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TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 I-5
Monday
, November 26, 2001 1:09 pm
Some points to consider when designing mounting fixtures for the
transducer:
• The fixture should be as rigid as possible, as any motion between
the fixture and the breaker appears as an error in the results. This
is particularly noticeable if the fixture shakes when the breaker
strikes the stop at the end of its travel. This creates the appearance
of faulty damping when none exists.
• Be careful in the design of fixtures and devices applied to the
moving parts of the breaker mechanism to ensure no interference
occurs when the breaker operates.
• Large forces are generated when a breaker is operated; do not
stand in line with the motion of the connecting rod or allow loose
parts near the transducer.
Specifications
The TR3190 Motion Transducer is designed for interfacing to circuit
breakers measuring the motion and velocity of the operating mechanism,
and particularly the movement of the contacts. Table I.1 lists its
specifications.
N
OTE
In Table I.1, “g” refers to gravities.
Table I.1 TR3190
™
Specifications
Specification Values
Range of measurement Linear motion 0.0" - 40.0"
Rotary motion 0.00° - 2880°
Velocity Linear motion 50.0 ft./sec (maximum)
Rotary motion 120 rev/sec (maximum)
43200°/sec (maximum)
Acceleration Linear 100g
400g for 50
µ
sec
Rotary 125,000 Rad./sec
2
7.162 x 106 °/sec
2