose of the armor?
The stainless steel overbraid acts as a physical barrier to protect the internal signal conductors from accidental impact, crushing, and environmental wear in industrial settings.
