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TR-Jr.
Fully Automatic Single Phase Ratiometer
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Description |
The Turns Ratio Jr. (TR-Jr.) was designed to be a rugged and
reliable automatic transformer ratiometer. This system has
a high degree of accuracy and will test ratios to 4000:1.
The design of this test system is based upon the popular Raytech
Automatic Three Phase test set: TR-Spy.
- The test set has a graphical display of tap changer test
sequences. When in this mode,
an operator can run through a tap testing sequence while
the test set is measuring. At
the end of the sequence, the operator can easily see if
there is a deviation in the linear
expectation.
- The system applies a preset voltage of 40 or 10 VAC (60Hz)
on the HIGH winding side of the transformer and measures
back through the LOW side of the transformer. The results
are reported on the easy to read liquid crystal display.
- This is a no maintenance required test set. There is no
calibration procedure (No
potentiometers to turn). This is due to the utilization
of high precision components in thes design.
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Specifications |
Model: TR-Jr.
Size: L: 14 in. (356 mm) W: 10 in.
(254 mm) H: 6 in. (155 mm)
Weight: 10 lbs. (4.5 kg)
Input Power: 100 to 240 VAC 50 /
60 Hz Autoranging. Fuse: 2 Amp
Output Voltage: User Selectable:
10 & 40 VAC at 1 ampere
Panel Display: LCD Graphic with
back lighting
Front Panel: Sealed, Piezo-electric
actuation
Interface : 9 Pin RS232 Serial /
25 Pin Centronics Parallel
Memory Storage: Internally stores
complete test results with 33 tap measurements each
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Measurement Parameters |
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Turns Ratio Range: 0.8 …
4000 Resolution: 5 Digits
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Accuracy |
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Range 0.8 … 2000 ±
0.1 % with 40 Volt ± 0.15 % with 10 Volt
Range
2001 … 4000 ± 0.2 % with 40 Volt ± 0.4
% with 10 Volt |
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Current
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| Range: |
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0 ... 1 Ampere |
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| Accuracy: |
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± 0.001 Ampere |
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| Resolution:
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0.0001 Ampere |
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Temperature: Operating - 10° C to 60° C Storage
- 40° C to 70° C
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Features |
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• Laboratory accuracy of measurements of Turns Ratio
and Current
• Graphical display of tap changer test results
• Fully automatic, continuous operation
• Internal storage for test results
• Single push button operation
• Two voltage ranges: 10V & 40V
• Comparison with a nominal ratio
• Load on test object < 0.05 VA
• Heavy duty protection circuitry
• Centronics (Parallel) & RS232 (Serial) Interface
• Safety Emergency shut off switch
• System is housed in a Rugged, Lightweight, and
Water-proof case
• Self calibrating
• 5 Year standard warranty
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Standard Accessories |
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• Cable carrying
bag with shoulder strap
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H & X measuring leads – dual-colored, 3.5 Meters
in length
• Power
cord – 8 ft. in length
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Operation manual
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Test Certificate
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Optional Accessories |
• SM202
Extended cable lengths (user specified in 30 foot increments).
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SM202x
- Extension cable (Custom lengths up to 10 meters, user specified)
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SM203 - Custom clamping
devices (user specified).
• SM204
- External portable power supply
• SM207
- Verification box
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