
72A-1898 Rev. A 11/01
I-1
Monday
, November 26, 2001 1:09 pm
Appendix I. Application Notes
This appendix contains the application notes relevant to operating the
TDR9000 and the TR3190.
These include:
• AN2: TR3190 Digital, Linear/Rotary Motion Transducer
• AN3: TR3190 Mechanical Interfaces and Other Transducers
• AN4: TDR9000 Contact Dynamics Resistor Measurement
• AN6: Velocity Measurements
• AN7: Monitoring Closing Coil Current with the TDR90000
Current Shunt in the Close Circuit
• AN8: Simultaneous Energization of Two Sets of Trip Coils in a
Single Circuit Breaker
• AN9: Use of the Auxiliary Wet/Dry Contact Monitor
• AN10: Contact Sensing and Test Lead Connections
• AN11: Sampling Rates
• AN13: Safety Grounds, Close Connected Transformers and the
Use of the TDR9000 OCB/Dead Tank Contact Monitors
AN2: TR3190
™
Digital, Linear/Rotary Motion Transducer
The TR3190 transducer is used to measure the position and velocity of
the operating mechanism of a circuit breaker.
This transducer consists of a reference disk of known diameter, which is
directly coupled to an optical shaft encoder. When the breaker operates,
it displaces a rod, whose motion is transmitted through a high pressure
friction drive to the circumference of the reference disk. The angular
displacement of the disk is proportional to the linear travel of the rod,
and is encoded by the optical shaft encoder.
With the addition of the rotary adapter, the rotary motion of a shaft in a
circuit breaker can be coupled to the transducer and a measurement of
angular displacement and angular velocity is obtainable.
The optical encoder translates the rotation of a shaft into interruptions of
a light beam. The light source, a light emitting diode, is collimated by a
molded lens into a parallel beam of light. The light beam is interrupted
by a code wheel comprised of a metal disk with equally positioned
apertures around its periphery.
Содержание TDR9000
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