Overview
Manuals
Technical Notes
How a Case Expansion Transducer Works
Features:
- 24765 and 135613 Case Expansion Transducer Systems
- 135613 dc LVDT High Temperature Case Expansion Transducer System
- High Temperature Case Expansion Transducer Assembly (dc)
An important position measurement in Turbine Supervisory Instrumentation (TSI) is case expansion. Case expansion (sometimes referred to as shell expansion) is the thermal growth of the machine case as it expands during machine startup and on-line operations. The case expansion transducer system is typically mounted on the foundation at the opposite end from where the turbine casing is attached to the foundation and provides information about the growth of the machine case relative to the foundation.
The case expansion transducer assembly consists of a linear variable differential transformer (LVDT), which is housed in a weatherproof, protective enclosure.
The 135613-01-01 Bently Nevada High Temperature Case Expansion Transducer Assembly may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 135613-01-01 High Temperature Case Expansion Transducer Assembly Manuals(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Case expansion is a parameter that you should use a dual transducer arrangement to measure. This arrangement provides information about the position of the sliding feet on the machine case. A condition that obstructs or jams one foot could distort the case and damage the machine. The dual case expansion transducer configuration in conjunction with the 3300 or 3500 monitors provides an alarm for this condition. The high temperature dual case expansion transducer configuration is compatible only with the 3500/45 Position Monitor.
The case expansion transducer system uses the LVDT to measure the machine case thermal growth.
A rod on the LVDT connects to the machine.As the machine case grows, the rod moves inside the LVDT and changes the signal in the LVDT.
The transducer electronically conditions the signal and outputs it to a monitor for display and alarms.The High Temperature Case Expansion Transducer is designed to meet TYPE 4 requirements.
