Bently Nevada 3300/53-03-02-00-60-05-00-00-00 Overspeed Protection System

Description

Differential Expansion measures the axial position of the rotor relative to the machine casing at a certain distance from the thrust bearing. Changes in axial position impact axial clearances and are typically caused by thermal expansion during startup and shutdown.

This measurement is usually performed using a proximity probe transducer mounted on the machine casing, observing an axial surface (e.g., collar) of the rotor. It is commonly part of a Turbine Supervisory Instrumentation system.

The 3300/45 Dual Differential Expansion Monitor provides two channels of continuous differential expansion monitoring. It tracks both the magnitude and direction of differential expansion and allows four alarm setpoints (two over and two under alarms) per channel. Channel B can be turned OFF if only one location measurement is required.

Specifications

Inputs

• Signal: Accepts two proximity probe transducer signals
• Input Impedance: 10 kΩ
• Signal Scale Factor: 20 mV/mil (0.787 V/mm) or 10 mV/mil (0.392 V/mm), jumper-selectable
• Power Consumption: Nominal 1.5 watts

Signal Conditioning

• Accuracy: ±0.33% of full-scale (typical), ±1% (maximum) at +25°C (+77°F)

Outputs

Recorder Output

User-programmable options:

• +4 to +20 mA
• 0 to -10 Vdc
• +1 to +5 Vdc

Outputs are proportional to the programmed monitor full-scale. Each channel has individual recorder outputs, and short circuits do not affect monitor operation.

Recorder Accuracy (@ +25°C / +77°F):

• +4 to +20 mA: ±0.7% of signal, 0.09 mA offset
• +1 to +5 Vdc: ±1.1% of signal, 10 mV offset
• 0 to -10 Vdc: ±1.1% of signal, 15 mV offset

Output Impedance:

• Voltage outputs: 100 Ω (minimum load resistance: 10 kΩ)
• Current outputs: 0 to +12 Vdc range across 0-600 Ω load

Buffered Transducer Outputs

• One coaxial connector per transducer (front panel)
• One terminal connection per channel (rear panel)
• Short circuit protected

Transducer Supply Voltage

• -24 Vdc, current-limited per channel

Alarms

• Alarm Setpoints: Adjustable from 0 to 100% of full-scale
• LCD Resolution: ±1.6% of full-scale
• Alarm Repeatability: ±0.4% of full-scale

Relay Modules

• Location: One relay module can be installed behind each monitor
• Requirement: At least one alarm relay module per 3300 System

Display & Indicators

LCD Display

• Type: Non-multiplexing vertical bargraph Liquid Crystal Display (LCD)
• Segments: 63 LCD segments per channel
• Additional Features: Displays probe gap, error codes, and ADJUST mode
• Size: 83 mm (3.25 in) vertical dimension
• Resolution: ±1.6% of monitor full-scale

LED Indicators

• OK LED (Green):

  • Constant ON: Monitor, transducers, and field wiring are OK
  • OFF: NOT OK or channel bypassed (Bypass LED ON)
  • Flashing at 1 Hz: Transducer was NOT OK but is now OK
  • Flashing at 5 Hz: Error code(s) stored in memory

• Alarm LEDs (Red):

  • Two per channel (Alert & Danger)
  • Flashing LED: Indicates First Out condition

• Bypass LEDs (Red):

  • Indicate Danger Bypass and Rack/Channel Bypass status

Environmental Limits

• Operating Temperature: 0°C to +65°C (+32°F to +150°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Relative Humidity: Up to 95% non-condensing

Certifications & Compliance

CE Mark Directives

• EMC Directive
• Low Voltage Directive

Certificates of Conformity

• 158710
• 135300

Hazardous Area Approvals

• CSA/NRTL/C Class 1 Division 2, Groups A, B, C, D
• T4 @ Ta = 65°C

Physical Specifications

Rack Space Requirements

• First & second slots in rack reserved for Power Supply and System Monitor
• Monitor can be placed in any available rack position
• Rack size depends on the number of monitors used

Weight

• 1 kg (2.2 lbs.)

Ordering Information

Tachometer Options

Overspeed Protection System Part Number

3300/53-AA-BB-CC-DD-EE-FF-GG-HH
Example: 3300/53-03-02-00-60-05-00-00-00

AA – System Configuration

• 03: 3-Channel System

BB – Power Input Voltage

• 02: 220 Vac power supply

CC – Events Per Revolution (Hundreds)

• 00: 0 Hundreds of events per revolution

DD – Events Per Revolution (Units)

• 60: 60 Units of events per revolution

EE – Recorder Full-Scale Range

• 05: 5000 RPM Recorder Full Scale

FF – Agency Approvals

• 00: No agency approval

GG – Coil 1 Voltage Rating

• 00: Non-BASEEFA Approval

HH – Coil 2 Voltage Rating

• 00: Non-BASEEFA Approval

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Contact Us

• Phone: +86-15915488782
• Email: [email protected]
• WhatsApp: +8615915488782
• Business Hours: 24/7 service
• Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China

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